Alert archive / Wisconsin / Tornado Warnings in 2012
Tornado Warning 6, NWS La Crosse, WI
NWS La Crosse, WI issued this tornado warning at Sep 4, 2012, 7:41 PM CDT for Grant County, Wisconsin. It was in force for 34 min. 1 report 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
- Sep 4, 2012, 7:41 PM CDT (00:41 UTC)
- Expired
- Sep 4, 2012, 8:15 PM CDT
- In force
- 34 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
County Grant County, WI
The radar
The La Crosse radar (KARX), 107 km from the middle of the area, began a volume at 00:43 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 |
|---|---|---|---|
| Sep 4, 8:15 PM CDT | HAIL 1.25 | 2 Se Patch Grove, WI | OFF DUTY DISPATCHER REPORTED HAIL 1 TO 1.25 INCHES. SOME OF IT WAS CLUMPED TOGETHER WITH 3 TO 5 STONES. A FEW OF THOSE HIT HIS CAR AND CAUSED DAMAGE. |
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 |
|---|---|---|---|
| Sep 4, 3:27 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.7 hours before the alert went out and 144 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
- 1890 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 1662 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.9
The text
As transmitted, in the capitals the NWS used until 2016.
051 WFUS53 KARX 050041 TORARX WIC043-050115- /O.NEW.KARX.TO.W.0006.120905T0041Z-120905T0115Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 741 PM CDT TUE SEP 4 2012 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * TORNADO WARNING FOR... WEST CENTRAL GRANT COUNTY IN SOUTHWEST WISCONSIN... * UNTIL 815 PM CDT * AT 738 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED A TORNADO NEAR PATCH GROVE...OR 10 MILES NORTHEAST OF GUTTENBERG...MOVING SOUTHEAST AT 15 MPH. * THE TORNADO WILL BE NEAR... BLOOMINGTON AROUND 750 PM... NORTH ANDOVER AROUND 805 PM... PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR AND STAY AWAY FROM WINDOWS! CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR A STURDY BUILDING. AS A LAST RESORT...LAY FLAT IN A DITCH AND COVER YOUR HEAD. && LAT...LON 4287 9082 4279 9094 4290 9108 4296 9098 TIME...MOT...LOC 0041Z 319DEG 11KT 4290 9099 $$ AJ
3 follow-up statements
549 WWUS53 KARX 050051 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 751 PM CDT TUE SEP 4 2012 WIC043-050115- /O.CON.KARX.TO.W.0006.000000T0000Z-120905T0115Z/ GRANT WI- 751 PM CDT TUE SEP 4 2012 ...A TORNADO WARNING REMAINS IN EFFECT FOR WEST CENTRAL GRANT COUNTY UNTIL 815 PM CDT... AT 747 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR STILL INDICATED A TORNADO LOCATED NEAR BLOOMINGTON...OR 10 MILES NORTHEAST OF GUTTENBERG...MOVING SOUTHEAST AT 15 MPH. AT 740 PM...LAW ENFORCEMENT OFFICIALS REPORTED A TORNADO ON THE GROUND NEAR PATCH GROVE. * THE TORNADO WILL BE NEAR... 5 MILES SOUTHEAST OF BLOOMINGTON AROUND 800 PM... PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR AND STAY AWAY FROM WINDOWS! CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR A STURDY BUILDING. AS A LAST RESORT...LAY FLAT IN A DITCH AND COVER YOUR HEAD. && LAT...LON 4295 9096 4287 9082 4279 9094 4288 9105 TIME...MOT...LOC 0050Z 303DEG 12KT 4288 9094 $$ AJ
937 WWUS53 KARX 050105 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 805 PM CDT TUE SEP 4 2012 WIC043-050115- /O.CON.KARX.TO.W.0006.000000T0000Z-120905T0115Z/ GRANT WI- 805 PM CDT TUE SEP 4 2012 ...A TORNADO WARNING REMAINS IN EFFECT FOR WEST CENTRAL GRANT COUNTY UNTIL 815 PM CDT... AT 801 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO LOCATED 5 MILES SOUTHEAST OF BLOOMINGTON...OR 10 MILES WEST OF LANCASTER...MOVING SOUTHEAST AT 20 MPH. * THE TORNADO WILL BE NEAR... 10 MILES SOUTHEAST OF BLOOMINGTON AROUND 810 PM... IN ADDITION...A LINE OF SEVERE THUNDERSTORMS LOCATED JUST NORTH OF BLOOMINGTON IS DROPPING SOUTH AT 20 MPH. THESE STORMS CAN PRODUCE DESTRUCTIVE WINDS IN EXCESS OF 70 MPH AND PING PONG BALL SIZE HAIL AS THEY MOVE THROUGH BLOOMINGTON. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR AND STAY AWAY FROM WINDOWS! CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR A STURDY BUILDING. AS A LAST RESORT...LAY FLAT IN A DITCH AND COVER YOUR HEAD. && LAT...LON 4292 9092 4287 9082 4282 9089 4287 9098 TIME...MOT...LOC 0103Z 295DEG 16KT 4287 9088 $$ AJ
494 WWUS53 KARX 050115 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 815 PM CDT TUE SEP 4 2012 WIC043-050124- /O.EXP.KARX.TO.W.0006.000000T0000Z-120905T0115Z/ GRANT WI- 815 PM CDT TUE SEP 4 2012 ...THE TORNADO WARNING FOR WEST CENTRAL GRANT COUNTY WILL EXPIRE AT 815 PM CDT... THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR ALL OF GRANT COUNTY UNTIL 845 PM CDT. A LINE OF SEVERE THUNDERSTORMS FROM BLOOMINGTON TO LANCASTER IS MOVING SOUTH AT 35 MPH. THESE STORMS HAVE HAD A HISTORY OF PRODUCING DESTRUCTIVE DAMAGING WINDS OF 70 MPH. LAT...LON 4292 9092 4287 9082 4282 9089 4287 9098 TIME...MOT...LOC 0114Z 295DEG 16KT 4285 9082 $$ AJ
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 7:00 PM CDT | Severe Thunderstorm Warning | ARX | Grant | 60 min |
| Sep 4, 7:10 PM CDT | Severe Thunderstorm Warning | ARX | Richland | 65 min |
| Sep 4, 7:35 PM CDT | Severe Thunderstorm Warning | ARX | Grant | 70 min |
| Sep 4, 8:09 PM CDT | Flash Flood Warning | ARX | Crawford, Grant | 6 hr |
| Sep 4, 8:51 PM CDT | Severe Thunderstorm Warning | ARX | Grant | 39 min |
| Sep 5, 1:48 AM CDT | Severe Thunderstorm Warning | ARX | La Crosse, Vernon | 27 min |
| Sep 5, 1:51 AM CDT | Flash Flood Warning | ARX | Grant | 3 hr |
| Sep 5, 1:59 AM CDT | Flash Flood Warning | ARX | Crawford, Grant | 3 hr |
Nearby
Tornado Warnings in Wisconsin, 2012Every tornado warning in 2012Tornadoes 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.