Alert archive / Iowa / Winter Storm Warnings in 2018

Winter Storm Warning 7, NWS Des Moines, IA

April 8, 20187 counties in Iowa

NWS Des Moines, IA issued this winter storm warning at Apr 8, 2018, 3:48 PM CDT for 7 counties in Iowa. It was in force for 12 hr. 16 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 8, 2018, 3:48 PM CDT (20:48 UTC)
Expired
Apr 9, 2018, 3:42 AM CDT
In force
12 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 20:50 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 8, 3:59 PM CDTSNOW 3Algona, IAVIA SOCIAL MEDIA.
Apr 8, 4:05 PM CDTSNOW 5.51 Nnw Clear Lake, IA
Apr 8, 4:18 PM CDTSNOW 6.5Leland, IAVIA SOCIAL MEDIA.
Apr 8, 4:23 PM CDTSNOW 4Garner, IAVIA SOCIAL MEDIA.
Apr 8, 4:30 PM CDTSNOW 4Graettinger, IAVIA SOCIAL MEDIA.
Apr 8, 4:49 PM CDTSNOW 5.51 Ne Mason City, IA
Apr 8, 4:49 PM CDTSNOW 6.51 Nnw Clear Lake, IA
Apr 8, 5:20 PM CDTSNOW 5.5Emmetsburg, IAVIA SOCIAL MEDIA.
Apr 8, 5:40 PM CDTSNOW 71 Nnw Clear Lake, IAVIA SOCIAL MEDIA.
Apr 8, 6:09 PM CDTSNOW 6Mason City, IAVIA SOCIAL MEDIA.
Apr 8, 7:55 PM CDTSNOW 7.5Leland, IAVIA SOCIAL MEDIA.
Apr 8, 8:16 PM CDTSNOW 7Mason City, IAVIA SOCIAL MEDIA.
Apr 8, 8:25 PM CDTSNOW 6Emmetsburg, IAVIA SOCIAL MEDIA.
Apr 8, 8:43 PM CDTSNOW 6Mason City, IAFROM KIMT TV.
Apr 8, 10:46 PM CDTSNOW 7Mason City, IA
Apr 8, 11:53 PM CDTSNOW 5.31 Nnw Forest City, 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 12:00Z, 8.8 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 2018-04-08Temperature 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 2018-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 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
1528 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

537 
WWUS43 KDMX 082048
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
348 PM CDT Sun Apr 8 2018

...Moderate to Locally Heavy Snow across Northern and Central
Possible Through Tonight...

.Moderate to heavy snowfall has occurred over northern Iowa with 3
to 5 inches already being reported. An addition 1 to 4 inches 
could occur over that region. Farther north, expect accumulating 
snow to arrive over central Iowa through the evening as snow drops
south out of South Dakota. The wind will gust to 30 mph at times 
and will create some areas of blowing snow over northern Iowa.

IAZ004>007-015>017-090500-
/O.UPG.KDMX.WW.Y.0019.000000T0000Z-180409T1200Z/
/O.NEW.KDMX.WS.W.0007.180408T2048Z-180409T1200Z/
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
348 PM CDT Sun Apr 8 2018

...WINTER STORM WARNING IN EFFECT UNTIL 7 AM CDT MONDAY...

* WHAT...Heavy snow. Additional snow accumulations of 1 to 4
  inches are expected. Total snowfall 5 to 8 inches. Locally 
  higher amounts may occur. Areas of blowing snow may occur with 
  gusty winds to 30 mph.

* WHERE...North Central Iowa.

* WHEN...Until 7 AM CDT Monday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. 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.

&&

$$

IAZ062-090500-
/O.EXA.KDMX.WW.Y.0019.000000T0000Z-180409T1200Z/
Poweshiek-
Including the city of Grinnell
348 PM CDT Sun Apr 8 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM CDT MONDAY...

* WHAT...Light to Moderate snow. Snow possibly mixing with or
  briefly changing to light freezing rain in the evening. Total
  snow accumulations of 2 to 4 inches possible. A light glaze of 
  ice may also occur. Visibilities may drop below one half mile at
  times during the more intense snow, aided by 25 mph wind gusts.

