A thunderstorm produced winds estimated near 50 mph at the EAA AirVenture grounds at Wittman Airport in Oshkosh. The strong wind gust caused minor damage to at least two aircraft at the annual aviation event.
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.
A thunderstorm produced winds estimated near 50 mph at the EAA AirVenture grounds at Wittman Airport in Oshkosh. The strong wind gust caused minor damage to at least two aircraft at the annual aviation event.
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 26, 11:49 AM CST, 41 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 1249 PM CDT THU JUL 26 2012 UPDATED AVIATION PORTION FOR 18Z TAF ISSUANCE .SHORT TERM...TODAY THROUGH FRIDAY...PCPN TRENDS ARE THE MAIN FCST CONCERN...ALONG WITH THE POTENTIAL FOR SVR TSTMS THIS AFTERNOON AND EVG. THE RRQ OF A JET STREAK AND AN MCV CONTINUED TO TRIGGER SHOWERS AND ISOLD TSTMS OVER EC WI EARLY THIS MORNING. THIS FORCING IS EXPECTED TO SHIFT EAST BY 12Z...AND SHOULD TAKE THE LINGERING PCPN WITH IT. LOW CLOUDS HAVE FORMED OR ADVECTED INTO THE REGION... BUT SOME CLEARING WAS NOTED OVER WSTRN WI. ATTENTION TURNS TO THE STRONG S/W TROF DROPPING SE FROM SOUTHERN MANITOBA. THIS SYSTEM IS EXPECTED TO MOVE TO NEAR DLH LATE THIS AFTERNOON. FORCING ASSOCIATED WITH THE INCOMING TROF WILL COMBINE WITH MODERATE INSTABILITY (CAPES AROUND 1200 J/KG AND LI'S AROUND -4) TO PRODUCE SCT TSTMS THIS AFTERNOON. WET BULB ZERO HGTS JUST OVER 10K FT WILL BE MUCH MORE FAVORABLE FOR HAIL TODAY...WINDEX VALUES ARE GREATER THAN 50 KTS...AND DEEP LAYER SHEAR (30-40 KTS) IS SUPORTIVE OF ORGANIZED STORMS. SPC HAS MOST OF GRB CWA IN A SLGT RISK...AND THIS SEEMS REASONABLE. THE SVR THREAT SHOULD CONTINUE INTO THE EVG HOURS. THE S/W TROF WILL TRACK RIGHT ACROSS GRB CWA TONIGHT. HAVE EXPANDED LIKELY POPS ACROSS THE NE TWO-THIRDS OF GRB CWA...AND KEPT CHC POPS IN OUR SW COUNTIES. ALTHOUGH THE UPPER TROF WILL BE PULLING OUT OF THE REGION ON FRIDAY...DAYTIME INSTABILITY AND A LINGERING SFC TROF WILL KEEP THE THREAT OF SCT SHRA/TSRA IN THE FCST. COOLER AIR WILL CONTINUE TO MOVE INTO THE REGION TODAY AND TONIGHT. MIXING THROUGH 825-800 MB SUPPORTS MAX TEMPS IN THE UPPER 70S TO MID 80S TODAY. EVEN COOLER TEMPS IN THE 70S AND LOWER 80S ARE ANTICIPATED ON FRIDAY. .LONG TERM...FRI NGT THRU NXT WED. A RATHER STAGNANT UPR PATTERN TO RESIDE ACROSS THE CONUS DURING THE EXTENDED PERIOD WITH UPR TROFS LOCATED OVER THE PACIFIC NW AND ERN CONUS...WHILE THE UPR RDG AXIS REMAINS SITUATED OVER THE SRN PLAINS AND EXTENDS NW INTO THE ROCKIES. THIS WL KEEP NE WI UNDER A NW FLOW ALOFT AND SUSCEPTIBLE TO MID-LEVEL SHORTWAVE TROFS RIDING THE RIM OF THE UPR RDG AND DROPPING SE INTO THE REGION. THUS...A CONTINUATION OF ABOVE NORMAL TEMPS AND PERIODIC CHCS FOR SHWRS AND TSTMS. WEATHER FINALLY SETTLES DOWN A BIT FOR FRI NGT AS A WEAK AREA OF HI PRES SETTLES OVER WI AND BRINGS A COOLER/DRIER AIR MASS TO THE REGION. AS SKIES BECOME MOSTLY CLEAR TO PARTLY CLDY AND WINDS GO LIGHT/VARIABLE...EXPECT TO SEE TEMPS DROP INTO THE UPR 40S TO LWR 50S NORTH...GENERALLY 