Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 7, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Apr 9, 2011, 11:08 PM CDT for Mower County, Minnesota; Mitchell County, Iowa. It was in force for 52 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
- Apr 9, 2011, 11:08 PM CDT (04:08 UTC)
- Expired
- Apr 10, 2011, 12:00 AM CDT
- In force
- 52 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Mitchell County, IA, Mower County, MN
The radar
The La Crosse radar (KARX), 136 km from the middle of the area, began a volume at 04:08 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 |
|---|---|---|---|
| Apr 9, 11:20 PM CDT | HAIL 2 | St. Ansgar, IA | |
| Apr 9, 11:24 PM CDT | HAIL 0.88 | Carpenter, IA |
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 |
|---|---|---|---|
| Apr 9, 7:42 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 9, 11:01 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 4.1 hours before the alert went out and 154 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 612 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 355 m²/s²
- 0-3 km storm-relative helicity
- 550 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.2
The text
As transmitted, in the capitals the NWS used until 2016.
681
WUUS53 KARX 100408
SVRARX
IAC131-MNC099-100500-
/O.NEW.KARX.SV.W.0007.110410T0408Z-110410T0500Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1108 PM CDT SAT APR 9 2011
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN MITCHELL COUNTY IN NORTH CENTRAL IOWA...
MOWER COUNTY IN SOUTHEAST MINNESOTA...
* UNTIL MIDNIGHT CDT
* AT 1103 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR CARPENTER...OR 16 MILES NORTHWEST
OF OSAGE...MOVING NORTHEAST AT 45 MPH. THIS STORM CAN PRODUCE
QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. TRAINED
WEATHER SPOTTERS REPORTED NICKLE SIZE HAIL WITH THIS STORM.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
LYLE AND OTRANTO PARK AROUND 1115 PM...
STACYVILLE AND JOHNSBURG AROUND 1125 PM...
ROSE CREEK AROUND 1130 PM...
ADAMS AND I 90 EXIT 187 AROUND 1135 PM...
TAOPI AND ELKTON AROUND 1140 PM...
COUNTY ROADS 4 AND 8 AND LAKE LOUISE STATE PARK AROUND 1145 PM...
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.
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS OCCASIONALLY PRODUCE TORNADOES...AND CAN DO SO QUICKLY.
MOVE INTO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR
BUSINESS.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM SUNDAY MORNING FOR
NORTHEASTERN IOWA AND SOUTHEAST MINNESOTA AND SOUTHWESTERN WISCONSIN.
&&
LAT...LON 4380 9267 4354 9246 4331 9303 4349 9303
4350 9305 4355 9305
TIME...MOT...LOC 0408Z 236DEG 38KT 4342 9303
WIND...HAIL 60MPH 1.00IN
$$
HALBACH4 follow-up statements
754
WWUS53 KARX 100424
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1124 PM CDT SAT APR 9 2011
IAC131-MNC099-100500-
/O.CON.KARX.SV.W.0007.000000T0000Z-110410T0500Z/
MITCHELL IA-MOWER MN-
1124 PM CDT SAT APR 9 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MOWER AND
NORTHWESTERN MITCHELL COUNTIES UNTIL MIDNIGHT CDT...
AT 1122 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR LYLE...OR 13 MILES SOUTHEAST OF
AUSTIN...MOVING NORTHEAST AT 45 MPH. THIS STORM CAN PRODUCE QUARTER
SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
ROSE CREEK AROUND 1130 PM...
ADAMS AND I 90 EXIT 187 AROUND 1135 PM...
TAOPI AND ELKTON AROUND 1140 PM...
COUNTY ROADS 4 AND 8 AND LAKE LOUISE STATE PARK AROUND 1145 PM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE
AND STAY AWAY FROM WINDOWS.
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS OCCASIONALLY PRODUCE TORNADOES...AND CAN DO SO QUICKLY.
MOVE INTO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR
BUSINESS.
&&
LAT...LON 4380 9267 4354 9246 4331 9303 4349 9303
4350 9305 4355 9305
TIME...MOT...LOC 0424Z 236DEG 38KT 4351 9283
WIND...HAIL 60MPH 1.00IN
$$
HALBACH081
WWUS53 KARX 100429
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1129 PM CDT SAT APR 9 2011
IAC131-MNC099-100500-
/O.CON.KARX.SV.W.0007.000000T0000Z-110410T0500Z/
MITCHELL IA-MOWER MN-
1129 PM CDT SAT APR 9 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MOWER AND
NORTHWESTERN MITCHELL COUNTIES UNTIL MIDNIGHT CDT...
