Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 104, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Sep 4, 2012, 6:37 PM CDT for Crawford County, Grant County, Wisconsin; Allamakee County, Clayton County, Iowa. It was in force for 38 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
- Sep 4, 2012, 6:37 PM CDT (23:37 UTC)
- Expired
- Sep 4, 2012, 7:15 PM CDT
- In force
- 38 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
Counties Allamakee County, IA, Clayton County, IA, Crawford County, WI, Grant County, WI
The radar
The La Crosse radar (KARX), 88 km from the middle of the area, began a volume at 23:37 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, 6:46 PM CDT | HAIL 1.25 | Prairie Du Chien, WI | |
| Sep 4, 6:56 PM CDT | HAIL 1 | Brodtville, 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 |
|---|---|---|---|
| Sep 4, 3:27 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 11.6 hours before the alert went out and 165 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
- 1827 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 971 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
735 WUUS53 KARX 042337 SVRARX IAC005-043-WIC023-043-050015- /O.NEW.KARX.SV.W.0104.120904T2337Z-120905T0015Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 637 PM CDT TUE SEP 4 2012 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN ALLAMAKEE COUNTY IN NORTHEAST IOWA... NORTH CENTRAL CLAYTON COUNTY IN NORTHEAST IOWA... SOUTHWESTERN CRAWFORD COUNTY IN SOUTHWEST WISCONSIN... WEST CENTRAL GRANT COUNTY IN SOUTHWEST WISCONSIN... * UNTIL 715 PM CDT * AT 632 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM LOCATED NEAR EFFIGY MOUNDS...OR NEAR PRAIRIE DU CHIEN...MOVING SOUTHEAST AT 15 MPH. THIS STORM CAN PRODUCE LARGE DAMAGING HAIL UP TO GOLF BALL SIZE AND DAMAGING WINDS IN EXCESS OF 60 MPH. TRAINED WEATHER SPOTTERS HAVE ALREADY REPORTED GOLF BALL SIZE HAIL WITH THIS STORM IN MARQUETTE IOWA. * THE SEVERE THUNDERSTORM WILL BE NEAR... PRAIRIE DU CHIEN AND MCGREGOR AROUND 645 PM... WYALUSING STATE PARK AND IRISH RIDGE AROUND 700 PM... BRIDGEPORT AND CLAYTON AROUND 705 PM... JELLYSTONE PARK NEAR BAGLEY AROUND 710 PM... BRODTVILLE AND BAGLEY AROUND 715 PM... 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 4305 9089 4287 9113 4307 9132 4315 9121 TIME...MOT...LOC 2337Z 306DEG 14KT 4306 9119 WIND...HAIL 60MPH 1.75IN $$ AJ
3 follow-up statements
573
WWUS53 KARX 042350
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
650 PM CDT TUE SEP 4 2012
IAC005-043-WIC023-043-050015-
/O.CON.KARX.SV.W.0104.000000T0000Z-120905T0015Z/
ALLAMAKEE IA-CLAYTON IA-CRAWFORD WI-GRANT WI-
650 PM CDT TUE SEP 4 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WEST CENTRAL
GRANT...SOUTHWESTERN CRAWFORD...NORTH CENTRAL CLAYTON AND
SOUTHEASTERN ALLAMAKEE COUNTIES UNTIL 715 PM CDT...
AT 646 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
SEVERE THUNDERSTORM WAS LOCATED NEAR PRAIRIE DU CHIEN...MOVING
SOUTHEAST AT 15 MPH. LOCAL LAW ENFORCEMENT OFFICIALS JUST REPORTED
HALF DOLLAR SIZE HAIL IN PRAIRIE DU CHIEN. THIS STORM CAN PRODUCE
LARGE DAMAGING HAIL UP TO GOLF BALL SIZE...THOUGH...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
WYALUSING STATE PARK AND IRISH RIDGE AROUND 700 PM...
BRIDGEPORT AND CLAYTON AROUND 705 PM...
JELLYSTONE PARK NEAR BAGLEY AROUND 710 PM...
BRODTVILLE AND BAGLEY AROUND 715 PM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. DAMAGING
WINDS ARE ALSO EXPECTED...WHICH WILL UPROOT TREES AND DOWN POWER
LINES. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.