55-60 DEGS ELSEWHERE. MAY ALSO NEED TO ADD SOME PATCHY FOG TO THE FCST DUE TO RAINFALL OVER THE PAST COUPLE OF DAYS. THE SFC HI SLIPS EAST INTO LWR MI ON SAT ALLOWING FOR WINDS TO GRADUALLY BACK TO THE SW (EXCEPT SE NEAR LK MI) WITH WARMER AIR STARTING TO WORK BACK INTO WI. ONLY CONCERN FOR SAT WL BE THE MOVEMENT OF THE NXT SHORTWAVE TROF ROUNDING THE TOP OF THE UPR RDG. HOWEVER...MOST OF THE MDLS INDICATE THIS FEATURE WOULD SLIDE TO OUR SOUTH AND WEST...THUS HAVE MAINTAINED A DRY FCST. ANOTHER QUIET NGT EXPECTED ACROSS THE FCST AREA SAT NGT AS THE DEPARTED HI PRES STIL HAS ENUF INFLUENCE TO KEEP AWAY ANY SYSTEMS. SOME HI CLOUDS COULD BEGIN TO OVERSPREAD WI LATER SAT NGT AS THE NXT SHORTWAVE TROF PUSHES PUSHES ACROSS SRN SECTIONS OF THE CANADIAN PRARIE. ONSET OF WAA AND THE HI CLOUDS WL PREVENT TEMPS FROM FALLING AS FAR AS FRI NGT. INSTEAD...LOOK FOR MIN TEMPS TO DIP INTO THE UPR 50S TO LWR 60S NORTH...LWR TO MID 60S CNTRL/ E-CNTRL WI. FIRST ISSUE OF DISCENT AMONG THE MDLS OCCURS ON SUNDAY WITH REGARDS TO THE TIMING OF THIS NXT SHORTWAVE TROF. THE GFS/ CANADIAN ARE QUICKER WHILE THE ECMWF IS SLOWER. KNOWING THE FASTER TENDENCIES OF THE FORMER MDLS...TENDED TO FAVOR THE ECMWF WHICH WOULD HOLD OFF PCPN FOR MUCH OF THE DAY. MAY NEED TO LWR POPS TO SLGT CHC AT BEST AND RAISE MAX TEMPS A DEG OR TWO. THE NXT DECENT CHC FOR SHWRS/TSTMS WOULD THEN ARRIVE SUNDAY NGT AS THIS SHORTWAVE TROF MOVES INTO THE GREAT LKS REGION. THIS PCPN CHC COULD EASILY CARRY OVER INTO MON...BUT EXACTLY WHAT PART OF WI WOULD BE FAVORED IS HARD TO DISCERN AT THE MOMENT DEPENDING ON ANY FRONTAL BOUNDARIES FLOATING AROUND...THE EXACT LOCATION OF THE SHORTWAVE TROF AND AMOUNT OF INSTABILITY PRESENT. FCST BECOMES MUCH MORE DIFFICULT HEADED TOWARD THE MIDDLE OF NXT WEEK AS A SERIES OF RELATIVELY WEAK SHORTWAVE TROFS CONT TO MOVE UP AND OVER THE NRN EDGE OF THE UPR RDG AND SLIDE SE INTO THE WRN GREAT LKS. PLENTY OF HEAT AND HUMIDITY WL BE IN PLACE OVER NE WI WITH BOTH TUE AND WED PROVIDING FOR AN UNSTABLE ATM AS EACH OF THESE UPR TROS ARRIVED. HAVE GENERALLY FOLLOWED THE CONSENSUS && .AVIATION...CONVECTION IS MAIN CONCERN FOR THIS AFTERNOON AND THIS EVENING...THEN AREA OF WIDESPREAD SHOWERS AND SCATTERED THUNDERSTORMS ACROSS NORTHEAST WISCONSIN AFTER MIDNIGHT INTO FRIDAY MORNING. FIRST AREA OF SCATTERED SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS NORTHEAST WISCONSIN THROUGH 21Z. MEANWHILE...CONVECTION WILL INCREASE AGAIN ACROSS CENTRAL AND NORTH CENTRAL WISCONSIN AHEAD OF UPPER DISTURBANCE APPROACHING THE STATE FROM THE NORTHWEST. SOME OF THE STORMS THIS AFTERNOON AND EVENING WILL BE CAPABLE OF PRODUCING MVFR/IFR CONDITIONS DUE TO LOW VISIBILITIES DUE TO HEAVY RAIN AND LOW CLOUDS. THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS OVER 30 KNOTS. AFTER MIDNIGHT TONIGHT...IT APPEARS THERE WILL BE AN AREA OF LOCALLY HEAVY RAIN ALONG WITH IFR/MVFR CIGS ACROSS NORTHEAST WISCONSIN. MAIN FOCUS FOR THE HEAVY RAIN WILL BE APPLETON AND GREEN BAY ON NORTHWARD TOWARDS MARINETTE. ANY IFR/MVFR CIGS SHOULD IMPROVE