Alert archive / Iowa / Winter Storm Warnings in 2018

Winter Storm Warning 9, NWS Des Moines, IA

April 17, 201820 counties in Iowa

NWS Des Moines, IA issued this winter storm warning at Apr 17, 2018, 3:54 AM CDT for 20 counties in Iowa. It took effect at Apr 18, 2018, 1:00 AM CDT. It was in force for 17 hr. 51 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 17, 2018, 3:54 AM CDT (08:54 UTC)
In effect from
Apr 18, 2018, 1:00 AM CDT
Expired
Apr 18, 2018, 5:56 PM CDT
In force
17 hr
Issued by
NWS Des Moines, IA

Counties Black Hawk County, IA, Bremer County, IA, Butler County, IA, Calhoun County, IA, Cerro Gordo County, IA, Emmet County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Kossuth County, IA, Palo Alto County, IA, Pocahontas County, IA, Sac County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA

The radar

The Des Moines radar (KDMX), 118 km from the middle of the area, began a volume at 08:52 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Apr 18, 9:45 AM CDTSNOW 45 Se Meservey, IA
Apr 18, 9:59 AM CDTSNOW 5.5Hanlontown, IAVIA SOCIAL MEDIA.
Apr 18, 10:00 AM CDTSNOW 5Palmer, IAVIA SOCIAL MEDIA.
Apr 18, 10:05 AM CDTHEAVY SNOW 3.53 Sw Fertile, IASINCE 800 AM. 1.5 INCHES IN PAST HOUR.
Apr 18, 10:15 AM CDTSNOW 0.3La Porte City, IAVIA SOCIAL MEDIA.
Apr 18, 10:15 AM CDTSNOW 3.3Mason City, IAVIA KIMT TV.
Apr 18, 10:27 AM CDTSNOW 32 Ne Fort Dodge, IA
Apr 18, 10:28 AM CDTSNOW 32 Ene Fort Dodge, IAVISIBILITY DOWN 3/4 MILE.
Apr 18, 10:30 AM CDTSNOW 4.5Lake Mills, IAVIA SOCIAL MEDIA.
Apr 18, 10:30 AM CDTSNOW 6Leland, IAVIA SOCIAL MEDIA.
Apr 18, 10:47 AM CDTSNOW 4.84 E Belmond, IAVIA SOCIAL MEDIA.
Apr 18, 11:00 AM CDTSNOW 62 N Forest City, IAKIOW RADIO.
Apr 18, 11:00 AM CDTSNOW 6.51 Nnw Clear Lake, IA
Apr 18, 11:00 AM CDTSNOW 7Wesley, IAVIA SOCIAL MEDIA.
Apr 18, 11:15 AM CDTSNOW 1.5Webster City, IAVIA SOCIAL MEDIA.
Apr 18, 11:27 AM CDTSNOW 4.9Mason City, IAVIA SOCIAL MEDIA.
Apr 18, 11:30 AM CDTSNOW 3.5Bristow, IAVIA SOCIAL MEDIA.
Apr 18, 11:30 AM CDTSNOW 4.51 Nw Estherville, IA
Apr 18, 11:30 AM CDTSNOW 6Northwood, IA
Apr 18, 11:30 AM CDTSNOW 71 Nnw Ringsted, IA
Apr 18, 11:40 AM CDTSNOW 7Lake Mills, IAVIA SOCIAL MEDIA.
Apr 18, 11:45 AM CDTSNOW 6.34 Sw Emmetsburg, IAVIA SOCIAL MEDIA.
Apr 18, 11:48 AM CDTSNOW 1.2Lehigh, IAVIA SOCIAL MEDIA.
Apr 18, 11:52 AM CDTSNOW 6Grafton, IAVIA SOCIAL MEDIA.
Apr 18, 11:53 AM CDTSNOW 4Emmetsburg, IA
Apr 18, 11:56 AM CDTSNOW 81 Nnw Clear Lake, IATOTAL SINCE 8 AM.
Apr 18, 12:01 PM CDTSNOW 4.5Emmetsburg, IAVIA SOCIAL MEDIA.
Apr 18, 12:30 PM CDTSNOW 4Clarion, IA
Apr 18, 12:51 PM CDTSNOW 8Scarville, IATOTAL SINCE 7:30 AM.
Apr 18, 12:55 PM CDTSNOW 91 Nnw Clear Lake, IA
Apr 18, 1:00 PM CDTSNOW 1.51 Sse Waterloo, IA
Apr 18, 1:00 PM CDTSNOW 6.51 Nne Mason City, IA
Apr 18, 1:13 PM CDTSNOW 6.5Mason City, IAEVENT TOTAL THROUGH 1:00 PM.
Apr 18, 1:15 PM CDTSNOW 61 W Hampton, IA
Apr 18, 1:26 PM CDTSNOW 1.52 Sse Waterloo, IAMOSTLY SLEET.
Apr 18, 1:57 PM CDTSNOW 5.52 S Algona, IA
Apr 18, 2:00 PM CDTSNOW 7Forest City, IAVIA SOCIAL MEDIA.
Apr 18, 2:00 PM CDTSNOW 81 Nw Ringsted, IA
Apr 18, 2:00 PM CDTSNOW 9.51 Nnw Clear Lake, IAVIA SOCIAL MEDIA.
Apr 18, 2:00 PM CDTSNOW 10Northwood, IAVIA SOCIAL MEDIA.
Apr 18, 2:02 PM CDTSNOW 8Wesley, IAVIA SOCIAL MEDIA.
Apr 18, 2:34 PM CDTSNOW 31 Ne Iowa Falls, IASNOW STILL FALLING.
Apr 18, 2:40 PM CDTSNOW 7Ringsted, IASTILL SNOWING - VIA SOCIAL MEDIA.
Apr 18, 2:50 PM CDTSNOW 11.5Kensett, IAVIA SOCIAL MEDIA.
Apr 18, 4:00 PM CDTSNOW 5Clarksville, IA
Apr 18, 4:15 PM CDTSNOW 1.91 Ne Waterloo, IAMEASURED BY KWWL-TV OUTSIDE THEIR STUDIO.
Apr 18, 4:17 PM CDTHEAVY SNOW 12Thompson, IAREPORTED BY KAAL-TV.
Apr 18, 4:30 PM CDTSNOW 4.5Plainfield, IA
Apr 18, 4:50 PM CDTSNOW 3Denver, IA
Apr 18, 5:00 PM CDTHEAVY SNOW 8Swaledale, IA
Apr 18, 5:23 PM CDTSNOW 2.3Cedar Falls, IA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 8.9 hours before the alert went out and 229 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2018-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2018-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1261 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
19 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

433 
WWUS43 KDMX 170854
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
354 AM CDT Tue Apr 17 2018

...Fast Moving Late Season Winter Storm to Impact Iowa Late 
Tonight Through Wednesday Evening...

.Strong low pressure will reach Iowa early Wednesday morning 
spreading a wintry mixture of freezing rain, sleet, and snow over
much of northern Iowa. A rapid changeover to all snow will occur 
over the northwest and north resulting in an area of heavy snow. 
Winds from the northwest will turn gusty Wednesday afternoon into 
the evening. Travel is expected to become hazardous with snow and 
blowing snow and reduced visibility at times during the period. 
Some ice and snow accumulation may result in periods of hazardous 
travel between Highway 30 and Highway 20 as well.

IAZ004-005-015-024-171700-
/O.UPG.KDMX.WS.A.0009.180418T0600Z-180419T0600Z/
/O.NEW.KDMX.WS.W.0009.180418T0600Z-180419T0300Z/
Emmet-Kossuth-Palo Alto-Humboldt-
Including the cities of Estherville, Algona, Emmetsburg, 
and Humboldt
354 AM CDT Tue Apr 17 2018

...WINTER STORM WARNING IN EFFECT FROM 1 AM TO 10 PM CDT
WEDNESDAY...

* WHAT...Heavy mixed precipitation expected. Total snow
  accumulations of 5 to 8 inches and ice accumulations of a light
  glaze are expected. Snowfall rates may approach an inch per hour
  Wednesday during periods of heavy snowfall.

