A cold front moving across northern Wisconsin triggered scattered thunderstorms. Some of the storms merged and produced damaging winds in Vilas County and an estimated gust of 58 mph on Washington Island.
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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 GRB wrote it up.
A cold front moving across northern Wisconsin triggered scattered thunderstorms. Some of the storms merged and produced damaging winds in Vilas County and an estimated gust of 58 mph on Washington Island.
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 Jul 11, 2:05 PM CST, 1 hour 51 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 305 PM CDT SUN JUL 11 2010 .SHORT TERM...TONIGHT AND MONDAY. MID LEVEL CIRCULATION THAT WAS ACROSS NORTHEAST IOWA THIS MORNING WAS WORKING INTO EAST CENTRAL AND NORTHEAST WISCONSIN THIS AFTERNOON. THE COMBINATION OF DAYTIME HEATING AND MID LEVEL CIRCULATION TRIGGERED SCATTERED THUNDERSTORMS. SOME OF THE STRONGER STORMS PRODUCED WIND GUSTS TO 40 MPH AND PRODUCED TORRENTAIL RAINS AND SMALL HAIL. ACROSS CENTRAL WISCONSIN...REMNANTS OF CONVECTION THIS MORNING HAS HELD THINGS IN CHECK FOR THE TIME BEING. MEANWHILE...COLD FRONT WAS NOW WORKING INTO NORTHWEST WISCONSIN THIS AFTERNOON. CONVECTION WAS BREAKING OUT ALONG THE FRONT. FOR TONIGHT...WILL HAVE PERIODS OF SHOWERS AND THUNDERSTORMS WITH ACTIVITY ENDING OR DIMINISHING LATE THIS EVENING INTO THE OVERNIGHT PERIOD. DID NOT STRAY FAR FROM LOWS FROM PREVIOUS FORECAST. THE BIG ISSUES FOR LATE TONIGHT INTO MONDAY WAS THE POSSIBILITY OF PHASING. THE 12Z WRF HAS BACKED OFF ON THIS SOLUTION...THEREFORE PRECIPITATION WILL NOT BE AS EXTENSIVE OVERNIGHT. HAVE LOWERED PRECIPITATION AMOUNTS OVERNIGHT INTO MONDAY MORNING. MODELS CONTINUE TO SHOW SOME LIGHT QPF ON MONDAY OVER THE SOUTH...THEREFORE CONTINUED CHANCES FOR SHOWERS AND POSSIBLY A THUNDERSTORM. DID LOWER RAIN CHANCES...EXPECTING CONVECTION TO BE ISOLATED TO WIDELY SCATTERED AT BEST. .LONG TERM...MONDAY NIGHT THROUGH NEXT SUNDAY. FORECAST CONCERNS CONTINUE TO BE ON PCPN CHANCES/SEVERE POTENTIAL WED NIGHT TIME FRAME. MODELS SHOWING GOOD CONSISTENCY THROUGH WED NIGHT/THU...BRINGING UPPER LOW EAST THROUGH CANADA...INTO HUDSON BAY BY THU EVENING. THEREAFTER...PROGRESSIVE ZONAL FLOW CREATING ISSUES WITH STRENGTH AND SPEED OF SHORT WAVES MOVING THROUGH FLOW. ECMWF SHOWING SUSPECT DEEPENING OF SYSTEM FRI NIGHT...WHILE GFS SUSPECT WITH SURFACE LOW DEVELOPMENT OVER NORTHERN PLAINS ON SAT. BOTH POINT TO A FRONT MOVING THROUGH FRI NIGHT/SAT TIME FRAME. WITH ISSUES STATED PREVIOUSLY...WILL STAY WITH LOW CHANCE POPS FRI NIGHT AND SAT...STAYING DRY FOR REMAINDER OF THE LATER EXTENDED PERIODS. IN NEAR TERM...HIGH PRESSURE BUILDING IN BEHIND FRONT PASSING THROUGH TONIGHT WILL LEAD TO DRY PERIOD. EASTERLY FLOW WILL KEEP LAKESIDE COOLER TUE/WED. LITTLE CHANGE IN THOUGHTS ON WED NIGHT SYSTEM. MODELS A BIT FASTER WITH SYSTEM AND MADE SOME ADJUSTMENTS THERE. CIN ON BOTH GFS/ECMWF HIGH OVER CENTRAL AND NORTHEAST WI WED AFTN/EVENING WITH 700H TEMPS NEAR 11C. SHEAR IMPROVES WED NIGHT AS JET LIFTS NORTH THROUGH NW WI/UPPER MI AND MAY BE ENOUGH TO OVERCOME CIN...THOUGH WILL STAY WITH LOW/NO POPS WED AFTN. PERIOD STILL TO BE