FRIDAY MORNING. ANY LINGERING SHOWERS SHOULD DIMINISH FRIDAY MORNING WITH THE POSSIBILITY OF SOME MORE SHOWERS AND THUNDERSTORMS LATE FRIDAY MORNING AND FRIDAY AFTERNOON. ECKBERG && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 1144 AM CDT THU JUL 26 2012 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-271645- 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- 1144 AM CDT THU JUL 26 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A CHANCE OF THUNDERSTORMS THIS AFTERNOON AND TONIGHT. A FEW STORMS MAY BECOME SEVERE THIS AFTERNOON AND EVENING...WITH LARGE HAIL AND DAMAGING WINDS THE PRIMARY THREATS. SOME OF THE STORMS MAY PRODUCE LOCALLY HEAVY RAIN AS WELL. FOR TONIGHT...THERE IS THE POTENTIAL FOR LOCALLY HEAVY RAIN ACROSS NORTHEAST WISCONSIN AFTER MIDNIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A CHANCE OF THUNDERSTORMS ON FRIDAY. THESE STORMS ARE NOT EXPECTED TO BE SEVERE. THUNDERSTORMS WILL BE POSSIBLE AT TIMES FROM SUNDAY THROUGH WEDNESDAY. HOWEVER...IT IS TOO EARLY TO DETERMINE IF ORGANIZED SEVERE WEATHER WILL DEVELOP DURING THIS PERIOD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING. LMZ521-522-541>543-271645- THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN- 1144 AM CDT THU JUL 26 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST LAKE MICHIGAN AND THE WATERS OF GREEN BAY. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A CHANCE OF THUNDERSTORMS LATE THIS AFTERNOON AND TONIGHT. THE STRONGER STORMS MAY PRODUCE SOME HAIL AND GUSTY WINDS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A CHANCE OF THUNDERSTORMS ON FRIDAY. THESE STORMS ARE NOT EXPECTED TO BE SEVERE. THUNDERSTORMS ARE POSSIBLE AT TIMES FROM SUNDAY THROUGH WEDNESDAY. ECKBERG
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE GREEN BAY WI
1025 AM CDT THU JUL 26 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0430 PM HEAVY RAIN WINCHESTER 46.21N 89.90W
07/25/2012 M1.80 INCH VILAS WI CO-OP OBSERVER
RAINFALL FROM LAST NIGHT AND THIS MORNING.
0642 PM HAIL 2 S MANAWA 44.43N 88.91W
07/25/2012 M0.25 INCH WAUPACA WI PUBLIC
CORRECTED FOR CITY
0740 PM TSTM WND DMG 2 N MACKVILLE 44.37N 88.41W
07/25/2012 OUTAGAMIE WI TRAINED SPOTTER
ONE TREE AND POWERLINES DOWN. TIME ESTIMATED BY RADAR.
0744 PM TSTM WND DMG LITTLE CHUTE 44.28N 88.26W
07/25/2012 OUTAGAMIE WI EMERGENCY MNGR
POWER LINES DOWN AT MONROE ST AND WILLOW ST. TIME
ESTIMATED BY RADAR.
0745 PM TSTM WND GST BRILLION 44.18N 88.06W
07/25/2012 E40.00 MPH CALUMET WI TRAINED SPOTTER
POWER OUT IN BRILLION.
0807 PM TSTM WND GST VALDERS 44.06N 87.88W
07/25/2012 M60.00 MPH MANITOWOC WI TRAINED SPOTTER
GUSTY WINDS AND HALF INCH HAIL REPORTED.
0810 PM TSTM WND GST MANITOWOC 44.08N 87.66W
07/25/2012 E56.00 MPH MANITOWOC WI MESONET
REPORTED AT STRANGEL ELEMENTARY SCHOOL BY WBAY WEATHER
NET. TIME ESTIMATED BY RADAR.
0810 PM TSTM WND GST MANITOWOC 44.08N 87.66W
07/25/2012 M68.00 MPH MANITOWOC WI AWOS
0810 PM MARINE TSTM WIND TWO RIVERS 44.15N 87.56W
07/25/2012 E68.00 MPH MANITOWOC WI TRAINED SPOTTER
DIME SIZE HAIL AND GUSTY WINDS.
