Scattered strong thunderstorms developed over northeast Wisconsin due to an upper air disturbance and an unstable air mass. One of the storms produced wind damage near Pulaski and Pittsfield.
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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.
Scattered strong thunderstorms developed over northeast Wisconsin due to an upper air disturbance and an unstable air mass. One of the storms produced wind damage near Pulaski and Pittsfield.
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 9, 1:43 PM CST, 2 hours 59 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 243 PM CDT MON JUL 9 2012 .SHORT TERM...TNGT AND TUE. MAIN FCST FOCUS CONTS TO BE ON AFTERNOON SHWR/TSTM CHCS AS A SERIES OF SHORTWAVES DROP SE THRU THE NW FLOW ALOFT. THE 19Z MSAS SFC ANALYSIS SHOWED WEAK AREAS OF HI PRES OVER THE GREAT LKS AND NRN PLAINS. MAIN WEATHER FEATURE THO WAS CLEARLY VSBL ON THE WATER VAPOR SATL IMAGERY WHERE AN IMPRESSIVE SHORTWAVE WAS IN THE PROCESS OF DIVING SE ACROSS LK SUPERIOR. THIS FEATURE COMBINED WITH DAYTIME HEATING WAS HELPING TO GENERATE SCT SHWRS/ TSTMS MAINLY ACROSS FAR ERN WI. MUCH LIKE YESTERDAY...EXPECT ONGOING SCATTERED/ISOLATED SHWR AND TSTM ACTIVITY TO BEGIN LOSING ITS PUNCH AS WE APPROACH SUNSET. FINAL DECISION TO BE MADE CLOSE TO PRESS TIME...BUT FEEL THAT A POP WL LINGER OVER ERN WI...ESPECIALLY WITH THAT SHORTWAVE STILL IN THE PROCESS OF PULLING AWAY. UPON SUNSET...EXPECT TO SEE SKIES BECOME MOSTLY CLEAR WITH LIGHT/VARIABLE WINDS AS HI PRES AT THE SFC REMAINS FIXED OVER THE GREAT LKS. THIS COULD LEAD TO ANOTHER ROUND OF PATCHY FOG ACROSS THE NORTH AND EAST WHERE SOME RAIN HAS FALLEN OVER THE PAST FEW DAYS. HAVE KEPT MIN TEMPS SIMILAR TO LAST NGT AS AIR MASS ALOFT HAS NOT CHANGED MUCH OVER THE PAST 24 HOURS. LOOK FOR READINGS TO RANGE FROM THE UPR 40S/LWR 50S NORTH...55-60 CNTRL/E-CNTRL. STATUS QUO IS THE BEST WAY TO DESCRIBE THE MEAN FLOW ACROSS THE LWR 48 WITH THE UPR RDG PARKED OVER THE ROCKIES AND A NE CONUS UPR TROF. THE PREVAILING NW FLOW ALOFT OVER THE GREAT LKS IS FCST TO SEND ONE MORE SHORTWAVE TROF (EMBEDDED SHORTWAVE) THRU THE REGION ON TUE...THUS ANTICIPATE ANOTHER DAY OF A MIX OF SUN AND CLOUDS IN THE MORNING...FOLLOWED BY AN INCREASING CU FIELD AND ISOLATED SHWRS/TSTMS IN THE AFTERNOON. ONCE AGAIN...INSTABILITY/FORCING/ MOISTURE ARE ALL MARGINAL...SO ANY STORMS THAT DO DEVELOP WL PRODUCE NOTHING MORE THAN SMALL HAIL...A BRIEF GUSTY WIND AND A SHORT DURATION RAINFALL. MAX TEMPS TO BE NEAR NORMAL WITH MOST LOCATIONS REACHING THE UPR 70S TO LWR 80S. .LONG TERM...TUESDAY NIGHT THROUGH NEXT MONDAY. NORTHWEST UPPER FLOW MEANS DRY WEATHER AND NEAR SEASONABLE WEATHER THROUGH THURSDAY. SHOULD GET A DECENT DIURNAL RANGE TO TEMPERATURES DUE TO RELATIVELY LOW DEW POINTS PARTLY DUE BY THE VERY DRY GROUND OVER MOST OF THE AREA. MODELS THEN BRING IN A VERY DIFFUSE UPPER TROUGH FOR FRIDAY THROUGH SUNDAY. WHILE UPPER TOUGHING USUALLY IS ASSOCIATED WITH SOME PRECIPITATION THIS TROUGH IS BROAD AN DIFFUSE AND NOT VERY COLD ALOFT. IN ADDITION...SURFACE FEATURES ARE ALSO WEAK. SO WILL HAVE A CHANCE OF MOSTLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS SATURDAY AND SUNDAY. DEW POINTS WILL LIKELY BE CLIMBING SO IT WILL BECOME MUGGY ONCE AGAIN. AFTER THAT THE MODELS SUGGEST ZONAL FLOW OR FLAT UPPER RIDGING EARLY NEXT WEEK. HEIGHTS ARE HIGHER THAN NORMAL SO IT SHOULD BE VERY WARM. WOULD NOT BE SURPRISED IF WE ARE IN THE VICINITY OF SOME NOCTURNAL THUNDERSTORMS BEING ON THE SOUTHERN EDGE OF THE UPPER JET. && .AVIATION...SCT-BKN VFR CU FIELD HAD DEVELOPED ACROSS NE WI AS DAYTIME HEATING INTERACTED WITH A SE MOVING SHORTWAVE NEAR LK SUPERIOR. RADAR WAS PICKING UP ON SHWRS/TSTMS ACROSS FAR NE WI... UPR MI...LK SUPERIOR AND SOME OF THIS ACTIVITY MAY CLIP THE GRB TAF SITE. OTHERWISE...EXPECT THIS PCPN TO DIMINISH UPON SUNSET ALLOWING SKIES TO BECOME MOSTLY CLR. THERE COULD BE ANOTHER ROUND OF PATCHY FOG ACROSS THE NORTH AND EAST WHICH WOULD BRING MVFR VSBYS TO THE RHI AND GRB TAF SITES. VFR CONDITIONS WL PREVAIL ON TUE...ALTHO CANNOT RULE OUT ISOLATED SHWRS/TSTMS IN THE AFTERNOON. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. && AK/RDM