HIGHLIGHTED IN HWO...WITH UNCERTAINTY ON SEVERE THREAT GIVEN FRONTAL PASSAGE OVERNIGHT PERIOD. && .AVIATION...SCATTERED CONVECTION BROKE ACROSS EAST CENTRAL AND NORTHEAST WISCONSIN IN RESPONSE TO MORE SUNSHINE THIS MORNING AND UPPER LEVEL FEATURE MOVING INTO EAST CENTRAL WISCONSIN. THESE STORMS ARE CAPABLE OF PRODUCING TORRENTIAL RAINS WITH VISIBILITIES LESS THAN A MILE FOR BRIEF PERIOD OF TIME. SOME OF THE STRONGER STORMS COULD PRODUCE WIND GUSTS OF 30 TO 40 KNOTS. MEANWHILE... COLD FRONT WORKING INTO NORTHWEST WISCONSIN TRIGGERING CONVECTION ALONG IT. THIS ACTIVITY SHOULD WORK INTO THE AREA THIS EVENING. THE SHOWERS AND STORMS SHOULD DIMINISHING OVER THE NORTHWEST LATER THIS EVENING AND ACROSS THE REMAINDER OF THE AREA OVERNIGHT. A FEW SHOWERS ARE POSSIBLE ON MONDAY FOR AIRPORT SITES GRB...ATW...OSH...MTW...KY50. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. && ECKBERG/TE
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 345 PM CDT SUN JUL 11 2010 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-122045- 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- 345 PM CDT SUN JUL 11 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...TONIGHT ALTHOUGH THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT... WIDESPREAD SEVERE WEATHER IS NOT EXPECTED. AN ISOLATED SEVERE STORM IS STILL POSSIBLE THIS EVENING AS A COLD FRONT MOVES ACROSS THE AREA. SOME OF THE THUNDERSTORMS WILL PRODUCE GUSTY WINDS... BUT LOCALLY HEAVY RAIN APPEARS TO BE THE MAIN THREAT. RAINFALL RATES OF 1 TO 2 INCHES PER HOUR CAN BE EXPECTED IN THE STRONGER STORMS AND WILL PRODUCE URBAN STREET FLOODING AND PONDING OF WATER ON AREA HIGHWAYS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SUNDAY ANOTHER ROUND OF THUNDERSTORMS WILL ARRIVE WEDNESDAY NIGHT INTO THURSDAY. ALTHOUGH IT IS DIFFICULT TO ASSESS THE RISK OF SEVERE WEATHER THAT FAR IN ADVANCE...THE STRENGTH OF THE UPPER LEVEL DISTURBANCE GENERATING THE STORMS SUGGESTS THAT STRONG OR SEVERE STORMS MAY BE POSSIBLE. MORE THUNDERSTORMS ARE POSSIBLE LATE FRIDAY INTO SATURDAY. .SPOTTER INFORMATION STATEMENT... FORMAL SPOTTER ACTIVATION IS NOT ANTICIPATED TONIGHT. THOUGH SPOTTERS ARE URGED TO REPORT ANY FLOODING OR MEASURED RAINFALL AMOUNTS OVER AN INCH TO THE NATIONAL WEATHER SERVICE IN GREEN BAY. LMZ521-522-541>543-122045- THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN- 345 PM CDT SUN JUL 11 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST LAKE MICHIGAN AND THE WATERS OF GREEN BAY. .DAY ONE...TONIGHT HAZARDOUS CONDITIONS CAN BE EXPECTED NEAR THUNDERSTORMS WITH GUSTY WINDS AND DANGEROUS CLOUD TO WATER LIGHTNING STRIKES. SOME OF THE HEAVIER STORMS WILL ALSO PRODUCE HEAVY RAIN THAT COULD REDUCE VISIBILITIES BELOW ONE MILE FOR A BRIEF PERIOD OF TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SUNDAY ANOTHER ROUND OF THUNDERSTORMS WILL ARRIVE WEDNESDAY NIGHT INTO THURSDAY AND THEN AGAIN LATE FRIDAY INTO SATURDAY.