* WHERE...Poweshiek County.

* WHEN...From 1 PM Sunday to 7 AM CDT Monday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. 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.

&&

$$

IAZ023>028-033>039-046>050-090500-
/O.CON.KDMX.WW.Y.0019.000000T0000Z-180409T1200Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Greene-Boone-Story-
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, Jefferson, Boone, Ames, Marshalltown, Tama, Toledo, 
Traer, Dysart, and Gladbrook
348 PM CDT Sun Apr 8 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT
MONDAY...

* WHAT...Moderate to heavy snow. Snow possibly mixing with or
  briefly changing to light freezing rain in the evening. Total
  snow accumulations of 2 to 6 inches with the highest amounts
  north and lightest south. A light glaze of ice may also occur. 
  Visibilities may drop below one half mile at times during the 
  more intense snow, aided by 25 mph wind gusts.

* WHERE...Northern and Central Iowa.

* WHEN...From 1 PM Sunday to 7 AM CDT Monday.

* 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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/desmoines
4 follow-up statements
348 
WWUS43 KDMX 082358
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
658 PM CDT Sun Apr 8 2018

...Moderate to Locally Heavy Snow across Northern and Central
Possible Through Tonight...

.Moderate to heavy snowfall has occurred over northern Iowa with
3 to 6 inches already being reported. An additional 1 to 3 inches
could occur over that region. The wind will gust to 25 mph at 
times and will create some areas of blowing snow over northern 
Iowa.

IAZ004>007-015>017-090330-
/O.CON.KDMX.WS.W.0007.000000T0000Z-180409T1200Z/
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
658 PM CDT Sun Apr 8 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM CDT 
MONDAY...

* WHAT...Heavy snow. Additional snow accumulations of 1 to 3
  inches are expected. Total snowfall 5 to 8 inches. Snow showers
  may have diminished but another round of snow will cross Iowa-
  Minnesota border later this evening. Locally higher amounts may
  occur. Areas of blowing snow may occur with gusty winds to 25 
  mph.

* WHERE...North Central Iowa.

* WHEN...Until 7 AM CDT Monday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Expect
  significant reductions in visibility at times down to a mile or
  less.

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>039-046>050-062-090330-
/O.CON.KDMX.WW.Y.0019.000000T0000Z-180409T1200Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Greene-Boone-Story-
Marshall-Tama-Poweshiek-
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, Jefferson, Boone, Ames, Marshalltown, Tama, Toledo, 
Traer, Dysart, Gladbrook, and Grinnell
658 PM CDT Sun Apr 8 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT
MONDAY...

* WHAT...Moderate snow. Snow possibly mixing with or briefly
  changing to light freezing rain in the evening. Total snow
  accumulations of 2 to 6 inches with the highest amounts north
  and lightest south. A light glaze of ice may also occur.
  Visibilities may drop to one mile at times during the more 
  intense snow, aided by 25 mph wind gusts.

* WHERE...Northern and Central Iowa.

* WHEN...From 1 PM Sunday to 7 AM CDT Monday.

* ADDITIONAL DETAILS...Plan on slippery road conditions due to ice
  and snow. 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

AK
099 
WWUS43 KDMX 090217
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
917 PM CDT Sun Apr 8 2018

...Moderate to Locally Heavy Snow across Northern and Central
Possible Through Tonight...

.Moderate to heavy snowfall has occurred over northern Iowa with
3 to 6 inches already being reported. An additional 1 to 3 inches
could occur over that region. The wind will gust to 25 mph at
times and will create some areas of blowing snow over northern
Iowa. Freezing drizzle was also producing icy roads over parts of
central and southern Iowa.

IAZ004>007-015>017-091030-
/O.CON.KDMX.WS.W.0007.000000T0000Z-180409T1200Z/
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
917 PM CDT Sun Apr 8 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY...

* WHAT...Heavy snow. Additional snow accumulations of 1 to 3
  inches are expected. Total snowfall 5 to 8 inches. Snow showers
  may have diminished but another round of snow will cross Iowa-
  Minnesota border later this evening. Locally higher amounts may
  occur. Areas of blowing snow may occur with gusty winds to 25 
  mph.

