Thunderstorms developed along a warm front that lifted north across central Wisconsin. The storms produced isolated wind damage and heavy rainfall.
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 GRB wrote it up.
Thunderstorms developed along a warm front that lifted north across central Wisconsin. The storms produced isolated wind damage and heavy rainfall.
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 Green Bay, WI wrote its last area forecast discussion before the first event at Aug 13, 4:41 AM CST, 2 hours 14 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE GREEN BAY WI 541 AM CDT FRI AUG 13 2010 .UPDATE...SCENARIO 2 DESCRIBED BELOW IS PLAYING OUT. JUST UPDATED PRODUCTS FOR SEVERE THUNDERSTORMS WATCH FOR MOST OF THE SW PART OF THE FCST AREA. SINCE STORMS WILL BE ARRIVING EARLIER...UPDATED FLASH FLOOD WATCH TO START IMMEDIATELY OVER E-C WI. EVEN IF CURRENT LINE ISN/T SVR BY THE TIME IT REACHES THE FAR E...IT COULD DROP SOME HEAVY RAINS. SKOWRONSKI && .PREV DISCUSSION...ISSUED AT 327 AM CDT FRI AUG 13 2010... SYNOPSIS...HUMID WITH THUNDERSTORMS...POSSIBLY PRODUCING STRONG WINDS AND FLOODING RAINFALL EARLY...THEN MUCH LESS HUMID WITH SEASONABLE TEMPERATURES. ENERGY FM OLD WEST COAST TROF HEADING TOWARD THE AREA...AND COMBINED WITH ADDITIONAL ENERGY SWINGING ARND RIDGE OVER THE GULF OF AK...IT WL ESTABLISH BROAD STG LNGWV TROF OVER S-C CANADA AND THE N-C CONUS. ONCE IN PLACE...TROF WL DOMINATE THE WX FOR THE REMAINDER OF THE FCST PERIOD...THOUGH THERE ARE SIGNS FLOW COULD GO BACK TO ZONAL AGAIN AFTER THE END OF THE FCST PERIOD. EXPECT WIDESPREAD HEAVY...AND POSSIBLY EXCESSIVE...RAINFALL EARLY AS VERY WARM AND HUMID AIR GETS DISPLACED OFF TO THE SE. PCPN CHCS AFTER THAT WL DEPEND ON SHRTWVS ROTG THROUGH THE BASE OF THE UPR TROF...SO AMNTS WOULD BE LIGHTER AND COVERAGE MORE SCT. TEMPS AND HUMIDITIES WL START OUT WAY ABV NORMAL...THEN TEMPS WL FALL BACK TO NR NORMAL AS MUCH DRIER AIR CANADIAN AIR SETTLES INTO THE RGN. SHORT TERM...TDA/TNGT/SAT. FOCUS OF FCST OBVIOUSLY ON FLOODING AND SVR WX POTENTIAL. GENERAL SCENARIO DEPICTED ON THE MODELS WAS FOR CONVECTION W OF THE AREA TO WEAKEN AND SHIFT ACRS THE N THIS MORNING. THAT WOULD LEAVE THE SRN/SERN PART OF THE FCST AREA GENERALLY UNTOUCHED...WITH SIG DESTABILIZATION BY AFTN. THEN APPROACH OF ENERGY FM OLD WEST COAST TROF WOULD HELP INITIATE NEW STORMS...WHICH WOULD EVOLVE INTO DAMAGING WIND PRODUCING MCS AS THEY SURGE E OR ESE ACRS THE FCST AREA THIS AFTN/EVENING. THE PROBLEM WITH THAT SCENARIO IS THAT STORMS IN SRN MN ARE CURRENTLY STRENGTHENING AND HEADING MORE ELY. THAT WOULD SEEM TO SUGGEST A DIFFERENT SCENARIO. WITH WK/DIFFUSE BOUNDARY STRETCHED OUT ACRS THE FCST AREA...THE MN STORMS COULD JUST ROLL EWD. THEY WOULD ARRIVE EARLIER...BUT STILL COULD BE SVR. AFTER THEY EXIT...IT/S TOTALLY UNCLEAR HOW MUCH RECOVERY WOULD OCCUR. SHOULD STILL GET MORE STORMS THIS AFTN/TNGT AS FORCING WL BE STG WITH MAIN SHRTWV CROSSING THE AREA...BUT SVR RISK MUCH MORE QUESTIONABLE. ATM SEEMS TO BE RUNNING FASTER THAN THE MODELS...SO ATTM I/M LEANING TOWARD THE SECOND SCENARIO...BUT AM PREPARED TO MAKE ISSUANCE TIME ADJUSTMENTS BASED ON RADAR/STLT. IN EITHER CASE...EXCESSIVE RAINFALL IS POSSIBLE. AND GIVEN RECENT RAINFALLS AND SATURATED SOILS...WL POST A FLASH FLOOD WATCH FOR ALL BUT THE FAR NE. PLAN TO START IT RIGHT AWAY THIS MORNING IN THE W...BUT HOLD OFF ON THE SERN PART OF THE FCST AREA UNTIL AFTN. WITH THE WAY THINGS ARE RUNNING FAST...THINK THE SIG RAINS ARE LIKELY TO BE EAST OF THE AREA BY LATE