Alert archive / Iowa / Winter Storm Warnings in 2018

Winter Storm Warning 6, NWS Des Moines, IA

April 2, 20187 counties in Iowa

NWS Des Moines, IA issued this winter storm warning at Apr 2, 2018, 2:00 PM CDT for 7 counties in Iowa. It took effect at Apr 3, 2018, 4:00 AM CDT. It was in force for 21 hr. 12 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 2, 2018, 2:00 PM CDT (19:00 UTC)
In effect from
Apr 3, 2018, 4:00 AM CDT
Expired
Apr 4, 2018, 1:00 AM CDT
In force
21 hr
Issued by
NWS Des Moines, IA

Counties Cerro Gordo County, IA, Emmet County, IA, Hancock County, IA, Kossuth County, IA, Palo Alto County, IA, Winnebago County, IA, Worth County, IA

The radar

The Des Moines radar (KDMX), 167 km from the middle of the area, began a volume at 18:59 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 3, 10:59 AM CDTSNOW 4.11 Ssw Algona, IA
Apr 3, 11:38 AM CDTSNOW 2.51 Nnw Clear Lake, IA
Apr 3, 1:16 PM CDTSNOW 31 Nnw Clear Lake, IA
Apr 3, 3:00 PM CDTSNOW 3.8Clear Lake, IAREPORT VIA SOCIAL MEDIA.
Apr 3, 5:42 PM CDTSNOW 31 Nnw Clear Lake, IA
Apr 3, 5:58 PM CDTSNOW 65 W Fertile, IA
Apr 3, 6:03 PM CDTSNOW 3Mason City, IA
Apr 3, 6:52 PM CDTSNOW 81 N Ledyard, IAVIA TWITTER.
Apr 3, 7:25 PM CDTSNOW 4.5Wesley, IASOCIAL MEDIA.
Apr 3, 7:53 PM CDTSNOW 3Estherville, IASOCIAL MEDIA.
Apr 3, 8:25 PM CDTSNOW 4.8Mason City, IASOCIAL MEDIA.
Apr 3, 8:28 PM CDTSNOW 6Emmetsburg, IASOCIAL MEDIA.

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 12:00Z, 7.0 hours before the alert went out and 183 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 12:00Z on 2018-04-02Temperature 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 12:00Z on 2018-04-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 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
1430 m above ground
0-6 km bulk shear
83 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
268 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

336 
WWUS43 KDMX 021900
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
200 PM CDT Mon Apr 2 2018

...Late Season Winter Storm Tonight into Tuesday...

.Snow will develop across northern Iowa tonight. The snow
may become heavy at times late tonight into the day on 
Tuesday, especially across far northern Iowa. Further south, 
a wintry mix of snow, sleet, or freezing rain is expected. 
Total snowfall amounts will range from 6 to 8 inches near the
Iowa/Minnesota border to 2 to 4 inches along the US Highway 20 
corridor.

Strong and gusty northwest winds will also develop with wind
gusts over 40 mph possible by Tuesday afternoon. These winds will 
cause areas of blowing snow and hazardous driving conditions.


IAZ004>007-015>017-030300-
/O.UPG.KDMX.WS.A.0006.180403T0600Z-180404T0300Z/
/O.NEW.KDMX.WS.W.0006.180403T0600Z-180404T0600Z/
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Including the cities of Estherville, Algona, Forest City, 
Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha,
Mason City, and Clear Lake
200 PM CDT Mon Apr 2 2018

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

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 8
  inches, heaviest amounts near the Iowa/Minnesota border, with a
  light glaze of ice possible.

* WHERE...Far northern Iowa.

* WHEN...From 1 AM Tuesday to 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the evening commute on Tuesday. 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>028-033>039-030300-
/O.NEW.KDMX.WW.Y.0018.180403T0600Z-180404T0600Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, 
Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison,
Dumont, Waverly, Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Fort Dodge, Webster City, Iowa Falls, Eldora, Ackley, 
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
and Cedar Falls
200 PM CDT Mon Apr 2 2018

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

* WHAT...Mixed precipitation expected. Total snow accumulations of
  2 to 4 inches, with localized amounts up to 5 inches, and ice a
  light glaze of possible.
  

* WHERE...North-central Iowa.

* WHEN...From 1 AM Tuesday to 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the evening commute on Tuesday. 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
10 follow-up statements
576 
WWUS43 KDMX 030227
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
927 PM CDT Mon Apr 2 2018

...Late Season Winter Storm Tonight into Tuesday...

