Thunderstorms that developed in a strongly unstable air mass ahead of an approaching cold front produced damaging winds in east central Wisconsin. About 380 Wisconsin Public Service customers lost power due to the storms.
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 that developed in a strongly unstable air mass ahead of an approaching cold front produced damaging winds in east central Wisconsin. About 380 Wisconsin Public Service customers lost power due to the storms.
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 Jun 8, 6:41 PM CST, 19 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE GREEN BAY WI 741 PM CDT WED JUN 8 2011 .UPDATE...WIND SHIFT CONTS SURGING SWWD DOWN THE BAY. PK WIND SO FAR SEEMS TO BE 27 KTS AT KMNM. THIS MAY INCREASE A LITTLE MORE AS THE AIR STARTS TO FUNNEL WHERE THE BAY NARROWS TOWARD THE MOUTH OF THE FOX RIVER. WATCHING OBS CLOSELY TO SEE IF ME MIGHT NEED AN SMW...BUT WITH SC.Y OUT AND EVENT IN NSH/MWS FOR SEVERAL HOURS...DON/T PLAN TO GO WITH SMW UNLESS E ARE CLEARING GOING TO EXCEED 34 KTS. DWPTS HAVE STAYED UP IN SWLY WINDS FM OSH-ATW-GRB-SUE EWD. THIS AREA STILL QUITE UNSTABLE...AND WITH ADDED CONVERGENCE LIKELY AS BOUNDARIES FM THE NW AND N MEET IN THIS AREA...NEED TO KEEP THE WATCH GOING A LITTLE LONGER. LOOKS LIKE MANITOWOC AND KEWAUNEE COUNTIES HAVE THE GREATEST RISK. SKOWRONSKI && .PREV DISCUSSION...ISSUED AT 536 PM CDT WED JUN 8 2011... UPDATE...WAS CONTENT WATCHING FRONT SLIDE EWD ACRS THE FCST AREA...HOPING IT WOULD MAKE IT THROUGH WITHOUT ANYTHING SIG FIRING OFF. BUT ONCE SVR STORMS STARTED TO DEVELOP DOWN S...SPC NEEDED TO COME OUT WITH A WATCH. THAT FORCED A DECISION ON WHETHER OR NOT TO PLACE PART OF OUR AREA IN THE WATCH. WHILE SVR THREAT HERE ISN/T AS GREAT AS DOWN S... WAS CONCERNED WE STILL HAD 70+F DEWPTS FM ATW/GRB E TO THE LAKESHORE...AND LOW-LEVEL WINDS BACKED JUST SWLY ENOUGH TO GENERATE SOME CONVERGENCE ALONG THE FRONT. THIS ALSO SUPPORTED BY WK BOUNDARIES SHIFTG NWD ON RADAR. SO DECIDED TO HAVE E-C WI PLACED IN THE WATCH. WATCH NEEDED TO RUN TO 04Z FOR THE MAIN THREAT DOWN S. RISK HERE WL END WELL BEFORE THAT. ALREADY SENT SPS POINTING OUT THE FACT THAT RISK WL END SOONER...AND WATCH WL ALMOST CERTAINLY BE DROPPED BEFORE IT/S EXPIRATION TIME. SECOND CONCERN IS POSSIBLE PNEUMONIA FRONT DEVELOPING OVER THE NRN BAY. ESC GUSTED TO 28 KTS RIGHT BEHIND THE FRONT. BOUNDARY NOW IN THE AREA BTWN RADARS WHERE IT ISN/T VISIBLE. BUT FAIRLY STG/SUSTAINED PRESSURE RISES CONT ACRS ERN LAKE SUPERIOR...SO THINK FRONT IS LIKELY TO CONT SURGING SWD. WITH SC.Y IN PLACE...CONTENT TO HANDLE WITH MWS FOR NOW. WL CONSIDER SMW IF IT WERE TO STRENGTHEN...BUT THAT SEEMS A LITTLE LESS LIKELY NOW THAT CONVECTION OVER ERN UPPER MICHIGAN HAS SHIFTED EWD. SKOWRONSKI DISCUSSION ISSUED AT 226 PM CDT WED JUN 8 2011... SHORT TERM...TNGT AND THU. MAIN FCST ISSUE IS DEALING WITH POTENTIAL SVR LATE THIS AFTERNOON INTO EARLY EVENING AS CDFNT SWINGS THRU THE REST OF WI. EXACTLY HOW MUCH WE COOL OFF FOR THU IS A SECONDARY PBLM. THE 19Z MSAS SFC ANALYSIS INDICATED THE CDFNT STRETECHED FROM JUST WEST OF IMT TO LSE. DEW PTS INITIALLY CRASH INTO THE 40S BEHIND THE FROPA...INDICATING HOW MUCH DRIER THE INCOMING AIR MASS IS. AHD OF THE CDFNT...DEW PTS REMAINED IN THE 60S