Thunderstorms developed across the area during the early afternoon of May 25th. Some of these thunderstorms produced some hail that was less than an inch in diameter.
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.
Thunderstorms developed across the area during the early afternoon of May 25th. Some of these thunderstorms produced some hail that was less than an inch in diameter.
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 May 25, 11:11 AM CST, 1 hour 29 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LA CROSSE WI 1211 PM CDT TUE MAY 25 2010 .UPDATE...THIS AFTERNOON CLOSELY WATCHING TWO CONCENTRATED AREAS OF CONVECTION. THE FIRST IS LOCATED ACROSS SOUTHERN CLARK COUNTY AND EASTERN JACKSON COUNTY. THERE IS 3 TO 4K J/KG SURFACE BASED CAPE AHEAD OF THIS SYSTEM ACROSS NORTH CENTRAL WISCONSIN. IN ADDITION THE 25.14Z HRRR SHOWS THAT THIS SYSTEM WILL CONTINUE NORTHWARD THROUGH THIS AREA THROUGH MID AFTERNOON. DUE TO THIS THE PRECIPITATION CHANCES WERE RAISED TO 100 PERCENT. RESIDENT SHOULD BE PREPARED FOR FREQUENT LIGHTNING AND 1 TO 2 INCH HOURLY RAINFALL RATES WITH THIS SYSTEM. THE SECOND AREA OF CONVECTION WAS LOCATED ACROSS PARTS OF NORTHEAST IOWA. THE LATEST 25.14Z HRRR SUGGESTS THAT THIS CONVECTION WILL SPREAD ACROSS THE REMAINDER OF THE FORECAST AREA THIS AFTERNOON. AS A RESULT...THE LIKELY PRECIPITATION CHANCES WERE SPREAD FURTHER EAST INTO CENTRAL AND SOUTHWEST WISCONSIN. THESE THUNDERSTORMS HAVE BEEN HIGHLY PROLIFIC RAINFALL PRODUCERS THIS MORNING...AND SINCE THIS WILL LIKELY CONTINUE THIS AFTERNOON... HEAVY RAIN WORDING WAS ADDED TO THE FORECAST. && .PREV DISCUSSION... /ISSUED 918 AM CDT TUE MAY 25 2010/ UPDATE...THIS MORNING SHOWERS AND THUNDERSTORMS ARE CONTINUING TO DEVELOP IN AN AREA OF 925 MB AND 850 MB MOISTURE CONVERGENCE ACROSS WESTERN WISCONSIN AND EASTERN IOWA. THE 25.12Z RUC SHOWS THAT THIS CONVERGENCE WILL GRADUALLY WEAKEN THIS MORNING. AS THIS OCCURS...THE THUNDERSTORM ACTIVITY SHOULD SLOWLY DECREASE IN COVERAGE. THE FORECAST WAS UPDATED TO INCREASE THE RAIN CHANCES FROM NORTHEAST IOWA...NORTHEAST INTO CENTRAL WISCONSIN. PREV DISCUSSION... /ISSUED 317 AM CDT TUE MAY 25 2010/ SHORT TERM...TODAY THROUGH THURSDAY NIGHT RATHER DIFFICULT FORECAST REGIME THROUGH WEDNESDAY...WITH MAIN CONCERN ON PRECIPITATION CHANCES THROUGH WEDNESDAY NIGHT AND ITS AFFECT ON TEMPERATURES. 08Z WATER VAPOR IMAGERY IS SHOWING A WELL DEFINED UPPER CIRCULATION OVER EASTERN MONTANA AND ANOTHER WEAK SHORTWAVE ROTATING THROUGH ILLINOIS. SURFACE BOUNDARY ASSOCIATED WITH THE MONTANA WAVE WAS SPAWNING A LINE OF CONVECTION ALONG THE MINNESOTA/DAKOTAS BORDER AND ALONG THE IOWA NEBRASKA BORDER. WELL DEFINED OUTFLOW BOUNDARY SEEN RACING OUT AHEAD OF THIS LINE. MEANWHILE SHORTWAVE OVER ILLINOIS SPAWNING A SMALL CLUSTER OF STORMS HEADING INTO NORTHWEST ILLINOIS. OTHERWISE INFRARED SATELLITE IMAGERY SHOWING CLEAR SKIES ACROSS THE FORECAST AREA...WITH HIGHER CLOUDS SPREADING IN FROM THE WEST AND SOUTH. ONLY DIFFERENCE BETWEEN THE 25.00Z NCEP DETERMINISTIC MODELS IS IN HOW QUICKLY THE HIGH BUILDS INTO THE REGION WEDNESDAY NIGHT. NAM