Alert archive / Iowa / Winter Storm Watches in 2021
Winter Storm Watch 2, NWS Des Moines, IA
NWS Des Moines, IA issued this winter storm watch at Jan 23, 2021, 3:27 PM CST for 22 counties in Iowa. It took effect at Jan 25, 2021, 6:00 AM CST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Jan 23, 2021, 3:27 PM CST (21:27 UTC)
- In effect from
- Jan 25, 2021, 6:00 AM CST
- Expired
- Jan 24, 2021, 3:17 AM CST
- In force
- Issued by
- NWS Des Moines, IA
All 22 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Cass County, IA, Clarke County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA
The radar
The Des Moines radar (KDMX), 66 km from the middle of the area, began a volume at 21:32 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.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 9.5 hours before the alert went out and 235 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
- 1047 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 278 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
913 WWUS43 KDMX 232127 WSWDMX URGENT - WINTER WEATHER MESSAGE National Weather Service Des Moines IA 327 PM CST Sat Jan 23 2021 ...Winter Storms Tonight and again Monday and Monday Night.. .Three winter systems will impact Iowa into midweek with the first two, and especially second, being the most significant. The first will produce light to moderate snow across central and northern Iowa tonight, mainly this evening, with areas of freezing drizzle south overnight. This will be followed by a larger, more significant winter storm Monday and Monday Night with widespread moderate to heavy snows across central and southern Iowa. Another weaker system is also anticipated late Tuesday into Wednesday morning. IAZ004>007-015>017-023>028-240500- /O.CON.KDMX.WW.Y.0004.000000T0000Z-210124T1200Z/ Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer- Including the cities of Estherville, Algona, Forest City, Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha, Mason City, Clear Lake, Pocahontas, Laurens, Rolfe, Fonda, Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison, Dumont, and Waverly 327 PM CST Sat Jan 23 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST SUNDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 5 inches with a few pockets of higher amounts possible. * WHERE...Northern Iowa. * WHEN...Through 6 AM CST Sunday, with peak snowfall rates this evening. * IMPACTS...Plan on snow covered and slippery road conditions. Minor blowing and drifting may occur with southeast winds of 10 to 15 mph. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IAZ059>062-070>075-081>086-092>097-240500- /O.NEW.KDMX.WS.A.0002.210125T1200Z-210126T1200Z/ Dallas-Polk-Jasper-Poweshiek-Cass-Adair-Madison-Warren-Marion- Mahaska-Adams-Union-Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold- Decatur-Wayne-Appanoose-Davis- Including the cities of Perry, Waukee, Adel, Des Moines, Newton, Grinnell, Atlantic, Greenfield, Stuart, Adair, Fontanelle, Winterset, Earlham, Indianola, Norwalk, Carlisle, Pella, Knoxville, Oskaloosa, Corning, Creston, Osceola, Chariton, Albia, Ottumwa, Bedford, Lenox, New Market, Mount Ayr, Lamoni, Leon, Corydon, Seymour, Allerton, Humeston, Centerville, and Bloomfield 327 PM CST Sat Jan 23 2021 ...WINTER STORM WATCH IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY NIGHT... * WHAT...Heavy snow possible. Total snow accumulations of 5 to 10 inches possible. Winds could gust as high as 35 mph. * WHERE...Central and southern Iowa. * WHEN...From Monday morning through late Monday night. * IMPACTS...Travel could be very difficult. Blowing snow could significantly reduce visibility. The hazardous conditions could especially impact the Monday evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ For more information from the National Weather Service visit https://weather.gov/desmoines Small
2 follow-up statements
194 WWUS43 KDMX 240320 WSWDMX URGENT - WINTER WEATHER MESSAGE National Weather Service Des Moines IA 920 PM CST Sat Jan 23 2021 ...Winter Storm Tonight and Again Monday and Monday Night.. .Three winter systems will impact Iowa into midweek with the first two being the most significant. Tonight's will produce light to moderate snow across central and northern Iowa through late evening with areas of freezing drizzle following the snow in the south tonight. The second larger and more significant winter storm is expected Monday and Monday Night. Widespread moderate to heavy snow will fall across central and southern Iowa. Another weaker system is also anticipated late Tuesday into Wednesday morning which could add several more inches of snowfall. IAZ004>007-015>017-023>028-241130- /O.CON.KDMX.WW.Y.0004.000000T0000Z-210124T1200Z/ Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer- Including the cities of Estherville, Algona, Forest City, Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha, Mason City, Clear Lake, Pocahontas, Laurens, Rolfe, Fonda, Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison, Dumont, and Waverly 920 PM CST Sat Jan 23 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST SUNDAY... * WHAT...Snow expected. Total snow accumulations of 2 to 4 inches with a few pockets of higher amounts possible. * WHERE...Northern Iowa. * WHEN...Through 6 AM CST Sunday, with peak snowfall rates through midnight. * IMPACTS...Plan on snow covered and slippery road conditions. Minor blowing and drifting may occur with southeast winds of 10 to 15 mph. