Several rounds of showers and thunderstorms passed through northeast Wisconsin from the early morning of June 19 through the evening of June 21, producing rainfall totals to around 3 inches at some locations during that period. An upper level cyclone moving into the region and a warm front ahead of an approaching surface low aided convective development, as did leftover boundaries from earlier…
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.
Several rounds of showers and thunderstorms passed through northeast Wisconsin from the early morning of June 19 through the evening of June 21, producing rainfall totals to around 3 inches at some locations during that period. An upper level cyclone moving into the region and a warm front ahead of an approaching surface low aided convective development, as did leftover boundaries from earlier convective complexes.
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 21, 3:00 PM CST, 1 hour earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 400 PM CDT TUE JUN 21 2011 .SHORT TERM...TONIGHT AND WEDNESDAY. WARM FRONT SET UP ACROSS SOUTHERN WISCONSIN THIS AFTERNOON. CONVECTION DEVELOPED ALONG THE FRONT ACROSS EASTERN WISCONSIN AND WAS NOW MOVING INTO NORTHEAST WISCONSIN. SOME OF THE STORMS WILL PRODUCE LOCALLY HEAVY RAIN. RAINFALL MAY BE ENHANCED TONIGHT ACROSS THE NORTH AS UPPER JET STREAK PASSES TO THE NORTHEAST. STORMS ARE MOVING FAST ENOUGH TONIGHT THAT SHOULD PREVENT WIDESPREAD FLASH FLOODING... THEREFORE ONLY ISSUED A HYDROLOGICAL OUTLOOK INSTEAD OF A FLASH FLOOD WATCH. ON WEDNESDAY...UPPER LOW APPROACHES FROM THE WEST. UPPER LEVEL ENERGY WILL PIVOT AROUND THE UPPER LOW TO BRING SHOWERS AND SCATTERED THUNDERSTORMS TO THE REGION. THERE IS CONCERN ABOUT THE POTENTIAL FOR MORE HEAVY RAIN AS UPPER LEVEL ENERGY PIVOTS AROUND THE UPPER LOW. ALSO...UPPER LEVEL WINDS WEAK FOR SLOW MOVING STORMS. WILL PASS ON MY CONCERN TO THE EVENING SHIFT ABOUT THIS FEATURE DESPITE MODELS NOT INDICATING HEAVY AMOUNTS OF RAINFALL. WITH PRECIPITABLE WATER VALUES 150 TO 200 PERCENT OF NORMAL...SLOW MOVING STORMS AND SATURATED ATMOSPHERE SHOULD PRODUCE AT LEAST POCKETS OF HEAVY RAIN. WENT BELOW GUIDANCE FOR HIGHS ON WEDNESDAY DUE TO CLOUD COVER AND RAIN. .LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY. MEDIUM RANGE MODELS ARE IN BETTER AGREEMENT WITH THE TRACK AND TIMING OF THE OCCLUDED LOW ACROSS THE GREAT LAKES LATE IN THE WORK WEEK. THE ECMWF EXITS THE LOW QUICKER TO THE NORTH COMPARED TO THE GFS/CANADIAN. WILL TAKE A BLEND OF THE GFS/CANADIAN FOR THE TRACK OF THE LOW. THEREAFTER...UNCERTAINTY INCREASES SUNDAY INTO MONDAY WHEN THE NEXT TROUGH TRACKS ACROSS CENTRAL CANADA. WILL LEAN TOWARDS A GEM/ECMWF FOR SATURDAY ONWARD. WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...OCCLUDED LOW PRESSURE WILL TRACK ACROSS WISCONSIN WEDNESDAY NIGHT AND INTO NORTHERN LOWER MICHIGAN THURSDAY NIGHT. ALTHOUGH ITS DIFFICULT TO DETERMINE EXACTLY WHERE AND HOW MUCH RAIN WILL FALL...BEST GUESS IS THAN FAR NORTHERN WISCONSIN STANDS THE BEST CHANCES WEDNESDAY NIGHT...AND NORTHEAST WISCONSIN ON THURSDAY. INHERITED POPS ALREADY SHOW AT LEAST LIKELIES OVER THESE PERIODS...AND WILL DO JUST SOME MINOR TWEAKING TO THE FORECAST. SHOWERS LOOK TO CONTINUE OVER NE WISCONSIN THURSDAY NIGHT...BUT COULD STILL SEE SOME SPOTTY ACTIVITY OVER CENTRAL WISCONSIN. WITH WIDESPREAD CLOUD COVER...DIURNAL SWINGS IN TEMPS WILL BE SMALL. FRIDAY THROUGH MONDAY...LOW PRESSURE WILL MOVE FROM NORTHERN LOWER MICHIGAN FRIDAY MORNING INTO SE ONTARIO ON SATURDAY. STILL PLENTY OF CYCLONIC FLOW AND MOISTURE THROUGH THE COLUMN AROUND FOR LIGHT SHOWER ACTIVITY TO CONTINUE. DO NOT WANT TO GO MUCH HIGHER THAN LOW CHANCE POPS FOR FRIDAY SINCE THE SYSTEM WILL BE DEPARTING AND WEAKENING AT THE SAME TIME. WILL LEAVE POPS AS ARE. REMAINING COOL AND MOSTLY CLOUDY HOWEVER AND WILL LOWER TEMPS A DEGREE OR TWO. HIGH PRESSURE BUILDS IN LATE FRIDAY NIGHT INTO SATURDAY WHICH WILL HELP DECREASE CLOUDS OVER THIS PERIOD. HIGH PRESSURE WILL HANG ON FOR SUNDAY WITH MODERATING TEMPERATURES. SHORTWAVE TROUGH MOVING ACROSS CANADA WILL DRIVE A COLD FRONT OVER THE WESTERN