Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 110, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Dec 15, 2021, 8:16 PM CST for Crawford County, Grant County, Vernon County, Wisconsin; Allamakee County, Clayton County, Iowa. It was in force for 74 min. 6 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
- Dec 15, 2021, 8:16 PM CST (02:16 UTC)
- Expired
- Dec 15, 2021, 9:30 PM CST
- In force
- 74 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Tornado
- Possible
- Damage threat
- Considerable
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Allamakee County, IA, Clayton County, IA, Crawford County, WI, Grant County, WI, Vernon County, WI
The radar
The La Crosse radar (KARX), 87 km from the middle of the area, began a volume at 02:18 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 |
|---|---|---|---|
| Dec 15, 9:03 PM CST | TSTM WND GST 63 | Bagley, WI | |
| Dec 15, 9:12 PM CST | TSTM WND DMG | 3 Ne Bridgeport, WI | |
| Dec 15, 9:15 PM CST | TSTM WND GST 62 | 5 S Viroqua, WI | |
| Dec 15, 9:20 PM CST | TSTM WND GST 50 | Lancaster, WI | |
| Dec 15, 9:27 PM CST | NON-TSTM WND GST 51 | 1 Ne Boscobel, WI | ASOS STATION KOVS BOSCOBEL AIRPORT. |
| Dec 15, 9:32 PM CST | TSTM WND GST 62 | 2 N Viola, WI |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Dec 15, 5:30 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 2.3 hours before the alert went out and 164 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
- 229 J/kg
- Mixed-layer CIN
- -358 J/kg
- Mixed-layer LCL
- 1061 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 433 m²/s²
- 0-3 km storm-relative helicity
- 496 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
059
WUUS53 KARX 160216
SVRARX
IAC005-043-WIC023-043-123-160330-
/O.NEW.KARX.SV.W.0110.211216T0216Z-211216T0330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
816 PM CST Wed Dec 15 2021
The National Weather Service in La Crosse has issued a
* Severe Thunderstorm Warning for...
Central Clayton County in northeastern Iowa...
Eastern Allamakee County in northeastern Iowa...
Southwestern Vernon County in southwestern Wisconsin...
Central Grant County in southwestern Wisconsin...
Crawford County in southwestern Wisconsin...
* Until 930 PM CST.
* At 816 PM CST, severe thunderstorms were located along a line
extending from 7 miles west of New Albin to near Aurora, moving
northeast at 55 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Severe thunderstorms will be near...
New Albin around 825 PM CST.
Guttenberg and Garnavillo around 855 PM CST.
Bloomington around 910 PM CST.
Boscobel around 930 PM CST.
Other locations impacted by these severe thunderstorms include
Eastman, Giard, Turkey River, National, Retreat, Fargo and Effigy
Mounds.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM CST for northeastern
Iowa...southeastern Minnesota...and southwestern Wisconsin.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 1100 PM CST for northeastern
Iowa...southeastern Minnesota...and southwestern Wisconsin.
&&
LAT...LON 4268 9090 4265 9090 4265 9132 4350 9133
4350 9122 4356 9123 4356 9066 4264 9068
TIME...MOT...LOC 0216Z 240DEG 46KT 4350 9144 4259 9176
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Rieck2 follow-up statements
795
WWUS53 KARX 160240
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
840 PM CST Wed Dec 15 2021
IAC005-043-WIC023-043-123-160330-
/O.CON.KARX.SV.W.0110.000000T0000Z-211216T0330Z/
Clayton IA-Allamakee IA-Vernon WI-Grant WI-Crawford WI-
840 PM CST Wed Dec 15 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CST
FOR CENTRAL CLAYTON...EASTERN ALLAMAKEE...SOUTHWESTERN VERNON...
CENTRAL GRANT AND CRAWFORD COUNTIES...
At 840 PM CST, severe thunderstorms were located along a line
extending from near New Albin to near Edgewood, moving east at 55
mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
These severe storms will be near...
Lansing around 845 PM CST.
Guttenberg around 855 PM CST.
Viroqua and Cassville around 900 PM CST.