.Snow will develop across northern Iowa late tonight. The snow 
may become heavy at times with visibilities reduced to around 
1/2 mile or less, during the daylight hours Tuesday, especially 
across far northern Iowa. Further south, a wintry mix of snow, 
sleet, or freezing rain is expected. Total snowfall amounts will 
range from 6 to 8 inches near the Iowa/Minnesota border to 2 to 4 
inches along the US Highway 20 corridor.

Strong and gusty northwest winds will also develop with wind
gusts over 40 mph possible by Tuesday afternoon. These winds will
cause areas of blowing snow and hazardous driving conditions.

IAZ004>007-015>017-031030-
/O.CON.KDMX.WS.W.0006.180403T0600Z-180404T0600Z/
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Including the cities of Estherville, Algona, Forest City, 
Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha,
Mason City, and Clear Lake
927 PM CDT Mon Apr 2 2018

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

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 8 
  inches, heaviest amounts near the Iowa/Minnesota border, with 
  a light glaze of ice possible.

* WHERE...Far northern Iowa.

* WHEN...From 1 AM Tuesday to 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the morning and evening commutes on Tuesday. 
  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.

&&

$$

IAZ023>028-033>039-031030-
/O.CON.KDMX.WW.Y.0018.180403T0600Z-180404T0600Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, 
Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison,
Dumont, Waverly, Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Fort Dodge, Webster City, Iowa Falls, Eldora, Ackley, 
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
and Cedar Falls
927 PM CDT Mon Apr 2 2018

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

* WHAT...Mixed precipitation expected. Total snow accumulations of
  2 to 4 inches, with localized amounts up to 5 inches, and a light
  glaze of ice possible.

* WHERE...Northern portions of central Iowa.

* WHEN...From 1 AM Tuesday to 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the evening commute on Tuesday. 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
902 
WWUS43 KDMX 030448
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
1148 PM CDT Mon Apr 2 2018

...Late Season Winter Storm Late Tonight into Tuesday...

.Snow will develop across northern Iowa through the early morning
hours Tuesday and persist through the day. The snow may become 
heavy at times with visibilities reduced to around 1/2 mile or 
less, during the daylight hours Tuesday, especially across far 
northern Iowa. Further south, a wintry mix of snow, sleet, or 
freezing rain is expected. Total snowfall amounts will range from 
6 to 8 inches near the Iowa/Minnesota border to 2 to 4 inches 
along the US Highway 20 corridor.

Strong and gusty northwest winds will also develop with wind
gusts over 40 mph possible by Tuesday afternoon. These winds will
cause areas of blowing snow and hazardous driving conditions.

IAZ004>007-015>017-031300-
/O.EXT.KDMX.WS.W.0006.180403T0900Z-180404T0600Z/
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Including the cities of Estherville, Algona, Forest City, 
Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha,
Mason City, and Clear Lake
1148 PM CDT Mon Apr 2 2018

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

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 8 
  inches, heaviest amounts near the Iowa/Minnesota border, with 
  a light glaze of ice possible.

* WHERE...Far northern Iowa.

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

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning and evening commutes on Tuesday. 
  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.

&&

$$

IAZ023>028-033>039-031300-
/O.EXT.KDMX.WW.Y.0018.180403T0900Z-180404T0600Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, 
Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison,
Dumont, Waverly, Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Fort Dodge, Webster City, Iowa Falls, Eldora, Ackley, 
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
and Cedar Falls
1148 PM CDT Mon Apr 2 2018

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

* WHAT...Mixed precipitation expected. Total snow accumulations 
  of 2 to 4 inches, with localized amounts up to 5 inches, and a 
  light glaze of ice possible.

* WHERE...Northern portions of central Iowa.

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

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the morning and evening commutes on Tuesday. 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
638 
WWUS43 KDMX 030913
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
413 AM CDT Tue Apr 3 2018

...Late Season Winter Storm Late Tonight into Tuesday...

.Snow will continue to move across northwest Iowa through the 
early morning hours before spreading eastward through the day. 
The snow may become heavy at times with visibilities reduced to 
around 1/2 mile or less across far northern Iowa. Further south, 
a wintry mix of snow, sleet, or freezing rain is expected. Total 
snowfall amounts will range from 4 to 7 inches near the 
Iowa/Minnesota border to 2 to 4 inches along the US Highway 20 
corridor.

Strong and gusty northwest winds will also develop by this
afternoon with wind gusts over 40 mph possible. These winds will 
cause areas of blowing snow and hazardous driving conditions.

