Elevated thunderstorms moved from west to east along the Wisconsin/Michigan border during the early morning hours. The storms produced hail from penny to golf ball size in the vicinity of Florence.
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.
Elevated thunderstorms moved from west to east along the Wisconsin/Michigan border during the early morning hours. The storms produced hail from penny to golf ball size in the vicinity of Florence.
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 7, 2:50 AM CST, 2 hours 7 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 350 AM CDT TUE JUN 7 2011 .SHORT TERM...TODAY THROUGH WEDNESDAY. HEAT AND THUNDERSTORM PROSPECTS ARE THE MAIN CHALLENGE FOR THIS PART OF THE FORECAST. ELEVATED THUNDERSTORMS NEAR THE WISCONSIN AND MICHIGAN BORDER WILL LIKELY STRADDLE THE BORDER THIS MORNING BEFORE DISSIPATING LATER TODAY. A SURFACE WARM FRONT WILL BE LIFTING NORTH ACROSS THE REGION TODAY...BUT AIR IS VERY WARM ALOFT SO EXPECT THAT LITTLE OR NO CONVECTION WILL OCCUR ALONG IT. RECORD HIGH TEMPERATURES POSSIBLE OVER MUCH OF THE AREA TODAY. HEAT INDICES WILL BE CLOSE TO ADVISORY CRITERIA FOR AWHILE IN THE AFTERNOON BUT WILL PROBABLY STAY JUST SHORT OF IT...SO WILL ISSUE A SPECIAL WEATHER STATEMENT INSTEAD. AIR TEMPERATURES WILL BE IN THE 90S SO IT WILL BE VERY HOT EITHER WAY. SOME NOCTURNAL CONVECTION POSSIBLE LATE TONIGHT MAINLY IN THE NORTH WITH WARM AND HUMID CONDITIONS. A COLD FRONT WILL MOVE THROUGH WEDNESDAY AFTERNOON AND EVENING. TIMING OF THE FRONT WILL HAVE A BIG BEARING ON HIGHS WEDNESDAY. IF THE FRONT IS SLOW THEN ANOTHER DAY WITH HIGHS IN THE 90S IS POSSIBLE. EXPECT A BROKEN LINE OF THUNDERSTORMS TO ACCOMPANY THE FRONT WITH SOME SEVERE WEATHER POTENTIAL. .LONG TERM...WEDNESDAY NIGHT THROUGH SATURDAY NIGHT. A COUPLE PIECES OF ENERGY FROM A WEST COAST CONUS TROUGH WILL EJECT INTO THE NORTHERN GREAT LAKES OVER THIS PERIOD...WHICH WILL HELP SHOVE THE DOMINANT SUB-TROPICAL RIDGE GRADUALLY TO THE SOUTH AND EAST. WILL HAVE ONE OF THESE PIECES DEPARTING WEDNESDAY NIGHT WHILE A MORE POTENT SHORTWAVE ARRIVES EARLY THIS WEEKEND. MODELS SEEM TO BE IN GOOD AGREEMENT THROUGH 12Z FRIDAY BEFORE STARTING TO DIVERGE. MODEL PREFERENCES ARE NOT CLEAR THEREAFTER...SO WILL KEEP FORECAST CHANGES MINIMAL. WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...POTENT COLD FRONT WILL BE POSITIONED FROM NORTHEAST TO SOUTH-CENTRAL WISCONSIN AT THE START OF WEDNESDAY EVENING. AHEAD OF THE FRONT...WILL HAVE PLENTY OF INSTABILITY FOR STRONG TO SEVERE STORMS...TO THE TUNE OF 2500-3000 J/KG OF ML CAPE. BULK SHEAR VALUES DEPEND ON THE PARTICULAR MODEL...BUT THE LATEST SREF SHOWS ABOUT 30KTS WHICH IS CLOSE TO THE AVERAGE OF THE OPERATIONAL MODELS. THOUGH CAPE WILL BE DIMINISHING RAPIDLY IN THE EVENING...WILL STILL HAVE A COUPLE HOUR PERIOD WHEN SEVERE STORMS WILL BE POSSIBLE...MOSTLY FOR DAMAGING WINDS AND LARGE HAIL. MODELS KEEP SOME PRECIP OVERNIGHT...BUT THE FRONT LOOKS TO SAG FAR ENOUGH SOUTHEAST WHERE I CAN TRIM BACK POPS A BIT. COOLER AND FAR LESS HUMID AIR WILL INVADE THE AREA BEHIND THE FRONT LATE WEDNESDAY NIGHT INTO THURSDAY. 925MB TEMPS SUGGEST ONLY MID TO UPPER 60S FOR HIGHS...BUT WILL BE OFF TO A FAIRLY WARM START ALREADY. SUPPOSE NE WINDS WILL HAVE POTENTIAL TO KEEP THE DIURNAL CURVE FAIRLY LOW...BUT WILL STILL RAISE TEMPS A DEGREE OR TWO IN THE EAST. FOR THURSDAY NIGHT...MODELS ARE FAR LESS AGGRESSIVE DRIVING THE FRONT TO THE SOUTH...AND HANG UP THE 850MB FRONT ALONG THE IL/WI BORDER. THIS MAKES SENSE GIVEN THE LOCATION OF THE JET STREAM...SO CHANCE POPS OVER CENTRAL WISCONSIN LOOKS GOOD. FRIDAY AND SATURDAY...850MB BAROCLINIC ZONE WILL BE LINGERING OVER SOUTHERN WISCONSIN ON FRIDAY AND REMAIN RELATIVELY STATIONARY. AS A RESULT...WILL ADD A LOW CHANCE OF POPS ACROSS THE SOUTHERN FORECAST AREA. SHORTWAVE TROUGH WILL MOVE ACROSS THE AREA FRIDAY NIGHT INTO SATURDAY...WHICH IS FASTER THAN THE MODELS SHOWED LAST NITE. WILL SPREAD POPS INTO NORTHERN WISCONSIN FRIDAY NIGHT...AND CURRENT POPS LOOK GOOD ON SATURDAY. PRECIP THEN EXITS SATURDAY NIGHT. TEMPERATURES TO REMAIN BELOW NORMAL EACH DAY. && .AVIATION...PATCHY DENSE FOG WILL DISSIPATE EARLY TODAY. PARTLY SUNNY AND HAZY WEATHER EXPECTED LATER TODAY...WITH SCATTERED THUNDERSTORMS NEAR THE MICHIGAN BORDER. AIR TEMPERATURES IN THE 90S AND HIGH RELATIVE HUMIDITIES COULD PRODUCE DENSITY ALTITUDE CONSIDERATIONS FOR AIRCRAFT CONSTRAINED BY WEIGHT OR SHORT RUNWAYS. && .MARINE...WARM AND MOIST AIR MOVING OVER THE COOL WATER OF LAKE MICHIGAN MAY PRODUCE MARINE FOG...WHICH COULD BE DENSE IN SOME PLACES. