A line of thunderstorms ahead of a cold front moved quickly over parts of north central Wisconsin during the morning hours of September 2nd. The thunderstorms produced damaging winds and knocked down trees over parts of Taylor County.
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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 line of thunderstorms ahead of a cold front moved quickly over parts of north central Wisconsin during the morning hours of September 2nd. The thunderstorms produced damaging winds and knocked down trees over parts of Taylor 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 Sep 2, 2:43 AM CST, 3 hours 22 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LA CROSSE WI 343 AM CDT THU SEP 2 2010 .SHORT TERM...TODAY THROUGH SATURDAY AT 3 AM...A LONG WAVE TROUGH WAS LOCATED ACROSS THE NORTH PLAINS. AHEAD OF IT...SHOWERS AND THUNDERSTORMS WERE DEVELOPING ACROSS MINNESOTA...WESTERN IOWA...AND NORTHEAST NEBRASKA. THERE WAS SOME REPORTS OF SEVERE WEATHER EARLIER IN THE NIGHT ACROSS SOUTHWEST MINNESOTA AND ACROSS THE OMAHA COUNTY WARNING AREA. HOWEVER AS THESE THUNDERSTORMS HAVE MOVED OUT OF THE BETTER INSTABILITY AND MOISTURE TRANSPORT...THE REPORTS HAVE WANED. THE 02.00Z MODELS REMAIN IN VERY GOOD AGREEMENT THAT THIS LONG WAVE TROUGH WILL MOVE EAST INTO THE AREA LATE THIS AFTERNOON AND REMAIN ACROSS THE AREA INTO FRIDAY. THE MODELS ARE IN DISAGREEMENT ON HOW MUCH INSTABILITY WILL BE LOCATED ACROSS THE AREA. THE NAM/WRF HAS THE MIXED LAYER CAPES GENERALLY LESS THAN 700 J/KG THROUGH THE DAY. MEANWHILE THE GFS HAS THE IN THE 1000 TO 1500 J/KG THROUGH THIS MORNING...AND THEY FALL OFF TO LESS THAN A 1000 J/KG THIS AFTERNOON AS THE COLD FRONT MOVES THROUGH THE AREA. AT THIS TIME...THE GFS IS VERIFYING THE BEST...SO LEANING MORE TOWARD IT. WITH THE BEST SHEAR BEING LOCATED IN THE 0-3 KM RANGE... THERE IS A POSSIBILITY THAT WE COULD A SEE A FEW OF THESE THUNDERSTORMS BECOME SEVERE WITH THE MAIN THREAT BEING DAMAGING WIND GUSTS THROUGH EARLY AFTERNOON. ON FRIDAY...THE MODELS CONTINUE TO SHOW THAT THERE WILL BE A TIGHT SURFACE GRADIENT LOCATED ACROSS THE AREA. THIS WILL RESULT IN SUSTAINED WINDS IN THE 15 TO 30 MPH RANGE. WITH THE BUFKIT SOUNDINGS CONTINUING TO SUGGEST THAT WE WILL MIX UP INTO THE 750 TO 800 MB RANGE...SOME OF THE STRONGER WINDS FROM ALOFT WILL BE ABLE TO MIX TO SURFACE AND AS A RESULT...WE SHOULD SEE WIND GUSTS IN THE 30 TO 40 MPH RANGE. THESE WINDS SHOULD GRADUALLY DIMINISH IN THE LATE AFTERNOON AND EARLY EVENING AS THE SURFACE PRESSURE GRADIENT RELAXES SOME AND THE DIURNAL MIXING LOWERS. IN ADDITION TO THE WINDS...THERE WILL ALSO BE SOME SCATTERED INSTABILITY SHOWERS DUE TO THE COLD AIR ALOFT. .LONG TERM...SATURDAY NIGHT THROUGH WEDNESDAY LIKE THEIR PREDECESSORS...THE 02.00Z MODELS CONTINUE TO SHOW THAT A WARM FRONT WILL BE MOVING NORTHWARD ACROSS THE AREA ON SUNDAY NIGHT AND LABOR DAY. HOWEVER THEY ARE DIFFERING ON HOW MUCH PRECIPITATION WILL BE ASSOCIATED WITH IT. THE GFS SHOWS THAT THERE WILL BE ENOUGH