SLOWEST AND ACTUALLY CONTINUES SOME INSTABILITY INTO THURSDAY ACROSS THE FAR SOUTH...WHILE GFS PUSHES BOUNDARY WELL SOUTH OF THE AREA. GFS HAS BEEN THE MOST CONSISTENT WITH THE MOVEMENT OF THE SYSTEM. BIGGEST QUESTION IN THE NEAR TERM IS CONVECTIVE POTENTIAL TODAY. UPPER LOW LIFTS FROM MONTANA THIS MORNING INTO MANITOBA LATER TODAY. FRONTAL BOUNDARY PUSHES EAST...BUT MODELS NEVER TAKE IT BEYOND THE INTERSTATE 35 CORRIDOR. HOWEVER...SEVERAL OUTFLOW BOUNDARIES...ONE FROM THE CONVECTION OVER WESTERN IOWA AND MINNESOTA AND THE OTHER FROM THE CONVECTION IN ILLINOIS LIKELY TO PLAY A ROLE TODAY. WITH LITTLE IN THE WAY OF MIXED LAYER CIN EXPECTED TODAY WILL LIKELY SEE CONVECTION BEGIN TO FIRE OVER THE AREA FROM MID MORNING ON. MODELS CONSISTENT IN THIS DEVELOPMENT AROUND 15Z. THUS HAVE KEPT THE LIKELY PROBABILITIES GOING...ESPECIALLY NEARER THE SURFACE FRONT ACROSS THE WEST. ORGANIZED SEVERE NOT EXPECTED AS DEEP SHEAR IS 20 KNOTS OR LESS...BUT GIVEN INSTABILITIES CANNOT RULE OUT AN ISOLATED SEVERE HAIL OR WIND REPORT. WITH THE EXPECTED CLOUDS AND CONVECTION...TEMPERATURES TO BE PROBLEMATIC.WITH A VERY WARM START TO THE DAY STILL EXPECT READINGS TO REACH THE UPPER 80S IN MANY AREAS. AS INSTABILITY WANES THIS EVENING AND LACK OF ANY MOISTURE TRANSPORT MAY SEE CONVECTION WIND DOWN BY LATE EVENING...BUT WITH ANY RESIDUAL BOUNDARIES AND THE VERY MOIST LOW LEVELS WILL NOT ADD ANY TIMING TO THIS TIME FRAME. SURFACE BOUNDARY FINALLY MAKES ITS WAY THROUGH THE AREA WEDNESDAY. WITH MOIST AIRMASS STILL IN PLACE (SURFACE DEW POINTS IN THE MID TO UPPER 60S) AND LITTLE IF ANY CIN...EXPECT CONVECTION TO ONCE AGAIN INCREASE IN COVERAGE. FOR THIS REASON DID RAISE PROBABILITIES INTO THE LIKELY CATEGORY. WITH LIGHTER LOW LEVEL WINDS PER SOUNDINGS AND PRECIPITABLE WATER VALUES RUNNING NEARLY 200 PERCENT OF NORMAL COULD SEE SOME SLOWER MOVING CELLS WITH THE POTENTIAL FOR LOCALLY HEAVY DOWNPOURS. CONVECTION WILL BE ON THE WANE WEDNESDAY NIGHT AS DRIER AIR BEGINS TO FILTER INTO THE AREA. HIGHEST PROBABILITIES WILL BE DURING THE EVENING HOURS ACROSS THE SOUTHERN ZONES. HIGH PRESSURE THEN BUILDS IN FROM THE NORTH THURSDAY AND THURSDAY NIGHT. COOLER TEMPERATURES ALBEIT STILL ABOVE NORMAL AND MORE COMFORTABLE HUMIDITIES WILL BE FELT. WITH THE CLEAR SKIES THURSDAY NIGHT AND LIGHT WINDS AND RECENT RAINFALL COULD SEE THE POTENTIAL FOR SOME AREAS OF FOG...ESPECIALLY IN THE VALLEY LOCATIONS. STILL A FEW DAYS OUT AND THUS WILL NOT INCLUDE IN THE DATABASE AS OF YET. LONG TERM...FRIDAY THROUGH MONDAY BOTH THE 25.0Z GFS AND ECMWF IN GOOD AGREEMENT AT THE BEGINNING OF THE PERIOD IN KEEPING UPPER RIDGE AND SURFACE HIGH PRESSURE OVER THE AREA. DIFFERENCES DO BEGIN TO COME INTO PLAY LATER IN THE WEEKEND AND EARLY NEXT WEEK. UPPER LOW PUSHES OUT OF THE NORTHERN ROCKIES INTO SOUTHERN CANADA PUSHING A SURFACE BOUNDARY TOWARD THE AREA. GFS FASTEST WITH THIS INITIATING CONVECTION ALONG IT ON SUNDAY ACROSS THE FORECAST AREA...WHILE ECMWF SLOWER WITH THE FRONT PLACING IT OVER WESTERN MINNESOTA. WITH THESE CONTINUED DIFFERENCES THE LOWER END PROBABILITIES FOR SUNDAY INTO MONDAY LOOK