* WHERE...Portions of North Central Iowa.

* WHEN...From 1 AM to 10 PM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Wednesday. Expect 
  significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ006-007-016-017-025>027-171700-
/O.UPG.KDMX.WS.A.0009.180418T0600Z-180419T0600Z/
/O.NEW.KDMX.WS.W.0009.180418T0900Z-180419T0600Z/
Winnebago-Worth-Hancock-Cerro Gordo-Wright-Franklin-Butler-
Including the cities of Forest City, Lake Mills, Northwood, 
Manly, Garner, Britt, Kanawha, Mason City, Clear Lake, 
Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville,
Shell Rock, Greene, Aplington, Allison, and Dumont
354 AM CDT Tue Apr 17 2018

...WINTER STORM WARNING IN EFFECT FROM 4 AM WEDNESDAY TO 1 AM CDT
THURSDAY...

* WHAT...Heavy mixed precipitation expected. Total snow
  accumulations of 6 to 8 inches, with locally higher amounts
  possible, and ice accumulations of up to one tenth of inch are
  possible. Gusty winds late Wednesday afternoon and evening may
  create areas of blowing snow into the evening hours. Snowfall
  rates may approach an inch per hour Wednesday during periods of
  heavy snowfall.

* WHERE...Portions of North Central and Northeast Iowa.

* WHEN...From 4 AM Wednesday to 1 AM CDT Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Wednesday. Expect 
  significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ028-171700-
/O.NEW.KDMX.WS.W.0009.180418T0900Z-180419T0600Z/
Bremer-
Including the city of Waverly
354 AM CDT Tue Apr 17 2018

...WINTER STORM WARNING IN EFFECT FROM 4 AM WEDNESDAY TO 1 AM CDT
THURSDAY...

* WHAT...Heavy mixed precipitation expected. Total snow
  accumulations of 4 to 6 inches and ice accumulations of up to
  one tenth of an inch are expected. Gusty winds late Wednesday
  afternoon and evening may create areas of blowing snow into the
  evening hours. Snowfall rates may approach an inch per hour
  Wednesday during periods of heavy snowfall.

* WHERE...Northeast Iowa.

* WHEN...From 4 AM Wednesday to 1 AM CDT Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Wednesday. Expect 
  significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ023-171700-
/O.UPG.KDMX.WS.A.0009.180418T0600Z-180419T0600Z/
/O.NEW.KDMX.WW.Y.0022.180418T0600Z-180419T0300Z/
Pocahontas-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
and Gilmore City
354 AM CDT Tue Apr 17 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM 1 AM TO 10 PM CDT
WEDNESDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  3 to 5 inches and ice accumulations of up to one tenth of an
  inch are expected. Snowfall rates may approach an inch per hour
  Wednesday during periods of heavy snowfall.

* WHERE...Portions of Northwest Iowa.

* WHEN...From 1 AM to 10 PM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Wednesday. Expect 
  reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ033>035-044>046-171700-
/O.NEW.KDMX.WW.Y.0022.180418T0600Z-180419T0300Z/
Sac-Calhoun-Webster-Crawford-Carroll-Greene-
Including the cities of Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Fort Dodge, Denison, Carroll, and Jefferson
354 AM CDT Tue Apr 17 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM 1 AM TO 10 PM CDT
WEDNESDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  2 to 4 inches, and ice accumulations of up to one tenth of an
  inch are expected. Snowfall rates may approach an inch per hour
  Wednesday during periods of heavy snowfall.

* WHERE...Portions of West Central through Central Iowa.

* WHEN...From 1 AM to 10 PM CDT Wednesday.

* ADDITIONAL DETAILS...The ice will result in difficult travel 
  conditions, including during the morning commute on Wednesday. 
  Expect reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ036>039-047>050-171700-
/O.NEW.KDMX.WW.Y.0022.180418T0900Z-180419T0600Z/
Hamilton-Hardin-Grundy-Black Hawk-Boone-Story-Marshall-Tama-
Including the cities of Webster City, Iowa Falls, Eldora, Ackley,
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
Cedar Falls, Boone, Ames, Marshalltown, Tama, Toledo, Traer, 
Dysart, and Gladbrook
354 AM CDT Tue Apr 17 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM WEDNESDAY TO 1 AM
CDT THURSDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  1 to 3 inches, with localized amounts up to 4 inches, and ice
  accumulations of up to two tenths of an inch are expected. Snowfall
  rates may approach an inch per hour Wednesday during periods of
  heavy snowfall.

* WHERE...Portions of Central to Northeast Iowa.

* WHEN...From 4 AM Wednesday to 1 AM CDT Thursday.

* ADDITIONAL DETAILS...The ice will result in difficult travel 
  conditions, including during the morning commute on Wednesday. 
  Expect reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/desmoines
9 follow-up statements
642 
WWUS43 KDMX 171439
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
939 AM CDT Tue Apr 17 2018

...Fast Moving Late Season Winter Storm to Impact Iowa Late
Tonight Through Wednesday Evening...

.Strong low pressure will spread a wintry mixture of freezing 
rain, sleet, and snow over much of northern Iowa by early
Wednesday morning. A rapid changeover to all snow will occur over
the northwest and north resulting in an area of heavy snow. Winds
from the northwest will turn gusty Wednesday afternoon into the 
evening. Travel is expected to become hazardous with snow and 
blowing snow and reduced visibility at times during the period. 
Some ice and snow accumulation may result in periods of hazardous 
travel between Highway 30 and Highway 20 as well.

IAZ004-005-015-024-172245-
/O.CON.KDMX.WS.W.0009.180418T0600Z-180419T0300Z/
Emmet-Kossuth-Palo Alto-Humboldt-
Including the cities of Estherville, Algona, Emmetsburg, 
and Humboldt
939 AM CDT Tue Apr 17 2018

...WINTER STORM WARNING REMAINS IN EFFECT FROM 1 AM TO 10 PM CDT
WEDNESDAY...

* WHAT...Heavy mixed precipitation expected. Total snow
  accumulations of 5 to 8 inches and ice accumulations of a light
  glaze are expected.

* WHERE...Portions of North Central Iowa.

* WHEN...From 1 AM to 10 PM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the morning commute on Wednesday. Expect
  significant reductions in visibility at times in part due to
  blowing snow and snowfall rates that may approach an inch per
  hour during periods of heavy snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ006-007-016-017-025>028-172245-
/O.CON.KDMX.WS.W.0009.180418T0900Z-180419T0600Z/
Winnebago-Worth-Hancock-Cerro Gordo-Wright-Franklin-Butler-Bremer-
Including the cities of Forest City, Lake Mills, Northwood, 
Manly, Garner, Britt, Kanawha, Mason City, Clear Lake, 
Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville,
Shell Rock, Greene, Aplington, Allison, Dumont, and Waverly
939 AM CDT Tue Apr 17 2018

...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM WEDNESDAY TO
1 AM CDT THURSDAY...

* WHAT...Heavy mixed precipitation expected. Total snow
  accumulations of 5 to 8 inches, with localized higher amounts, 
  and ice accumulations of around one tenth are expected.

* WHERE...Portions of North Central and Northeast Iowa.

* WHEN...From 4 AM Wednesday to 1 AM CDT Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the morning commute on Wednesday. Expect
  significant reductions in visibility at times in part due to
  blowing snow and snowfall rates that may approach an inch per
  hour during periods of heavy snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ023-033>035-044>046-172245-
/O.CON.KDMX.WW.Y.0022.180418T0600Z-180419T0300Z/
Pocahontas-Sac-Calhoun-Webster-Crawford-Carroll-Greene-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, Sac City, Lake View, Odebolt, Wall Lake, Schaller, 
Early, Rockwell City, Manson, Lake City, Pomeroy, Fort Dodge, 
Denison, Carroll, and Jefferson
939 AM CDT Tue Apr 17 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 AM TO 10 PM
CDT WEDNESDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  2 to 4 inches, with localized higher amounts closer to Highway
  20, and ice accumulations of up to one tenth of an inch are 
  expected.

* WHERE...Portions of Northwest Iowa.

* WHEN...From 1 AM to 10 PM CDT Wednesday.