TNGT. BUT JUST TO KEEP THINGS SIMPLE...AND SINCE THERE IS SOME DOUBT ABOUT THAT...JUST WENT WITH 12 HR POP GRID FOR TNGT. MAIN FRONT WL STILL BE W OF THE AREA SAT...SO HUMIDITIES WL STILL BE HIGH. BUT CONVERGENCE ALONG THE FRONT WL BE LIMITED...AND ATM SHOULD BE TOTALLY WORKED OVER. WL CARRY CHC OF LINGERING SHRA IN THE MORNING...THEN JUST A CHC OF TSRA IN THE AFTN IN CASE SOMETHING POPS ALONG THE FRONT. VERY WARM TEMPS EXPECTED AGAIN...ESP OVER E-C WI. WLY WINDS SHOULD BRING TEMPS NR 90 RIGHT UP TO THE LAKESHORE. LONG TERM...SATURDAY NIGHT THRU NEXT THURSDAY. FAIRLY SHARP SHORTWAVE TROUGH MOVES THROUGH SATURDAY NIGHT. RIGHT ENTRANCE REGION OF 60 KNOT JET AT 500MB SHOULD PROVIDE SUFFICIENT VERTICAL MOTION TO PRODUCE AT LEAST SCATTERED SHOWERS FROM AN OTHERWISE DRYING ATMOSPHERE. THEN WE GET THE FIRST SIGNIFICANT PATTERN CHANGE IN MORE THAN A MONTH...WITH CYCLONIC NORTHWEST UPPER FLOW EXPECTED FOR SUNDAY THROUGH EARLY THURSDAY. THIS PATTERN CHANGE ISN/T FORECAST TO LAST TOO LONG...AS MEDIUM RANGE MODELS SHOW A RETURN TO NEARLY ZONAL UPPER FLOW BY NEXT FRIDAY AND CONTINUING INTO THE FOLLOWING WEEK. TEMPERATURES AND DEW POINTS SHOULD FALL TO NORMAL LEVELS FOR MONDAY THROUGH THURSDAY BEFORE CLIMBING BY THE FOLLOWING WEEKEND. SOME JET STREAKS MOVING THROUGH THE CYCLONIC UPPER FLOW SHOULD PRODUCE SCATTERED SHOWERS OR LOW TOP THUNDERSTORMS MONDAY AND AGAIN DURING THE MIDDLE OF THE WEEK. AVIATION...WL NEED TO CARRY AT LEAST 1 PERIOD TO TSRA AT ALL TAF SITES. WL MAKE ISSUANCE TIME DECISION ON TIMING. && .GRB WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR WIZ020-021-031- 037>040-045-048>050-074. FLASH FLOOD WATCH THROUGH THIS EVENING FOR WIZ005-010-018-019- 030-035-036. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 446 AM CDT FRI AUG 13 2010 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-141100- VILAS-ONEIDA-FOREST-FLORENCE-NORTHERN MARINETTE-LINCOLN-LANGLADE- MENOMINEE-NORTHERN OCONTO-DOOR-MARATHON-SHAWANO-WOOD-PORTAGE- WAUPACA-OUTAGAMIE-BROWN-KEWAUNEE-WAUSHARA-WINNEBAGO-CALUMET- MANITOWOC-SOUTHERN MARINETTE-SOUTHERN OCONTO- 446 AM CDT FRI AUG 13 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...TODAY AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE ENTIRE AREA TODAY AND TONIGHT. THE PRIMARY RISKS ARE OF DAMAGING WINDS AND FLOOD PRODUCING HEAVY RAINS. LARGE HAIL IS ALSO POSSIBLE. A CLUSTER OF SEVERE STORMS MOVING OUT OF WEST-CENTRAL WISCONSIN WILL PUSH INTO CENTRAL WISCONSIN THIS MORNING. DAMAGING WINDS AND HEAVY RAINS WILL BE POSSIBLE WITH THESE STORMS. ADDITIONAL STORMS ARE EXPECTED TO DEVELOP DURING THE AFTERNOON AND EVENING. THOSE STORMS COULD ALSO PRODUCE DAMAGING WINDS AND TORRENTIAL RAINS. THE RISK OF DAMAGING WINDS AND HEAVY RAINS WILL DECREASE FROM WEST TO EAST OVERNIGHT. IF SUFFICIENT SUNSHINE CAN WORK THROUGH THE CLOUD COVER LEFT BEHIND BY THE STORMS THIS MORNING...HEAT INDICES COULD APPROACH UNSAFE LEVELS OVER EAST-CENTRAL WISCONSIN THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THUNDERSTORMS ARE POSSIBLE SATURDAY...BUT WIDESPREAD SEVERE WEATHER IS NOT EXPECTED. THE HUMID CONDITIONS WILL ALSO PERSIST INTO SATURDAY...SO PERSONS WITH RESPIRATORY CONDITIONS OR IN POOR HEALTH MAY NEED TO CURTAIL OUTDOOR ACTIVITIES AT TIMES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY THIS MORNING...AND IS LIKELY TO BE NEEDED THIS AFTERNOON AND THIS EVENING. LMZ521-522-541>543-141100- THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN- 446 AM CDT FRI AUG 13 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST LAKE