A cold front pushed into eastern Minnesota and northern Iowa in the early morning hours of July 11th leading to severe thunderstorms. The severe thunderstorms knocked down trees, flattened corn and damaged a roof at a business in Dickeyville (Grant County).
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS ARX wrote it up.
A cold front pushed into eastern Minnesota and northern Iowa in the early morning hours of July 11th leading to severe thunderstorms. The severe thunderstorms knocked down trees, flattened corn and damaged a roof at a business in Dickeyville (Grant County).
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS La Crosse, WI wrote its last area forecast discussion before the first event at Jul 10, 8:24 PM CST, 5 hours earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LA CROSSE WI 924 PM CDT SUN JUL 10 2011 .UPDATED... LINE OF SEVERE CONVECTION CURRENTLY TRACKING THROUGH CENTRAL MINNESOTA. AT THE CURRENT TIME...DISTANCE/SPEED TOOL INDICATES THIS LINE APPROACHING THE FAR WESTERN COUNTIES BETWEEN 11 PM AND MIDNIGHT. THIS LINE HAS BEEN PRODUCING DAMAGING WIND GUSTS ALONG WITH ISOLATED TORNADOES AS FAVORABLE SOUTHEAST WINDS FEEDING INTO THE LINE. THE 00Z KMPX SOUNDING SHOWED NEARLY 1700 J/KG OF MIXED LAYER CAPE ALONG WITH 45 KNOTS OF DEEP SHEAR SHEAR. THE SOUNDING ALSO SHOWS A RELATIVELY DRY 850MB-500MB LAYER. 00Z RUC SHOWING MODEST MOISTURE TRANSPORT INTO THE LINE. VARIOUS MESO-MODELS CONTINUE TO SHOW CONVECTION TO TRACK THROUGH THE FORECAST AREA OVERNIGHT. ALTHOUGH THE 23Z HRRR SHOWS THE LINE COMING THROUGH THE FORECAST AREA...IT HAS IT ON A WEAKENING TREND. STILL EXPECT IT TO PACK A PUNCH AS IT SWEEPS THROUGH THE AREA OVERNIGHT WITH THE MAIN THREAT FOR THE FORECAST AREA BEING MAINLY WIND AND POSSIBLY HAIL. IF STORMS CONTINUE THEIR CURRENT INTENSITY WOULD NOT BE SURPRISED TO SEE A WATCH IN THE NEXT SEVERAL HOURS. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...NONE. MN...NONE. IA...NONE. && RABERDING
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LA CROSSE WI 159 PM CDT SUN JUL 10 2011 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-032>034- 041>044-053>055-061-111200- ADAMS-ALLAMAKEE-BUFFALO-CHICKASAW-CLARK-CLAYTON-CRAWFORD-DODGE- FAYETTE-FILLMORE-FLOYD-GRANT-HOUSTON-HOWARD-JACKSON-JUNEAU-LA CROSSE- MITCHELL-MONROE-MOWER-OLMSTED-RICHLAND-TAYLOR-TREMPEALEAU-VERNON- WABASHA-WINNESHIEK-WINONA- 159 PM CDT SUN JUL 10 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF NORTHEAST IOWA... SOUTHEAST MINNESOTA...AND SOUTHWEST INTO CENTRAL WISCONSIN. .DAY ONE...TONIGHT THUNDERSTORMS ARE EXPECTED TO DEVELOP INTO NORTHEAST SOUTH DAKOTA AND SOUTHEAST NORTH DAKOTA BY EARLY THIS EVENING. THESE THUNDERSTORMS ARE THEN EXPECTED TO ORGANIZE INTO A LINE AND MOVE EAST AND SOUTHEAST ACROSS MINNESOTA AND WISCONSIN TONIGHT...REACHING THE AREA DURING THE LATER EVENING AND OVERNIGHT HOURS. SOME OF THESE STORMS MAY BE STRONG TO SEVERE. DAMAGING WINDS...HEAVY DOWNPOURS AND FREQUENT LIGHTENING ARE EXPECTED TO BE THE MAIN THREATS. THE MAIN THREAT TIME APPEARS TO BE BETWEEN 9 PM AND 4 AM. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY SCATTERED THUNDERSTORMS ARE EXPECTED MONDAY AS A COLD FRONT MOVES SOUTH ACROSS THE AREA. THERE IS A CONTINUED POTENTIAL FOR SEVERE STORMS...MAINLY SOUTH OF INTERSTATE 90. DAMAGING WINDS AND HEAVY RAIN WOULD BE THE MAIN THREATS. ALSO...PLAN ON HEAT INDICES OF 95 TO 100 MAINLY SOUTH OF INTERSTATE 90 ON MONDAY. PERIODIC THUNDERSTORM CHANCES CONTINUE TUESDAY THROUGH SATURDAY... WITH A BREAK LIKELY WEDNESDAY INTO WEDNESDAY NIGHT. THERE MAY BE A RISK OF SEVERE WEATHER WITH A FEW OF THE STORMS THURSDAY AFTERNOON AND EVENING AS A WARM FRONT LIFTS NORTH ACROSS THE REGION. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TONIGHT...ROUGHLY BETWEEN THE HOURS OF 9 PM AND 4 AM. SPOTTER ACTIVATION MAY BE NEEDED AGAIN MONDAY AFTERNOON...MAINLY SOUTH OF INTERSTATE 90. .EMERGENCY MANAGEMENT COORDINATION... NO WEBINAR IS SCHEDULED. RRS/AJ
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
1201 AM CDT MON JUL 11 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1158 PM TSTM WND GST WEST CONCORD 44.15N 92.90W
07/10/2011 M80 MPH DODGE MN TRAINED SPOTTER
WIND GUSTS MEASURED 80 TO 100 MPH.