IAZ004>007-015>017-031715-
/O.CON.KDMX.WS.W.0006.000000T0000Z-180404T0600Z/
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Including the cities of Estherville, Algona, Forest City, 
Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha,
Mason City, and Clear Lake
413 AM CDT Tue Apr 3 2018

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

* WHAT...Moderate to heavy snow expected. Total snow 
  accumulations of 4 to 7 inches, heaviest amounts near the 
  Iowa/Minnesota border. A light glaze of ice is possible.

* WHERE...Far northern Iowa.

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

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning and evening commutes on Tuesday. 
  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.

&&

$$

IAZ044-045-031715-
/O.EXA.KDMX.WW.Y.0018.000000T0000Z-180404T0600Z/
Crawford-Carroll-
Including the cities of Denison and Carroll
413 AM CDT Tue Apr 3 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 1 AM CDT WEDNESDAY...

* WHAT...Mixed precipitation including snow expected. Total snow
  accumulations of 1 to 3 inches. Light ice accumulations may
  occur. 

* WHERE...Portions of west central Iowa.

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

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the morning and evening commutes on Tuesday. 
  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.

&&

$$

IAZ023>028-033>039-031715-
/O.CON.KDMX.WW.Y.0018.000000T0000Z-180404T0600Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, 
Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison,
Dumont, Waverly, Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Fort Dodge, Webster City, Iowa Falls, Eldora, Ackley, 
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
and Cedar Falls
413 AM CDT Tue Apr 3 2018

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

* WHAT...Snow expected but mixed precipitation may occur. Total 
  snow accumulations of 2 to 4 inches, with localized amounts up 
  to 5 inches. A light glaze of ice is possible.

* WHERE...Northern portions of central Iowa.

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

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the morning and evening commutes on Tuesday. 
  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
921 
WWUS43 KDMX 031226
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
726 AM CDT Tue Apr 3 2018

...Winter Storm to Impact Iowa Today..

.Snow over northwest and north central will expand east this
morning. The snow may become heavy at times with visibilities 
reduced to around 1/2 mile or less across far northern Iowa. 
Further south, a wintry mix of snow and freezing drizzle is 
expected. Total snowfall amounts will range from 4 to 7 inches 
near the Iowa/Minnesota border to 2 to 4 inches along the US 
Highway 20 corridor.

Strong and gusty northwest winds will also develop by this
afternoon with wind gusts over 40 mph possible. These winds will
cause areas of blowing snow and hazardous driving conditions.

IAZ004>007-015>017-032030-
/O.CON.KDMX.WS.W.0006.000000T0000Z-180404T0600Z/
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Including the cities of Estherville, Algona, Forest City, 
Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha,
Mason City, and Clear Lake
726 AM CDT Tue Apr 3 2018

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

* WHAT...Moderate to heavy snow expected. Total snow 
  accumulations of 4 to 7 inches, heaviest amounts near the 
  Iowa/Minnesota border. A light glaze of ice is possible.

* WHERE...Far northern Iowa.

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

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning and evening commutes on Tuesday. 
  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.

&&

$$

IAZ023>028-033>039-044-045-032030-
/O.CON.KDMX.WW.Y.0018.000000T0000Z-180404T0600Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, 
Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison,
Dumont, Waverly, Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Fort Dodge, Webster City, Iowa Falls, Eldora, Ackley, 
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
Cedar Falls, Denison, and Carroll
726 AM CDT Tue Apr 3 2018

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

* WHAT...Snow expected but mixed precipitation may occur. Total 
  snow accumulations of 2 to 4 inches, with localized amounts up 
  to 5 inches. A light glaze of ice is possible.

* WHERE...Northern portions of central Iowa.

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

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the morning and evening commutes on Tuesday. 
  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
072 
WWUS43 KDMX 031509
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
1009 AM CDT Tue Apr 3 2018

...Winter Storm to Impact Iowa Today..

.Snow over northwest and north central Iowa continues to expand 
south and east late this morning and into the early afternoon. The
snow is heavy at times with visibilities reduced to around 1/2 
mile or less across far northern Iowa and portions of west central
Iowa. Further south, a wintry mix of snow and freezing drizzle is
expected before switching to all snow. Total snowfall amounts 
will range from 4 to 7 inches near the Iowa/Minnesota border to 2 
to 4 inches along the US Highway 20 corridor. Up to an inch 
possible around the Ames to Des Moines Metro areas. 

Strong and gusty northwest winds are expected to develop this 
afternoon when gusts over 40 mph are possible. These winds will 
cause areas of blowing snow and hazardous driving conditions.