MICHIGAN AND THE WATERS OF GREEN BAY. .DAY ONE...TODAY AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT. THE STORMS COULD GENEATESTRONG WINDS...DANGEROUS SEAS...AND TORRENTIAL RAINS. AREAS OF DENSE FOG WILL REDUCE VISIBILITIES BELOW ONE MILE AT TIMES...AND CREATE A HAZARD FOR BOATERS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THUNDERSTORMS ARE POSSIBLE SATURDAY...BUT WIDESPREAD SEVERE WEATHER IS NOT EXPECTED. THE VERY HUMID AIR WILL STILL BE ACROSS THE AREA...SO FOG AND HAZE AND PERIODS OF GREATLY REDUCED VISIBILITY OVER THE WATER WILL CONTINUE THROUGH SATURDAY. ALWAYS BE SURE TO CHECK THE LATEST FORECAST FOR UPDATED INFORMATION BEFORE HEADING OUT ON THE WATER. JS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 547 AM CDT FRI AUG 13 2010 WIZ030-035-131200- MARATHON-WOOD- 547 AM CDT FRI AUG 13 2010 ...STRONG THUNDERSTORMS HEADED INTO CENTRAL WISCOSNIN... AT 544 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM CLARK COUNTY TO JACKSON COUNTY TO MONROE COUNTY...MOVING NORTHEAST AT 35 MPH. STRONG WINDS...PENNY SIZE HAIL...FREQUENT CLOUD TO GROUND LIGHTNING...AND TORRENTIAL DOWNPOURS...ARE POSSIBLE WITH THESE STORMS. * THUNDERSTORMS WILL BE NEAR... SPENCER BY 645 AM CDT... PITTSVILLE AND MARSHFIELD BY 655 AM CDT... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED. SKOWRONSKI
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 642 AM CDT FRI AUG 13 2010 WIZ030-035-036-045-131230- MARATHON-PORTAGE-WAUSHARA-WOOD- 642 AM CDT FRI AUG 13 2010 ...STRONG STORMS APPROACHING CENTRAL WISCONSIN... AT 630 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LARGE AREA OF STRONG THUNDERSTORMS 25 MILES WEST OF WISCONSIN RAPIDS...MOVING EAST AT 30 MPH. THESE STORMS WILL AFFECT THE COMMUNITIES OF MARSHFIELD...WISCONSIN RAPIDS...STEVENS POINT AND NEKOOSA. WINDS GUSTS UP TO 50 MPH AND VERY HEAVY DOWNPOURS WITH REDUCED VISIBILITIES...ARE POSSIBLE WITH THESE STORMS. PONDING OF WATER ON SOME AREA ROADS ARE ALSO LIKELY...PARTICULARLY ALONG AND SOUTH OF HIGHWAY 10. GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED. EB
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 745 AM CDT FRI AUG 13 2010 WIZ030-031-035>037-045-048-131345- MARATHON-PORTAGE-SHAWANO-WAUPACA-WAUSHARA-WINNEBAGO-WOOD- 745 AM CDT FRI AUG 13 2010 ...STRONG THUNDERSTORMS MOVING THROUGH CENTRAL WISCONSIN... AT 734 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM NEAR ABBOTSFORD...TO JUST WEST OF WISCONSIN RAPIDS...TO NEW LISBON. THE STORMS WERE MOVING EAST AT 40 MPH. THE LINE WILL PRODUCE GUSTY WEST WINDS AND TORRENTIAL RAIN. THE SOUTHERN PART OF THE LINE WAS STRONGER THAN THE NORTHERN PART. WIND GUSTS OF 35 TO 45 MPH ARE EXPECTED AS THE NORTHERN PART OF THE LINE TRACKS OVER MARATHON AND SHAWANO COUNTIES. IF THE SOUTHERN PART OF THE LINE MAINTAINS ITS INTENSITY...IT COULD GENERATE ISOLATED WIND GUSTS TO 60 MPH. THE TORRENTIAL RAINS WILL GENERATE PONDING OF WATER ON ROADWAYS...ESPECIALLY IN URBAN AREAS. * THUNDERSTORMS WILL BE NEAR... MOSINEE BY 810 AM CDT... RIB MOUNTAIN AND WHITING BY 815 AM CDT... WESTON AND PLAINFIELD BY 820 AM CDT... WAUTOMA AND BEVENT BY 835 AM CDT... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED. SKOWRONSKI
The La Crosse radar (KARX), 130 km away, was scanning. The volume nearest the first event began at 12:56 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds snapped and uprooted several trees near Grand Rapids.
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, August 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: 257781.