Other locations impacted by these severe thunderstorms include
Eastman, Giard, Turkey River, National, Retreat, Fargo and Effigy
Mounds.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM CST for northeastern
Iowa...southeastern Minnesota...and southwestern Wisconsin.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4268 9090 4265 9090 4265 9132 4350 9133
4350 9122 4356 9123 4356 9066 4264 9068
TIME...MOT...LOC 0240Z 261DEG 46KT 4345 9124 4266 9131
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Rieck069
WWUS53 KARX 160319
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
919 PM CST Wed Dec 15 2021
IAC005-160328-
/O.CAN.KARX.SV.W.0110.000000T0000Z-211216T0330Z/
Allamakee IA-
919 PM CST Wed Dec 15 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ALLAMAKEE COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1100 PM CST for northeastern
Iowa...and southwestern Wisconsin.
LAT...LON 4268 9090 4265 9091 4265 9108 4275 9107
4288 9110 4291 9114 4308 9118 4313 9118
4326 9106 4332 9111 4335 9121 4356 9123
4356 9066 4264 9068
TIME...MOT...LOC 0318Z 270DEG 46KT 4368 9066 4289 9074
$$
IAC043-WIC023-043-123-160330-
/O.CON.KARX.SV.W.0110.000000T0000Z-211216T0330Z/
Clayton IA-Vernon WI-Grant WI-Crawford WI-
919 PM CST Wed Dec 15 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CST
FOR EASTERN CLAYTON...SOUTHWESTERN VERNON...CENTRAL GRANT AND
CRAWFORD COUNTIES...
At 918 PM CST, severe thunderstorms were located along a line
extending from 6 miles north of La Farge to near Lancaster, moving
east at 50 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
These severe thunderstorms will remain over mainly rural areas of
eastern Clayton, southwestern Vernon, central Grant and Crawford
Counties, including the following locations... Eastman, Horrigan
Ridge, Turkey River, Beetown, Bridgeport and Fairview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM CST for northeastern
Iowa...and southwestern Wisconsin.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4268 9090 4265 9091 4265 9108 4275 9107
4288 9110 4291 9114 4308 9118 4313 9118
4326 9106 4332 9111 4335 9121 4356 9123
4356 9066 4264 9068
TIME...MOT...LOC 0318Z 270DEG 46KT 4368 9066 4289 9074
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
RieckThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 15, 7:53 PM CST | Severe Thunderstorm Warning | ARX | Buffalo, La Crosse, Trempealeau | 67 min |
| Dec 15, 7:58 PM CST | Tornado Warning | ARX | Buffalo, Trempealeau | 47 min |
| Dec 15, 8:01 PM CST | Tornado Warning | ARX | Buffalo | 44 min |
| Dec 15, 8:24 PM CST | Severe Thunderstorm Warning | ARX | Clark, Jackson, La Crosse, Monroe, Vernon | 81 min |
| Dec 15, 9:05 PM CST | Severe Thunderstorm Warning | ARX | Clark | 25 min |
| Dec 15, 9:07 PM CST | Tornado Warning | ARX | Clark | 38 min |
| Dec 15, 9:08 PM CST | Severe Thunderstorm Warning | ARX | Grant, Richland | 52 min |
| Dec 15, 9:17 PM CST | Severe Thunderstorm Warning | ARX | Taylor | 43 min |
| Dec 15, 9:28 PM CST | Severe Thunderstorm Warning | ARX | Clark | 16 min |
| Dec 15, 9:32 PM CST | Tornado Warning | ARX | Clark, Taylor | 28 min |
| Dec 15, 9:33 PM CST | Severe Thunderstorm Warning | ARX | Adams, Juneau | 72 min |
| Dec 15, 6:37 PM CST | Severe Thunderstorm Warning | ARX | Chickasaw, Floyd, Howard, Mitchell | 68 min |
| Dec 15, 6:44 PM CST | Tornado Warning | ARX | Floyd | 32 min |
| Dec 15, 7:25 PM CST | Tornado Warning | ARX | Howard | 20 min |
| Dec 15, 7:29 PM CST | Severe Thunderstorm Warning | ARX | Allamakee, Clayton, Fayette, Winneshiek | 61 min |
| Dec 15, 7:38 PM CST | Tornado Warning | ARX | Winneshiek | 37 min |
| Dec 15, 8:29 PM CST | Severe Thunderstorm Warning | ARX | Allamakee, Clayton | 31 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2021Severe Thunderstorm Warnings in Iowa, 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.