Alert archive / Wisconsin / Tornado Warnings in 2011

Tornado Warning 3, NWS La Crosse, WI

April 10, 2011La Crosse County, Vernon County, Wisconsin; Houston County, Minnesota

NWS La Crosse, WI issued this tornado warning at Apr 10, 2011, 4:32 PM CDT for La Crosse County, Vernon County, Wisconsin; Houston County, Minnesota. It was in force for 43 min. 17 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 10, 2011, 4:32 PM CDT (21:32 UTC)
Expired
Apr 10, 2011, 5:15 PM CDT
In force
43 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon

Counties Houston County, MN, La Crosse County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 12 km from the middle of the area, began a volume at 21:33 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

TimeReportWhereRemark
Apr 10, 4:32 PM CDTTSTM WND DMGCaledonia, MNBARN DOWN JUST OUTSIDE CALEDONIA
Apr 10, 4:38 PM CDTTSTM WND DMGBlack Hammer, MNSEVERAL TREES DOWN ALONG COUNTY ROAD 19. POSSIBLE TORNADO TOUCHDOWN. DEPUTY ON THE WAY TO INVESTIGATE.
Apr 10, 4:42 PM CDTHAIL 2.752 E Hokah, MN
Apr 10, 4:42 PM CDTHAIL 3Hokah, MNHAIL COVERING THE GROUND WITH SOME TREES DOWN.
Apr 10, 4:44 PM CDTHAIL 11 Ne Hokah, MNALSO 0.50 INCHES OF RAIN IN LESS THAN 5 MINUTES AND VERY STRONG WINDS. POWER WENT OUT.
Apr 10, 4:44 PM CDTHAIL 11 S Hokah, MNALSO 0.50 INCHES OF RAIN IN LESS THAN 5 MINUTES AND VERY STRONG WINDS. POWER WENT OUT.
Apr 10, 4:45 PM CDTTSTM WND DMG5 N Caledonia, MNBARN DOWN AND TRAILER BLOWN OFF ITS FOUNDATION.
Apr 10, 4:45 PM CDTHAIL 1.753 Nw Brownsville, MN
Apr 10, 4:51 PM CDTTSTM WND GST 602 S La Crosse, WI
Apr 10, 4:51 PM CDTHAIL 1.52 S La Crosse, WIHALF DOLLAR SIZE HAIL
Apr 10, 4:52 PM CDTHAIL 12 S La Crosse, WION WARD AVENUE IN SOUTH LA CROSSE
Apr 10, 4:53 PM CDTHAIL 22 S La Crosse, WIEXTENSIVE HAIL DAMAGE ON THE SOUTH SIDE OF LA CROSSE NEAR WAL MART. WINDOWS BROKEN AND SIDING DAMAGED TO AN ESTIMATED 10 TO 15 HOMES. SEVERAL VEHICLES ALSO DAMAGED WITH DENTS AND BROKEN WINDOWS AND MIRRORS.
Apr 10, 4:53 PM CDTHAIL 2.53 Se La Crosse, WIAT SOUTHERN BLUFFS SCHOOL
Apr 10, 4:54 PM CDTHAIL 1.753 E La Crosse, WIAT NWS OFFICE
Apr 10, 4:54 PM CDTHAIL 22 S La Crosse, WISOUTH SIDE
Apr 10, 4:55 PM CDTHAIL 1.753 E La Crosse, WIAT HWY 14 AND CTH MM
Apr 10, 4:56 PM CDTTSTM WND GST 521 E La Crosse, WIAT NWS OFFICE

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.

IssuedProductOfficeLasted
Apr 10, 3:19 PM CDTTornado Watch PDSSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.5 hours before the alert went out and 228 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.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2011-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 552 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2011-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 528 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
552 J/kg
Mixed-layer CIN
-270 J/kg
Mixed-layer LCL
643 m above ground
0-6 km bulk shear
80 kt
0-1 km storm-relative helicity
528 m²/s²
0-3 km storm-relative helicity
499 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

975 
WFUS53 KARX 102132
TORARX
MNC055-WIC063-123-102215-
/O.NEW.KARX.TO.W.0003.110410T2132Z-110410T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
432 PM CDT SUN APR 10 2011

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* TORNADO WARNING FOR...
  HOUSTON COUNTY IN SOUTHEAST MINNESOTA...
  NORTHWESTERN VERNON COUNTY IN SOUTHWEST WISCONSIN...
  SOUTHERN LA CROSSE COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 515 PM CDT

* AT 428 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO NEAR WILLINGTON GROVE...OR 5 MILES WEST OF CALEDONIA...
  MOVING NORTHEAST AT 55 MPH. THIS TORNADO WARNING UPGRADES THE
  PREVIOUS SEVERE THUNDERSTORM WARNING FOR HOUSTON...LA CROSSE AND
  VERNON COUNTIES.