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IAZ059>062-070>075-081>086-092>097-241130- /O.CON.KDMX.WS.A.0002.210125T1200Z-210126T1200Z/ Dallas-Polk-Jasper-Poweshiek-Cass-Adair-Madison-Warren-Marion- Mahaska-Adams-Union-Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold- Decatur-Wayne-Appanoose-Davis- Including the cities of Perry, Waukee, Adel, Des Moines, Newton, Grinnell, Atlantic, Greenfield, Stuart, Adair, Fontanelle, Winterset, Earlham, Indianola, Norwalk, Carlisle, Pella, Knoxville, Oskaloosa, Corning, Creston, Osceola, Chariton, Albia, Ottumwa, Bedford, Lenox, New Market, Mount Ayr, Lamoni, Leon, Corydon, Seymour, Allerton, Humeston, Centerville, and Bloomfield 920 PM CST Sat Jan 23 2021 ...WINTER STORM WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY NIGHT... * WHAT...Heavy snow possible. Total snow accumulations of 5 to 10 inches possible. Winds could gust as high as 35 mph. * WHERE...Central and southern Iowa. * WHEN...From Monday morning through late Monday night. * IMPACTS...Travel could be very difficult. Blowing snow could significantly reduce visibility and result in very hazardous travel. These hazardous conditions are expected to impact the Monday afternoon through evening commutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ For more information from the National Weather Service visit https://weather.gov/desmoines
423 WWUS43 KDMX 240917 WSWDMX URGENT - WINTER WEATHER MESSAGE National Weather Service Des Moines IA 317 AM CST Sun Jan 24 2021 ...Winter Storm Monday and Monday Night.. .A significant winter storm is expected to impact much of central and southern Iowa Monday and Monday night. Snow possibly becoming a wintry mix at times, will begin across far southern Iowa late tonight then will expand north into central Iowa during the day Monday. Heavy snowfall rates are likely with this storm, in particular, during Monday afternoon and will result in widespread moderate to heavy snow. Increasing northeast wind may gust over 30 mph at times and will cause moderate blowing and drifting. Some uncertainty remains on the north edge of the snow band, where a sharp gradient in snow totals is likely. The most uncertain areas have been placed into a Winter Storm Watch. IAZ004>007-015>017-023>028-241030- /O.CAN.KDMX.WW.Y.0004.000000T0000Z-210124T1200Z/ Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer- Including the cities of Estherville, Algona, Forest City, Lake Mills, Northwood, Manly, Emmetsburg, Garner, Britt, Kanawha, Mason City, Clear Lake, Pocahontas, Laurens, Rolfe, Fonda, Gilmore City, Humboldt, Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison, Dumont, and Waverly 317 AM CST Sun Jan 24 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Snow is ending and the advisory has been cancelled. $$ IAZ059>062-070>075-081>086-092>097-241730- /O.UPG.KDMX.WS.A.0002.210125T1200Z-210126T1200Z/ /O.NEW.KDMX.WS.W.0002.210125T1200Z-210126T1200Z/ Dallas-Polk-Jasper-Poweshiek-Cass-Adair-Madison-Warren-Marion- Mahaska-Adams-Union-Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold- Decatur-Wayne-Appanoose-Davis- Including the cities of Perry, Waukee, Adel, Des Moines, Newton, Grinnell, Atlantic, Greenfield, Stuart, Adair, Fontanelle, Winterset, Earlham, Indianola, Norwalk, Carlisle, Pella, Knoxville, Oskaloosa, Corning, Creston, Osceola, Chariton, Albia, Ottumwa, Bedford, Lenox, New Market, Mount Ayr, Lamoni, Leon, Corydon, Seymour, Allerton, Humeston, Centerville, and Bloomfield 317 AM CST Sun Jan 24 2021 ...WINTER STORM WARNING IN EFFECT FROM 6 AM MONDAY TO 6 AM CST TUESDAY... * WHAT...Heavy snow and blowing snow expected. Total snow accumulations of 8 to 12 inches with locally higher. Highest amounts will be over southern Iowa. * WHERE...Parts of central and southern Iowa along and south of Interstate 80. * WHEN...From 6 AM Monday to 6 AM CST Tuesday. * IMPACTS...Travel could be very difficult to impossible. Blowing snow could significantly reduce visibility and cause moderate drifting. The hazardous conditions will significantly impact the Monday evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IAZ037>039-044>050-057-058-241730- /O.NEW.KDMX.WS.A.0003.210125T1200Z-210126T1200Z/ Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-Boone-Story- Marshall-Tama-Audubon-Guthrie- Including the cities of 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, and Casey 317 AM CST Sun Jan 24 2021 ...WINTER STORM WATCH IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY NIGHT... * WHAT...Moderate to heavy snow possible. Total snow accumulations of 2 to 8 inches possible with the highest amounts on the south end of the watch. Subtle changes in the forecast storm track may have big changes in the snow totals. There will likely be a sharp snow total gradient across this area, thus the wide range. * WHERE...Portions of central Iowa generally along the Highway 20 and Highway 30 corridors. * WHEN...From Monday morning through late Monday night. * IMPACTS...Travel could be very difficult. Blowing snow could significantly reduce visibility and cause moderate drifting. The hazardous conditions could significantly impact the Monday evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ For more information from the National Weather Service visit https://weather.gov/desmoines
Nearby
Winter Storm Watches in Iowa, 2021Every winter storm watch in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.