IAZ004>007-015>017-032315-
/O.CON.KDMX.WS.W.0006.000000T0000Z-180404T0600Z/
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Including the cities of Estherville, Algona, Forest City, 
Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha,
Mason City, and Clear Lake
1009 AM CDT Tue Apr 3 2018

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

* WHAT...Heavy snow. Additional snow accumulations of 3 to 6
  inches are expected. Strong northwest winds of 20 to 30 mph with
  gusts near 40 mph are anticipated this afternoon into the
  evening producing some blowing snow and reduced visibility. 

* WHERE...Far northern Iowa.

* WHEN...Until 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions through
  the late afternoon. 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.

&&

$$

IAZ046>050-057>062-070-071-032315-
/O.EXA.KDMX.WW.Y.0018.000000T0000Z-180404T0600Z/
Greene-Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-
Jasper-Poweshiek-Cass-Adair-
Including the cities of Jefferson, Boone, Ames, Marshalltown, 
Tama, Toledo, Traer, Dysart, Gladbrook, Audubon, Exira, 
Guthrie Center, Panora, Bayard, Casey, Perry, Waukee, Adel, 
Des Moines, Newton, Grinnell, Atlantic, Greenfield, Stuart, 
Adair, and Fontanelle
1009 AM CDT Tue Apr 3 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 1 AM CDT WEDNESDAY...

* WHAT...Mixed precipitation. Up to an inch of snow is possible.
  With the burst of snow anticipated along with the strong
  northwest winds developing late this morning into the afternoon
  hours, some visibility restrictions are expected. This is 
  likely to impact the evening commute. 

* WHERE...Central Iowa.

* WHEN...Until 1 AM CDT Wednesday.

* 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.

&&

$$

IAZ023>028-033>039-044-045-032315-
/O.CON.KDMX.WW.Y.0018.000000T0000Z-180404T0600Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, 
Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison,
Dumont, Waverly, Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Fort Dodge, Webster City, Iowa Falls, Eldora, Ackley, 
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
Cedar Falls, Denison, and Carroll
1009 AM CDT Tue Apr 3 2018

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

* WHAT...Mainly snow and potentially blowing snow resulting in
  visibility restrictions. An additional snow accumulations of 1 
  to 3 inches. Strong northwest winds are forecast to develop this
  afternoon and evening, with gusts near 40 mph possible.

* WHERE...Northern portions of central Iowa.

* WHEN...Until 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on snow covered and slick road 
  conditions, including during the evening commute. Expect reduced
  visibilities at times when the blustery northwest winds develop
  later today. 

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.

&&

$$

Podrazik

For more information from the National Weather Service visit
http://weather.gov/desmoines
929 
WWUS43 KDMX 031814
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
114 PM CDT Tue Apr 3 2018

...Winter Storm to Impact Iowa Today..

.A band of moderate to locally heavy snow located over central to
northeast portions of the headlined area will continue to move
east. A brief break in the snow over western to northern Iowa
before another snow band moves in later this afternoon. With the
secondary snow band, gusty winds are likely to increase and lead
to visibility restrictions as low as one half mile at times. The
blowing snow and reduced visibility conditions are anticipated to
impact the evening commute.

IAZ004>007-015>017-040215-
/O.CON.KDMX.WS.W.0006.000000T0000Z-180404T0600Z/
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Including the cities of Estherville, Algona, Forest City, 
Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha,
Mason City, and Clear Lake
114 PM CDT Tue Apr 3 2018

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

* WHAT...Heavy snow. Additional snow accumulations of 3 to 5
  inches are expected. Strong northwest winds of 20 to 30 mph with 
  gusts near 40 mph are anticipated late this afternoon into the 
  evening producing some blowing snow and reduced visibility. 

* WHERE...Far northern Iowa.

* WHEN...Until 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions into
  this evening, especially during the rush hour 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.

&&

$$

IAZ023>028-033>039-044>050-057>062-070-071-040215-
/O.CON.KDMX.WW.Y.0018.000000T0000Z-180404T0600Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, 
Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison,
Dumont, Waverly, Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Fort Dodge, Webster City, Iowa Falls, Eldora, Ackley, 
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
Cedar Falls, Denison, Carroll, Jefferson, Boone, Ames, 
Marshalltown, Tama, Toledo, Traer, Dysart, Gladbrook, Audubon, 
Exira, Guthrie Center, Panora, Bayard, Casey, Perry, Waukee, 
Adel, Des Moines, Newton, Grinnell, Atlantic, Greenfield, Stuart,
Adair, and Fontanelle
114 PM CDT Tue Apr 3 2018

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

* WHAT...Snow and potentially blowing snow resulting in visibility
  restrictions. Additional snow accumulations of 1 to 3 inches, 
  with the higher amounts along Highway 20 corridor northward.