* ADDITIONAL DETAILS...The ice will result in difficult travel
  conditions, including during the morning commute on Wednesday.
  Expect reduced visibilities at times. Expect significant 
  reductions in visibility at times in part due to blowing snow 
  and snowfall rates that may approach an inch per hour during 
  periods of heavy snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ036>039-047>050-172245-
/O.CON.KDMX.WW.Y.0022.180418T0900Z-180419T0600Z/
Hamilton-Hardin-Grundy-Black Hawk-Boone-Story-Marshall-Tama-
Including the cities of Webster City, Iowa Falls, Eldora, Ackley,
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
Cedar Falls, Boone, Ames, Marshalltown, Tama, Toledo, Traer, 
Dysart, and Gladbrook
939 AM CDT Tue Apr 17 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM WEDNESDAY
TO 1 AM CDT THURSDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  1 to 3 inches, with localized amounts up to 4 inches closer to
  Highway 20, and ice accumulations generally up to one tenth of 
  an inch are expected.

* WHERE...Portions of Central to Northeast Iowa.

* WHEN...From 4 AM Wednesday to 1 AM CDT Thursday.

* ADDITIONAL DETAILS...The ice will result in difficult travel
  conditions, including during the morning commute on Wednesday.
  Expect reduced visibilities at times. Expect significant 
  reductions in visibility at times in part due to blowing snow 
  and snowfall rates that may approach an inch per hour during 
  periods of heavy snowfall.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/desmoines

Ansorge
721 
WWUS43 KDMX 172043
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
343 PM CDT Tue Apr 17 2018

...Late Season Winter Storm to Impact Iowa Late Tonight Through 
Wednesday Evening...

.Another late season winter storm will affect Iowa very late
tonight into Wednesday. Accumulating moderate to heavy snowfall is
expected across the northern half of Iowa. Some freezing rain is
also anticipated in some portions of central Iowa as well. The
system should pass by Wednesday evening with improving conditions
by then.

IAZ023-035-180445-
/O.UPG.KDMX.WW.Y.0022.180418T0600Z-180419T0300Z/
/O.EXB.KDMX.WS.W.0009.180418T0600Z-180419T0000Z/
Pocahontas-Webster-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, and Fort Dodge
343 PM CDT Tue Apr 17 2018

...WINTER STORM WARNING IN EFFECT FROM 1 AM TO 7 PM CDT
WEDNESDAY...

* WHAT...Heavy snow is expected. Total snow accumulations of 5 to
  7 inches, with localized higher amounts. Some thunder may
  accompany the snowfall with high rates of 1 to 2 inches per
  hour.  

* WHERE...Portions of northern and central Iowa

* WHEN...From 1 AM to 7 PM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Wednesday. Expect 
  significant reductions in visibility at times in part due to 
  blowing snow and snowfall rates that may approach an inch per 
  hour during periods of heavy snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ036>039-180445-
/O.UPG.KDMX.WW.Y.0022.180418T0900Z-180419T0600Z/
/O.EXA.KDMX.WS.W.0009.180418T0900Z-180419T0600Z/
Hamilton-Hardin-Grundy-Black Hawk-
Including the cities of Webster City, Iowa Falls, Eldora, Ackley,
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
and Cedar Falls
343 PM CDT Tue Apr 17 2018

...WINTER STORM WARNING IN EFFECT FROM 4 AM WEDNESDAY TO 1 AM CDT
THURSDAY...

* WHAT...Heavy snow is expected. Total snow accumulations of 5 to
  7 inches, with localized higher amounts. Some thunder may
  accompany the snowfall with high rates of 1 to 2 inches per
  hour.  

* WHERE...Portions of central Iowa near the Highway 20 corridor.

* WHEN...From 4 AM Wednesday to 1 AM CDT Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Wednesday. Expect 
  significant reductions in visibility at times in part due to 
  blowing snow and snowfall rates that may approach an inch per 
  hour during periods of heavy snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ004-005-015-024-180445-
/O.EXT.KDMX.WS.W.0009.180418T0600Z-180419T0000Z/
Emmet-Kossuth-Palo Alto-Humboldt-
Including the cities of Estherville, Algona, Emmetsburg, 
and Humboldt
343 PM CDT Tue Apr 17 2018

...WINTER STORM WARNING NOW IN EFFECT FROM 1 AM TO 7 PM CDT
WEDNESDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 7
  inches. Some thunder may accompany the snow with higher snowfall
  rates of 1 to 2 inches per hour. 

* WHERE...Portions of North Central Iowa.

* WHEN...From 1 AM to 7 PM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Wednesday. Expect 
  significant reductions in visibility at times in part due to 
  blowing snow and snowfall rates that may approach an inch per 
  hour during periods of heavy snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

IAZ006-007-016-017-025>028-180445-
/O.CON.KDMX.WS.W.0009.180418T0900Z-180419T0600Z/
Winnebago-Worth-Hancock-Cerro Gordo-Wright-Franklin-Butler-Bremer-
Including the cities of Forest City, Lake Mills, Northwood, 
Manly, Garner, Britt, Kanawha, Mason City, Clear Lake, 
Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville,
Shell Rock, Greene, Aplington, Allison, Dumont, and Waverly
343 PM CDT Tue Apr 17 2018

...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM WEDNESDAY TO
1 AM CDT THURSDAY...

* WHAT...Heavy snow is expected. Total snow accumulations of 5 to
  8 inches, with localized higher amounts. Some thunder may
  accompany the snow with higher snowfall rates of 1 to 2 inches
  per hour.

* WHERE...Portions of North Central and Northeast Iowa.

* WHEN...From 4 AM Wednesday to 1 AM CDT Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Wednesday. Expect 
  significant reductions in visibility at times in part due to 
  blowing snow and snowfall rates that may approach an inch per 
  hour during periods of heavy snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ057-058-180445-
/O.EXB.KDMX.WW.Y.0022.180418T0600Z-180419T0000Z/
Audubon-Guthrie-
Including the cities of Audubon, Exira, Guthrie Center, Panora, 
Bayard, and Casey
343 PM CDT Tue Apr 17 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM 1 AM TO 7 PM CDT
WEDNESDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  1 to 3 inches. Up to an tenth of an inch of ice is also
  possible.

* WHERE...Portions of central and west central Iowa along the 
  Highway 44 corridor.

* WHEN...From 1 AM to 7 PM CDT Wednesday.

* ADDITIONAL DETAILS...The ice will result in difficult travel
  conditions, including during the morning commute on Wednesday.
  Expect reduced visibilities at times. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ059>062-180445-
/O.EXA.KDMX.WW.Y.0022.180418T0900Z-180419T0600Z/
Dallas-Polk-Jasper-Poweshiek-
Including the cities of Perry, Waukee, Adel, Des Moines, Newton, 
and Grinnell
343 PM CDT Tue Apr 17 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM WEDNESDAY TO 1 AM
CDT THURSDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  1 to 3 inches with higher amounts north of Interstate 80. Some
  light glazing is also possible with up to a tenth of an inch of
  ice.

* WHERE...Portions of central Iowa along the Interstate 80
  corridor.

* WHEN...From 4 AM Wednesday to 1 AM CDT Thursday.

* ADDITIONAL DETAILS...The mixed precipitation will result in
  difficult travel conditions, including during the morning
  commute on Wednesday. Expect reduced visibilities at times,
  especially in the heavier snowfall. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ033-034-044>046-180445-
/O.EXT.KDMX.WW.Y.0022.180418T0600Z-180419T0000Z/
Sac-Calhoun-Crawford-Carroll-Greene-
Including the cities of Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Denison, Carroll, and Jefferson
343 PM CDT Tue Apr 17 2018

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 1 AM TO 7 PM CDT
WEDNESDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  2 to 5 inches, with localized higher amounts closer to Highway
  20. Ice accumulations of up to one tenth of an inch are also
  possible, mainly along the Highway 30 corridor.

* WHERE...Portions of west central and central Iowa.

* WHEN...From 1 AM to 7 PM CDT Wednesday.