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 326 PM CDT MON JUL 9 2012 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-102030- 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- 326 PM CDT MON JUL 9 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...TONIGHT ISOLATED THUNDERSTORMS WILL CONTINUE TO AFFECT EASTERN WISCONSIN THIS EVENING. THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING SMALL HAIL...WIND GUSTS TO 45 MPH AND BRIEF HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH MONDAY THERE IS A SLIGHT CHANCE OF THUNDERSTORMS ACROSS NORTH CENTRAL AND NORTHEAST TUESDAY AFTERNOON. SEVERE STORMS ARE NOT ANTICIPATED. THERE IS A CHANCE OF THUNDERSTORMS ON SUNDAY...MAINLY ACROSS NORTHERN WISCONSIN. IT IS TOO EARLY TO DETERMINE WHETHER OR NOT ANY OF THESE STORMS COULD BECOME SEVERE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT. LMZ521-522-541>543-102030- THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN- 326 PM CDT MON JUL 9 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST LAKE MICHIGAN AND THE WATERS OF GREEN BAY. .DAY ONE...TONIGHT ISOLATED THUNDERSTORMS ARE EXPECTED THIS EVENING. THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING SMALL HAIL...WIND GUSTS TO 40 KNOTS AND BRIEF HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH MONDAY THERE IS A SLIGHT CHANCE OF THUNDERSTORMS TUESDAY AFTERNOON. AT THIS TIME...NONE OF THESE STORMS ARE EXPECTED TO BE SEVERE. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS ON SUNDAY. IT IS TOO EARLY TO DISCERN WHETHER ANY OF THESE STORMS COULD BECOME SEVERE. AK
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 319 PM CDT MON JUL 9 2012 WIZ022-073-092130- DOOR-SOUTHERN MARINETTE COUNTY- 319 PM CDT MON JUL 9 2012 ...STRONG THUNDERSTORM TO AFFECT FAR SOUTHEAST MARINETTE AND SOUTHERN DOOR COUNTIES... AT 313 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 6 MILES NORTHWEST OF MARINETTE...MOVING SOUTHEAST AT 25 MPH. ONE HALF INCH DIAMETER HAIL...WINDS UP TO 50 MPH...OCCASIONAL CLOUD TO GROUND LIGHTNING AND BRIEF HEAVY DOWNPOURS ARE POSSIBLE WITH THIS STORM. * THE THUNDERSTORM WILL BE NEAR... MARINETTE BY 330 PM CDT... LITTLE STURGEON AND POTAWATOMI STATE PARK AT 405 PM CDT... STURGEON BAY BY 420 PM CDT... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. KIECKBUSCH
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 525 PM CDT MON JUL 9 2012 WIZ031-038-039-074-092330- BROWN-OUTAGAMIE-SHAWANO-SOUTHERN OCONTO COUNTY- 525 PM CDT MON JUL 9 2012 ...SIGNIFICANT WEATHER ADVISORY... AT 521 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER EXTREME EASTERN SHAWANO COUNTY...MOVING SOUTH AT 20 MPH. PENNY SIZE HAIL...WIND GUSTS TO 40 MPH...OCCASIONAL CLOUD TO GROUND LIGHTNING AND BRIEF HEAVY DOWNPOURS ARE LIKELY WITH THIS STORM. * THE THUNDERSTORM WILL BE NEAR... PULASKI BY 535 PM CDT... PITTSFIELD BY 550 PM CDT... GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. KIECKBUSCH
The Green Bay radar (KGRB), 14 km away, was scanning. The volume nearest the first event began at 22:39 UTC.
1 thunderstorm wind, 1 hail. Local standard time, as filed.
Thunderstorm winds snapped off or uprooted a half dozen trees one mile northeast of Pittsfield on State Highway 32.
The thunderstorm that caused wind damage northeast of Pittsfield also produced hail, up to penny size, that covered the ground.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2012Every state in 2012This day in weather historyWarnings in Wisconsin, July 2012
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: 402188, 402189.