GREAT LAKES EARLY NEXT WEEK. WILL INTRODUCE SOME POPS ON MONDAY BUT LEAVE THE REST OF THE FORECAST DRY. && .AVIATION... SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS THE AREA FOR THE REST OF THE AFTERNOON AND EVENING. SHOWERS AND STORMS WILL BECOME MORE NUMEROUS THIS EVENING ACROSS THE NORTH. A FEW OF THE STORMS COULD PRODUCE LARGE AND STRONG WINDS SOUTH OF A MERRILL TO STURGEON BAY LINE. SHOWERS WILL CONTINUE OVERNIGHT WITH SCATTERED THUNDERSTORMS. MORE RAIN IS EXPECTED ON WEDNESDAY WITH SCATTERED THUNDERSTORMS. IFR/LIFR/VLIFR CONDITIONS WILL PREVAIL THROUGH MUCH OF TONIGHT AND WEDNESDAY. && .HYDROLOGY... HEAVY RAIN OF THE LAST FEW DAYS AND EXPECTED RAINFALL TONIGHT THROUGH THURSDAY WILL CAUSE AREA RIVERS TO RISE. A FEW RIVERS COULD REACH BANK FULL OR FLOOD STAGE. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. &&
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE GREEN BAY WI 344 PM CDT TUE JUN 21 2011 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-222045- 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- 344 PM CDT TUE JUN 21 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS GENERALLY SOUTH OF A LINE FROM STURGEON BAY TO MERRILL THIS EVENING. SOME STORMS WILL CONTAIN DAMAGING WINDS AND LARGE HAIL. SCATTERED THUNDERSTORMS ARE EXPECTED AFTER MIDNIGHT...BUT ARE NOT EXPECTED TO BE SEVERE. LOCALLY HEAVY RAIN IS EXPECTED ACROSS MUCH OF THE AREA TONIGHT. THE STRONGER THUNDERSTORMS WILL PRODUCE RAINFALL RATES OF 1 TO 2 INCHES PER HOUR. RAINFALL RATES THIS HIGH WILL PRODUCE URBAN STREET FLOODING AND PONDING OF WATER ON AREA HIGHWAYS. WIDESPREAD RAINFALL TOTALS OVER AN INCH ARE EXPECTED WITH LOCAL AMOUNTS OVER 2 INCHES. THE GROUND IS ALREADY SATURATED FROM HEAVY RAIN OF THE LAST FEW DAYS. WATER WILL RISE RAPIDLY IN DITCHES...CREEKS AND SMALL STREAMS. PEOPLE LIVING ALONG RIVERS SHOULD MONITOR THE LATEST RIVER STAGES AND FORECASTS. DENSE FOG COULD REDUCE VISIBILITIES TO LESS THAN 1/4 MILE AT TIMES NEAR LAKE MICHIGAN. AREAS OF DENSE FOG ARE POSSIBLE AT TIMES OVER THE REMAINDER OF THE AREA THROUGH THE NIGHT. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH TUESDAY SHOWERS AND SCATTERED THUNDERSTORMS WILL CONTINUE WEDNESDAY. HEAVY RAINFALL IS STILL POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE REQUESTED TO FORWARD REPORTS OF FLOODING OR MEASURED RAINFALLS OF OVER AN INCH TO THE NATIONAL WEATHER SERVICE IN GREEN BAY. FORMAL SPOTTER ACTIVATION FOR SEVERE WEATHER IS POSSIBLE THIS EVENING FOR LOCATIONS SOUTH OF A STURGEON BAY TO MERRILL LINE. LMZ521-522-541>543-222045- THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN- 344 PM CDT TUE JUN 21 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST LAKE MICHIGAN AND THE WATERS OF GREEN BAY. .DAY ONE...TONIGHT THUNDERSTORMS WILL PRODUCE LOCALLY HEAVY RAIN WITH VISIBILITIES BELOW ONE MILE AT TIMES. SOME OF THE STRONGER THUNDERSTORMS THIS EVENING COULD PRODUCE LARGE HAIL OR STRONG WINDS THAT POSE A HAZARD TO SMALL CRAFT. WINDS AND WAVES ARE EXPECTED TO GENERATE CONDITIONS HAZARDOUS TO SMALL CRAFT ON THE WATERS OF THE BAY AND LAKE ADJACENT TO THE NORTHERN PART OF THE DOOR PENINSULA. FOG WILL POSE A SIGNIFICANT HAZARD TO MARINERS ON THE LAKE SOUTH OF STURGEON BAY THROUGH THE NIGHT. AREAS OF DENSE FOG WITH VISIBILITIES BELOW ONE MILE MAY DEVELOP LATER TONIGHT NORTH OF STURGEON BAY AND OVER THE BAY OF GREEN BAY. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH TUESDAY AREAS OF DENSE FOG WILL LINGER INTO WEDNESDAY MORNING THAT COULD REDUCE VISIBILITIES BELOW ONE MILE. SHOWERS AND SCATTERED THUNDERSTORMS ARE ALSO EXPECTED TO CONTINUE WEDNESDAY. THE STRONGEST STORMS COULD PRODUCE HEAVY RAIN AND GUSTY WINDS.
The national radar mosaic for the moment the first event began.
2 heavy rain. Local standard time, as filed.
Thunderstorms dropped a quick 1.25 inches of rain in Weyauwega, causing brief flooding on U.S. Highway 10 between Weyauwega and Fremont.
A slow-moving area of thunderstorms with heavy rainfall produced minor urban flooding of streets and low-lying areas in Neenah.
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: 328878, 328876.