During the evening hours of July 22 a band of thunderstorms dropped 5 to 6 inches of rain in parts of Buffalo County, Wisconsin producing flash flooding. Street flooding was fairly widespread not only in Mondovi, but also Buffalo City and Cochrane.
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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.
During the evening hours of July 22 a band of thunderstorms dropped 5 to 6 inches of rain in parts of Buffalo County, Wisconsin producing flash flooding. Street flooding was fairly widespread not only in Mondovi, but also Buffalo City and Cochrane. An observer near Mondovi reported 5.20 inches of rain. Lowland flooding was also widespread in the 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 22, 7:29 PM CST, 51 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LA CROSSE WI 829 PM CDT SUN JUL 22 2007 .UPDATE... FOCUS THIS EVENING IS LOCALIZED HEAVY/EXCESSIVE RAINFALL THREAT...WHETHER WE NEED A FLASH FLOOD WATCH...AND HOW THIS BAND OF STORMS FROM DUNN COUNTY TOWARD WINONA WILL BEHAVE. MANY HEAVY RAIN PARAMETERS CONFIRM AN IDEAL SETUP FOR TORRENTIAL RATES TONIGHT FOR ANY BANDS OF STORMS WE CAN GENERATE LIKE WE HAVE CURRENTLY. 23.00Z KMPX SOUNDING SHOWING A CAPPED SOUNDING TO SURFACE BASED PARCELS...BUT WITH AMPLE WARMTH/MOISTURE WITH PWATS TO 1.80 INCHES. KMPX VWP...AS WELL AS MPX SOUNDING SHOWING PERSISTENT 850MB JET OF 25-30KTS...FEEDING INTO WRN WISCONSIN WHERE KARX VWP IS SOUTHWEST /5KT/ AT 850MB SUGGESTING A GREAT DEAL OF CONVERGENCE. STORMS ORIGINALLY SPARKED WITH WEAK MCV FROM LAST NIGHT/S MCS ACROSS NRN MN...AND NOW BEING FED VERY UNSTABLE AIRMASS ABOVE THE STABILIZING BOUNDARY LAYER AS PARCELS HIT THE LFC IN DUNN/EAU CLAIRE COUNTIES IN MSP. 22.21Z RUC SHOWS THIS 25KT H85 LOW LEVEL JET/WEAK MOISTURE TRANSPORT SIGNAL TO REMAIN INTACT THROUGH MUCH OF THE NIGHT...SO OBVIOUS CONCERN IS WHETHER THIS TO EVOLVE INTO A MORE WIDESPREAD FLOOD THREAT RATHER THAN BUFFALO COUNTY AS IT IS NOW. CALLS TO LAW ENFORCEMENT THUS FAR INDICATING LITTLE WATER ISSUES...BUT IT/S THE REGENERATION OFF THE THE NORTH THAT HAS ME CONCERNED. HAVE ALREADY ADDED HEAVY RAINS TO ZONES...AND UPDATED HWO WITH THIS LINE OF THINKING. WILL MONITOR TRENDS...AND CONSIDER A FLOOD WATCH IF THIS CONTINUES TO SHOW THIS HIGH LEVEL OF ORGANIZATION. A FLASH FLOOD WARNING FOR BUFFALO COUNTY MAY BE NEEDED BY 9 OR 930 PM...AND DOWNSTREAM COUNTIES OF WINONA/FILLMORE WILL NEED TO BE WATCHED. FLASH FLOOD GUIDANCE VALUES ARE VERY HIGH SUGGESTING WE CAN TAKE A LOT OF WATER...AND CORFIDI VECTORS/THICKNESS ORIENTATION SUGGESTS DEVELOPING MCS/MESO BETA ELEMENTS MAY DRIFT SLOWLY WEST/SOUTHWEST OVER TIME...WHICH WE WOULD LIKE TO SEE TO MITIGATE FLOODING. BINAU && .PREV DISCUSSION... /ISSUED 245 PM CDT SUN JUL 22 2007/ SHORT TERM...THROUGH TUESDAY NIGHT FOCUS OF THE FORECAST IS ON THE RAIN CHANCES TONIGHT THROUGH MONDAY NIGHT. SURFACE ANALYSIS THIS AFTERNOON SHOWS HIGH PRESSURE CENTERED OVER LOWER MICHIGAN. A STATIONARY FRONT EXTENDED FROM EASTERN NORTH DAKOTA SOUTH INTO OKLAHOMA. LOCAL AND REGIONAL RADARS SHOW A COMPLEX OF SHOWERS AND THUNDERSTORMS OVER NORTHWEST WISCONSIN SLOWLY DROPPING SOUTHEAST. SHORT TERM MODELS IN PRETTY GOOD AGREEMENT THIS CYCLE TAKING THE SHORT WAVE TROUGH OVER NORTHERN MINNESOTA AND