* WHERE...North Central Iowa.

* WHEN...Until 7 AM CDT Monday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Expect
  significant reductions in visibility at times down to a mile or
  less.

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.

&&

$$

IAZ044-045-057>061-070>075-081>086-092>097-091030-
/O.EXA.KDMX.WW.Y.0019.000000T0000Z-180409T1200Z/
Crawford-Carroll-Audubon-Guthrie-Dallas-Polk-Jasper-Cass-Adair-
Madison-Warren-Marion-Mahaska-Adams-Union-Clarke-Lucas-Monroe-
Wapello-Taylor-Ringgold-Decatur-Wayne-Appanoose-Davis-
Including the cities of Denison, Carroll, Audubon, Exira, 
Guthrie Center, Panora, Bayard, Casey, Perry, Waukee, Adel, 
Des Moines, Newton, Atlantic, Greenfield, Stuart, Adair, 
Fontanelle, Winterset, Earlham, Indianola, Norwalk, Carlisle, 
Pella, Knoxville, Oskaloosa, Corning, Creston, Osceola, Chariton,
Albia, Ottumwa, Bedford, Lenox, New Market, Mount Ayr, Lamoni, 
Leon, Corydon, Seymour, Allerton, Humeston, Centerville, 
and Bloomfield
917 PM CDT Sun Apr 8 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM CDT MONDAY...

* WHAT...Freezing drizzle initially and mixed with light snow. 
  Additional snow accumulations of up to an inch or so and ice 
  accumulations less than a tenth of an inch are expected.

* WHERE...Northern and Central Iowa

* WHEN...Until 7 AM CDT Monday.

* ADDITIONAL DETAILS...The snow and ice will result in difficult
  travel conditions with icy and slick roads, especially in
  untreated and elevated locations. Multiple car accidents have 
  already been reported in Des Moines.

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>039-046>050-062-091030-
/O.CON.KDMX.WW.Y.0019.000000T0000Z-180409T1200Z/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Greene-Boone-Story-
Marshall-Tama-Poweshiek-
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, Jefferson, Boone, Ames, Marshalltown, Tama, Toledo, 
Traer, Dysart, Gladbrook, and Grinnell
917 PM CDT Sun Apr 8 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT
MONDAY...

* WHAT...Freezing drizzle and light snow. Additional snow 
  accumulations of up to 2 inches and ice accumulations of a light
  glaze are expected.

* WHERE...Northern and Central Iowa.

* WHEN...Until 7 AM CDT Monday.

* ADDITIONAL DETAILS...Plan on slippery and at times icy 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.

&&

$$

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

Small
899 
WWUS43 KDMX 090458
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
1158 PM CDT Sun Apr 8 2018

...Moderate Snow across Northern and Central Possible Through 
Tonight...

.Moderate to locally heavy snowfall has occurred over northern 
Iowa with 3 to 7 inches already being reported. An additional inch
could occur over that region. Freezing drizzle was also producing
icy roads over parts of central and southern Iowa.

IAZ004>007-015>017-090900-
/O.CON.KDMX.WS.W.0007.000000T0000Z-180409T1200Z/
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
1158 PM CDT Sun Apr 8 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY...

* WHAT...Heavy snow. Additional snow accumulations of up to one
  inch are expected with a storm total of 5 to 7 inches and
  locally higher amounts possible.

* WHERE...North Central Iowa.

* WHEN...Until 7 AM CDT Monday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. 
  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>075-081>086-092>097-090900-
/O.CON.KDMX.WW.Y.0019.000000T0000Z-180409T1200Z/
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-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-
Appanoose-Davis-
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, Fontanelle, Winterset, Earlham, Indianola, Norwalk, 
Carlisle, Pella, Knoxville, Oskaloosa, Corning, Creston, Osceola,
Chariton, Albia, Ottumwa, Bedford, Lenox, New Market, Mount Ayr, 
Lamoni, Leon, Corydon, Seymour, Allerton, Humeston, Centerville, 
and Bloomfield
1158 PM CDT Sun Apr 8 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT
MONDAY...