&&
LAT...LON 4305 9089 4287 9113 4298 9124 4307 9132
4315 9121
TIME...MOT...LOC 2349Z 306DEG 14KT 4303 9114
WIND...HAIL 60MPH 1.75IN
$$
AJ696
WWUS53 KARX 050002 RRA
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
702 PM CDT TUE SEP 4 2012
IAC005-050012-
/O.CAN.KARX.SV.W.0104.000000T0000Z-120905T0015Z/
ALLAMAKEE IA-
702 PM CDT TUE SEP 4 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ALLAMAKEE COUNTY
IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT THE WARNED AREA.
HOWEVER...ANOTHER WARNING WILL BE ISSUED SHORTLY FOR SOUTHEASTERN
ALLAMAKEE COUNTY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
TUESDAY EVENING FOR NORTHEASTERN IOWA AND SOUTHEAST MINNESOTA AND
WESTERN WISCONSIN.
LAT...LON 4295 9116 4300 9118 4310 9105 4305 9089
4287 9113
TIME...MOT...LOC 0002Z 306DEG 14KT 4300 9108
$$
IAC043-WIC023-043-050015-
/O.CON.KARX.SV.W.0104.000000T0000Z-120905T0015Z/
CLAYTON IA-CRAWFORD WI-GRANT WI-
702 PM CDT TUE SEP 4 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WEST CENTRAL
GRANT...SOUTHWESTERN CRAWFORD AND EAST CENTRAL CLAYTON COUNTIES UNTIL
715 PM CDT...
AT 700 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR WYALUSING STATE PARK...OR NEAR
PRAIRIE DU CHIEN...MOVING SOUTHEAST AT 15 MPH. THIS STORM CAN PRODUCE
LARGE DAMAGING HAIL UP TO GOLF BALL SIZE AND DAMAGING WINDS IN EXCESS
OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
JELLYSTONE PARK NEAR BAGLEY AROUND 710 PM...
BRODTVILLE AND BAGLEY AROUND 715 PM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. DAMAGING
WINDS ARE ALSO EXPECTED...WHICH WILL UPROOT TREES AND DOWN POWER
LINES. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.
&&
LAT...LON 4295 9116 4300 9118 4310 9105 4305 9089
4287 9113
TIME...MOT...LOC 0002Z 306DEG 14KT 4300 9108
WIND...HAIL 60MPH 1.75IN
$$
AJ242
WWUS53 KARX 050017
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
717 PM CDT TUE SEP 4 2012
IAC043-WIC023-043-050026-
/O.EXP.KARX.SV.W.0104.000000T0000Z-120905T0015Z/
CLAYTON IA-CRAWFORD WI-GRANT WI-
717 PM CDT TUE SEP 4 2012
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL GRANT...
SOUTHWESTERN CRAWFORD AND EAST CENTRAL CLAYTON COUNTIES HAS
EXPIRED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA. HOWEVER...ANOTHER SEVERE THUNDERSTORM WARNING WILL LIKELY BE
REQUIRED FOR NORTHERN GRANT COUNTY WITH STORMS DROPPING SOUTH
THROUGH CRAWFORD AND RICHLAND COUNTIES.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
TUESDAY EVENING FOR NORTHEASTERN IOWA AND SOUTHWESTERN WISCONSIN.
LAT...LON 4295 9116 4300 9118 4310 9105 4305 9089
4287 9113
TIME...MOT...LOC 0002Z 306DEG 14KT 4300 9108
$$
AJThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 4:39 AM CDT | Dense Fog Advisory | ARX | Adams, Buffalo, Clark, Crawford, Grant, Jackson and 7 more | 4 hr |
| Sep 4, 4:29 PM CDT | Severe Thunderstorm Warning | ARX | Buffalo | 46 min |
| Sep 4, 5:17 PM CDT | Severe Thunderstorm Warning | ARX | Vernon | 28 min |
| Sep 4, 5:41 PM CDT | Severe Thunderstorm Warning | ARX | Clark | 64 min |
| Sep 4, 5:56 PM CDT | Severe Thunderstorm Warning | ARX | La Crosse, Vernon | 64 min |
| Sep 4, 6:16 PM CDT | Severe Thunderstorm Warning | ARX | Clark | 29 min |
| Sep 4, 6:48 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Vernon | 57 min |
| Sep 4, 6:09 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee, Clayton | 36 min |
| Sep 4, 6:38 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 52 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2012Severe Thunderstorm Warnings in Iowa, 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.