* WHERE...Central Iowa.

* WHEN...Until 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the evening commute. Expect reduced visibilities at times
  due to the strong northwest winds developing later this
  afternoon into the evening.

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.

&&

$$

Podrazik

For more information from the National Weather Service visit
http://weather.gov/desmoines
425 
WWUS43 KDMX 032222
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
522 PM CDT Tue Apr 3 2018

...Winter Storm Continues this Evening for Northern Iowa..

.An area of moderate to locally heavy snow continues to move 
through eastern portions of north central Iowa. Visibilities have 
dropped to around 1 mile or less within this area of snow.
Northwest winds will continue to become strong and gusty across
north central Iowa this evening. The combination of lingering
snowfall and gusty winds will allow visibility restrictions to
drop to as low as one half mile or less at times. The blowing 
snow and reduced visibility conditions are expected to continue
through the mid evening hours. As light snow tapers off by mid to
late evening, some blowing and drifting snow is still expected,
however visibility restrictions are expected to improve some
toward late evening. 

IAZ004>007-015>017-040600-
/O.CON.KDMX.WS.W.0006.000000T0000Z-180404T0600Z/
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Including the cities of Estherville, Algona, Forest City, 
Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha,
Mason City, and Clear Lake
522 PM CDT Tue Apr 3 2018

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

* WHAT...Snow. Additional snow accumulations of 1 to 2 inches are
  expected through mid to late evening. Strong northwest winds of
  20 to 30 mph with gusts near 40 mph will continue to produce 
  some blowing and drifting snow and reduced visibility.

* WHERE...Far northern Iowa.

* WHEN...Until 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions into 
  this evening, especially during the rush hour 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.

&&

$$

IAZ023>028-033>039-044>050-057>062-070-071-040600-
/O.CON.KDMX.WW.Y.0018.000000T0000Z-180404T0600Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, 
Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison,
Dumont, Waverly, Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Fort Dodge, Webster City, Iowa Falls, Eldora, Ackley, 
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
Cedar Falls, Denison, Carroll, Jefferson, Boone, Ames, 
Marshalltown, Tama, Toledo, Traer, Dysart, Gladbrook, Audubon, 
Exira, Guthrie Center, Panora, Bayard, Casey, Perry, Waukee, 
Adel, Des Moines, Newton, Grinnell, Atlantic, Greenfield, Stuart,
Adair, and Fontanelle
522 PM CDT Tue Apr 3 2018

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

* WHAT...Snow and potentially blowing snow resulting in visibility
  restrictions. Additional snow accumulations of around a dusting
  along the Interstate 80 corridor to as much as 1 to 2 inches
  along the Highway 20 corridor northward.

* WHERE...Central Iowa.

* WHEN...Until 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the evening commute. Expect reduced visibilities mainly 
  along the Highway 20 corridor at times due to the strong 
  northwest winds and the potential for blowing and drifting snow.
  
  

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
153 
WWUS43 KDMX 040021
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
721 PM CDT Tue Apr 3 2018

...Winter Storm Continues this Evening for Northern Iowa..

.Light snow will taper off through the mid to late evening hours
across northern Iowa. However strong and gusty northwest winds
will continue to increase through the evening allowing for areas
of blowing and drifting snow especially in rural, open areas.
Visibilities may be reduced to around one half mile of less at
times with the light snow and blowing snow. Drifting snow across
roadways will cause slick spots. 

IAZ044>048-057>062-070-071-040130-
/O.CAN.KDMX.WW.Y.0018.000000T0000Z-180404T0600Z/
Crawford-Carroll-Greene-Boone-Story-Audubon-Guthrie-Dallas-Polk-
Jasper-Poweshiek-Cass-Adair-
Including the cities of Denison, Carroll, Jefferson, Boone, Ames,
Audubon, Exira, Guthrie Center, Panora, Bayard, Casey, Perry, 
Waukee, Adel, Des Moines, Newton, Grinnell, Atlantic, Greenfield,
Stuart, Adair, and Fontanelle
721 PM CDT Tue Apr 3 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

Very light snow continues in eastern portions of central Iowa with
and is expected to taper off through the next hour or so. Little
visibility restrictions and no accumulation is expected. Snow has
ended across the central and western portions of central Iowa. 
Therefore the advisory has been cancelled. A few flurries may 
still be possible through the next few hours. 

$$

IAZ004>007-015>017-040600-
/O.CON.KDMX.WS.W.0006.000000T0000Z-180404T0600Z/
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Including the cities of Estherville, Algona, Forest City, 
Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha,
Mason City, and Clear Lake
721 PM CDT Tue Apr 3 2018

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

* WHAT...Light snow and blowing, drifting snow. Little or no
  additional snow accumulations are expected, however strong
  northwest winds of 25 to 35 mph with gusts 45 mph will continue
  to produce some blowing and drifting snow and reduced visibility
  to around one half mile at times.