MOISTURE TRANSPORT INTO THE FRONT TO GENERATE SOME PRECIPITATION DESPITE THE VERY WARM AIR ALOFT /10 TO 12C 700 MB TEMPERATURES/. MEANWHILE THE ECMWF SHOWS THAT THE AIR COMING OUT OF THE SOUTHERN PLAINS WILL BE TOO DRY TO GENERATE ANY PRECIPITATION. ONE CHANGE IN THE MODELS THIS MORNING WAS THAT THE COLD FRONT IS NOW MOVING THROUGH THE REGION ON MONDAY NIGHT INSTEAD OF TUESDAY. EVEN THOUGH THERE IS AGREEMENT IN THE FRONTAL TIMING...THE MODELS DO DISAGREE ON WHETHER THERE WILL BE ANY PRECIPITATION ASSOCIATED WITH IT. THE GFS HAS ITS FORCING A BIT FURTHER SOUTHEAST THAN THE ECMWF. AS A RESULT...IT IS ABLE TO HELP ERODE THE STRONG CAP ACROSS THE REGION. MEANWHILE THE ECMWF SHOWS THAT THE CAP WILL REMAIN IN PLACE AND THE FRONT MOVES THROUGH THE FORECAST AREA WITH LITTLE...IF ANY...PRECIPITATION. BEYOND THIS TIME PERIOD...THERE REMAINS LITTLE RUN TO RUN CONSISTENCY ON WHERE A MEANDERING FRONT WILL BE LOCATED AND THIS ULTIMATELY AFFECTS THE PRECIPITATION TIMING AND TEMPERATURES. && .AVIATION...TODAY INTO FRIDAY MAIN INITIAL FOCUS FOR THIS MORNING ARE ON THE VLIFR FOG AND STRATUS THAT HAS FORMED OVER MUCH OF SOUTHERN WISCONSIN AND THE TIMING OF SHOWERS AND THUNDERSTORMS MAKING IT INTO THE TAF SITES. FIRST...DENSE FOG AND VLIFR CEILINGS HAVE FORMED OVER MUCH OF SOUTHERN WISCONSIN NORTH OF A STALLED OUT FRONT. THESE CONDITIONS ARE EXPECTED TO PERSIST INTO THE MID MORNING HOURS AND POSSIBLY LIFT NORTH AS THE NEXT STORM SYSTEM TRACKS INTO THE REGION AND PULLS THE FRONT NORTHWARDS. UPPER LEVEL CLOUD COVERAGE MAY LIMIT HOW LOW CONDITIONS GET AT LSE ALONG WITH STRONGER WINDS ALOFT. THE FIRST WAVE OF SHOWERS AND THUNDERSTORMS WILL MOVE INTO THE REGION FROM CENTRAL MINNESOTA THIS MORNING. ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS THE REGION LATER THIS MORNING AND PERSIST INTO THE EARLY AFTERNOON HOURS BEFORE A COLD FRONT SWEEPS THROUGH. MVFR TO IFR CONDITIONS WILL BE POSSIBLE AT TIMES WITH THESE STORMS. AS THIS STORM SYSTEM MOVES THROUGH THE REGION AND THE COLD FRONT MIGRATES THROUGH...WINDS WILL SHIFT AROUND TO THE WEST AND BECOME RATHER GUSTY...PARTICULARLY ON FRIDAY WHEN SOME GUSTS ARE EXPECTED TO BE IN THE 30 TO 40 KNOT RANGE. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...NONE. MN...NONE. IA...NONE. && SHORT/LONG TERM...BOYNE AVIATION...HALBACH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LA CROSSE WI 436 AM CDT THU SEP 2 2010 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-032>034- 041>044-053>055-061-031100- 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- 436 AM CDT THU SEP 2 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF SOUTHEAST MINNESOTA...NORTHEAST IOWA...AND WEST CENTRAL AND NORTH CENTRAL WISCONSIN. .DAY ONE...TODAY AND TONIGHT OCCASIONAL THUNDERSTORMS ARE EXPECTED TODAY...PARTICULARLY THIS MORNING. THE THREAT OF STORMS WILL SHIFT TO THE EAST TO WESTERN WISCONSIN THIS AFTERNOON BEFORE CLEARING OUT BY THIS EVENING. HEAVY DOWNPOURS...FREQUENT LIGHTNING AND STRONG WIND GUSTS WILL BE THE MAIN THREATS THROUGH THE DAY. THE OVERALL THREAT FOR ANY OF THESE STORMS BECOMING SEVERE IS RATHER LOW GIVEN THAT INSTABILITY IS NOT EXPECTED TO BE VERY HIGH TODAY AND THAT THE COLD FRONT WILL ALREADY BE NEAR THE MISSISSIPPI RIVER BY NOON. THUS...IF ANY STORMS DO GO SEVERE...THE BEST CHANCES WOULD BE ACROSS WESTERN WISCONSIN IN THE AFTERNOON. THIS THREAT WILL END ONCE THE COLD FRONT COMES THROUGH AND SHIFTS AROUND TO THE WEST. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY STRONG SUSTAINED WINDS ARE EXPECTED ON FRIDAY WITH SOME GUSTS REACHING UP TO 40 MPH. THERE IS A CHANCE FOR THUNDERSTORMS FROM LABOR DAY THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED FOR TODAY OR TONIGHT. IF IT IS NEEDED...THE BEST CHANCES WOULD BE IN WESTERN WISCONSIN THIS AFTERNOON. .EMERGENCY MANAGEMENT COORDINATION... NO CALL IS SCHEDULED. HALBACH
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 443 AM CDT THU SEP 2 2010 MNZ079-086>088-WIZ032-033-021045- BUFFALO-DODGE-OLMSTED-TREMPEALEAU-WABASHA-WINONA- 443 AM CDT THU SEP 2 2010 AT 439 AM...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS FROM 10 MILES NORTH OF MAXVILLE TO BLOOMING PRAIRIE...MOVING EAST AT 40 MPH. WIND GUSTS OF 40 TO 50 MPH AND HEAVY RAIN MAY ACCOMPANY THESE STRONG THUNDERSTORMS. THE STRONG THUNDERSTORMS WILL BE NEAR... MANTORVILLE...LAKE CITY...ORONOCO...KASSON AROUND 450 AM... HAYFIELD...BYRON...HIGHWAY 52 AND COUNTY 14 AROUND 500 AM... WABASHA...ROCHESTER AROUND 510 AM... HEAVY RAIN COULD LEAD TO MINOR FLOODING OR A SHORT PERIOD OF STANDING WATER. STAY CLEAR OF DRAINAGE AREAS AND AVOID AREAS OF HIGH WATER IF THEY DEVELOP. THESE WIND GUSTS COULD BLOW AROUND OUTDOOR FURNITURE AND OTHER LIGHT OBJECTS. SMALL BRANCHES MAY ALSO FALL. SEEK SAFE SHELTER INSIDE A BUILDING. HALBACH
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 543 AM CDT THU SEP 2 2010 WIZ017-029-032>034-021145- BUFFALO-CLARK-JACKSON-TAYLOR-TREMPEALEAU- 543 AM CDT THU SEP 2 2010 AT 538 AM...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS FROM 15 MILES WEST OF DONALD TO WICKHAM VALLEY...MOVING EAST AT 35 MPH. WIND GUSTS OF 40 TO 50 MPH AND HEAVY RAIN MAY ACCOMPANY THESE STRONG THUNDERSTORMS. THE STRONG THUNDERSTORMS WILL BE NEAR... INDEPENDENCE AROUND 550 AM... WHITEHALL...OSSEO...BLAIR AROUND 600 AM... PRICE...BLAIR...6 MILES SOUTH OF JUMP RIVER AROUND 610 AM... THORP AROUND 620 AM... HUMBIRD AROUND 630 AM... THESE WIND GUSTS COULD BLOW AROUND OUTDOOR FURNITURE AND OTHER LIGHT OBJECTS. SMALL BRANCHES MAY ALSO FALL. SEEK SAFE SHELTER INSIDE A BUILDING. HALBACH
The La Crosse radar (KARX), 163 km away, was scanning. The volume nearest the first event began at 12:06 UTC.
1 thunderstorm wind. Local standard time, as filed.
Several trees were knocked down. Other trees were blown down as well across eastern parts of the county.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2010Every state in 2010This day in weather historyWarnings in Wisconsin, September 2010
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: 255047.