0810 PM TSTM WND GST MANITOWOC 44.08N 87.66W
07/25/2012 E68.00 MPH MANITOWOC WI TRAINED SPOTTER
10 TREES DOWN IN TOWN.
0813 PM HAIL TWO RIVERS 44.15N 87.56W
07/25/2012 M1.00 INCH MANITOWOC WI NWS EMPLOYEE
0815 PM HAIL TWO RIVERS 44.15N 87.56W
07/25/2012 E1.75 INCH MANITOWOC WI BROADCAST MEDIA
GOLF BALL SIZE HAIL AS WELL AS A DOWNED FLAG POLE AND
CHAIRS THROWN ACROSS YARD DUE TO STRONG WINDS. REPORT VIA
WLUK NEWS. TIME ESTIMATED BY RADAR.
0509 AM HEAVY RAIN NEW LONDON 44.38N 88.75W
07/26/2012 M1.98 INCH WAUPACA WI TRAINED SPOTTER
12 HOUR TOTAL.
0644 AM HEAVY RAIN 1 S MANITOWOC 44.07N 87.66W
07/26/2012 M2.28 INCH MANITOWOC WI TRAINED SPOTTER
STORM TOTAL.
0705 AM HEAVY RAIN NEW LONDON 44.38N 88.75W
07/26/2012 M2.96 INCH WAUPACA WI CO-OP OBSERVER
STORM TOTAL.
&&
MPCSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
1141 AM CDT THU JUL 26 2012
WIZ019>021-030-031-074-261730-
LANGLADE-MARATHON-MENOMINEE-NORTHERN OCONTO COUNTY-SHAWANO-SOUTHERN
OCONTO COUNTY-
1141 AM CDT THU JUL 26 2012
...STRONG STORM MOVING EAST NEAR ANTIGO...
AT 1138 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR ANTIGO...MOVING EAST AT 25 MPH.
ONE HALF INCH DIAMETER HAIL...WINDS 40 TO 50 MPH...BRIEF HEAVY
DOWNPOURS...ARE POSSIBLE WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
ZOAR... UPPER BASS LAKE... ELTON...
NEOPIT... WHITE LAKE... NEOPIT...
BOULDER LAKE CAMPGROUND... LANGLADE...
GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS
PASSED.
MPCSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 1248 PM CDT THU JUL 26 2012 WIZ020-031-039-074-261830- BROWN-MENOMINEE-SHAWANO-SOUTHERN OCONTO COUNTY- 1248 PM CDT THU JUL 26 2012 ...STRONG STORM MOVING JUST SOUTH OF DUE EAST OVER SOUTHEAST MENOMINEE COUNTY... AT 1246 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER EAST CENTRAL MENOMINEE COUNTY...MOVING EAST-SOUTHEAST AT 30 MPH. PENNY SIZE HAIL...WINDS 40 TO 45 MPH...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... SHAWANO LAKE... HAYES... CECIL... UNDERHILL... PULCIFER... GILLETT... ADVANCE... SPRUCE... OCONTO FALLS... GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. MPC
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 112 PM CDT THU JUL 26 2012 WIZ038-039-048>050-261900- BROWN-CALUMET-MANITOWOC-OUTAGAMIE-WINNEBAGO- 112 PM CDT THU JUL 26 2012 ...STRONG STORM ENTERING THE CENTRAL FOX VALLEY... AT 109 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR APPLETON...MOVING SOUTHEAST AT 35 MPH. PENNY SIZE HAIL...WINDS UP TO 50 MPH...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... KAUKAUNA... HIGH CLIFF STATE PARK... HARRISON... SHERWOOD... ST JOHN... HOLLAND... FOREST JUNCTION... DUNDAS... ASKEATON... HILBERT... BRILLION... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. MPC
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
129 PM CDT THU JUL 26 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0125 PM TSTM WND GST 1 SW OSHKOSH 44.00N 88.56W
07/26/2012 E45 MPH WINNEBAGO WI TRAINED SPOTTER
&&
ASHLEYWThe Green Bay radar (KGRB), 67 km away, was scanning. The volume nearest the first event began at 18:28 UTC.
1 thunderstorm wind. Local standard time, as filed.
A thunderstorm produced winds near 50 mph at the EAA AirVenture grounds at Wittman Airport. The strong wind gust knocked over several dumpsters and three tents. The wind also pushed a light airplane into a parked car and flipped an aircraft onto a P-51 Mustang plane.
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: 385994.