* ADDITIONAL DETAILS...The mixed precipitation will result in
  difficult travel conditions, including during the morning
  commute on Wednesday. Expect reduced visibilities at times,
  especially during heavier snowfall. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ047>050-180445-
/O.CON.KDMX.WW.Y.0022.180418T0900Z-180419T0600Z/
Boone-Story-Marshall-Tama-
Including the cities of Boone, Ames, Marshalltown, Tama, Toledo, 
Traer, Dysart, and Gladbrook
343 PM CDT Tue Apr 17 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM WEDNESDAY
TO 1 AM CDT THURSDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  2 to 5 inches. Ice accumulations generally up to one tenth of 
  an inch are expected.

* WHERE...Portions of Central along the Highway 30 corridor.

* WHEN...From 4 AM Wednesday to 1 AM CDT Thursday.

* ADDITIONAL DETAILS...The mixed precipitation will result in
  difficult travel conditions, including during the morning
  commute on Wednesday. Expect reduced visibilities at times,
  especially during the heavier snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/desmoines
163 
WWUS43 KDMX 180228
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
928 PM CDT Tue Apr 17 2018

...Another Winter Storm to Impact Iowa Late Tonight Through 
Wednesday...

.Another late season winter storm will impact Iowa very late 
tonight into Wednesday. Accumulating moderate to heavy snowfall is
expected across the northern half of Iowa. A wintry mix of
precipitation is expected on the southern edge into portions of 
central Iowa as well. The system should pass east by Wednesday 
evening with improving conditions arriving.

IAZ004-005-015-023-024-035-181030-
/O.CON.KDMX.WS.W.0009.180418T0600Z-180419T0000Z/
Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Webster-
Including the cities of Estherville, Algona, Emmetsburg, 
Pocahontas, Laurens, Rolfe, Fonda, Gilmore City, Humboldt, 
and Fort Dodge
928 PM CDT Tue Apr 17 2018

...WINTER STORM WARNING REMAINS IN EFFECT FROM 1 AM TO 7 PM CDT
WEDNESDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 7
  inches. A few areas of thundersnow are possible and may bring a
  period of heavier snowfall rates of 1 to 2 inches per hour.

* WHERE...Portions of North Central Iowa.

* WHEN...From 1 AM to 7 PM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Wednesday. Expect 
  significant reductions in visibility at times in part due to 
  blowing snow and snowfall rates that may approach an inch per 
  hour during periods of heavy snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ006-007-016-017-025>028-036>039-181030-
/O.CON.KDMX.WS.W.0009.180418T0900Z-180419T0600Z/
Winnebago-Worth-Hancock-Cerro Gordo-Wright-Franklin-Butler-Bremer-
Hamilton-Hardin-Grundy-Black Hawk-
Including the cities of Forest City, Lake Mills, Northwood, 
Manly, Garner, Britt, Kanawha, Mason City, Clear Lake, 
Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville,
Shell Rock, Greene, Aplington, Allison, Dumont, Waverly, 
Webster City, Iowa Falls, Eldora, Ackley, Grundy Center, 
Reinbeck, Conrad, Dike, Wellsburg, Waterloo, and Cedar Falls
928 PM CDT Tue Apr 17 2018

...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM WEDNESDAY TO
1 AM CDT THURSDAY...

* WHAT...Heavy snow is expected. Total snow accumulations of 5 to
  8 inches, with localized higher amounts. A few areas of
  thundersnow are possible and may bring a period of heavier
  snowfall rates of 1 to 2 inches per hour.

* WHERE...Portions of North Central and Northeast Iowa.

* WHEN...From 4 AM Wednesday to 1 AM CDT Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Wednesday. Expect 
  significant reductions in visibility at times in part due to 
  blowing snow and snowfall rates that may approach an inch per 
  hour during periods of heavy snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ033-034-044>046-057-058-181030-
/O.CON.KDMX.WW.Y.0022.180418T0600Z-180419T0000Z/
Sac-Calhoun-Crawford-Carroll-Greene-Audubon-Guthrie-
Including the cities of Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Denison, Carroll, Jefferson, Audubon, Exira, Guthrie Center, 
Panora, Bayard, and Casey
928 PM CDT Tue Apr 17 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 AM TO 7 PM
CDT WEDNESDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  2 to 5 inches, with localized higher amounts closer to Highway
  20. Ice accumulations up to one tenth of an inch are also 
  possible, mainly along the Highway 30 corridor.

* WHERE...Portions of west central and central Iowa.

* WHEN...From 1 AM to 7 PM CDT Wednesday.

* ADDITIONAL DETAILS...The mixed precipitation will result in 
  difficult travel conditions, including during the morning 
  commute on Wednesday. Expect reduced visibilities at times, 
  especially during heavier snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ047>050-059>062-181030-
/O.CON.KDMX.WW.Y.0022.180418T0900Z-180419T0600Z/
Boone-Story-Marshall-Tama-Dallas-Polk-Jasper-Poweshiek-
Including the cities of Boone, Ames, Marshalltown, Tama, Toledo, 
Traer, Dysart, Gladbrook, Perry, Waukee, Adel, Des Moines, 
Newton, and Grinnell
928 PM CDT Tue Apr 17 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM WEDNESDAY
TO 1 AM CDT THURSDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  1 to 4 inches. Ice accumulations up to one tenth of an inch may
  occur along the Highway 30 corridor.

* WHERE...Portions of Central along the Highway 30 corridor.

* WHEN...From 4 AM Wednesday to 1 AM CDT Thursday.

* ADDITIONAL DETAILS...The mixed precipitation will result in 
  difficult travel conditions, including during the morning 
  commute on Wednesday. Expect reduced visibilities at times, 
  especially during the heavier snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/desmoines
332 
WWUS43 KDMX 180734
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
234 AM CDT Wed Apr 18 2018

...Fast Moving Late Season Winter Storm to Impact Iowa Through 
This Evening...

.A strong late winter storm will impact Iowa through today. Moderate
to heavy snowfall with thundersnow a times is expected across the
northern half of Iowa. A wintry mix of precipitation is expected 
on the southern edge into portions of central Iowa as well. The 
system should pass east by Wednesday evening with improving 
conditions during the late evening hours.

IAZ033-034-181545-
/O.UPG.KDMX.WW.Y.0022.000000T0000Z-180419T0000Z/
/O.EXA.KDMX.WS.W.0009.000000T0000Z-180419T0000Z/
Sac-Calhoun-
Including the cities of Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, and Pomeroy
234 AM CDT Wed Apr 18 2018

...WINTER STORM WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 7 
  inches. A few areas of thundersnow are possible and may bring 
  a period of heavier snowfall rates of 1 to 2 inches per hour.

* WHERE...Portions of Northwest Iowa.

* WHEN...From 1 AM to 7 PM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Wednesday. Expect 
  significant reductions in visibility at times in part due to 
  blowing snow and snowfall rates that may approach an inch per 
  hour during periods of heavy snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ006-007-016-017-025>028-036>039-181545-
/O.CON.KDMX.WS.W.0009.180418T0900Z-180419T0600Z/
Winnebago-Worth-Hancock-Cerro Gordo-Wright-Franklin-Butler-Bremer-
Hamilton-Hardin-Grundy-Black Hawk-
Including the cities of Forest City, Lake Mills, Northwood, 
Manly, Garner, Britt, Kanawha, Mason City, Clear Lake, 
Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville,
Shell Rock, Greene, Aplington, Allison, Dumont, Waverly, 
Webster City, Iowa Falls, Eldora, Ackley, Grundy Center, 
Reinbeck, Conrad, Dike, Wellsburg, Waterloo, and Cedar Falls
234 AM CDT Wed Apr 18 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM CDT
THURSDAY...

* WHAT...Heavy snow is expected. Total snow accumulations of 6 to
  8 inches, with localized higher amounts. A few areas of 
  thundersnow are possible and may bring a period of heavier 
  snowfall rates of 1 to 2 inches per hour.

* WHERE...Portions of North Central and Northeast Iowa.

