Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 4, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at May 2, 2021, 4:56 PM CDT for Winona County, Minnesota; Trempealeau County, Wisconsin. It was in force for 34 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 2, 2021, 4:56 PM CDT (21:56 UTC)
- Expired
- May 2, 2021, 5:30 PM CDT
- In force
- 34 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Winona County, MN, Trempealeau County, WI
The radar
The La Crosse radar (KARX), 29 km from the middle of the area, began a volume at 21:56 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 |
|---|---|---|---|
| May 2, 5:19 PM CDT | HAIL 1 | 2 Wsw Galesville, WI | |
| May 2, 5:27 PM CDT | HAIL 1 | 2 W Galesville, WI | REPORT FROM MPING: QUARTER (1.00 IN.). |
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, 9.9 hours before the alert went out and 198 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
- 3075 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -80 m²/s²
- 0-3 km storm-relative helicity
- -13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
271
WUUS53 KARX 022156
SVRARX
MNC169-WIC121-022230-
/O.NEW.KARX.SV.W.0004.210502T2156Z-210502T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
456 PM CDT Sun May 2 2021
The National Weather Service in La Crosse has issued a
* Severe Thunderstorm Warning for...
Eastern Winona County in southeastern Minnesota...
Southwestern Trempealeau County in west central Wisconsin...
* Until 530 PM CDT.
* At 456 PM CDT, a severe thunderstorm was located near Trempealeau,
or 8 miles east of Winona, moving east at 20 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* This severe thunderstorm will be near...
Trempealeau around 505 PM CDT.
Galesville around 520 PM CDT.
Other locations impacted by this severe thunderstorm include Perrot
State Park and Lock And Dam 6.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4414 9133 4405 9132 4403 9134 4402 9134
4399 9132 4399 9137 4398 9142 4398 9154
4408 9154
TIME...MOT...LOC 2156Z 251DEG 19KT 4403 9150
HAIL...1.00IN
WIND...<50MPH
$$
Rieck1 follow-up statement
698
WWUS53 KARX 022220
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
520 PM CDT Sun May 2 2021
MNC169-022228-
/O.CAN.KARX.SV.W.0004.000000T0000Z-210502T2230Z/
Winona MN-
520 PM CDT Sun May 2 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WINONA COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
Additional severe weather is possible.
LAT...LON 4414 9133 4405 9132 4403 9135 4402 9142
4402 9148 4408 9154
TIME...MOT...LOC 2218Z 248DEG 18KT 4407 9137
$$
WIC121-022230-
/O.CON.KARX.SV.W.0004.000000T0000Z-210502T2230Z/
Trempealeau WI-
520 PM CDT Sun May 2 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR SOUTHWESTERN TREMPEALEAU COUNTY...
At 518 PM CDT, a severe thunderstorm was located over Galesville, or
13 miles southeast of Arcadia, moving east at 20 mph.
HAZARD...Quarter size hail. Off duty NWS personnel reported quarter
sized hail in Galesville at 520 pm.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
This severe thunderstorm will remain over mainly rural areas of
southwestern Trempealeau County, including the following locations...
Perrot State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4414 9133 4405 9132 4403 9135 4402 9142
4402 9148 4408 9154
TIME...MOT...LOC 2218Z 248DEG 18KT 4407 9137
HAIL...1.00IN
WIND...<50MPH
$$
RieckThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 2, 5:10 PM CDT | Severe Thunderstorm Warning | ARX | Olmsted, Winona | 50 min |
| May 2, 5:16 PM CDT | Severe Thunderstorm Warning | ARX | Fillmore | 29 min |
| May 2, 5:44 PM CDT | Severe Thunderstorm Warning | ARX | Winona | 40 min |
| May 2, 5:28 PM CDT | Severe Thunderstorm Warning | ARX | Trempealeau | 47 min |
| May 2, 5:59 PM CDT | Severe Thunderstorm Warning | ARX | Jackson, La Crosse, Trempealeau | 29 min |
| May 2, 6:52 PM CDT | Severe Thunderstorm Warning | ARX | Monroe, Vernon | 38 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2021Severe Thunderstorm Warnings in Wisconsin, 2021Every severe thunderstorm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.