TO AROUND 70 AND WHEN COMBINED WITH TEMPS IN THE UPR 80S TO LWR 90S...PLENTY OF INSTABILITY/MSTR IN PLACE FOR FURTHER TSTM DEVELOPMENT. THE CDFNT WL COMPLETE ITS PASSAGE THRU ERN WI BY EARLY EVENING... HOWEVER UNTIL THEN...WL NEED TO CARRY SHWR/TSTM WORDING ACROSS THE SE HALF OF THE FCST AREA WITH THE HIGHEST POPS ACROSS E-CNTRL WI. STILL ANTICIPATE CONVECTION TO RE-FIRE AHD OF THE FNT WHERE THE AIR MASS REMAINED MODERATELY TO STRONGLY UNSTABLE. ONCE THIS FNT CLEARS THE AREA...MUCH COOLER/DRIER AIR TO OVERSPREAD THE REMAINDER OF THE STATE WITH TEMPS DROPPING TO NEAR 40 DEGS NORTH TO THE LWR 50S LAKESIDE WITH DEW PTS TUMBLING INTO THE 40S. PLENTY OF CAA LOW CLDS ROTATING SE INTO WI TNGT AND THERE COULD BE SOME SPRINKLES OR DRZL AT TIMES ESP OVER THE NORTH. CDFNT SAGS SOUTH TOWARD CNTRL IL ON THU AND THEN STALLS AS IT ENCOUNTERS THE SE CONUS UPR RDG. HI PRES TO BE LOCATED OVER THE NRN GREAT LKS AND CONTS TO SEND COOL/DRY AIR INTO THE FCST AREA. LOW CLDS SHOULD QUICKLY MIX OUT THU MORNING LEAVING PARTLY CLDY SKIES FOR THE REST OF THE DAY. MAX TEMPS TO BE AROUND 10 DEGS BLO NORMAL ON THU WITH READINGS RANGING FROM THE UPR 50S LAKESIDE TO THE MIDDLE 60S WELL INLAND. LONG TERM...THURSDAY NIGHT THROUGH NEXT WEDNESDAY... MAIN CONCERN DURING FORECAST PERIOD WILL BE TIMING PCPN AS SYSTEMS MOVE THROUGH ZONAL FLOW PATTERN. MODELS ZERO IN ON ON TWO PERIODS FRIDAY INTO EARLY SATURDAY AND MONDAY INTO TUESDAY. HAVE TRENDED TOWARD ENSEMBLES FOR TIMING. TEMPERATURES EXPECTED TO RUN BELOW NORMS EARLY...WARMING TO NEAR NORM BY EARLY NEXT WEEK. THU NIGHT THROUGH SATURDAY PERIOD...WARM FRONT OVER IL TO LIFT SLOWLY INTO SOUTHERN WI. SFC WAVE TO MOVE ALONG FRONT THROUGH SOUTHERN WI FRI EVENING. STRONG WAA/FGEN FORCING AS 850 BAROCLINIC ZONE SHIFTS NORTH THROUGH STATE WILL BRING INCREASING CHANCES OF PCPN TO THE AREA LATE THU NIGHT THROUGH MUCH OF DAY PERIOD FRI. CLOUDS/PCPN AND NE WIND WILL KEEP TEMPS DOWN WELL BELOW NORM DAY PERIOD FRI. WILL CONTINUE SMALL CHANCE OF ELEVATED THUNDER SOUTHERN ZONES ON FRI AS MID LEVEL LAPSE APPROACH 7. UPPER LOW PASSES THROUGH DURING THE EVENING...WITH DIMINISHING PCPN TRENDS FRI NIGHT. ATTM HAVE STAYED WITH POPS THROUGH SAT MORN AS UPPER LOW VCNTY OF STATE. LOW LEVEL MOISTURE AND CYCLONIC FLOW POINTS TO KEEPING THINGS CLOUDY THROUGH MUCH OF DAY SAT...AGAIN HOLDING TEMPS BACK IN THE MID 60'S. AVIATION...SHWRS/TSTMS TO PERSIST AHD OF A SE MOVING CDFNT LATE THIS AFTERNOON INTO EARLY EVENING ACROSS CENTRAL AND EAST-CENTRAL WI. WHILE VFR CONDITIONS ARE EXPECTED FOR THE MOST PART...ANY TSTM ACTIVITY COULD BRING A QUICK REDUCTION TO IFR CIGS AND VSBYS. ONCE THE FNT CLEARS THE AREA...WINDS WL VEER NORTHERLY LATER TNGT WITH CAA LOW CLDS ROTATING INTO THE RGN. CIGS COULD FALL TO MVFR CONDITIONS BETWEEN ROUGHLY 09Z AND 15Z THU. ONCE MIXING TAKES PLACE LATER THU MORNING...VFR CONDITIONS WL RETURN. MARINE...SMALL CRAFT ADVY CONDITIONS TO PERSIST THRU 00Z THU AS SW WINDS GUST AHD OF THE CDFNT. ANY TSTMS THAT DO DVLP LATE THIS AFTERNOON INTO EARLY TNGT WOULD BE CAPABLE OF PRODUCING HAIL AND GUSTY WINDS. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 306 PM CDT WED JUN 8 2011 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-092015- 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- 306 PM CDT WED JUN 8 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS SOUTH AND EAST OF A MARINETTE TO WAUTOMA LINE LATE THIS AFTERNOON AND EVENING AS A STRONG COLD FRONT SWINGS THROUGH THE REGION. DAMAGING WINDS AND LARGE HAIL ARE THE PRIMARY THREATS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH WEDNESDAY THUNDERSTORMS ARE POSSIBLE THURSDAY NIGHT THROUGH FRIDAY NIGHT...BUT SEVERE STORMS ARE NOT ANTICIPATED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED ACROSS EASTERN WISCONSIN LATE THIS AFTERNOON INTO EARLY EVENING. LMZ521-522-541>543-092015- THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN- 306 PM CDT WED JUN 8 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST LAKE MICHIGAN AND THE WATERS OF GREEN BAY. .DAY ONE...TONIGHT SCATTERED STRONG THUNDERSTORMS ARE EXPECTED TO RE- DEVELOP LATE THIS AFTERNOON AND EVENING. FOG COULD CONTINUE TO POSE A HAZARD TO BOATERS AT TIMES...ESPECIALLY OVER THE LAKE. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH WEDNESDAY THUNDERSTORMS ARE POSSIBLE THURSDAY NIGHT THROUGH FRIDAY NIGHT...BUT SEVERE STORMS ARE NOT EXPECTED AT THIS TIME. AK/TE
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 522 PM CDT WED JUN 8 2011 WIZ022-038>040-045-048>050-090000- DOOR-OUTAGAMIE-BROWN-KEWAUNEE-WAUSHARA-WINNEBAGO-CALUMET- MANITOWOC- INCLUDING THE CITIES OF...STURGEON BAY...APPLETON...GREEN BAY... ALGOMA...WAUTOMA...OSHKOSH...CHILTON...TWO RIVERS 522 PM CDT WED JUN 8 2011 ...SCATTERED THUNDERSTORMS EXPECTED THIS EVENING...A FEW OF WHICH COULD BE SEVERE... SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS EAST- CENTRAL WISCONSIN THIS EVENING. A FEW OF THE STORMS COULD STRENGTHEN TO SEVERE LEVELS...AND PRODUCE LARGE HAIL AND DAMAGING WINDS. THE POTENTIAL FOR SEVERE STORMS WILL BE GREATEST FROM GREEN BAY AND THE FOX CITIES...EAST...TO THE LAKESHORE. A SEVERE THUNDERSTORM WATCH IS TECHNICALLY IN EFFECT FOR THIS AREA UNTIL 1100 PM. BUT EAST-CENTRAL WISCONSIN IS ON THE NORTHWEST FRINGE OF THE AREA WHERE SEVERE STORMS ARE LIKELY...AND THE WATCH WAS ISSUED TO ACCOUNT FOR THE ENTIRE AREA. THE RISK OF SEVERE STORMS OVER EAST-CENTRAL WISCONSIN IS LIKELY TO END MUCH EARLIER THAT IN LOCATIONS TO THE SOUTH AND EAST...SO IT IS ANTICIPATED THAT THE WATCH WILL BE CANCELLED FOR EAST-CENTRAL WISCONSIN WELL BEFORE IT/S SCHEDULED EXPIRATION AT 1100 PM. SKOWRONSKI
The Green Bay radar (KGRB), 63 km away, was scanning. The volume nearest the first event began at 01:00 UTC.
6 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds downed a few trees and tree branches in Oshkosh. A power line was knocked down on Church Street.
Thunderstorm winds downed several trees and power lines near U.S. Highway 10 west of Manitowoc and Two Rivers.
Thunderstorm winds blew a small commodity shed onto the top of a freestall barn at a farm south of Cato.
A farmer lost a 22-acre field of soybeans when they were shredded by thunderstorm winds.
Thunderstorm winds damaged a silo unloader and the west side of a freestall barn at a farm near Cato.
Thunderstorms produced a wind gust to 50 knots at Manitowoc County Airport.
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, June 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: 321319, 321324, 324861, 326288, 326291, 321321.