* WHAT...Mixed precipitation. Additional snow accumulations of up
  to one inch and ice accumulations of less than one tenth are 
  expected.

* WHERE...Northern and Central Iowa.

* WHEN...Until 7 AM CDT Monday.

* ADDITIONAL DETAILS...The snow and ice will result in difficult
  travel conditions, especially on bridges and elevated surfaces. 
  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

AK
412 
WWUS43 KDMX 090842
WSWDMX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Des Moines IA
342 AM CDT Mon Apr 9 2018

.Precipitation will gradually wind down across central Iowa this
morning. Most of any additional snow or glazing will occur along
and east of Interstate 35.

IAZ004>007-015>017-090945-
/O.CAN.KDMX.WS.W.0007.000000T0000Z-180409T1200Z/
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
342 AM CDT Mon Apr 9 2018

...WINTER STORM WARNING IS CANCELLED...

Precipitation has mostly ended although a few flurries are
expected through sunrise with no accumulations. The warning is
therefore cancelled. 

$$

IAZ023>026-033>036-044>047-057>059-070>072-081-082-092-093-090945-
/O.CAN.KDMX.WW.Y.0019.000000T0000Z-180409T1200Z/
Pocahontas-Humboldt-Wright-Franklin-Sac-Calhoun-Webster-Hamilton-
Crawford-Carroll-Greene-Boone-Audubon-Guthrie-Dallas-Cass-Adair-
Madison-Adams-Union-Taylor-Ringgold-
Including the cities of Pocahontas, Laurens, Rolfe, Fonda, 
Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, 
Sac City, Lake View, Odebolt, Wall Lake, Schaller, Early, 
Rockwell City, Manson, Lake City, Pomeroy, Fort Dodge, 
Webster City, Denison, Carroll, Jefferson, Boone, Audubon, Exira,
Guthrie Center, Panora, Bayard, Casey, Perry, Waukee, Adel, 
Atlantic, Greenfield, Stuart, Adair, Fontanelle, Winterset, 
Earlham, Corning, Creston, Bedford, Lenox, New Market, 
and Mount Ayr
342 AM CDT Mon Apr 9 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

A few flurries or a brief period of freezing drizzle remain
possible through sunrise. However, accumulating precipitation has
ended and therefore the advisory is cancelled. 


$$

IAZ027-028-037>039-048>050-060>062-073>075-083>086-094>097-091200-
/O.CON.KDMX.WW.Y.0019.000000T0000Z-180409T1200Z/
Butler-Bremer-Hardin-Grundy-Black Hawk-Story-Marshall-Tama-Polk-
Jasper-Poweshiek-Warren-Marion-Mahaska-Clarke-Lucas-Monroe-
Wapello-Decatur-Wayne-Appanoose-Davis-
Including the cities of Parkersburg, Clarksville, Shell Rock, 
Greene, Aplington, Allison, Dumont, Waverly, Iowa Falls, Eldora, 
Ackley, Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, 
Waterloo, Cedar Falls, Ames, Marshalltown, Tama, Toledo, Traer, 
Dysart, Gladbrook, Des Moines, Newton, Grinnell, Indianola, 
Norwalk, Carlisle, Pella, Knoxville, Oskaloosa, Osceola, 
Chariton, Albia, Ottumwa, Lamoni, Leon, Corydon, Seymour, 
Allerton, Humeston, Centerville, and Bloomfield
342 AM CDT Mon Apr 9 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT THIS
MORNING...

* WHAT...Mixed precipitation. Additional snow accumulations of
  less than one inch and ice accumulations of less than one tenth
  are expected.

* WHERE...Northern and Central Iowa.

* WHEN...Until 7 AM CDT Monday.

* ADDITIONAL DETAILS...The snow and ice will result in difficult 
  travel conditions, especially on bridges and elevated 
  surfaces. 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 8, 12:45 PM CDT, 3 hours 3 minutes earlier.

