Thunderstorms produced heavy rainfall and hail as they moved through east-central Wisconsin.
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 produced heavy rainfall and hail as they moved through east-central Wisconsin.
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 18, 2:22 AM CST, 5 hours 19 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 322 AM CDT SUN JUL 18 2010 .SHORT TERM...TODAY/TONIGHT/MONDAY. EARLY THIS MORNING A BAND OF STRONG STORMS DEVELOPED IN AN AREA OF CONVERGENCE SOUTH OF OSH ON THE NOSE OF OUTFLOW BOUNDARY FROM WESTERN WISCONSIN WEAKENED CONVECTION EARLIER TONIGHT. THIS BAND OF STORMS BRUSHED THE EXTREME FAR SOUTHERN PORTIONS OF CALUMET AND MANITOWOC BEFORE DRIFTING SOUTHEAST. OTHERWISE A BAND OF SHOWERS WERE MOVING OVER NORTHEAST WISCONSIN EARLY THIS MORNING. FOCUS TURNS TO WESTERN WISCONSIN WITH THE NEXT ROUND OF STORMS TO TRACK OVER PART OF THE AREA. CONVECTION FOCUSED ALONG AND NORTH OF A SURFACE WAVE AND AHEAD OF A MID LEVEL TROF WHICH WILL TRACK OVER MAINLY NORTH CENTRAL AND PART OF CENTRAL WISCONSIN MAINLY DURING THE MORNING HOURS BEFORE EXITING NORTHEAST WISCONSIN AND THE LAKESHORE EARLY THIS AFTERNOON. EXPECT THIS PCPN TO HOLD TOGETHER AND WILL PASS OVER AREAS MAINLY NORTH OF AUW TO GRB LINE. RADAR SHOWS NO CONVECTION SOUTH OVER CENTRAL WISCONSIN AT 08Z...BUT A CDFNT FROM THIS SURFACE WAVE AND THE MID LEVEL TROF WILL SWING OVER TODAY...AGAIN MAINLY IN THE MORNING OVER CENTRAL WI. AT 08Z CDFNT WAS OVER CENTRAL MN INTO IA. WILL INCLUDE SCT MENTION WITH ANTICIPATION OF FURTHER DEVELOPMENT ALONG THE FROPA. AREAS SOUTHEAST OF A LINE FROM CRIVITZ TO SHAWANO TO WAUTOMA IN A SPC SLIGHT RISK TODAY UNTIL THE FROPA AND MID LEVEL TROF PASSES EAST...AT THIS TIME EXITING EASTERN WISCONSIN BETWEEN 18 AND 20Z. SOME DECENT INSTABILITY TO WORK WITH TODAY AS THE FRONT WORKS OVER ESPECIALLY IF SOME BREAKS IN THE CLOUD COVER OCCUR. WEAK HIGH PRESSURE THEN SETTLES INTO THE STATE TONIGHT INTO MONDAY FOR A PERIOD OF QUIETER WEATHER. .LONG TERM...MONDAY NIGHT THROUGH NEXT SATURDAY. THE UPPER FLOW PATTERN SHOULD BE VERY TYPICAL OF MID SUMMER WITH THE WEST TO EAST JET STREAM ALONG THE UNITED STATES CANADA BORDER WITH WEAK RIDGING TO THE SOUTH. TIMING OF THE JET STREAKS MOVING THROUGH THE FLOW IS USUALLY CHALLENGING IN THIS FLOW PATTERN. IN ADDITION...THERE WILL LIKELY BE A FRONTAL BOUNDARY NOT TOO FAR FROM WISCONSIN FOR MOST OF THE WEEK. THE FRONTAL POSITION LOOKS TO BE FURTHER SOUTH THAN EARLIER RUNS...SO IT MAY NOT BE QUITE AS WARM AND HUMID AS IT LOOKED LIKE A FEW DAYS AGO. BECAUSE THE TIMING OF THE JET STREAKS AND POSITION OF THE FRONTAL BOUNDARY WILL BE DIFFICULT...STAYED AWAY FROM EXTREMES OF POPS AND TEMPERATURES. BEST CHANCE OF THUNDERSTORMS SHOULD BE THURSDAY AND FRIDAY BASED ON BEST LOW LEVEL WARM ADVECTION AND UPPER SUPPORT. && .AVIATION...MVFR CIGS TO PERSIST TODAY WITH SCT IFR VSBYS DUE TO SCT CONVECTION. EXPECT VFR CONDITIONS TO DEVELOP LATER TODAY FROM WEST TO EAST. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. && TDH/RDM
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 555 AM CDT SUN JUL 18 2010 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-191100- 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- 555 AM CDT SUN JUL 18 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...TODAY AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE STORMS TODAY SOUTHEAST OF LINE FROM CRIVITZ TO SHAWANO TO WAUTOMA. THUNDERSTORMS WILL CONTINUE TO DEVELOP ALONG AND AHEAD OF A COLD FRONT TRACKING OVER WISCONSIN TODAY. THE AIR MASS REMAINS RELATIVELY UNSTABLE THIS MORNING AHEAD OF THE FRONT AND IF MORNING CLOUDS CAN DIMINISH...THE AIR MASS MAY BECOME VERY UNSTABLE PRIOR TO COLD FRONT PASSAGE. LARGE HAIL AND DAMAGING