Alert archive / Iowa / Winter Storm Watches in 2021
Winter Storm Watch 2, NWS La Crosse, WI
NWS La Crosse, WI issued this winter storm watch at Jan 29, 2021, 2:45 AM CST for Grant County, Wisconsin; Clayton County, Fayette County, Iowa. It took effect at Jan 30, 2021, 3:00 PM CST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Jan 29, 2021, 2:45 AM CST (08:45 UTC)
- In effect from
- Jan 30, 2021, 3:00 PM CST
- Expired
- Jan 29, 2021, 2:54 PM CST
- In force
- Issued by
- NWS La Crosse, WI
Counties Clayton County, IA, Fayette County, IA, Grant County, WI
The radar
The La Crosse radar (KARX), 108 km from the middle of the area, began a volume at 08:42 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
Davenport, (KDVN), launched 00:00Z, 8.8 hours before the alert went out and 153 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
- 1547 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 205 m²/s²
- 0-3 km storm-relative helicity
- 404 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
977 WWUS43 KARX 290845 WSWARX URGENT - WINTER WEATHER MESSAGE National Weather Service La Crosse WI 245 AM CST Fri Jan 29 2021 ...A Winter Storm May Impact the Area from Saturday Afternoon into Sunday Morning... .Snow will move into the area during the mid to late afternoon on Saturday. There may be even some light freezing drizzle during the early to mid afternoon. Heavy snow may fall across the area from late Saturday afternoon into Saturday evening. Hourly snow rates of 1 to 2 inches will be possible. The snow will then gradually taper off to flurries late Saturday night and Sunday morning. Total snow accumulations of 5 to 7 inches and ice accumulations of a light glaze will be possible. Travel conditions will worsen on Saturday afternoon. IAZ029-030-WIZ061-291645- /O.NEW.KARX.WS.A.0002.210130T2100Z-210131T1800Z/ Fayette-Clayton-Grant- Including the cities of Oelwein, Elkader, and Platteville 245 AM CST Fri Jan 29 2021 ...WINTER STORM WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY MORNING... * WHAT...Heavy snow. Possibly some light freezing drizzle on Saturday afternoon. Total snow accumulations of 5 to 7 inches and ice accumulations of a light glaze possible. * WHERE...In Wisconsin, Grant County. In Iowa, Fayette and Clayton Counties. * WHEN...From Saturday afternoon through Sunday morning. * IMPACTS...Plan on slippery road conditions. Travel conditions will worsen on Saturday afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ Boyne
2 follow-up statements
497 WWUS43 KARX 291623 WSWARX URGENT - WINTER WEATHER MESSAGE National Weather Service La Crosse WI 1023 AM CST Fri Jan 29 2021 ...Snow to Lead To Travel Impacts Saturday Afternoon Through Sunday Morning... .Snow is expected to move into the area by mid to late Saturday afternoon and last through Sunday morning, leading to travel impacts. While some questions still remain regarding strength of the system, there seems to be pretty good consensus of 4 to 7 inches of snow falling across parts of northeast Iowa into far southwest Wisconsin. The heaviest looks to fall Saturday evening, when some rates of 1 inch per hour will be possible, which will lead to road conditions quickly deteriorating. In addition, some light freezing drizzle will be possible prior to the snow moving in, though ice accumulation isn't expected to be any more than a light glaze at this time. Keep an eye on the forecast this weekend and adjust travel plans as needed. IAZ029-030-WIZ061-300100- /O.CON.KARX.WS.A.0002.210130T2100Z-210131T1800Z/ Fayette-Clayton-Grant- Including the cities of Oelwein, Elkader, and Platteville 1023 AM CST Fri Jan 29 2021 ...WINTER STORM WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY MORNING... * WHAT...Heavy snow and light freezing drizzle possible. Total snow accumulations of 4 to 7 inches and ice accumulations of a light glaze possible. * WHERE...In Wisconsin, Grant County. In Iowa, Clayton and Fayette Counties. * WHEN...From Saturday afternoon through Sunday morning. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ CA