* WHERE...Far northern Iowa.

* WHEN...Until 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions this
  evening. Expect significant reductions in visibility, especially
  in rural, open areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow and blowing 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.

&&

$$

IAZ023>028-033>039-049-050-040600-
/O.CON.KDMX.WW.Y.0018.000000T0000Z-180404T0600Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Marshall-Tama-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, 
Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison,
Dumont, Waverly, Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Fort Dodge, Webster City, Iowa Falls, Eldora, Ackley, 
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
Cedar Falls, Marshalltown, Tama, Toledo, Traer, Dysart, 
and Gladbrook
721 PM CDT Tue Apr 3 2018

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

* WHAT...Light snow and areas of blowing, drifting snow. Any
  additional accumulations will be around an inch or less.
  Visibility restrictions down to one half mile or less can be
  expected in rural, open areas. 

* WHERE...Central Iowa.

* WHEN...Until 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on slippery road conditions from
  drifting snow. Expect significant visibility restrictions,
  especially in rural, open areas. 
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow and blowing snow means periods
of snow and blowing 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
218 
WWUS43 KDMX 040355
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
1055 PM CDT Tue Apr 3 2018

...Winter Storm Winding Down Late this Evening..

.Some light flurries remain across the area and will continue
through midnight before tapering off completely. Strong and gusty
northwest winds continue to produce areas of blowing and drifting
snow. Visibility restrictions down to 1 to 2 miles at times are 
still expected into the early morning hours, especially in the
rural, open areas.

IAZ004>007-015>017-040600-
/O.CON.KDMX.WS.W.0006.000000T0000Z-180404T0600Z/
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Including the cities of Estherville, Algona, Forest City, 
Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha,
Mason City, and Clear Lake
1055 PM CDT Tue Apr 3 2018

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

* WHAT...Flurries and areas of blowing and drifting snow.
  Visibilities down to 1 to 2 miles at times, and slick roads can
  be expected. 

* WHERE...Far northern Iowa.

* WHEN...Until 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions due to
  blowing and drifting snow.
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow and blowing 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.

&&

$$

IAZ023>028-033>039-049-050-040600-
/O.CON.KDMX.WW.Y.0018.000000T0000Z-180404T0600Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Marshall-Tama-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, 
Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison,
Dumont, Waverly, Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Fort Dodge, Webster City, Iowa Falls, Eldora, Ackley, 
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
Cedar Falls, Marshalltown, Tama, Toledo, Traer, Dysart, 
and Gladbrook
1055 PM CDT Tue Apr 3 2018

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

* WHAT...Flurries and areas of blowing and drifting snow.
  Visibilities down to 1 to 2 miles at times, and slick roads can
  be expected.

* WHERE...Central Iowa.

* WHEN...Until 1 AM CDT Wednesday.

* ADDITIONAL DETAILS...Plan on slippery road conditions from
  drifting snow. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow and blowing snow means periods
of snow and blowing 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
759 
WWUS43 KDMX 040554
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
1254 AM CDT Wed Apr 4 2018

...Accumulating Snow Ending Across the Area...

IAZ004>007-015>017-040700-
/O.EXP.KDMX.WS.W.0006.000000T0000Z-180404T0600Z/
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Including the cities of Estherville, Algona, Forest City, 
Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha,
Mason City, and Clear Lake
1254 AM CDT Wed Apr 4 2018

...WINTER STORM WARNING WILL EXPIRE AT 1 AM CDT EARLY THIS
MORNING...

Snow will continue to end across the area. Icy conditions will
persist as some blowing snow will keep roadways partially snow
covered at times.

$$

IAZ023>028-033>039-049-050-040700-
/O.EXP.KDMX.WW.Y.0018.000000T0000Z-180404T0600Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Marshall-Tama-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, 
Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison,
Dumont, Waverly, Sac City, Lake View, Odebolt, Wall Lake, 
Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, 
Fort Dodge, Webster City, Iowa Falls, Eldora, Ackley, 
Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, 
Cedar Falls, Marshalltown, Tama, Toledo, Traer, Dysart, 
and Gladbrook
1254 AM CDT Wed Apr 4 2018

...WINTER WEATHER ADVISORY WILL EXPIRE AT 1 AM CDT EARLY THIS
MORNING...