WINDS WOULD BE THE PRIMARY THREATS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY AT LEAST A COUPLE ADDITIONAL ROUNDS OF THUNDERSTORMS WILL OCCUR DURING THE UPCOMING WEEK. BUT THE WEATHER PATTERN MAKES IT VERY DIFFICULT TO DETERMINE WHEN THEY WILL OCCUR. HOWEVER...THE OVERALL PATTERN SUGGESTS THAT THERE COULD BE A RISK OF SEVERE STORMS AT SOME POINT. BE SURE TO MONITOR LATER FORECASTS FOR MORE DETAILS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY. LMZ521-522-541>543-191100- THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN- 555 AM CDT SUN JUL 18 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST LAKE MICHIGAN AND THE WATERS OF GREEN BAY. .DAY ONE...TODAY AND TONIGHT A LOW PRESSURE AREA WILL DRAG A COLD FRONT OVER THE LAKESHORE REGION THIS AFTERNOON. THUNDERSTORMS WILL CONTINUE TO DEVELOP ALONG AND AHEAD OF A COLD FRONT TRACKING OVER WISCONSIN TODAY. A FEW STORMS MAY CONTAIN WIND GUSTS HAZARDOUS TO SMALL CRAFT. SOUTHEAST WINDS WILL ALSO TURN NORTHEAST THIS AFTERNOON AND MAY BECOME GUSTY OVER DOOR COUNTY IN THE COLD FRONTS WAKE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY AT LEAST A COUPLE ADDITIONAL ROUNDS OF THUNDERSTORMS WILL OCCUR DURING THE UPCOMING WEEK. BUT THE WEATHER PATTERN MAKES IT VERY DIFFICULT TO DETERMINE WHEN THEY WILL OCCUR.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 433 AM CDT SUN JUL 18 2010 WIZ030-035-036-181200- MARATHON-WOOD-PORTAGE- INCLUDING THE CITIES OF...WAUSAU...WISCONSIN RAPIDS... STEVENS POINT 433 AM CDT SUN JUL 18 2010 ...THUNDERSTORMS WITH HEAVY RAINFALL APPROACHING CENTRAL WISCONSIN... A CLUSTER OF THUNDERSTORMS OVER WESTERN WISCONSIN NEAR EAU CLAIRE WILL WORK INTO PARTS OF CENTRAL WISCONSIN AFTER 5 AM. BETWEEN 1 TO 2 INCHES OF RAINFALL MAY OCCUR BETWEEN 5 AM AND 7 AM WITH THE STRONGER STORMS. THE STORMS MAY ALSO CONTAIN SMALL HAIL AND GUSTY WINDS. WIZ010-018-019-181200- ONEIDA-LINCOLN-LANGLADE- INCLUDING THE CITIES OF...RHINELANDER...TOMAHAWK...ANTIGO 433 AM CDT SUN JUL 18 2010 ...THUNDERSTORMS WITH HEAVY RAINFALL DEVELOPING OVER NORTH-CENTRAL WISCONSIN... MORE SHOWERS WITH EMBEDDED THUNDERSTORMS WILL SPREAD OVER PARTS OF NORTH CENTRAL WISCONSIN THIS MORNING. BETWEEN 1 TO 2 INCHES OF RAINFALL WILL LIKELY OCCUR BY 9 AM WITH LOCALLY HIGHER AMOUNTS NEAR 3 INCHES POSSIBLE. THE STORMS MAY ALSO CONTAIN SMALL HAIL AND GUSTY WINDS. TDH
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 820 AM CDT SUN JUL 18 2010 WIZ037>039-045-048-049-181430- WAUPACA-OUTAGAMIE-BROWN-WAUSHARA-WINNEBAGO-CALUMET- INCLUDING THE CITIES OF...APPLETON...GREEN BAY...WAUTOMA... OSHKOSH...CHILTON 820 AM CDT SUN JUL 18 2010 ...THUNDERSTORMS WITH HEAVY RAIN IN EAST-CENTRAL WISCONSIN... A CLUSTER OF SHOWERS AND THUNDERSTORMS...SOME WITH HEAVY RAIN...WILL SHIFT ACROSS EAST-CENTRAL WISCONSIN DURING THE MORNING. AT 815 AM...RADAR SHOWED THAT THE STRONGEST STORMS IN THE CLUSTER WERE LOCATED ACROSS WAUPACA AND EASTERN WAUSHARA COUNTIES. THEY WERE MOVING EAST AT 35 MPH...AND WILL MOVE ACROSS OUTAGAMIE...WINNEBAGO...WESTERN BROWN...AND WESTERN CALUMET COUNTIES THROUGH 915 AM. THE STRONGEST STORMS WILL PRODUCE BRIEF HEAVY RAINFALL...AND PRODUCE WIDESPREAD 1/2 TO 3/4 INCH RAINFALLS. A FEW LOCATIONS WILL RECEIVE OVER AN INCH OF RAIN. ANYONE TRAVELING ACROSS THE AREA THIS MORNING SHOULD REMAIN ALERT FOR THE POSSIBILITY OF ENCOUNTERING VERY HEAVY RAIN WHICH WILL SERIOUSLY RESTRICT VISIBILITIES ON THE ROADWAY. SKOWRONSKI
The Green Bay radar (KGRB), 67 km away, was scanning. The volume nearest the first event began at 13:42 UTC.
1 hail. Local standard time, as filed.
Thunderstorms produced nickel size hail near Oshkosh on Sand Pit Road just north of State Highway 21.
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: 247656.