Alert archive / Iowa / Freeze Warnings in 2021
Freeze Warning 7, NWS La Crosse, WI
NWS La Crosse, WI issued this freeze warning at Oct 22, 2021, 1:56 PM CDT for 8 counties in Iowa; 5 counties in Minnesota; 5 counties in Wisconsin. It took effect at Oct 23, 2021, 1:00 AM CDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Oct 22, 2021, 1:56 PM CDT (18:56 UTC)
- In effect from
- Oct 23, 2021, 1:00 AM CDT
- Expired
- Oct 23, 2021, 9:00 AM CDT
- In force
- 8 hr
- Issued by
- NWS La Crosse, WI
Counties Allamakee County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Floyd County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Fillmore County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Winona County, MN, Crawford County, WI, Grant County, WI, La Crosse County, WI, Richland County, WI, Vernon County, WI
The radar
The La Crosse radar (KARX), 64 km from the middle of the area, began a volume at 18:57 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
Minneapolis, MN (KMPX), launched 12:00Z, 6.9 hours before the alert went out and 220 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
- 1276 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
291 WWUS73 KARX 221856 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 156 PM CDT Fri Oct 22 2021 IAZ008>011-018-019-029-030-MNZ087-088-094>096-WIZ041-053>055-061- 230300- /O.NEW.KARX.FZ.W.0007.211023T0600Z-211023T1400Z/ Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Olmsted-Winona-Mower-Fillmore-Houston-La Crosse-Vernon- Crawford-Richland-Grant- Including the cities of Osage, Cresco, Decorah, Waukon, Charles City, New Hampton, Oelwein, Elkader, Rochester, Winona, Austin, Preston, Caledonia, La Crosse, Viroqua, Prairie Du Chien, Richland Center, and Platteville 156 PM CDT Fri Oct 22 2021 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM CDT SATURDAY... * WHAT...Sub-freezing temperatures as low as 28 expected. * WHERE...Portions of southwest and west central Wisconsin, north central and northeast Iowa and southeast Minnesota. * WHEN...From 1 AM to 9 AM CDT Saturday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$
2 follow-up statements
516 WWUS73 KARX 230516 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 1216 AM CDT Sat Oct 23 2021 IAZ008>011-018-019-029-030-MNZ087-088-094>096-WIZ041-053>055-061- 231400- /O.CON.KARX.FZ.W.0007.211023T0600Z-211023T1400Z/ Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Olmsted-Winona-Mower-Fillmore-Houston-La Crosse-Vernon- Crawford-Richland-Grant- Including the cities of Osage, Cresco, Decorah, Waukon, Charles City, New Hampton, Oelwein, Elkader, Rochester, Winona, Austin, Preston, Caledonia, La Crosse, Viroqua, Prairie Du Chien, Richland Center, and Platteville 1216 AM CDT Sat Oct 23 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 28 expected. * WHERE...Portions of southwest and west central Wisconsin, north central and northeast Iowa and southeast Minnesota. * WHEN...Until 9 AM CDT this morning. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$
348 WWUS73 KARX 231354 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 854 AM CDT Sat Oct 23 2021 IAZ008>011-018-019-029-030-MNZ087-088-094>096-WIZ041-053>055-061- 231500- /O.EXP.KARX.FZ.W.0007.000000T0000Z-211023T1400Z/ Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Olmsted-Winona-Mower-Fillmore-Houston-La Crosse-Vernon- Crawford-Richland-Grant- Including the cities of Osage, Cresco, Decorah, Waukon, Charles City, New Hampton, Oelwein, Elkader, Rochester, Winona, Austin, Preston, Caledonia, La Crosse, Viroqua, Prairie Du Chien, Richland Center, and Platteville 854 AM CDT Sat Oct 23 2021 ...FREEZE WARNING WILL EXPIRE AT 9 AM CDT THIS MORNING... With temperatures beginning to climb, the freeze warning will expire at 9 AM. This will be the last frost or freeze product for the 2021 season. The frost and freeze program will resume with the start of the 2022 growing season. $$
Nearby
Freeze Warnings in Iowa, 2021Freeze Warnings in Minnesota, 2021Freeze Warnings in Wisconsin, 2021Every freeze warning 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.