* THE TORNADO WILL BE NEAR...
  HIGHWAY 44 AND SANDEN ROAD AROUND 435 PM...
  COUNTY ROADS 3 AND 24 AND FREEBURG AROUND 440 PM...
  BROWNSVILLE AND HOKAH AROUND 445 PM...
  LA CROSSE AND MAPLE GROVE AROUND 450 PM...
  HIGHWAY 33 AND COUNTY O A AND IRISH HILL AROUND 455 PM...
  THE COULEE EXPERIMENTAL FOREST AND BARRE MILLS AROUND 500 PM...
  BANGOR AND I 90 EXIT 15 AROUND 505 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM SUNDAY EVENING FOR
NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND WESTERN WISCONSIN.

&&

LAT...LON 4374 9092 4350 9161 4366 9172 4395 9091
TIME...MOT...LOC 2132Z 242DEG 49KT 4364 9152

$$

RIECK
6 follow-up statements
171 
WWUS53 KARX 102139
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
439 PM CDT SUN APR 10 2011

MNC055-WIC063-123-102215-
/O.CON.KARX.TO.W.0003.000000T0000Z-110410T2215Z/
HOUSTON MN-LA CROSSE WI-VERNON WI-
439 PM CDT SUN APR 10 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN VERNON...
SOUTHERN LA CROSSE AND CENTRAL HOUSTON COUNTIES UNTIL 515 PM CDT...

AT 437 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
TORNADO LOCATED NEAR HIGHWAY 44 AND SANDEN ROAD...OR NEAR
CALEDONIA...MOVING NORTHEAST AT 55 MPH. IN ADDITION TO A TORNADO...
THIS STORM CAN PRODUCE QUARTER SIZE HAIL AND DESTRUCTIVE WINDS IN
EXCESS OF 70 MPH.

* THE TORNADO WILL BE NEAR...
  BROWNSVILLE AND HOKAH AROUND 445 PM...
  MAPLE GROVE AND GOOSE ISLAND AROUND 450 PM...
  THE COULEE EXPERIMENTAL FOREST AND ST JOSEPH AROUND 500 PM...      
  BANGOR AND MIDDLE RIDGE AROUND 505 PM...
  ROCKLAND AROUND 510 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.

TORRENTIAL RAINFALL FROM THESE STORMS MAY ALSO CAUSE THE PONDING OF
WATER ON ROADWAYS AND LOCALIZED FLOODING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM SUNDAY EVENING FOR
NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND WESTERN WISCONSIN.

&&

LAT...LON 4355 9150 4369 9156 4395 9091 4374 9092
TIME...MOT...LOC 2139Z 242DEG 49KT 4368 9140

$$

DTJ
851 
WWUS53 KARX 102144
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
444 PM CDT SUN APR 10 2011

MNC055-WIC063-123-102215-
/O.CON.KARX.TO.W.0003.000000T0000Z-110410T2215Z/
HOUSTON MN-LA CROSSE WI-VERNON WI-
444 PM CDT SUN APR 10 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN VERNON...
SOUTHERN LA CROSSE AND EAST CENTRAL HOUSTON COUNTIES UNTIL 515 PM
CDT...

LAW ENFORCEMENT REPORTED SEVERAL TREES DOWN ALONG COUNTY ROAD 19 
NEAR BLACK HAMMER IN HOUSTON COUNTY.

AT 442 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
SEVERE THUNDERSTORM WAS LOCATED NEAR COUNTY ROADS 3 AND 24...OR 9
MILES NORTHEAST OF CALEDONIA...MOVING NORTHEAST AT 55 MPH. IN
ADDITION TO A TORNADO...THIS STORM CAN PRODUCE QUARTER SIZE HAIL AND
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.