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 1243 PM CDT SUN JUL 11 2010 WIZ019>022-030-031-035>040-045-048>050-073-074-111945- 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...ANTIGO...KESHENA...STURGEON BAY... WAUSAU...WISCONSIN RAPIDS...STEVENS POINT...APPLETON... GREEN BAY...ALGOMA...WAUTOMA...OSHKOSH...CHILTON...TWO RIVERS... CRIVITZ 1243 PM CDT SUN JUL 11 2010 ...SCATTERED THUNDERSTORMS DEVELOPING ACROSS THE REGION EARLY THIS AFTERNOON... SCATTERED THUNDERSTORMS WERE DEVELOPING ACROSS CENTRAL...EAST CENTRAL AND NORTHEAST WISCONSIN EARLY THIS AFTERNOON. SCATTERED THUNDERSTORMS WILL CONTINUE TO INCREASE IN COVERAGE AND INTENSITY DURING THE REMAINDER OF THE AFTERNOON. SOME OF THE THUNDERSTORMS THIS AFTERNOON COULD BECOME STRONG TO SEVERE WITH DAMAGING WINDS AND LARGE HAIL. SOME OF THE STRONGER STORMS WILL ALSO PRODUCE LOCALLY HEAVY RAIN...CAUSING SOME URBAN STREET FLOODING AND PONDING OF WATER ON AREA HIGHWAYS. BOATERS ON AREA LAKES AND RIVERS SHOULD SEEK SAFE SHELTER IF THUNDERSTORMS APPROACH YOUR AREA. ECKBERG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 225 PM CDT SUN JUL 11 2010 WIZ019>022-031-036>040-045-048>050-073-074-112130- LANGLADE-MENOMINEE-NORTHERN OCONTO-DOOR-SHAWANO-PORTAGE-WAUPACA- OUTAGAMIE-BROWN-KEWAUNEE-WAUSHARA-WINNEBAGO-CALUMET-MANITOWOC- SOUTHERN MARINETTE-SOUTHERN OCONTO- INCLUDING THE CITIES OF...ANTIGO...KESHENA...STURGEON BAY... STEVENS POINT...APPLETON...GREEN BAY...ALGOMA...WAUTOMA... OSHKOSH...CHILTON...TWO RIVERS...CRIVITZ 225 PM CDT SUN JUL 11 2010 ...SCATTERED THUNDERSTORMS WILL CONTINUE ACROSS CENTRAL AND EAST CENTRAL WISCONSIN THROUGH THE AFTERNOON... AT 2 PM SCATTERED THUNDERSTORMS WERE OCCURRING FROM THE DELLS NORTHEAST TO OCONTO. THE STORMS WERE MOVING EAST TO NORTHEAST AT 20 MPH. LOCALLY HEAVY RAIN WITH RAIN FALL RATES OF 1 TO 2 INCHES AN HOUR IS EXPECTED WITH THE STORMS AS THEY MOVE THROUGH. BRIEF GUSTY WINDS TO AROUND 40 MPH ARE ALSO POSSIBLE. MOTORISTS SHOULD LOOK OUT FOR URBAN STREET FLOODING AND PONDING OF WATER ON AREA HIGHWAYS. BOATERS ON AREA LAKES AND RIVERS SHOULD SEEK SAFE SHELTER IF THUNDERSTORMS APPROACH YOUR AREA. ECKBERG/TE
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 313 PM CDT SUN JUL 11 2010 WIZ005-112115- VILAS- INCLUDING THE CITY OF...EAGLE RIVER 313 PM CDT SUN JUL 11 2010 ...STRONG THUNDERSTORMS MOVING INTO VILAS COUNTY... AT 310 PM...STRONG THUNDERSTORMS EXTENDED FROM NEAR WAKEFIELD... MICHIGAN TO 10 MILES SOUTHWEST OF MERCER. THE THUNDERSTORMS WERE MOVING TO THE EAST AROUND 25 MPH. SOME OF THE STRONGER STORMS COULD PRODUCE WIND GUSTS UP TO 40 MPH...BRIEF HEAVY RAIN AND FREQUENT CLOUD TO GROUND LIGHTNING STRIKES. BOATERS SHOULD TAKE COVER IMMEDIATELY BEFORE THE STORMS REACH YOUR AREA. ECKBERG
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
320 PM CDT SUN JUL 11 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0315 PM HEAVY RAIN WAUTOMA 44.06N 89.28W
07/11/2010 M0.92 INCH WAUSHARA WI TRAINED SPOTTER
TOTAL SINCE 200 PM.
&&
BERSCHThe Green Bay radar (KGRB), 136 km away, was scanning. The volume nearest the first event began at 21:54 UTC.
3 thunderstorm wind. Local standard time, as filed.
Thunderstorms produced an estimated wind gust of 58 mph on Washington Island.
Thunderstorm winds downed power lines in Arbor Vitae. Time of event is estimated.
Thunderstorm winds downed power lines northeast of St. Germain.
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, July 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: 253665, 246786, 246787.