* WHEN...From 4 AM Wednesday to 1 AM CDT Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Wednesday. Expect 
  significant reductions in visibility at times in part due to 
  blowing snow and snowfall rates that may approach an inch per 
  hour during periods of heavy snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ004-005-015-023-024-035-181545-
/O.CON.KDMX.WS.W.0009.000000T0000Z-180419T0000Z/
Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Webster-
Including the cities of Estherville, Algona, Emmetsburg, 
Pocahontas, Laurens, Rolfe, Fonda, Gilmore City, Humboldt, 
and Fort Dodge
234 AM CDT Wed Apr 18 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 7 
  inches. A few areas of thundersnow are possible and may bring 
  a period of heavier snowfall rates of 1 to 2 inches per hour.

* WHERE...Portions of North Central Iowa.

* WHEN...From 1 AM to 7 PM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute on Wednesday. Expect 
  significant reductions in visibility at times in part due to 
  blowing snow and snowfall rates that may approach an inch per 
  hour during periods of heavy snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ044>046-057-058-181545-
/O.CON.KDMX.WW.Y.0022.000000T0000Z-180419T0000Z/
Crawford-Carroll-Greene-Audubon-Guthrie-
Including the cities of Denison, Carroll, Jefferson, Audubon, 
Exira, Guthrie Center, Panora, Bayard, and Casey
234 AM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Mixed precipitation expected. Total snow accumulations 
  of 2 to 5 inches, with localized higher amounts closer to 
  Highway 20. Ice accumulations up to one tenth of an inch are 
  also possible, mainly along the Highway 30 corridor.

* WHERE...Portions of west central and central Iowa.

* WHEN...From 1 AM to 7 PM CDT Wednesday.

* ADDITIONAL DETAILS...The mixed precipitation will result in 
  difficult travel conditions, including during the morning 
  commute on Wednesday. Expect reduced visibilities at times, 
  especially during heavier snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ047>050-059>062-181545-
/O.CON.KDMX.WW.Y.0022.180418T0900Z-180419T0600Z/
Boone-Story-Marshall-Tama-Dallas-Polk-Jasper-Poweshiek-
Including the cities of Boone, Ames, Marshalltown, Tama, Toledo, 
Traer, Dysart, Gladbrook, Perry, Waukee, Adel, Des Moines, 
Newton, and Grinnell
234 AM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT
THURSDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  1 to 4 inches. Ice accumulations up to one tenth of an inch may
  occur along the Highway 30 corridor.

* WHERE...Portions of Central along the Highway 30 corridor.

* WHEN...From 4 AM Wednesday to 1 AM CDT Thursday.

* ADDITIONAL DETAILS...The mixed precipitation will result in 
  difficult travel conditions, including during the morning 
  commute on Wednesday. Expect reduced visibilities at times, 
  especially during the heavier snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/desmoines
946 
WWUS43 KDMX 180854
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
354 AM CDT Wed Apr 18 2018

...Fast Moving Late Season Winter Storm to Impact Iowa Through
This Evening...

.A strong late winter storm will impact Iowa through today.
Moderate to heavy snowfall with thundersnow a times is expected
across the northern half of Iowa. A wintry mix of precipitation
is expected on the southern edge into portions of central Iowa as
well. The system should pass east by Wednesday evening with
improving conditions during the late evening hours.

IAZ006-007-016-017-025>028-036>039-181700-
/O.CON.KDMX.WS.W.0009.180418T0900Z-180419T0600Z/
Winnebago-Worth-Hancock-Cerro Gordo-Wright-Franklin-Butler-Bremer-
Hamilton-Hardin-Grundy-Black Hawk-
Including the cities of Forest City, Lake Mills, Northwood, 
Manly, Garner, Britt, Kanawha, Mason City, Clear Lake, 
Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville,
Shell Rock, Greene, Aplington, Allison, Dumont, Waverly, 
Webster City, Iowa Falls, Eldora, Ackley, Grundy Center, 
Reinbeck, Conrad, Dike, Wellsburg, Waterloo, and Cedar Falls
354 AM CDT Wed Apr 18 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM CDT
THURSDAY...

* WHAT...Heavy mixed precipitation expected. Total snow
  accumulations of 6 to 8 inches and ice accumulations of a light
  glaze are expected. A few areas of thundersnow are possible and
  may bring a period of heavier snowfall rates of 1 to 2 inches 
  per hour.

* WHERE...Portions of North Central and Northeast Iowa.

* WHEN...Until 1 AM CDT Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute. Expect significant 
  reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ004-005-015-023-024-033>035-181700-
/O.CON.KDMX.WS.W.0009.000000T0000Z-180419T0000Z/
Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Sac-Calhoun-Webster-
Including the cities of Estherville, Algona, Emmetsburg, 
Pocahontas, Laurens, Rolfe, Fonda, Gilmore City, Humboldt, 
Sac City, Lake View, Odebolt, Wall Lake, Schaller, Early, 
Rockwell City, Manson, Lake City, Pomeroy, and Fort Dodge
354 AM CDT Wed Apr 18 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Heavy mixed precipitation. Additional snow accumulations
  of 4 to 7 inches and ice accumulations of a light glaze are
  expected. A few areas of thundersnow are possible and may bring
  a period of heavier snowfall rates of 1 to 2 inches per hour.

* WHERE...Portions of North Central Iowa.

* WHEN...Until 7 PM CDT this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute. Expect significant 
  reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ044>046-057-058-181700-
/O.CON.KDMX.WW.Y.0022.000000T0000Z-180419T0000Z/
Crawford-Carroll-Greene-Audubon-Guthrie-
Including the cities of Denison, Carroll, Jefferson, Audubon, 
Exira, Guthrie Center, Panora, Bayard, and Casey
354 AM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Mixed precipitation. Additional snow accumulations of 2
  to 4 inches and ice accumulations of up to one tenth of an inch
  are expected.

* WHERE...Portions of west central and central Iowa.

* WHEN...Until 7 PM CDT this evening.

* ADDITIONAL DETAILS...The ice will result in difficult travel 
  conditions, including during the morning commute. Expect 
  reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ047>050-059>062-181700-
/O.CON.KDMX.WW.Y.0022.180418T0900Z-180419T0600Z/
Boone-Story-Marshall-Tama-Dallas-Polk-Jasper-Poweshiek-
Including the cities of Boone, Ames, Marshalltown, Tama, Toledo, 
Traer, Dysart, Gladbrook, Perry, Waukee, Adel, Des Moines, 
Newton, and Grinnell
354 AM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT
THURSDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  1 to 3 inches, with localized amounts up to 4 inches, and ice 
  accumulations of up to one tenth of an inch are expected.

* WHERE...Portions of Central along the Highway 30 corridor.

* WHEN...Until 1 AM CDT Thursday.

* ADDITIONAL DETAILS...The ice will result in difficult travel 
  conditions, including during the morning commute. Expect 
  reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/desmoines
201 
WWUS43 KDMX 181135
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
635 AM CDT Wed Apr 18 2018

...Fast Moving Late Season Winter Storm to Impact Iowa Through
This Evening...

.A strong late winter storm will impact Iowa through today.
Moderate to heavy snowfall with thundersnow a times is expected
across the northern half of Iowa. A wintry mix of precipitation
is expected on the southern edge into portions of central Iowa as
well. The system should pass east by Wednesday evening with
improving conditions during the late evening hours.

IAZ006-007-016-017-025>028-036>039-181945-
/O.CON.KDMX.WS.W.0009.000000T0000Z-180419T0600Z/
Winnebago-Worth-Hancock-Cerro Gordo-Wright-Franklin-Butler-Bremer-
Hamilton-Hardin-Grundy-Black Hawk-
Including the cities of Forest City, Lake Mills, Northwood, 
Manly, Garner, Britt, Kanawha, Mason City, Clear Lake, 
Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville,
Shell Rock, Greene, Aplington, Allison, Dumont, Waverly, 
Webster City, Iowa Falls, Eldora, Ackley, Grundy Center, 
Reinbeck, Conrad, Dike, Wellsburg, Waterloo, and Cedar Falls
635 AM CDT Wed Apr 18 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM CDT
THURSDAY...

* WHAT...Heavy mixed precipitation expected. Total snow 
  accumulations of 6 to 8 inches and ice accumulations of a 
  light glaze are expected. A few areas of thundersnow are 
  possible and may bring a period of heavier snowfall rates of 1 
  to 2 inches per hour.

