Alert archive / Iowa / Winter Storm Warnings in 2018
Winter Storm Warning 7, NWS Des Moines, IA
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
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 8, 3:59 PM CDT | SNOW 3 | Algona, IA | VIA SOCIAL MEDIA. |
| Apr 8, 4:05 PM CDT | SNOW 5.5 | 1 Nnw Clear Lake, IA | |
| Apr 8, 4:18 PM CDT | SNOW 6.5 | Leland, IA | VIA SOCIAL MEDIA. |
| Apr 8, 4:23 PM CDT | SNOW 4 | Garner, IA | VIA SOCIAL MEDIA. |
| Apr 8, 4:30 PM CDT | SNOW 4 | Graettinger, IA | VIA SOCIAL MEDIA. |
| Apr 8, 4:49 PM CDT | SNOW 5.5 | 1 Ne Mason City, IA | |
| Apr 8, 4:49 PM CDT | SNOW 6.5 | 1 Nnw Clear Lake, IA | |
| Apr 8, 5:20 PM CDT | SNOW 5.5 | Emmetsburg, IA | VIA SOCIAL MEDIA. |
| Apr 8, 5:40 PM CDT | SNOW 7 | 1 Nnw Clear Lake, IA | VIA SOCIAL MEDIA. |
| Apr 8, 6:09 PM CDT | SNOW 6 | Mason City, IA | VIA SOCIAL MEDIA. |
| Apr 8, 7:55 PM CDT | SNOW 7.5 | Leland, IA | VIA SOCIAL MEDIA. |
| Apr 8, 8:16 PM CDT | SNOW 7 | Mason City, IA | VIA SOCIAL MEDIA. |
| Apr 8, 8:25 PM CDT | SNOW 6 | Emmetsburg, IA | VIA SOCIAL MEDIA. |
| Apr 8, 8:43 PM CDT | SNOW 6 | Mason City, IA | FROM KIMT TV. |
| Apr 8, 10:46 PM CDT | SNOW 7 | Mason City, IA | |
| Apr 8, 11:53 PM CDT | SNOW 5.3 | 1 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.
- 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
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.
&&
BFLocal 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.
&&
BFLocal 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.
&&
FABLocal 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
&&
FABNearby
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.