DROPPING IT SOUTH SOUTHWEST ACROSS WISCONSIN TONIGHT AND INTO IOWA MONDAY. THIS WAVE IS HELPING FUEL THE ONGOING CONVECTION TO THE NORTH AND EXPECT THIS ACTIVITY TO DROP SOUTH INTO THE AREA THIS EVENING. HAVE RAISED POPS ACROSS THE NORTH INTO THE LIKELY CATEGORY AND WILL MONITOR RADAR TRENDS TO SEE IF CATEGORICAL POPS WILL BE NEEDED. AREAL COVERAGE OF THE SHOWERS AND STORMS ARE EXPECTED TO INCREASE THROUGH THE NIGHT AS THE WAVE SLOWLY APPROACHES AND THE LOW LEVEL MOISTURE TRANSPORT GETS GOING AFTER SUNSET AND INTERSECTS THE WAVE. THE MOISTURE TRANSPORT IS NOT OVERLY STRONG TONIGHT BUT BOTH THE NAM AND GFS INDICATE IT WILL BE RIGHT INTO THE FORECAST AREA. AN AREA OF ELEVATED CAPE WILL REMAIN OVER THE AREA...ESPECIALLY ACROSS THE WEST THROUGH THE NIGHT. THE NAM SHOWS BETWEEN 500 AND 1000 J/KG ABOVE 1 KM. PRECIPITABLE WATERS RISE TO 1.75 INCHES OR HIGHER SO THE CONVECTION SHOULD PUT DOWN SOME DECENT RAINFALL AMOUNTS. 09Z SREF MEANS INDICATE PROBABILITIES OF 50 TO 70 FOR TONIGHT AND ACCORDINGLY HAVE RAISED THE POPS TO LIKELY FOR MOST OF THE AREA AFTER 06Z. THE ACTIVITY IS EXPECTED TO STILL BE ONGOING OR VERY NEAR THE SOUTHWEST PORTIONS OF THE FORECAST AREA MONDAY MORNING. RAISED POPS TO LIKELY FOR LOCATIONS IN AND AROUND KCCY. MOST OF THE ACTIVITY IS THEN EXPECTED TO SHIFT SOUTHWEST OUT OF THE AREA DURING THE AFTERNOON AND SUBSIDENCE BEHIND THE WAVE SHOULD BE ENOUGH TO DRY THINGS OUT. HOWEVER...THE NAM STILL HAS A WEAK SHORT WAVE TROUGH AT 700 MB COMING OVER THE TOP OF THE RIDGE. THIS COULD BE THE WEAK WAVE CURRENTLY LOCATED NEAR LAKE WINNIPEG SO WILL NOT TOTALLY DROP THE POPS FOR THE AFTERNOON...BUT DID LOWERED THEM ACROSS THE ENTIRE FORECAST AREA. STILL EXPECT TO SEE PLENTY OF CLOUD DEBRIS THROUGH MUCH OF THE DAY AND WITH A GOOD CHANCE OF RAIN YET IN THE MORNING...LOWERED TEMPERATURES QUITE A BIT FOR MONDAY. LONG TERM...WEDNESDAY THROUGH SUNDAY MEDIUM RANGE MODELS HAVE COME INTO VERY GOOD AGREEMENT WITH THE HANDLING OF THE CUT OFF LOW OVER THE EASTERN PART OF THE COUNTRY. MODELS NOW ARE INDICATING A MORE AMPLIFIED PATTERN WITH THE THIS LOW THROUGH THE PERIOD KEEPING THE AREA IN A NORTHWEST FLOW PATTERN. THE SHORT WAVE TROUGH AND SURFACE COLD FRONT SHOWING YESTERDAY TO BE COMING ACROSS THE AREA FOR THE UPCOMING WEEKEND NOW LOOKS TO BE FASTER POSSIBLY CROSSING THE AREA AS EARLY AS THURSDAY NIGHT. NOT QUITE READY TO JUMP TO THIS QUICKER SOLUTION YET BUT WILL TREND TOWARD IT AND INDICATE THE FRONT COMING ACROSS FRIDAY. THIS LEADS TO MOVING THE POPS FORWARD IN TIME STARTING THURSDAY NIGHT AND ENDING FRIDAY NIGHT OR SATURDAY. WITH THE MORE AMPLIFIED FLOW...THE HEAT UNDERNEATH THE UPPER LEVEL RIDGE LOOKS TO STAY WEST OF THE FORECAST AREA AND HAVE CONTINUED A DOWNWARD TREND IN THE TEMPERATURES WITH MAINLY 80S AND A FEW 90S. AVIATION...A 500 MB SHORTWAVE TROUGH WAS DROPPING SOUTHEAST ACROSS THE REGION THIS AFTERNOON...CONTINUING TO SPARK AREAS OF SHOWERS/STORMS ACROSS PARTS OF MN/NORTHWEST WI. DEVELOPMENT CONTINUES DESPITE THE DECREASE IN THE LOW LEVEL JET/MOISTURE TRANSPORT. MODELS HAVING A DIFFICULT TIME GRASPING THE PARTICULARS FOR THE PCPN THREAT...BUT THE OVERALL TREND IS TO INCREASE THE AREAL COVERAGE OF SHRA/TS TONIGHT AS THE MOISTURE TRANSPORT AND 850 MB JET INCREASES...AND THIS LOOKS REASONABLE. THE ACTIVITY SHOULD