Area forecast discussion, Apr 8, 12:45 PM CDT, 3 hours 3 minutes before
Area Forecast Discussion
National Weather Service Des Moines IA
1245 PM CDT Sun Apr 8 2018

.SHORT TERM.../Today through Tonight/
Issued at 315 AM CDT Sun Apr 8 2018

Shortwave currently passing across the Front Range of the Rockies
will continue to progress east today.  Warm advection across the
Plains ahead of the shortwave is increasing with isentropic lift
strengthening.  This has lead to the development of a broad swath of
snow from northeast/north central Nebraska northwest into Montana.
Models continue to indicate the isentropic lift moving into Iowa
this morning and persisting into tonight.  Pressure deficits will
drop rather quickly in west central and northwest areas initially
with precipitation moving into those areas by mid morning.  The
strongest lift remains across northern Iowa into this afternoon and
this will likely be the area of higher QPF.  Snow ratios may
initially be rather robust but may not be realized as much in
impacts with relatively quick compaction and increasing road
temperatures today.  Farther south, the RAP and HRRR remain dry into
southern Iowa but they seem to be keeping the low levels much too
dry.  Given the decent lift by midday into the afternoon, some light
precipitation seem likely in the south as well.  Precipitation types
in the south may waffle between rain and snow as temperatures will
be a bit higher. The higher precipitation rates in the south will
likely be associated with snow and lighter rates with sprinkles or
very light rain.

For tonight, the upper low will drift southeast toward the state
with relatively good forcing persisting across much of the forecast
area. However, the mid levels are drying at this point and there is
likely some threat of mixed precipitation on the western fringe of
the precipitation area where the dry will be most pronounced.
Farther to the north and east, deeper saturation will persist with
snow the likely precipitation type into tonight.  Precipitation will
be ending from west to east late tonight as the upper system and
forcing slowly progress through the state.  Total snow amounts
remain similar to previous forecast with highest amounts near the
Minnesota border.  Estherville will top out around 6 inches with 4
or more generally along and north of Highway 20 with up to 3-3.5"
along the Highway 30 corridor.  Therefore, have expanded the
advisory farther west along Highway 30 as amounts from Jefferson to
Ames are very similar to those in Marshalltown where the advisory
already exists.

.LONG TERM.../Monday through Saturday/
Issued at 310 AM CDT Sun Apr 8 2018

Long term period begins Monday morning with possibly some
lingering light snow or freezing rain, but precip chances cease
by 18z as deep layer subsidence increases behind the departing
wave. Northerly winds keep temperatures well below normal through
the day, but a long awaited warm up commences Tuesday as upper
level ridging finally starts to build east of the Rockies. We will
more typical spring like conditions by Wednesday as breezy
southwest winds help push temperatures into the 50s and 60s. A
shortwave trough quickly slides through the area Wednesday
evening, but dry mid- level air will limit most precip potential.

Persistent southerly flow in response to a deepening western
conus trough will support a few more warm days to end the work
week. The Des Moines area could see its first 70 degree day of
the year by Friday. All long range model guidance continues to
show a deep low emerging into the central or northern Plains by
the weekend. Gusty winds and a return to below normal temperatures
are likely, but the precipitation potential is much more nebulous
at this time due to significant model differences in the track
and evolution of this system. Slight to low chance PoPs from the
model blend are appropriate until the models begin to converge on
a unified solution.

&&

.AVIATION.../For the 18Z TAFS through 18Z Monday afternoon/
Issued at 1245 PM CDT Sun Apr 8 2018

Areas of snow and widespread MVFR or lower cigs can be expected
through much of the forecast period. Conditions will gradually
deteriorate through the day as snow becomes more widespread. There
will likely be a period of IFR to LIFR cigs late tonight into
early Monday before some improvement arrives by mid to late
morning.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory until 7 AM CDT Monday for IAZ006-007-016-
017-025>028-036>039-047>050.

Winter Weather Advisory until 7 AM CDT Monday for IAZ004-005-015-
023-024-033>035-046.