&&
04PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
1223 AM CDT MON JUL 11 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1220 AM TSTM WND GST 1 W BYRON 44.03N 92.67W
07/11/2011 M50 MPH OLMSTED MN TRAINED SPOTTER
&&
04SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 1228 AM CDT MON JUL 11 2011 WIZ017-029-033-034-110630- CLARK-JACKSON-TAYLOR-TREMPEALEAU- 1228 AM CDT MON JUL 11 2011 ...STRONG TO SEVERE THUNDERSTORMS EXPECTED BY 2 AM... AT 1222 AM...DOPPLER RADAR INDICATED STRONG TO SEVERE THUNDERSTORMS FROM 25 MILES NORTHWEST OF JUMP RIVER TO NEAR EAU CLAIRE...MOVING EAST AT 45 TO 50 MPH. THESE STORMS HAVE A HISTORY OF DAMAGING WINDS IN EXCESS OF 60 MPH. WARNINGS MAY BE NEEDED AS THESE STORMS GET CLOSER THESE STORMS ARE EXPECTED TO EXTEND FROM NEAR MEDFORD...TO WHITEHALL BY 130 AM. RABERDING
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 1253 AM CDT MON JUL 11 2011 IAZ009-MNZ087-088-095-096-WIZ041-053-110645- FILLMORE-HOUSTON-HOWARD-LA CROSSE-OLMSTED-VERNON-WINONA- 1253 AM CDT MON JUL 11 2011 AT 1250 AM...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS FROM 9 MILES NORTHWEST OF LOCK AND DAM 5 TO 11 MILES SOUTH OF OSTRANDER... MOVING SOUTHEAST AT 40 MPH. WIND GUSTS OF 40 TO 50 MPH MAY ACCOMPANY THESE STRONG THUNDERSTORMS. SEVERE WEATHER HAS BEEN REPORTED WITH THESE STORMS AND WARNINGS MAY STILL BE NEEDED IF THESE STORMS STRENGTHENING. THESE STORMS BEGIN TO AFFECT THE WINONA AREA AROUND 145 AM AND CALEDONIA AND LA CROSSE AREA AROUND 2 AM. RABERDING
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 130 AM CDT MON JUL 11 2011 MNZ088-WIZ017-029-032>034-110730- BUFFALO-CLARK-JACKSON-TAYLOR-TREMPEALEAU-WINONA- 130 AM CDT MON JUL 11 2011 AT 127 AM...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS FROM CHELSEA WISCONSIN TO NEAR WINONA MINNESOTA...MOVING EAST AT 35 TO 40 MPH. WIND GUSTS OF 40 TO 50 MPH MAY ACCOMPANY THESE STRONG THUNDERSTORMS. LOCATIONS THAT MAY BE AFFECTED INCLUDE... TREMPEALEAU...GALESVILLE...WESTBORO...OWEN...CHELSEA...MEDFORD...RIB LAKE AND GREENWOOD. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM MONDAY MORNING FOR NORTHEASTERN IOWA AND SOUTHEAST MINNESOTA AND WEST CENTRAL WISCONSIN. RABERDING
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 152 AM CDT MON JUL 11 2011 IAZ010-011-019-MNZ079-088-095-096-WIZ017-029-032>034-041>044-053>055- 110845- ADAMS-ALLAMAKEE-BUFFALO-CHICKASAW-CLARK-CRAWFORD-FILLMORE-HOUSTON- JACKSON-JUNEAU-LA CROSSE-MONROE-RICHLAND-TAYLOR-TREMPEALEAU-VERNON-WABASHA-WINNESHIEK- WINONA- 152 AM CDT MON JUL 11 2011 AT 152 AM...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS FROM THE TAYLOR COUNTY AIRPORT TO NEAR LA CROSSE...TO DECORAH IOWA...MOVING SOUTHEAST AT 35 TO 40 MPH MPH. WIND GUSTS OF 40 TO 50 MPH MAY ACCOMPANY THESE STRONG THUNDERSTORMS. LOCATIONS THAT MAY BE AFFECTED INCLUDE... DECORAH...LA CRESCENT...LA CROSSE...OSSIAN...BROWNSVILLE...STODDARD AND MILLSTON. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM MONDAY MORNING FOR NORTHEASTERN IOWA AND SOUTHEAST MINNESOTA AND PORTIONS OF WEST CENTRAL WISCONSIN. RABERDING
The La Crosse radar (KARX), 30 km away, was scanning. The volume nearest the first event began at 07:23 UTC.
4 thunderstorm wind. Local standard time, as filed.
A few 18 inch diameter trees were blown down in Leon.
Trees were blown down in Necedah and the township of Germantown.
Trees were blown down in the township of Jackson.
High winds from severe thunderstorms created considerable damage from Keiler and Dickeyville east to Cuba City and Hazel Green. Farm buildings were damaged and corn was flattened along County Roads H and Z. Between Keiler and Cuba City, numerous homes had siding and shingles blown off or were damaged by falling trees. More than three dozen trees were blown down, a barn was destroyed and several buildings received minor damage along Banfield and Indian Creek Roads. In Dickeyville, a roof was torn off, a side wall of a building knocked down and trees were uprooted or snapped off. North of Hazel Green, a machine shed was destroyed. Numerous power lines were blown down causing power outages over a large portion of southern Grant County.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2011Every state in 2011This day in weather historyWarnings in Wisconsin, July 2011
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 323263, 323266, 323267, 323271.