* THE TORNADO WILL BE NEAR...
  GOOSE ISLAND AND MAPLE GROVE AROUND 450 PM...
  HIGHWAY 33 AND COUNTY O A AND IRISH HILL AROUND 455 PM...
  ST JOSEPH AND THE COULEE EXPERIMENTAL FOREST AROUND 500 PM...
  BANGOR AND MIDDLE RIDGE AROUND 505 PM...
  ROCKLAND AROUND 510 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.

TORRENTIAL RAINFALL FROM THESE STORMS MAY ALSO CAUSE THE PONDING OF
WATER ON ROADWAYS AND LOCALIZED FLOODING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM SUNDAY EVENING FOR
NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND WESTERN WISCONSIN.

&&

LAT...LON 4361 9136 4372 9147 4395 9091 4374 9092
TIME...MOT...LOC 2144Z 242DEG 49KT 4370 9131

$$

DTJ
306 
WWUS53 KARX 102154
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
454 PM CDT SUN APR 10 2011

MNC055-WIC063-123-102215-
/O.CON.KARX.TO.W.0003.000000T0000Z-110410T2215Z/
HOUSTON MN-LA CROSSE WI-VERNON WI-
454 PM CDT SUN APR 10 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN VERNON...
SOUTHERN LA CROSSE AND EAST CENTRAL HOUSTON COUNTIES UNTIL 515 PM
CDT...

TRAINED WEATHER SPOTTERS REPORTED GOLF BALL SIZE HAIL AND WINDS OF 
60 MPH  3NW BROWNSVILLE IN HOUSTON COUNTY.

AT 451 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
SEVERE THUNDERSTORM WAS LOCATED NEAR GOOSE ISLAND...OR 6 MILES SOUTH
OF LA CROSSE...MOVING NORTHEAST AT 45 MPH. IN ADDITION TO A
TORNADO...THIS STORM CAN PRODUCE PING PONG BALL SIZE HAIL AND
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.

* THE TORNADO WILL BE NEAR...
  HIGHWAY 33 AND COUNTY O A AND BARRE MILLS AROUND 500 PM...
  ST JOSEPH AND THE COULEE EXPERIMENTAL FOREST AROUND 505 PM...
  BANGOR AND MIDDLE RIDGE AROUND 510 PM...
  ROCKLAND AROUND 515 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.

TORRENTIAL RAINFALL FROM THESE STORMS MAY ALSO CAUSE THE PONDING OF
WATER ON ROADWAYS AND LOCALIZED FLOODING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM SUNDAY EVENING FOR
NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND WESTERN WISCONSIN.

&&

LAT...LON 4363 9128 4374 9139 4395 9091 4374 9092
TIME...MOT...LOC 2153Z 244DEG 40KT 4375 9119

$$

DTJ
172 
WWUS53 KARX 102158
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
458 PM CDT SUN APR 10 2011

MNC055-WIC123-102208-
/O.CAN.KARX.TO.W.0003.000000T0000Z-110410T2215Z/
HOUSTON MN-VERNON WI-
458 PM CDT SUN APR 10 2011

...THE TORNADO WARNING FOR NORTHWESTERN VERNON AND EAST CENTRAL
HOUSTON COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SUNDAY EVENING
FOR NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND WESTERN WISCONSIN.

LAT...LON 4374 9092 4372 9123 4373 9126 4378 9125
      4395 9091
TIME...MOT...LOC 2158Z 244DEG 40KT 4377 9112

$$

WIC063-102215-
/O.CON.KARX.TO.W.0003.000000T0000Z-110410T2215Z/
LA CROSSE WI-
458 PM CDT SUN APR 10 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN LA CROSSE
COUNTY UNTIL 515 PM CDT...

NATIONAL WEATHER SERVICE EMPLOYEES REPORTED GOLF BALL SIZE HAIL AT 
THE NATIONAL WEATHER SERVICE OFFICE.

AT 456 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
SEVERE THUNDERSTORM WAS LOCATED NEAR THE TOP OF 10 MILE HILL...OR 7
MILES SOUTHEAST OF LA CROSSE...MOVING NORTHEAST AT 45 MPH. IN
ADDITION TO A TORNADO...THIS STORM CAN PRODUCE LARGE DAMAGING HAIL UP
TO GOLF BALL SIZE AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.

* THE TORNADO WILL BE NEAR...
  ST JOSEPH AND NEWBURG CORNERS AROUND 505 PM...
  BANGOR AND MIDDLE RIDGE AROUND 510 PM...
  ROCKLAND AROUND 515 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.