857 WWUS43 KARX 292054 WSWARX URGENT - WINTER WEATHER MESSAGE National Weather Service La Crosse WI 254 PM CST Fri Jan 29 2021 ...Freezing Drizzle and Snow to Lead To Travel Impacts Saturday Morning Through Sunday... .Precipitation will begin Saturday morning as freezing drizzle with light accumulation of ice expected. This will lead to untreated roads becoming slippery during the day. The precipitation will turn to all snow late Saturday afternoon and evening and last through Sunday, leading to travel impacts. While some questions still remain regarding strength of the system, there seems to be pretty good consensus of 4 to 7 inches of snow falling across parts of northeast Iowa into far southwest Wisconsin. The heaviest looks to fall Saturday evening, where snow rates of 1 inch per hour will be possible. Keep an eye on the forecast this weekend and adjust travel plans as needed. IAZ029-030-300500- /O.UPG.KARX.WS.A.0002.210130T2100Z-210131T1800Z/ /O.NEW.KARX.WS.W.0002.210130T1500Z-210131T1800Z/ Fayette-Clayton- Including the cities of Oelwein and Elkader 254 PM CST Fri Jan 29 2021 ...WINTER STORM WARNING IN EFFECT FROM 9 AM SATURDAY TO NOON CST SUNDAY... * WHAT...Heavy snow and freezing drizzle expected. Total snow accumulations of 4 to 7 inches and ice accumulation of up to a tenth of an inch. Winds gusting as high as 35 mph could cause patchy blowing snow. * WHERE...Fayette and Clayton Counties. * WHEN...From 9 AM Saturday to noon CST Sunday. * IMPACTS...Plan on slippery road conditions. 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. && $$ WIZ061-300500- /O.UPG.KARX.WS.A.0002.210130T2100Z-210131T1800Z/ /O.NEW.KARX.WS.W.0002.210130T1800Z-210201T0000Z/ Grant- Including the city of Platteville 254 PM CST Fri Jan 29 2021 ...WINTER STORM WARNING IN EFFECT FROM NOON SATURDAY TO 6 PM CST SUNDAY... * WHAT...Heavy snow and freezing drizzle expected. Total snow accumulations of 4 to 7 inches and ice accumulations of up to a tenth of an inch. Winds gusting as high as 35 mph could cause patchy blowing snow. * WHERE...Grant County. * WHEN...From noon Saturday to 6 PM CST Sunday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IAZ008>011-018-019-MNZ079-086>088-094>096-300500- /O.NEW.KARX.WW.Y.0005.210130T1500Z-210131T1800Z/ Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Wabasha- Dodge-Olmsted-Winona-Mower-Fillmore-Houston- Including the cities of Osage, Cresco, Decorah, Waukon, Charles City, New Hampton, Wabasha, Dodge Center, Rochester, Winona, Austin, Preston, and Caledonia 254 PM CST Fri Jan 29 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 9 AM SATURDAY TO NOON CST SUNDAY... * WHAT...Snow and freezing drizzle expected. Total snow accumulations of 2 to 4 inches and ice accumulations of up to a tenth of an inch. * WHERE...Portions of north central and northeast Iowa and southeast Minnesota. * WHEN...From 9 AM Saturday to noon CST Sunday. * IMPACTS...Plan on slippery road conditions. 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. && $$ WIZ032>034-041>044-053>055-300500- /O.NEW.KARX.WW.Y.0005.210130T1800Z-210201T0000Z/ Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon- Crawford-Richland- Including the cities of Alma, Arcadia, Whitehall, Black River Falls, La Crosse, Sparta, Tomah, Mauston, Friendship, Viroqua, Prairie Du Chien, and Richland Center 254 PM CST Fri Jan 29 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM NOON SATURDAY TO 6 PM CST SUNDAY... * WHAT...Snow and freezing drizzle expected. Total snow accumulations of 2 to 4 inches and ice accumulations of up to a tenth of an inch. * WHERE...Portions of central, southwest and west central Wisconsin. * WHEN...From noon Saturday to 6 PM CST Sunday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ DTJ/CA
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 29, 2:54 PM CST | Winter Storm Warning | ARX | Grant | 45 hr |
| Jan 29, 2:54 PM CST | Winter Weather Advisory | ARX | Adams, Buffalo, Crawford, Jackson, Juneau, La Crosse and 4 more | 45 hr |
Nearby
Winter Storm Watches in Iowa, 2021Winter Storm Watches in Wisconsin, 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.