&&

SHORT TERM...Cogil
LONG TERM...Martin
AVIATION...Donavon
Hazardous weather outlook, Apr 8, 3:33 AM CDT, 12 hours 15 minutes before
Hazardous Weather Outlook
National Weather Service Des Moines IA
333 AM CDT Sun Apr 8 2018

IAZ004>007-015>017-023>028-033>039-046>050-090845-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Greene-Boone-Story-
Marshall-Tama-
333 AM CDT Sun Apr 8 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

A Winter Weather Advisory is in effect for the area. Please refer
to the National Weather Service website at weather.gov/desmoines
for further details.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

A few thunderstorms are possible Thursday night into Friday. The
threat for severe weather is low at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed. However, snowfall reports
are always appreciated.

IAZ044-045-057>062-070>075-081>086-092>097-090845-
Crawford-Carroll-Audubon-Guthrie-Dallas-Polk-Jasper-Poweshiek-
Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-Clarke-Lucas-
Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-Appanoose-Davis-
333 AM CDT Sun Apr 8 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Light snowfall will overspread much of central and southern Iowa
this afternoon and evening, possibly continuing into Sunday night.
Temperatures hovering near freezing will limit most accumulation
to grassy or elevated surfaces, but a few slick roadways are
still possible.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

A few thunderstorms are possible Thursday night into Friday. The
threat for severe weather is low at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed. However, snowfall reports
are always appreciated.

In the hours before

Local storm report, Apr 8, 1:54 PM CDT, 1 hour 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
154 PM CDT SUN APR 8 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0153 PM     SNOW             1 NNW CLEAR LAKE        43.14N 93.38W
04/08/2018  M2.8 INCH        CERRO GORDO        IA   TRAINED SPOTTER

            1 MILE WEST OF INTERSTATE 35 AT EXIT 194.
            REPORT VIA SOCIAL MEDIA.

0128 PM     SNOW             FOREST CITY             43.26N 93.64W
04/08/2018  E2.0 INCH        WINNEBAGO          IA   PUBLIC

            REPORT VIA SOCIAL MEDIA.

&&
Local storm report, Apr 8, 1:59 PM CDT, 1 hour 49 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
159 PM CDT SUN APR 8 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0155 PM     SNOW             LELAND                  43.34N 93.64W
04/08/2018  E4.0 INCH        WINNEBAGO          IA   PUBLIC

            VIA SOCIAL MEDIA.

&&

BF
Local storm report, Apr 8, 2:08 PM CDT, 1 hour 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
208 PM CDT SUN APR 8 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0200 PM     SNOW             FOREST CITY             43.26N 93.64W
04/08/2018  M3.5 INCH        WINNEBAGO          IA   PUBLIC

            REPORT VIA SOCIAL MEDIA.

0200 PM     SNOW             CLARKSVILLE             42.78N 92.67W
04/08/2018  M2.0 INCH        BUTLER             IA   PUBLIC

            REPORT VIA SOCIAL MEDIA.

0155 PM     SNOW             EMMETSBURG              43.11N 94.68W
04/08/2018  M3.0 INCH        PALO ALTO          IA   PUBLIC

            REPORT VIA SOCIAL MEDIA.

&&
Local storm report, Apr 8, 2:09 PM CDT, 1 hour 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
209 PM CDT SUN APR 8 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1115 AM     SNOW             FOREST CITY             43.26N 93.64W
04/08/2018  M2.0 INCH        WINNEBAGO          IA   PUBLIC

            CORRECTS PREVIOUS SNOW REPORT FROM FOREST
            CITY. VIA SOCIAL MEDIA. CORRECTED FOR TIME
            OF REPORT.

&&

BF
Local storm report, Apr 8, 3:01 PM CDT, 47 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
301 PM CDT SUN APR 8 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0250 PM     SNOW             CLEAR LAKE              43.14N 93.37W
04/08/2018  M4.5 INCH        CERRO GORDO        IA   PUBLIC

            SNOWFALL 4.5 TO 5 INCHES. 2 INCHES FELL FROM
            1:45 TO 2:45.

&&

FAB
Local storm report, Apr 8, 3:10 PM CDT, 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
310 PM CDT SUN APR 8 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0200 PM     SNOW             PLYMOUTH                43.24N 93.12W
04/08/2018  M2.0 INCH        CERRO GORDO        IA   TRAINED SPOTTER

&&

FAB

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.