* WHERE...Portions of North Central and Northeast Iowa.

* WHEN...Until 1 AM CDT Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute. Expect significant 
  reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ004-005-015-023-024-033>035-181945-
/O.CON.KDMX.WS.W.0009.000000T0000Z-180419T0000Z/
Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Sac-Calhoun-Webster-
Including the cities of Estherville, Algona, Emmetsburg, 
Pocahontas, Laurens, Rolfe, Fonda, Gilmore City, Humboldt, 
Sac City, Lake View, Odebolt, Wall Lake, Schaller, Early, 
Rockwell City, Manson, Lake City, Pomeroy, and Fort Dodge
635 AM CDT Wed Apr 18 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Heavy mixed precipitation. Additional snow 
  accumulations of 4 to 7 inches and ice accumulations of a 
  light glaze are expected. A few areas of thundersnow are 
  possible and may bring a period of heavier snowfall rates of 1 
  to 2 inches per hour.

* WHERE...Portions of North Central Iowa.

* WHEN...Until 7 PM CDT this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute. Expect significant 
  reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ044>046-057-058-181945-
/O.CON.KDMX.WW.Y.0022.000000T0000Z-180419T0000Z/
Crawford-Carroll-Greene-Audubon-Guthrie-
Including the cities of Denison, Carroll, Jefferson, Audubon, 
Exira, Guthrie Center, Panora, Bayard, and Casey
635 AM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Mixed precipitation. Additional snow accumulations of 2 
  to 4 inches and ice accumulations of up to one tenth of an 
  inch are expected.

* WHERE...Portions of west central and central Iowa.

* WHEN...Until 7 PM CDT this evening.

* ADDITIONAL DETAILS...The ice will result in difficult travel 
  conditions, including during the morning commute. Expect 
  reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ047>050-059>062-181945-
/O.CON.KDMX.WW.Y.0022.000000T0000Z-180419T0600Z/
Boone-Story-Marshall-Tama-Dallas-Polk-Jasper-Poweshiek-
Including the cities of Boone, Ames, Marshalltown, Tama, Toledo, 
Traer, Dysart, Gladbrook, Perry, Waukee, Adel, Des Moines, 
Newton, and Grinnell
635 AM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT
THURSDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations 
  of 1 to 3 inches, with localized amounts up to 4 inches, and 
  ice accumulations of up to one tenth of an inch are expected.

* WHERE...Portions of Central along the Highway 30 corridor.

* WHEN...Until 1 AM CDT Thursday.

* ADDITIONAL DETAILS...The ice will result in difficult travel 
  conditions, including during the morning commute. Expect 
  reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/desmoines
846 
WWUS43 KDMX 181530
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
1030 AM CDT Wed Apr 18 2018

...Late Season Winter Storm to Impact Iowa Through This 
Evening...

.A strong late winter storm will impact Iowa through this evening.
Moderate to heavy snowfall will continue across northern Iowa 
with snowfall rates of 1 inch per possible at times...and 
visibility reduced below one quarter mile. Further south...a 
wintry mix of precipitation including freezing drizzle and sleet 
is expected across central and east-central Iowa this morning 
before transitioning back to snow by early afternoon. The system 
will move east this evening with improving conditions during the 
late evening hours.

Storm total snow amounts should range from 6 to 10 inches along 
and north of US Highway 18...with a few totals near one foot 
possible. Totals will lessen to the south with 1 to 3 inches along
US Highway 30 to a trace south of Interstate 80. 

IAZ006-007-016-017-025>028-036>039-182330-
/O.CON.KDMX.WS.W.0009.000000T0000Z-180419T0600Z/
Winnebago-Worth-Hancock-Cerro Gordo-Wright-Franklin-Butler-Bremer-
Hamilton-Hardin-Grundy-Black Hawk-
Including the cities of Forest City, Lake Mills, Northwood, 
Manly, Garner, Britt, Kanawha, Mason City, Clear Lake, 
Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville,
Shell Rock, Greene, Aplington, Allison, Dumont, Waverly, 
Webster City, Iowa Falls, Eldora, Ackley, Grundy Center, 
Reinbeck, Conrad, Dike, Wellsburg, Waterloo, and Cedar Falls
1030 AM CDT Wed Apr 18 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM CDT
THURSDAY...

* WHAT...Heavy snow and mixed precipitation. Freezing drizzle for
  a time thru mid-morning across Butler, Bremer, and Blackhawk
  counties. Additional snow accumulations of 4 to 7 inches and 
  ice accumulations of a light glaze are expected.

* WHERE...Portions of north central and northeast Iowa.

* WHEN...Until 1 AM CDT Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Expect
  significant reductions in visibility at times below one quarter
  of a mile. Snowfall rates of one inch per hour likely.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ004-005-015-023-024-033>035-182330-
/O.CON.KDMX.WS.W.0009.000000T0000Z-180419T0000Z/
Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Sac-Calhoun-Webster-
Including the cities of Estherville, Algona, Emmetsburg, 
Pocahontas, Laurens, Rolfe, Fonda, Gilmore City, Humboldt, 
Sac City, Lake View, Odebolt, Wall Lake, Schaller, Early, 
Rockwell City, Manson, Lake City, Pomeroy, and Fort Dodge
1030 AM CDT Wed Apr 18 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Heavy snow and brief period of mixed precipitation.
  Additional snow accumulations of 4 to 7 inches and a light glaze
  of ice expected.

* WHERE...Portions of north central Iowa.

* WHEN...Until 7 PM CDT this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Expect
  significant reductions in visibility at times to one quarter
  mile. Snowfall rates of one inch per hour at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ044>046-057-058-182330-
/O.CON.KDMX.WW.Y.0022.000000T0000Z-180419T0000Z/
Crawford-Carroll-Greene-Audubon-Guthrie-
Including the cities of Denison, Carroll, Jefferson, Audubon, 
Exira, Guthrie Center, Panora, Bayard, and Casey
1030 AM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Mixed precipitation...transitioning to snow. Additional
  snow accumulations of up to 2 inches and a light glaze of ice 
  expected.

* WHERE...Portions of west central and central Iowa.

* WHEN...Until 7 PM CDT this evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Expect 
  reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ047>050-059>062-182330-
/O.CON.KDMX.WW.Y.0022.000000T0000Z-180419T0600Z/
Boone-Story-Marshall-Tama-Dallas-Polk-Jasper-Poweshiek-
Including the cities of Boone, Ames, Marshalltown, Tama, Toledo, 
Traer, Dysart, Gladbrook, Perry, Waukee, Adel, Des Moines, 
Newton, and Grinnell
1030 AM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT
THURSDAY...

* WHAT...Mixed precipitation...including freezing rain and sleet
  transitioning to snow. Total snow accumulations of up to 2 
  inches north of US 30 and ice accumulations of up to one tenth 
  of an inch are expected.

* WHERE...Portions of central Iowa along the Highway 30 corridor.

* WHEN...Until 1 AM CDT Thursday.

* ADDITIONAL DETAILS...The ice will result in difficult travel
  conditions. Expect reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/desmoines
537 
WWUS43 KDMX 182001
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
301 PM CDT Wed Apr 18 2018

...Late Season Winter Storm Gradually Diminishing this Evening...

.A strong late winter storm will impact Iowa this afternoon before
gradually diminishing this evening. Light to moderate snowfall 
will continue across central and northern Iowa with visibility 
reduced below one half mile at times. Further south...occasional 
snow showers will continue through evening. The system will move 
east this evening with snow ending by midnight.

Storm total snow amounts will range from 5 to 10 inches along and
north of US Highway 18. Totals will lessen to the south with 2 to
6 inches along US Highway 20...to just a trace amounts south of 
Interstate 80.