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. && RDM/MPC
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 1003 PM CDT MON JUN 6 2011 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-071100- 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- 1003 PM CDT MON JUN 6 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...TONIGHT THERE IS A SLIGHT CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. IF ANY STORMS DEVELOP...THEY COULD PRODUCE HAIL AND GUSTY WINDS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH MONDAY THERE IS A CHANCE OF THUNDERSTORMS FROM TUESDAY THROUGH WEDNESDAY NIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER NORTHERN WISCONSIN TUESDAY AND TUESDAY NIGHT...AND ACROSS THE AREA ON WEDNESDAY AFTERNOON AND EVENING. DAMAGING WINDS AND LARGE HAIL WILL BE THE PRIMARY THREATS. HOT AND HUMID WEATHER IS ALSO EXPECTED ON TUESDAY AND WEDNESDAY... WITH HEAT INDICES RISING INTO THE MID TO UPPER 90S IN PARTS OF CENTRAL AND EAST-CENTRAL WISCONSIN. .SPOTTER INFORMATION STATEMENT... SPOTTER GROUP ACTIVATION IS NOT EXPECTED TO BE NEEDED OVERNIGHT. LMZ521-522-541>543-071100- THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN- 1003 PM CDT MON JUN 6 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST LAKE MICHIGAN AND THE WATERS OF GREEN BAY. .DAY ONE...TONIGHT THERE IS A SLIGHT CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. IF ANY STORMS DEVELOP...THEY COULD PRODUCE HAIL AND GUSTY WINDS. FOG IS ALSO EXPECTED TO DEVELOP OVERNIGHT...AND IT COULD BECOME DENSE ENOUGH TO POSE A HAZARD TO BOATERS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH MONDAY THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS WEDNESDAY AFTERNOON AND EVENING. DAMAGING WINDS AND LARGE HAIL WILL BE THE PRIMARY THREATS. FOG COULD ALSO POSE A HAZARD TO BOATERS AT TIMES THROUGH WEDNESDAY NIGHT. JS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 404 AM CDT TUE JUN 7 2011 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-071815- 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- INCLUDING THE CITIES OF...EAGLE RIVER...RHINELANDER...CRANDON... TOMAHAWK...ANTIGO...KESHENA...STURGEON BAY...WAUSAU... WISCONSIN RAPIDS...STEVENS POINT...APPLETON...GREEN BAY... ALGOMA...WAUTOMA...OSHKOSH...CHILTON...TWO RIVERS...CRIVITZ 404 AM CDT TUE JUN 7 2011 ...HOT AND HUMID WEATHER EXPECTED TODAY... RECORD HIGH TEMPERATURES IN THE 90S ARE POSSIBLE OVER ALL BUT THE LAKESHORE AREAS TODAY. THE COMBINATION OF THE HOT TEMPERATURES AND SIGNIFICANT HUMIDITY WILL PRODUCE HEAT INDICES BETWEEN 95 AND 100 THIS AFTERNOON. THIS COMBINATION OF HEAT AND HUMIDITY CAN BE HAZARDOUS TO THOSE WHO WORK OR EXERCISE OUTDOORS. IF YOU WORK OR EXERCISE OUTSIDE...TAKE FREQUENT BREAKS TO DRINK WATER AND FIND SOME SHADE. RESIDENTS WITHOUT AIR CONDITIONING SHOULD CONSIDER SPENDING TIME IN AN AIR CONDITIONED PLACE SUCH AS A LIBRARY OR STORE DURING THE HOTTEST PART OF THE DAY. THOSE RESPONSIBLE FOR THE ELDERLY OR DISABLED SHOULD CHECK ON THEIR WELFARE. RDM
The Marquette radar (KMQT), 89 km away, was scanning. The volume nearest the first event began at 10:56 UTC.
2 hail. Local standard time, as filed.
A severe thunderstorm produced strong winds and golf ball size hail which whitened the ground west of Florence.
A thunderstorm produced penny size hail that covered the ground in Florence.
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: 321164, 321165.