LOCAL LAW ENFORCEMENT OFFICIALS REPORTED NICKLE SIZE HAIL IN
CARPENTER WITH THESE THUNDERSTORMS.
AT 1126 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR STACYVILLE...OR 13 MILES NORTH OF
OSAGE...MOVING NORTHEAST AT 40 MPH. THIS STORM CAN PRODUCE QUARTER
SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
ROSE CREEK AROUND 1135 PM...
ADAMS AND I 90 EXIT 187 AROUND 1140 PM...
TAOPI AND ELKTON AROUND 1145 PM...
COUNTY ROADS 4 AND 8 AND LAKE LOUISE STATE PARK AROUND 1150 PM...
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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM SUNDAY MORNING FOR
NORTHEASTERN IOWA AND SOUTHEAST MINNESOTA AND SOUTHWESTERN WISCONSIN.
&&
LAT...LON 4380 9267 4354 9246 4331 9303 4349 9303
4350 9305 4355 9305
TIME...MOT...LOC 0429Z 240DEG 33KT 4349 9281
WIND...HAIL 60MPH 1.00IN
$$
HALBACH242 WWUS53 KARX 100442 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 1142 PM CDT SAT APR 9 2011 IAC131-MNC099-100500- /O.CON.KARX.SV.W.0007.000000T0000Z-110410T0500Z/ MITCHELL IA-MOWER MN- 1142 PM CDT SAT APR 9 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN MOWER AND NORTHEASTERN MITCHELL COUNTIES UNTIL MIDNIGHT CDT... LOCAL LAW ENFORCEMENT OFFICIALS REPORTED NICKLE SIZE HAIL IN CARPENTER WITH THESE THUNDERSTORMS. AT 1140 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM LOCATED NEAR ADAMS...OR 17 MILES SOUTHEAST OF AUSTIN...MOVING NORTHEAST AT 40 MPH. THIS STORM CAN PRODUCE QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... COUNTY ROADS 4 AND 8 AND LAKE LOUISE STATE PARK AROUND 1150 PM... PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM SUNDAY MORNING FOR NORTHEASTERN IOWA AND SOUTHEAST MINNESOTA AND SOUTHWESTERN WISCONSIN. && LAT...LON 4373 9278 4380 9267 4354 9246 4338 9286 TIME...MOT...LOC 0442Z 240DEG 33KT 4355 9267 WIND...HAIL 60MPH 1.00IN $$ HALBACH
060 WWUS53 KARX 100453 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 1153 PM CDT SAT APR 9 2011 IAC131-MNC099-100503- /O.EXP.KARX.SV.W.0007.000000T0000Z-110410T0500Z/ MITCHELL IA-MOWER MN- 1153 PM CDT SAT APR 9 2011 ...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MOWER AND NORTHEASTERN MITCHELL COUNTIES WILL EXPIRE AT MIDNIGHT CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS. HOWEVER...THE STORM REMAINS STRONG AND COULD PRODUCE SMALL HAIL AND GUSTY WINDS...IN ADDITION TO LIGHTNING AND HEAVY RAIN. A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM CDT SUNDAY MORNING FOR NORTHEASTERN IOWA AND SOUTHEAST MINNESOTA AND SOUTHWESTERN WISCONSIN. LAT...LON 4373 9278 4380 9267 4354 9246 4338 9286 TIME...MOT...LOC 0453Z 240DEG 33KT 4360 9255 $$ HALBACH
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 11:15 PM CDT | Severe Thunderstorm Warning | ARX | Fillmore | 45 min |
| Apr 10, 1:44 AM CDT | Areal Flood Advisory | ARX | Fillmore, Houston, Mower, Olmsted, Winona | 3 hr |
| Apr 10, 3:39 PM CDT | Severe Thunderstorm Warning | ARX | Fillmore | 41 min |
| Apr 10, 4:11 PM CDT | Severe Thunderstorm Warning | ARX | Fillmore, Houston | 34 min |
| Apr 10, 4:24 PM CDT | Severe Thunderstorm Warning | ARX | Winona | 41 min |
| Apr 10, 4:32 PM CDT | Tornado Warning | ARX | Houston | 43 min |
| Apr 10, 5:03 PM CDT | Severe Thunderstorm Warning | ARX | Houston | 27 min |
| Apr 9, 10:53 PM CDT | Tornado Warning | ARX | Chickasaw, Floyd, Howard, Mitchell | 37 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2011Severe Thunderstorm Warnings in Iowa, 2011Every severe thunderstorm warning in 2011
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.