IAZ059>062-182115-
/O.CAN.KDMX.WW.Y.0022.000000T0000Z-180419T0600Z/
Dallas-Polk-Jasper-Poweshiek-
Including the cities of Perry, Waukee, Adel, Des Moines, Newton, 
and Grinnell
301 PM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

Occasional snow showers will continue into the early evening 
hours. However, any additional snow accumulations should be minor 
therefore, the advisory has been cancelled. Some icy patches could
develop this evening as refreezing occurs.

$$

IAZ057-058-182115-
/O.CAN.KDMX.WW.Y.0022.000000T0000Z-180419T0000Z/
Audubon-Guthrie-
Including the cities of Audubon, Exira, Guthrie Center, Panora, 
Bayard, and Casey
301 PM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

Occasional snow showers will continue into the early evening 
hours. However, any additional snow accumulations should be minor 
therefore, the advisory has been cancelled. Some icy patches could
develop this evening as refreezing occurs.

$$

IAZ004-005-015-023-024-033>035-190000-
/O.CON.KDMX.WS.W.0009.000000T0000Z-180419T0000Z/
Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Sac-Calhoun-Webster-
Including the cities of Estherville, Algona, Emmetsburg, 
Pocahontas, Laurens, Rolfe, Fonda, Gilmore City, Humboldt, 
Sac City, Lake View, Odebolt, Wall Lake, Schaller, Early, 
Rockwell City, Manson, Lake City, Pomeroy, and Fort Dodge
301 PM CDT Wed Apr 18 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Periods of light to moderate snow will continue through 
  afternoon...diminishing by evening. Additional snow 
  accumulations of 1 to 2 inches are expected.

* WHERE...Portions of north central Iowa.

* WHEN...Until 7 PM CDT this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the evening commute. Expect significant 
  reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

IAZ006-007-016-017-025>028-036>039-190415-
/O.CON.KDMX.WS.W.0009.000000T0000Z-180419T0600Z/
Winnebago-Worth-Hancock-Cerro Gordo-Wright-Franklin-Butler-Bremer-
Hamilton-Hardin-Grundy-Black Hawk-
Including the cities of Forest City, Lake Mills, Northwood, 
Manly, Garner, Britt, Kanawha, Mason City, Clear Lake, 
Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville,
Shell Rock, Greene, Aplington, Allison, Dumont, Waverly, 
Webster City, Iowa Falls, Eldora, Ackley, Grundy Center, 
Reinbeck, Conrad, Dike, Wellsburg, Waterloo, and Cedar Falls
301 PM CDT Wed Apr 18 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM CDT
THURSDAY...

* WHAT...Periods of light to moderate snow will continue through
  evening...diminishing by midnight. Additional snow accumulations
  of 1 to 2 inches are possible.

* WHERE...Portions of north central and northeast Iowa.

* WHEN...Until 1 AM CDT Thursday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the evening commute. Expect significant 
  reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

IAZ047>050-190415-
/O.CON.KDMX.WW.Y.0022.000000T0000Z-180419T0600Z/
Boone-Story-Marshall-Tama-
Including the cities of Boone, Ames, Marshalltown, Tama, Toledo, 
Traer, Dysart, and Gladbrook
301 PM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT
THURSDAY...

* WHAT...Occasional moderate snow showers. Additional snow
  accumulations up to 1 inch.

* WHERE...Portions of central Iowa along the Highway 30 corridor.

* WHEN...Until 1 AM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the evening commute. Expect reduced 
  visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ044>046-190000-
/O.CON.KDMX.WW.Y.0022.000000T0000Z-180419T0000Z/
Crawford-Carroll-Greene-
Including the cities of Denison, Carroll, and Jefferson
301 PM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Occasional moderate snow showers. Additional snow 
  accumulations of up to one inch are expected.

* WHERE...Portions of west central and central Iowa.

* WHEN...Until 7 PM CDT this evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the evening commute. Expect reduced 
  visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. The
latest road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/desmoines
815 
WWUS43 KDMX 182256
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
556 PM CDT Wed Apr 18 2018

...Conditions will continue to improve through this Evening...

.Winter storm will continue to move away from the area through
this evening with conditions improving.

IAZ007-017-026>028-039-190600-
/O.CAN.KDMX.WS.W.0009.000000T0000Z-180419T0600Z/
/O.EXA.KDMX.WW.Y.0022.000000T0000Z-180419T0600Z/
Worth-Cerro Gordo-Franklin-Butler-Bremer-Black Hawk-
Including the cities of Northwood, Manly, Mason City, Clear Lake,
Hampton, Parkersburg, Clarksville, Shell Rock, Greene, Aplington,
Allison, Dumont, Waverly, Waterloo, and Cedar Falls
556 PM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 1 AM CDT THURSDAY...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Light Snow. Additional snow accumulations of an inch or
  less. Road conditions have improved however some refreezing on
  untreated surfaces is possible overnight.

* WHERE...Portions of north central Iowa.

* WHEN...Until 1 AM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the evening commute. Expect reduced 
  visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. The
latest road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ006-016-025-036>038-190000-
/O.CAN.KDMX.WS.W.0009.000000T0000Z-180419T0600Z/
/O.EXB.KDMX.WW.Y.0022.000000T0000Z-180419T0000Z/
Winnebago-Hancock-Wright-Hamilton-Hardin-Grundy-
Including the cities of Forest City, Lake Mills, Garner, Britt, 
Kanawha, Eagle Grove, Clarion, Belmond, Webster City, Iowa Falls,
Eldora, Ackley, Grundy Center, Reinbeck, Conrad, Dike, 
and Wellsburg
556 PM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 PM CDT THIS
EVENING...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Light Snow. Little to no additional accumulations
  expected. Road conditions have improved however some refreezing
  on untreated surfaces is possible overnight.

* WHERE...Portions of north central Iowa.

* WHEN...Until 7 PM CDT this evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the evening commute. Expect reduced 
  visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. The
latest road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ004-005-190000-
/O.CAN.KDMX.WS.W.0009.000000T0000Z-180419T0000Z/
/O.EXB.KDMX.WW.Y.0022.000000T0000Z-180419T0000Z/
Emmet-Kossuth-
Including the cities of Estherville and Algona
556 PM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 PM CDT THIS
EVENING...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Light Snow. Little to no additional accumulations
  expected. Road conditions have improved however some refreezing on
  untreated surfaces is possible overnight.

* WHERE...Emmett and Kossuth Counties.

* WHEN...Until 7 PM CDT this evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the evening commute. Expect reduced 
  visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. The
latest road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

IAZ015-023-024-033>035-190000-
/O.CAN.KDMX.WS.W.0009.000000T0000Z-180419T0000Z/
Palo Alto-Pocahontas-Humboldt-Sac-Calhoun-Webster-
Including the cities of Emmetsburg, Pocahontas, Laurens, Rolfe, 
Fonda, Gilmore City, Humboldt, Sac City, Lake View, Odebolt, 
Wall Lake, Schaller, Early, Rockwell City, Manson, Lake City, 
Pomeroy, and Fort Dodge
556 PM CDT Wed Apr 18 2018

...WINTER STORM WARNING IS CANCELLED...

Light snow is possible with little to no additional accumulations.
Some refreezing on untreated surfaces is possible overnight.

$$

IAZ044>046-190000-
/O.CAN.KDMX.WW.Y.0022.000000T0000Z-180419T0000Z/
Crawford-Carroll-Greene-
Including the cities of Denison, Carroll, and Jefferson
556 PM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

Light snow is possible with little to no additional accumulations.
Some refreezing on untreated surfaces is possible overnight.

$$

IAZ047-048-190000-
/O.CAN.KDMX.WW.Y.0022.000000T0000Z-180419T0600Z/
Boone-Story-
Including the cities of Boone and Ames
556 PM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

Light snow is possible with little to no additional accumulations.
Some refreezing on untreated surfaces is possible overnight.

$$

IAZ049-050-190000-
/O.EXT.KDMX.WW.Y.0022.000000T0000Z-180419T0000Z/
Marshall-Tama-
Including the cities of Marshalltown, Tama, Toledo, Traer, 
Dysart, and Gladbrook
556 PM CDT Wed Apr 18 2018

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Light Snow. Little to no additional accumulations
  expected. Road conditions have improved however some refreezing on
  untreated surfaces is possible overnight.

* WHERE...Portions of central Iowa along the Highway 30 corridor.