REASONABLE. THUS NO CHANGES WERE MADE TO THIS TIME FRAME. AVIATION...TODAY AND TONIGHT A LOWER CONFIDENCE FORECAST FOR TODAY/TONIGHT...AS FAR AS CONVECTION CHANCES/TRENDS AND MVFR/IFR OCCURRENCE AT THE TAF SITES. THE AIRMASS OVER THE AREA REMAINS UNSTABLE FOR TODAY/TONIGHT...WITH A WEAKENING INVERSION/CAP ALOFT. MODEL SOUNDINGS INDICATE THIS TO BE MINIMAL OVER THE AREA BY MID MORNING. FORCING MECHANISMS TO FOCUS CONVECTION REMAIN ON THE WEAK SIDE. HOWEVER WITH THE WEAKENING CAP...ANY WEAKER FEATURES LIKELY TO BE ENOUGH TO INITIATE SCT SHRA/TSRA OVER THE AREA TODAY. ONE OF THESE IS A WEAKENING BOUNDARY PUSHING IN FROM THE WEST. ANOTHER IS A WEAK SHORTWAVE OR TWO ROTATING AROUND THE WEST SIDE OF THE UPPER LEVEL HIGH CENTERED OVER EASTERN ONT. MODEL CONSENSUS HAS THESE WEAK FEATURES PROVIDING ENOUGH CONVERGENCE/LIFT FOR SCT -SHRA/TSRA OVER THE AREA BY LATE MORNING. HOWEVER...MODEL CONSENSUS WEAK WITH ACTUAL TIMING/LOCATION OF SHRA/TSRA IN/AROUND THE AREA. WILL LEAVE TAFS WITH VCSH AND CB MENTION UNTIL A CLEARER TIMING TREND FOR TSRA CAN BE DETERMINED. SOME CONSENSUS FOR A LULL IN THE CONVECTION TONIGHT AS INSTABILITY DECREASES...WITH AN INCREASE OF SHRA/TSRA ON WED AS INSTABILITY BUILDS AHEAD OF THE MAIN COLD FRONT PUSHING THRU THE AREA. GENERAL VFR CONDITIONS EXPECTED TO PREVAIL THRU TODAY/TONIGHT...EXCEPT MVFR/LCL IFR CIGS/VSBYS IN THE SCT SHRA/TSRA. A BETTER SIGNAL FOR A PERIOD OF MVFR CIGS/VSBYS WITH THE FRONTAL PASSAGE ON WED. CLIMATE...TODAY AND TONIGHT AFTER A RECORD BREAKING DAY MONDAY...MORE RECORDS COULD BE BROKEN AGAIN TODAY. THE CAVEAT TO RECORDS HIGHS TODAY WILL BE THE AMOUNT OF CLOUDS AND PRECIPITATION. BUT WITH A WARM START TO THE DAY IT WILL NOT TAKE MUCH OF A RISE TO GET NEAR THE RECORD LEVELS. THE TABLE BELOW PROVIDES SOME OF THE RECORDS FOR THIS TIME PERIOD... ROCHESTER MN... TUESDAY MAY 25 MAXIMUM TEMPERATURE...89 IN 1980 TUESDAY MAY 25 WARMEST MINIMUM TEMPERATURE...64 IN 1944 LA CROSSE WI... TUESDAY MAY 25 MAXIMUM TEMPERATURE...91 IN 1980 TUESDAY MAY 25 WARMEST MINIMUM TEMPERATURE...71 IN 1914 && .ARX WATCHES/WARNINGS/ADVISORIES... WI...NONE. MN...NONE. IA...NONE. && UPDATE...BOYNE SHORT/LONG TERM...RABERDING AVIATION...RRS CLIMATE...BOYNE/RABERDING
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LA CROSSE WI 1244 PM CDT TUE MAY 25 2010 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029- 032>034-041>044-053>055-061-261100- 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- 1244 PM CDT TUE MAY 25 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST MINNESOTA...NORTHEAST IOWA...AND SOUTHWEST INTO CENTRAL WISCONSIN. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED ACROSS THE AREA THIS AFTERNOON AND TONIGHT AS A WEAKENING COLD FRONT PUSHES INTO THE MOIST AND UNSTABLE AIRMASS OVER THE AREA. THESE THUNDERSTORMS WILL BE CAPABLE OF PRODUCING FREQUENT LIGHTNING...AND VERY HEAVY RAIN WHICH MAY RESULT IN SOME LOCALIZED FLOODING. IN ADDITION...A FEW THUNDERSTORMS MAY PRODUCE PENNY SIZE HAIL AND WIND GUSTS UP TO 60 MPH THIS AFTERNOON AND EVENING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY SCATTERED THUNDERSTORMS ARE AGAIN EXPECTED ON WEDNESDAY AS THE COLD FRONT PUSHES SOUTH ACROSS THE AREA. WITH WEAK WINDS ALOFT ON WEDNESDAY...THE THREAT OF ORGANIZED SEVERE THUNDERSTORMS APPEARS MINIMAL. A FEW OF THE STORMS MAY STILL BE CAPABLE OF PRODUCING GUSTY WINDS TO 45 MPH AND SMALL HAIL. .SPOTTER INFORMATION STATEMENT... WHILE WIDESPREAD SPOTTER ACTIVATION IS NOT ANTICIPATED...WE WOULD GREATLY APPRECIATE ANY REPORTS OF HAIL...WIND GUSTS...AND RAINFALL AMOUNTS. .EMERGENCY MANAGEMENT COORDINATION... NO CALL IS SCHEDULED. BOYNE
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
1248 PM CDT TUE MAY 25 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1248 PM TSTM WND DMG 2 S MEDFORD 45.11N 90.35W
05/25/2010 TAYLOR WI LAW ENFORCEMENT
TREES DOWN SOUTH OF TOWN
&&
SHEAPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
108 PM CDT TUE MAY 25 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1244 PM TSTM WND DMG 4 SW MEDFORD 45.10N 90.41W
05/25/2010 TAYLOR WI LAW ENFORCEMENT
SEVERAL TREES DOWN
&&
SHEAPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
128 PM CDT TUE MAY 25 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1230 PM FLASH FLOOD CLAYTON CENTER 42.88N 91.32W
05/25/2010 CLAYTON IA LAW ENFORCEMENT
WATER OVER SOME ROADS ALONG AND NEAR HIGHWAY 128 BUT HAS
RECEDED
&&
SHEAPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
132 PM CDT TUE MAY 25 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0109 PM HAIL LUBLIN 45.08N 90.72W
05/25/2010 E0.25 INCH TAYLOR WI TRAINED SPOTTER
ALSO HAD 0.75 INCHES OF RAIN
&&
SHEAPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
137 PM CDT TUE MAY 25 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1246 PM TSTM WND DMG 10 NW MEDFORD 45.24N 90.49W
05/25/2010 TAYLOR WI LAW ENFORCEMENT
TREES DOWN ALONG COUNTY ROAD M WEST OF HIGHWAY 13.
RELAYED VIA AMATEUR RADIO.
&&
SHEASPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 138 PM CDT TUE MAY 25 2010 MNZ079-251930- WABASHA- 138 PM CDT TUE MAY 25 2010 ...RAPIDLY DEVELOPING THUNDERSTORM OVER WABASHA COUNTY... AT 133 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A RAPIDLY DEVELOPING THUNDERSTORM OVER CENTRAL WABASHA COUNTY... BETWEEN MILLVILLE AND CONCEPTION. THIS STORM WAS NEARLY STATIONARY. NICKEL SIZE HAIL...WINDS GREATER THAN 40 MPH...FREQUENT CLOUD TO GROUND LIGHTNING AND HEAVY DOWNPOURS ARE POSSIBLE WITH THIS STORM. * SOME LOCATIONS THAT MAY BE IMPACTED BY THIS STORM INCLUDE... THEILMAN AND THE ZUMBRO BOTTOMS CAMPGROUND. GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. AJ
The La Crosse radar (KARX), 96 km away, was scanning. The volume nearest the first event began at 18:37 UTC.
3 hail. Local standard time, as filed.
Winds from the thunderstorms were estimated to be between 40 and 50 mph and were strong enough to move around some patio furniture.
Dime sized hail was reported along County Road 9.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2010Every state in 2010This day in weather historyWarnings in Minnesota, May 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: 223448, 223450, 223451.