EXIT TO THE SOUTH BY MON MORNING...WITH A FRONT THEN INTRUDING UPON THE REGION. THIS FRONT COULD SPARK MORE SHRA/TS ON MONDAY...ALTHOUGH DEBRIS CLOUDS FROM THE OVERNIGHT PCPN WILL LIMIT THE INSTABILITY INITIALLY. WILL KEEP MENTION OF VCSH/VCTS FOR TONIGHT...AS TIMING CONFIDENCE ISN/T HIGH ENOUGH FOR A PREDOMINANT OR TEMPO WORDING. CONDITIONS LOOK TO STAY MOSTLY VFR...WITH SOME PERIODS OF MVFR POSSIBLE OVERNIGHT. ARX WATCHES/WARNINGS/ADVISORIES... WI...NONE. MN...NONE. IA...NONE. SHORT/LONG TERM...04 && .ARX WATCHES/WARNINGS/ADVISORIES... WI...NONE. MN...NONE. IA...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LA CROSSE WI 758 PM CDT SUN JUL 22 2007 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-032>034- 041>044-053>055-061-231000- 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- 758 PM CDT SUN JUL 22 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF NORTHEAST IOWA... SOUTHEAST MINNESOTA AND SOUTHWEST INTO CENTRAL WISCONSIN. .DAY ONE...TONIGHT BANDS OF SHOWERS AND THUNDERSTORMS WILL CONTINUE TO EXPAND IN COVERAGE THROUGH THE EVENING AND INTO THE OVERNIGHT ACROSS PORTIONS OF THE AREA. THOSE UNDER ONE OF THE NARROW BANDS OF STORMS...MAY BE DEALING WITH LOCALIZED EXCESSIVE RAINFALL AMOUNTS...IN EXCESS OF 3 OR 4 INCHES. THIS HEAVY RAIN THREAT APPEARS TO MAXIMIZED THIS EVENING FROM MONDOVI AND OSSEO SOUTH TOWARD WINONA AND PRESTON. MORE STORMS MAY DEVELOP LATER ON IN THE NIGHT AND POSE SIMILAR HEAVY RAIN THREATS. SEVERE WEATHER DOES NOT APPEAR TO BE A LARGE THREAT OVERNIGHT...THOUGH SOME HALF INCH SIZED HAIL IS POSSIBLE WITH THE VERY STRONGEST OF THE STORMS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THE DISTURBANCE AND FRONT WILL CONTINUE TO MOVE SOUTH ACROSS THE UPPER MIDWEST ON MONDAY...WITH SCATTERED THUNDERSTORMS EXPECTED ACROSS THE AREA. WITH DAYTIME HEATING AND INCREASING INSTABILITY... ALONG WITH FAVORABLE WINDS ALOFT...A FEW SEVERE STORMS ARE POSSIBLE MONDAY AFTERNOON...MAINLY WEST OF THE MISSISSIPPI RIVER WHERE THE AIRMASS IS EXPECTED TO BE MOST UNSTABLE. THE MAIN SEVERE THREAT APPEARS TO BE LARGE HAIL. IF THE STORMS CAN ORGANIZE INTO A LINE... DAMAGING WINDS WOULD ALSO BE A THREAT. HEAT AND HUMIDITY ARE EXPECTED TO INCREASE FOR THE MIDDLE OF THE WEEK...WITH AFTERNOON HEAT INDICES REACHING 95 TO 100 ACROSS PARTS OF THE AREA WEDNESDAY AND THURSDAY. LATE IN THE WEEK...A FRONT DROPPING SOUTHWARD COULD TRIGGER SCATTERED THUNDERSTORMS FRIDAY INTO SATURDAY. AT THIS TIME...IT IS TOO EARLY TO DETERMINE IF THERE WILL BE A SEVERE WEATHER THREAT WITH ANY OF THESE STORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED TODAY OR TONIGHT. SPOTTER ACTIVATION MAY BE NEEDED MONDAY AFTERNOON. .EMERGENCY MANAGEMENT COORDINATION... NO CALL IS SCHEDULED. RRS/THOMPSON/BINAU
The La Crosse radar (KARX), 69 km away, was scanning. The volume nearest the first event began at 02:21 UTC.
2 flash flood. Local standard time, as filed.
Flash flooding was reported, along with street flooding and water ponding in lowlands.
Flash flooding was reported, along with street flooding and water ponding in lowlands.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2007Every state in 2007This day in weather historyWarnings in Wisconsin, July 2007
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: 48250, 48251.