Snow is ending across the area. A few icy patches are likely yet
through the night as areas of blowing snow persists.

$$

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 2, 6:43 AM CDT, 7 hours 17 minutes earlier.

Area forecast discussion, Apr 2, 6:43 AM CDT, 7 hours 17 minutes before
Area Forecast Discussion
National Weather Service Des Moines IA
643 AM CDT Mon Apr 2 2018

...Updated for 12z Aviation Discussion...

.SHORT TERM.../Today/
Issued at 409 AM CDT Mon Apr 2 2018

Bottom Line up Front...
Generally quiet, cold weather expected today,
with effectively nil-impact drizzle/flurries possible across the CWA.

Setup...
08z Water vapor imagery continuing to pick up on seemingly
permanent upper low spinning over the Hudson Bay. Meanwhile,
water vapor imagery also picking up on a shortwave dropping into
northern Washington from British Columbia. This will be a synoptic-
scale driver for the winter event mentioned below in the long-
term section. Sfc analysis showing what is probably best-described
as an broad region of height falls coming off the Rockies.
Concurrently, a 1020mb sfc high has slid over southeastern Iowa.
Where there has been snow from earlier today, temperatures have
plummeted. Centerville has dropped to 14 degrees, where Ottumwa,
not much more than 25 miles north and snow-free, was measuring 21
degrees.

Precipitation...
For today, The conglomerate region of height falls
slowly organizes as the upper low in the Pacific NW races rapidly
eastward. By 00z Tue, models in good agreement with consolidating to
a single sfc low which should be entering western Kansas at that
time. Prior to consolidation, a northern cyclone, picked up on
the 950mb height field, will be positioned over northwestern
Nebraska. Attendant to this low, will be a very weak boundary that
extends eastward and more or less drapes along the Iowa Minnesota
border. With this cyclonic feature weakening throughout the day,
the boundary never becomes very well-established, with minimal
low-level frontogenetical forcing. Forecast soundings show cloud
thicknesses of 4000 to 5000ft, which is sufficient for drizzle.
Sfc dewpoint depressions are around 10 degrees, which is not
great. Dry air continues from the sfc to around 2000ft. So in all,
have flurries/drizzle/sprinkles going today, with transition to
more measurable precip towards tonight.

Temperatures...
850mb temperatures go from -8C to -12C at 12z
yesterday, to around -3C to -7C at 12z today. Satellite imagery
picking up on blanket of mid-level clouds currently over Nebraska
that will rapidly begin to cover Iowa through this morning. So
although WAA in place this afternoon, temperatures will only be
around 5 or so degrees warmer today than yesterday. These
temperatures are around 15 to 20 degrees below normal for this time
of year.

.LONG TERM.../Tonight through Sunday/
Issued at 409 AM CDT Mon Apr 2 2018

A potent PV anomaly that is just moving into the Pacific Northwest
early this morning, will race over the next 24 hrs and be over
Nebraska by 12z Tue. The surface low that will develop today over
eastern Colorado in response to the upper level system, will move
east across Kansas overnight. This low along with a large high
pressure system along the Atlantic coast will lead to good
southerly flow off the Gulf. The flow will lift a moisture plume
north with some of this moisture overrunning into Iowa. The
initial result is the potential for fog developing south,
especially in the vicinity of Sunday's snow and possibly some
drizzle as low level profiles saturate as the plume lifts north.
The latest road forecasts suggest road temperatures will remain
at 32 or above for much of the area though can not rule out a few
icy patches on bridges over mainly far northern Iowa. The
precipitation should begin to switch to snow over northern Iowa by
06z and should have a good band of snow develop over northwest
Iowa into southern Minnesota during this time as the mid level
forcing arrives. One inch plus per hour rates are possible during
this time. The forcing weakens during the afternoon however modest
vertical ascent will continue through a descending dendritic
growth zone as cold advection arrives. Additional accumulations
are expected after 18z before ending by the evening. Snowfall
amounts of 4-7 inches are expected generally north of Highway 3
and higher amounts are possible near the Minnesota border.
Snowfall amounts of 2-3 inches may extend as far south as Highway
20. Wind gusts by the afternoon should be strong as the cold
advection increase and the strongest pressure gradient is in
place. Mixed layer winds of 35 to 40 kts are common and certainly
gusts over 40 mph at the surface are possible. These gusts will
create areas of blowing snow and will cause some travel concerns
despite road temperatures near 32. Do not expect Blizzard
conditions with the strongest winds disconnected from the peak
period of snow but will need to continue to monitor the situation.
At this time will be issuing a Winter Storm Watch for far
northern Iowa for the snow and blowing snow potential.

