Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 83, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Aug 2, 2012, 3:59 AM CDT for Crawford County, Richland County, Vernon County, Wisconsin. It was in force for 46 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
- Aug 2, 2012, 3:59 AM CDT (08:59 UTC)
- Expired
- Aug 2, 2012, 4:45 AM CDT
- In force
- 46 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
Counties Crawford County, WI, Richland County, WI, Vernon County, WI
The radar
The La Crosse radar (KARX), 49 km from the middle of the area, began a volume at 09:02 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 |
|---|---|---|---|
| Aug 2, 4:28 AM CDT | TSTM WND DMG | 2 W Viroqua, WI | TREE BLOWN DOWN IN SIDIE HOLLOW PARK. |
| Aug 2, 4:30 AM CDT | TSTM WND DMG | 4 N Viroqua, WI | TREE DOWN ON WEST SMITH ROAD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 9.0 hours before the alert went out and 205 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
- 3 J/kg
- Mixed-layer CIN
- -282 J/kg
- Mixed-layer LCL
- 2322 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -60 m²/s²
- 0-3 km storm-relative helicity
- -53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
040
WUUS53 KARX 020859
SVRARX
WIC023-103-123-020945-
/O.NEW.KARX.SV.W.0083.120802T0859Z-120802T0945Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
359 AM CDT THU AUG 2 2012
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN CRAWFORD COUNTY IN SOUTHWEST WISCONSIN...
NORTHWESTERN RICHLAND COUNTY IN SOUTHWEST WISCONSIN...
SOUTHERN VERNON COUNTY IN SOUTHWEST WISCONSIN...
* UNTIL 445 AM CDT
* AT 353 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR RED MOUND...OR 11 MILES NORTHEAST
OF LANSING...MOVING EAST AT 35 MPH. THIS STORM CAN PRODUCE LARGE
DAMAGING HAIL UP TO GOLF BALL SIZE AND DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS WARNING EXTENDS THE PREVIOUS SEVERE THUNDERSTORM
WARNING FOR VERNON COUNTY.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
FARGO AND SIDIE HOLLOW COUNTY PARK AROUND 405 AM...
VIROQUA AND LIBERTY POLE AROUND 410 AM...
FOLSOM AND COUNTY ROADS J AND C AROUND 420 AM...
READSTOWN AND LIBERTY AROUND 425 AM...
LA FARGE AND KICKAPOO CENTER AROUND 430 AM...
SYLVAN AND HIGHWAY 56 AND COUNTY M M AROUND 435 AM...
SABIN AROUND 440 AM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. DAMAGING
WINDS ARE ALSO EXPECTED...WHICH WILL UPROOT TREES AND DOWN POWER
LINES. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.
&&
LAT...LON 4330 9058 4340 9120 4341 9121 4363 9118
4362 9052
TIME...MOT...LOC 0858Z 277DEG 32KT 4349 9107
WIND...HAIL 60MPH 1.75IN
$$
HALBACH3 follow-up statements
622
WWUS53 KARX 020918
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
418 AM CDT THU AUG 2 2012
WIC023-103-123-020945-
/O.CON.KARX.SV.W.0083.000000T0000Z-120802T0945Z/
CRAWFORD WI-VERNON WI-RICHLAND WI-
418 AM CDT THU AUG 2 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
RICHLAND...SOUTHERN VERNON AND NORTHERN CRAWFORD COUNTIES UNTIL 445
AM CDT...
AT 415 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR LIBERTY POLE...OR 6 MILES SOUTH OF
VIROQUA...MOVING EAST AT 35 MPH. THIS STORM CAN PRODUCE QUARTER SIZE
HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
READSTOWN AND LIBERTY AROUND 425 AM...
LA FARGE AND KICKAPOO CENTER AROUND 430 AM...
SYLVAN AND HIGHWAY 56 AND COUNTY M M AROUND 435 AM...
SABIN AND FIVE POINTS AROUND 440 AM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE
AND STAY AWAY FROM WINDOWS.
LIGHTNING AND FALLING TREES CAN KILL. CAMPING VEHICLES AND TENTS ARE
NOT SAFE DURING THUNDERSTORMS. MOVE TO A PRE-DESIGNATED SHELTER IF
AVAILABLE. IF NO STRONG SHELTER IS AVAILABLE...SEEK SHELTER IN A
DEPRESSION OR RAVINE...BUT AVOID STREAM BEDS AND DRY WASHES. ASSUME
THE LIGHTNING POSITION BY MINIMIZING YOUR HEIGHT AND CONTACT WITH THE
GROUND. CROUCH LOW AND WRAP YOUR ARMS AROUND YOUR LEGS.
&&
LAT...LON 4330 9058 4340 9120 4341 9121 4363 9118
4362 9052
TIME...MOT...LOC 0919Z 277DEG 32KT 4347 9081
WIND...HAIL 60MPH 1.00IN
$$
HALBACH298
WWUS53 KARX 020933
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
433 AM CDT THU AUG 2 2012
WIC023-103-123-020945-
/O.CON.KARX.SV.W.0083.000000T0000Z-120802T0945Z/
CRAWFORD WI-VERNON WI-RICHLAND WI-
433 AM CDT THU AUG 2 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
RICHLAND...SOUTHERN VERNON AND NORTHERN CRAWFORD COUNTIES UNTIL 445
AM CDT...
AT 428 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR KICKAPOO CENTER...OR 11 MILES
SOUTHEAST OF VIROQUA...MOVING EAST AT 35 MPH. THIS STORM CAN PRODUCE
PENNY SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
SYLVAN AROUND 435 AM...
SABIN AND FIVE POINTS AROUND 440 AM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS AND SMALL HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.
LIGHTNING AND FALLING TREES CAN KILL. CAMPING VEHICLES AND TENTS ARE
NOT SAFE DURING THUNDERSTORMS. MOVE TO A PRE-DESIGNATED SHELTER IF
AVAILABLE. IF NO STRONG SHELTER IS AVAILABLE...SEEK SHELTER IN A
DEPRESSION OR RAVINE...BUT AVOID STREAM BEDS AND DRY WASHES. ASSUME
THE LIGHTNING POSITION BY MINIMIZING YOUR HEIGHT AND CONTACT WITH THE
GROUND. CROUCH LOW AND WRAP YOUR ARMS AROUND YOUR LEGS.
&&
LAT...LON 4330 9058 4340 9120 4341 9121 4363 9118
4362 9052
TIME...MOT...LOC 0933Z 277DEG 32KT 4345 9064
WIND...HAIL 60MPH 0.75IN
$$
HALBACH882
WWUS53 KARX 020941
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
441 AM CDT THU AUG 2 2012
WIC023-103-123-020951-
/O.EXP.KARX.SV.W.0083.000000T0000Z-120802T0945Z/
CRAWFORD WI-VERNON WI-RICHLAND WI-
441 AM CDT THU AUG 2 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN RICHLAND...
SOUTHERN VERNON AND NORTHERN CRAWFORD COUNTIES WILL EXPIRE AT 445 AM
CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
LAT...LON 4330 9058 4340 9120 4341 9121 4363 9118
4362 9052
TIME...MOT...LOC 0941Z 278DEG 29KT 4344 9060
$$
HALBACHThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 12:25 AM CDT | Severe Thunderstorm Warning | ARX | Jackson, Juneau | 33 min |
| Aug 2, 3:22 AM CDT | Severe Thunderstorm Warning | ARX | Vernon | 38 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2012Every severe thunderstorm warning in 2012
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.