Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 85, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Aug 11, 2021, 4:23 PM CDT for Grant County, Wisconsin. It was in force for 22 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 11, 2021, 4:23 PM CDT (21:23 UTC)
- Expired
- Aug 11, 2021, 4:45 PM CDT
- In force
- 22 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Grant County, WI
The radar
The La Crosse radar (KARX), 103 km from the middle of the area, began a volume at 21:24 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 11, 12:17 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.4 hours before the alert went out and 158 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
- 2852 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 1040 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 170 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.7
The text
As transmitted.
323
WUUS53 KARX 112123
SVRARX
WIC043-112145-
/O.NEW.KARX.SV.W.0085.210811T2123Z-210811T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
423 PM CDT Wed Aug 11 2021
The National Weather Service in La Crosse has issued a
* Severe Thunderstorm Warning for...
Northeastern Grant County in southwestern Wisconsin...
* Until 445 PM CDT.
* At 422 PM CDT, a severe thunderstorm was located 9 miles south of
Muscoda, or 16 miles west of Dodgeville, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Montfort, Centerville and Red Oak Ridge.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 800 PM CDT for southwestern
Wisconsin.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
A Tornado Watch remains in effect until 800 PM CDT for southwestern
Wisconsin.
&&
LAT...LON 4310 9055 4312 9043 4295 9043 4294 9052
TIME...MOT...LOC 2122Z 256DEG 27KT 4305 9044
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DTJ1 follow-up statement
501
WWUS53 KARX 112136
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
436 PM CDT Wed Aug 11 2021
WIC043-112145-
/O.EXP.KARX.SV.W.0085.000000T0000Z-210811T2145Z/
Grant WI-
436 PM CDT Wed Aug 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GRANT COUNTY WILL
EXPIRE AT 445 PM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However small hail
is still possible with the thunderstorms over northern Grant County.
A Tornado Watch remains in effect until 800 PM CDT for southwestern
Wisconsin.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
La Crosse.
LAT...LON 4310 9055 4312 9043 4295 9043 4294 9052
TIME...MOT...LOC 2135Z 256DEG 27KT 4307 9033
$$
DTJThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 9:19 PM CDT | River Flood Warning | ARX | La Crosse, Trempealeau | 30 hr |
| Aug 11, 11:32 AM CDT | Special Weather Statement | ARX | Taylor | 28 min |
| Aug 11, 11:57 AM CDT | Special Weather Statement | ARX | Clark, Taylor | 33 min |
| Aug 11, 12:18 PM CDT | Severe Thunderstorm Warning | ARX | Taylor | 42 min |
| Aug 11, 12:31 PM CDT | Special Weather Statement | ARX | Clark, Jackson, La Crosse, Monroe | 59 min |
| Aug 11, 1:01 PM CDT | Tornado Warning | ARX | Clark | 17 min |
| Aug 11, 1:07 PM CDT | Severe Thunderstorm Warning | ARX | La Crosse, Monroe | 38 min |
| Aug 11, 1:41 PM CDT | Severe Thunderstorm Warning | ARX | Juneau, Monroe | 64 min |
| Aug 11, 1:48 PM CDT | Tornado Warning | ARX | Juneau, Monroe | 42 min |
| Aug 11, 2:06 PM CDT | Severe Thunderstorm Warning | ARX | La Crosse, Monroe | 39 min |
| Aug 11, 2:18 PM CDT | Severe Thunderstorm Warning | ARX | La Crosse, Monroe, Vernon | 42 min |
| Aug 11, 2:20 PM CDT | Tornado Warning | ARX | Adams, Juneau, Monroe | 55 min |
| Aug 11, 2:32 PM CDT | Severe Thunderstorm Warning | ARX | Monroe | 28 min |
| Aug 11, 3:06 PM CDT | Severe Thunderstorm Warning | ARX | Richland, Vernon | 54 min |
| Aug 11, 4:19 PM CDT | Special Weather Statement | ARX | Grant | 26 min |
Nearby
Severe 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.