* WHEN...Until 7 PM CDT this evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the evening commute. Expect reduced 
  visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/desmoines

What forecasters said that day

The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Des Moines, IA wrote its last area forecast discussion before this winter storm warning went out at Apr 17, 3:38 AM CDT, 16 minutes earlier.

Area forecast discussion, Apr 17, 3:38 AM CDT, 16 minutes before
Area Forecast Discussion...Correction to periods
National Weather Service Des Moines IA
338 AM CDT Tue Apr 17 2018

.SHORT TERM.../Today through Wednesday Night/
Issued at 332 AM CDT Tue Apr 17 2018

Confidence: Medium

Today will be pleasant compared to later tonight into Wednesday.
Clouds will be on the increase today ahead of the storm with
cloudy skies tonight. Highs today will recover to the mid to
upper 30s north and the upper 40s to lower 50s over the south.
Tonight with the low passing southeast of the region temperatures
will fall into the upper 20s north and in the mid 30s across the
south. The freezing line will be near the US 30 corridor.

Storm still on track to reach Iowa later tonight and bring a quick
hit of snow/freezing rain/and wind.  Models tonight are tracking
farther south and colder than earlier runs.  The GFS/Euro/NAM all
suggest abundant moisture available for snow production across the
north. Deep lift in the H700-H600 layer with potential for
elevated instability over the east may lead to more widespread
heavy snow farther south. H850 inflow into the storm of 40 to 45
kts from 09z through 17z will aid in 1 inch snowfall rates per
hour across the north during that time. Though saturation may take
until about 07z across the northwest...went ahead and began
warnings/adv over the northwest. Once the precip begins it will
quickly cause some impacts with some light icing/sleet and a quick
changeover to all snow by 09z as rates pick up over the northwest
for the remainder of the day. Over the northeast rain/freezing
rain will being initially with a changeover taking place nearer
09z to 12z. None the less...morning commutes will be impacted over
most of the north. Farther south a mixture of light icing and
light snow will be possible. Though road temperatures may limit
any road icing along the US Highway corridor north toward US
20...decided to add a row of counties to for chance that some
bridges/overpasses may become slick or briefly ice up in the
morning hours. If impacts lessen during the day Wednesday...this
portion of the advisory may end earlier. This storm has a lot
going for it...possible convection along with strong forcing. Some
uncertainty still remains regarding the amount of qpf and how far
south the storm may still trend which will affect snowfall
amounts. Generally looking for a 6 to 8 inch area of snow north in
the warning areas with 2 to 5 inches in the advisory areas along
with a glazing of ice there. Day shift will need to carefully
evaluate trends and again later tonight. Highs tomorrow will warm
into the mid to upper 30s south of US 30 - at best with
temperatures holding in the lower 30s over the north. With the
snowfall rates quite high...this event will support snow below 35
degrees and likely some compaction will take place but with high
snow:water ratios up to 15 to 17 due to tremendous forcing...
should be able to see more than 6 inches in the warning areas.

.LONG TERM.../Thursday through Monday/
Issued at 332 AM CDT Tue Apr 17 2018

Finally some quiet and spring-like weather in store through the
weekend and into the early part of next week. The main focus of
the extended was on a another upper level low to pass to the
south of the state Friday night into Saturday. Models continue to
shift this system south from run to run and confidence is
increasing with the better chances of remaining dry across much of
the forecast area. Hence the good news, no major winter storm for
the weekend for central Iowa and much of the forecast area looks
to be near or even slightly above normal Saturday and Sunday.

Thursday through Saturday...Surface high pressure builds into the
region and becomes centered over Iowa b/t 03-09z Friday. There is
plenty of dry and cool air with this airmass and expecting a good
radiational cooling set up by Friday morning. Record or near record
lows are likely, especially over the northern half of the forecast
area with the anticipated fresh snow pack in place.  Something to
mention in forecast after Wednesday's system. The strong surface
high shifts to the Great Lakes area and looks to keep the next 500mb
low tracking across Arkansas and Missouri. Ahead of the low, a weak
ribbon of vorticity provides enough forcing to keep the mention of
rain and snow going Friday night into Saturday. Soundings suggest
either rain or snow during the day Saturday with ice introduction
present, but there remains a deep layer of dry air to contend
with below 800mb to the surface. Thus, QPF and any snow amounts
look to be light attm.

Sunday into Tuesday...GFS and ECMWF have come into agreement with
warmer temperatures by Sunday and tweaked highs up slightly and may
need to continue to trend warmer if models persist with this signal.
Only caveat is some mid-level clouds across the state. Certainly
Monday and Tuesday are forecast to be around normal with highs
rising into the upper 50s to 60s, but with the latest MOS guidance
from the ECMWF and GFS, highs looks to be even warmer.

&&

.AVIATION.../For the 18Z TAFS through 18Z Tuesday afternoon/
Issued at 1204 AM CDT Tue Apr 17 2018

VFR conditions are in place across the forecast area and are pretty
much expected to remain so through the entire period. The only
concern would be brief MVFR radiation fog toward daybreak at all
sites except KDSM. Precip may also approach KFOD late in the period,
but chances and confidence are not there for inclusion at the
moment, more likely with 12z issuance and later.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory from 4 AM Wednesday to 1 AM CDT Thursday
for IAZ036>039-047>050.

Winter Storm Warning from 1 AM to 10 PM CDT Wednesday for IAZ004-
005-015-024.

Winter Storm Warning from 4 AM Wednesday to 1 AM CDT Thursday
for IAZ006-007-016-017-025>028.

Winter Weather Advisory from 1 AM to 10 PM CDT Wednesday for
IAZ023-033>035-044>046.

&&

SHORT TERM...REV
LONG TERM...Podrazik
AVIATION...Small
Hazardous weather outlook, Apr 16, 4:04 AM CDT, 23 hours 50 minutes before
Hazardous Weather Outlook
National Weather Service Des Moines IA
404 AM CDT Mon Apr 16 2018

IAZ004>007-015>017-023>028-170915-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-
404 AM CDT Mon Apr 16 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

A few rivers over northern Iowa have risen or may rise to near
flood stage from today into the middle of the week. River flood
warnings for minor flooding are currently in effect for the West
Fork of the Des Moines River at Estherville.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

A Winter Storm Watch is in effect for the area Tuesday night
through Wednesday evening. Please refer to the National Weather
Service website at weather.gov/desmoines for further details.

A few rivers over northern Iowa have risen or may rise to near
flood stage from today into the middle of the week. River flood
warnings for minor flooding are currently in effect for the West
Fork of the Des Moines River at Estherville.

.SPOTTER INFORMATION STATEMENT...

Spotters activation is not needed at this time. Snowfall and ice
reports Wednesday would be appreciated.

IAZ033>039-170915-
Sac-Calhoun-Webster-Hamilton-Hardin-Grundy-Black Hawk-
404 AM CDT Mon Apr 16 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

A few rivers over northern Iowa have risen or may rise to near
flood stage from today into the middle of the week. River flood
warnings for minor flooding are currently in effect for the Cedar
River in Cedar Falls.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Additional snow or a wintry mix may fall over the area Wednesday
with potential for accumulating snow with light snow and some ice
accumulations possible at some locations.

.SPOTTER INFORMATION STATEMENT...

Spotters activation is not needed at this time. Snowfall and ice
reports Wednesday would be appreciated.

IAZ044>050-057>062-070>075-081>086-092>097-170915-
Crawford-Carroll-Greene-Boone-Story-Marshall-Tama-Audubon-Guthrie-
Dallas-Polk-Jasper-Poweshiek-Cass-Adair-Madison-Warren-Marion-
Mahaska-Adams-Union-Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-
Decatur-Wayne-Appanoose-Davis-
404 AM CDT Mon Apr 16 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Gusty west northwest winds are possible over southern Iowa Wednesday
with sustained speeds of 30 mph or more and higher gusts.

.SPOTTER INFORMATION STATEMENT...

Spotters will not be needed.

REV

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 17, 3:54 AM CDTWinter Weather AdvisoryDMXAudubon, Black Hawk, Boone, Bremer, Butler, Calhoun and 25 more42 hr

Nearby

Winter Storm Warnings in Iowa, 2018Every winter storm warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.