South of Highway 20, some snow accumulations may occur however it
should be lower impact and mostly occurring during the day with
some solar radiation penetrating the clouds and warmer road temps,
should keep roadways in good shape. A few thunderstorms may clip
the far southeast on Tuesday. This area is in the SPC Marginal
Convective Outlook with the biggest threat being marginal severe
sized hail.

The cold advection will sweep across the entire area by late
Tuesday into Tuesday night. Low temperatures in the single digits
are forecast by Wednesday morning. Record low temperatures could
be in jeopardy over the north. The current forecast low at Mason
City is 9 degrees, which would tie the current record last set in
1995. Wind chill values over northern Iowa may dip into the minus
5 to minus 10 degree range!

The forecast remains generally cold through the extended. Thursday
is currently being advertised as the warmest day with some low 50s
reaching southern Iowa. Both the ECMWF and the GFS are not
dropping a strong cold front into Iowa by the afternoon so any
highs will likely be around noon or before. The cold weather
generally continues through the weekend. Maybe a glimmer of hope
into next week as a large upper low drops into the Gulf of Alaska.
This system would force ridging to the east and finally dislodge
the Hudson Bay low and allowing warmer temperatures to finally
arrive.

&&

.AVIATION.../For the 12Z TAFS through 12Z Tuesday morning/
Issued at 636 AM CDT Mon Apr 2 2018

TAFs start today in VFR conditions, deteriorate throughout this
morning and afternoon, and finish the day in IFR or LIFR. CIGs
will be the main driver in lowering categories. Low stratus
spreading across the CWA from south to north. Wintry precip will
be arriving late in the period. This will need to be fine-tuned as
tonight approaches.

Breezy winds nearing 15 kts expected this afternoon and will
diminish this evening. Another day of very strong winds, in the 20
to 30 kt range is expected by late Tuesday afternoon, with wind
increases expected after 12z Tue from west to east.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
Winter Storm Watch from late tonight through Tuesday evening for
IAZ004>007-015>017.

&&

SHORT TERM...Kotenberg
LONG TERM...Donavon
AVIATION...Kotenberg
Hazardous weather outlook, Apr 2, 4:42 AM CDT, 9 hours 18 minutes before
Hazardous Weather Outlook
National Weather Service Des Moines IA
442 AM CDT Mon Apr 2 2018

IAZ004>007-015>017-030945-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
442 AM CDT Mon Apr 2 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

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

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

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

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time however winter
weather reports would be appreciated.

IAZ023>028-033>039-030945-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-
442 AM CDT Mon Apr 2 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

A wintry mix or light snow may develop late tonight and could
create some icy patches.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Light snow or a wintry mix are expected on Tuesday with
accumulations of snow possible. Gusty northwest winds will develop
through the day with gusts over 40 mph possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time however winter
weather reports would be appreciated.

IAZ044>050-057>062-030945-
Crawford-Carroll-Greene-Boone-Story-Marshall-Tama-Audubon-Guthrie-
Dallas-Polk-Jasper-Poweshiek-
442 AM CDT Mon Apr 2 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Patchy fog and areas of drizzle may occur late tonight. A few
icy patches could occur on bridges where temperatures are near
freezing.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Minor snow accumulations are possible on Tuesday though should
have little impact on travel. Gusty northwest winds will develop
through the day with gusts over 40 mph possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

IAZ070>075-081>086-092>097-030945-
Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-Clarke-Lucas-
Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-Appanoose-Davis-
442 AM CDT Mon Apr 2 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Areas of fog are possible tonight and may become locally dense
near the Missouri border.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Isolated thunderstorms are possible Tuesday morning mainly across
the southeast. Dime to nickel sized hail could occur with a few
storms.

Gusty northwest winds will develop on Tuesday with gusts
over 40 mph possible during the afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 2, 4:16 AM CDTWinter Storm WatchDMXCerro Gordo, Emmet, Hancock, Kossuth, Palo Alto, Winnebago and 1 more10 hr
Apr 2, 2:00 PM CDTWinter Weather AdvisoryDMXAdair, Audubon, Black Hawk, Boone, Bremer, Butler and 22 more35 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.