TORRENTIAL RAINFALL FROM THESE STORMS MAY ALSO CAUSE THE PONDING OF
WATER ON ROADWAYS AND LOCALIZED FLOODING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM SUNDAY EVENING FOR
NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND WESTERN WISCONSIN.

&&

LAT...LON 4374 9092 4372 9123 4373 9126 4378 9125
      4395 9091
TIME...MOT...LOC 2158Z 244DEG 40KT 4377 9112

$$

DTJ
045 
WWUS53 KARX 102206
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
506 PM CDT SUN APR 10 2011

WIC063-102215-
/O.CON.KARX.TO.W.0003.000000T0000Z-110410T2215Z/
LA CROSSE WI-
506 PM CDT SUN APR 10 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN LA CROSSE
COUNTY UNTIL 515 PM CDT...

AT 500 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
TORNADO LOCATED NEAR ST JOSEPH...OR 9 MILES EAST OF LA CROSSE...
MOVING NORTHEAST AT 65 MPH. IN ADDITION TO A TORNADO...THIS STORM CAN
PRODUCE LARGE DAMAGING HAIL UP TO GOLF BALL SIZE AND DESTRUCTIVE
WINDS IN EXCESS OF 70 MPH.

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.

TORRENTIAL RAINFALL FROM THESE STORMS MAY ALSO CAUSE THE PONDING OF
WATER ON ROADWAYS AND LOCALIZED FLOODING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM SUNDAY EVENING FOR
NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND WESTERN WISCONSIN.

&&

LAT...LON 4374 9092 4373 9114 4383 9115 4395 9091
TIME...MOT...LOC 2206Z 247DEG 57KT 4382 9094

$$

DTJ
451 
WWUS53 KARX 102213
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
513 PM CDT SUN APR 10 2011

WIC063-102223-
/O.EXP.KARX.TO.W.0003.000000T0000Z-110410T2215Z/
LA CROSSE WI-
513 PM CDT SUN APR 10 2011

...THE TORNADO WARNING FOR SOUTHEASTERN LA CROSSE COUNTY WILL EXPIRE
AT 515 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SUNDAY EVENING
FOR NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND WESTERN WISCONSIN.

LAT...LON 4374 9092 4373 9114 4383 9115 4395 9091
TIME...MOT...LOC 2213Z 247DEG 57KT 4386 9080

$$

RIECK

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 10, 10:58 AM CDTRiver Flood WarningARXBuffalo, Trempealeau57 hr
Apr 10, 3:46 PM CDTSevere Thunderstorm WarningARXBuffalo29 min
Apr 10, 4:16 PM CDTSevere Thunderstorm WarningARXBuffalo29 min
Apr 10, 4:24 PM CDTSevere Thunderstorm WarningARXBuffalo, Jackson, Trempealeau41 min
Apr 10, 5:03 PM CDTSevere Thunderstorm WarningARXVernon27 min
Apr 10, 5:04 PM CDTSevere Thunderstorm WarningARXJuneau, Monroe26 min
Apr 10, 5:09 PM CDTTornado WarningARXClark, Taylor66 min
Apr 10, 5:13 PM CDTTornado WarningARXMonroe47 min
Apr 10, 5:39 PM CDTSevere Thunderstorm WarningARXAdams, Jackson, Juneau, Monroe66 min
Apr 10, 5:56 PM CDTSevere Thunderstorm WarningARXAdams, Juneau, Monroe64 min
Apr 10, 6:12 PM CDTTornado WarningARXTaylor33 min
Apr 10, 6:16 PM CDTTornado WarningARXAdams, Juneau44 min
Apr 10, 6:57 PM CDTTornado WarningARXAdams, Juneau33 min
Apr 9, 11:08 PM CDTSevere Thunderstorm WarningARXMower52 min
Apr 9, 11:15 PM CDTSevere Thunderstorm WarningARXFillmore45 min
Apr 10, 1:44 AM CDTAreal Flood AdvisoryARXFillmore, Houston, Mower, Olmsted, Winona3 hr
Apr 10, 3:39 PM CDTSevere Thunderstorm WarningARXFillmore41 min
Apr 10, 4:11 PM CDTSevere Thunderstorm WarningARXFillmore, Houston34 min

Nearby

Tornado Warnings in Wisconsin, 2011Tornado Warnings in Minnesota, 2011Every tornado warning in 2011Tornadoes 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.