A short wave trough crossing central Wisconsin combined with a moist unstable air mass, where afternoon CAPE values reach 2000 to 3000J/kg, to produce scattered strong to severe thunderstorms over portions of Southeast Wisconsin. Damaging thunderstorm wind gusts and hail up to 3/4 inch in diameter were produced by the thunderstorms.
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 MKX wrote it up.
A short wave trough crossing central Wisconsin combined with a moist unstable air mass, where afternoon CAPE values reach 2000 to 3000J/kg, to produce scattered strong to severe thunderstorms over portions of Southeast Wisconsin. Damaging thunderstorm wind gusts and hail up to 3/4 inch in diameter were produced by the thunderstorms.
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 Milwaukee, WI wrote its last area forecast discussion before the first event at Jul 10, 2:10 PM CST, 1 hour 50 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 310 PM CDT SAT JUL 10 2010 .SHORT TERM... COMPACT SHORT WAVE VCNTY OF WEST CENTRAL WI PER WATER VAPOR IMAGERY AND WIND PROFILERS WL CONTINUE TO PRODUCE SCT CONVECTION ACROSS SRN WI THRU THE AFTN AND EARLY EVE. BULK SHEAR QUITE WEAK BUT ENOUGH CAPE /2-3K J/KG/ TO CARRY STRONG UPDRAFTS ABOVE FREEZING LEVEL WHICH IS ONLY AROUND 10K FEET. WILL NEED TO WATCH STRONGEST UPDRAFTS AND HIGHEST REF CORES. WEAK CORE PASSED OVER MKX EARLIER AND PRODUCED WIND GUSTS TO 28KTS AROUND 19Z. WL CARRY ISOLD MENTION INTO THE EVE TO ACCOUNT FOR SECONDARY UPSTREAM SHORT WAVE OVER WRN MN/ERN DAKOTAS. EMPHASIS OF SHORT TERM ON INCREASING THREAT FOR MORE WIDESPREAD CONVECTION LATE IN THE WEEKEND. UPSTREAM STRONG SHORT WAVE OVER ERN WY PROGRESSES STEADILY EWD TONIGHT AND SUN. MOVEMENT SLIGHTLY FASTER THAN EARLIER THINKING...SO WL BUMP UP POPS SLIGHTLY ACROSS WRN CWA AS WL BE INTERACTING WITH UNSTABLE AIR MASS WITH CAPES AROUND 2K J AND LITTLE CIN. WL CONTINUE LIKELY WORDING FOR SUN NGT BUT THERE WL PROBABLY BE A BREAK IN THE CONVECTION LATER SUN NGT INTO EARLY MON. SECONDARY WEAKER WAVE MAY BRING MORE SHOWERS AND THUNDERSTORMS TO SRN WI LATER MON. BULK SHEAR REMAINS ON THE WEAK SIDE...LESS THAN 30KTS HOWEVER APPROACHING COLD FRONT AND SHORT WAVE WL ACT AS CATALYSTS FOR SCT TO NUMEROUS CONVECTION OVERNIGHT SUN. NAM SOLUTION SHOWING STRONGER SHORT WAVE PUSHING INTO WRN GTLAKES BY EARLY MONDAY...NOT SUPPORTED BY OTHER GUIDANCE SO WL LEAN MORE ON WEAKER ECMWF SOLUTION. MORE STABLE NORTHEAST FLOW SETS UP FOR A TIME ON TUESDAY. .LONG TERM... WL LEAN MORE ON ECMWF AND GEM FOR EARLY PART OF EXTENDED PERIOD AS GFS SHOWING POOR CONTINUITY AND AGREEMENT WITH OTHER GUIDANCE. BAROCLINIC ZONE/FRONTAL BOUNDARY EXPECTED TO BE SOUTH OF WI ON TUE...AND THEN WILL BEGIN TO ADVANCE NWD AHEAD OF APPROACHING STRONG SHORT WAVE ACROSS THE NORTHERN PLAINS ON WED. WL CONTINUE DRY WORDING FOR TUE INTO WED...HOWEVER HAVE CONCERNS OF WARM AIR ADVECTION AND MOISTURE CONVERGENCE WEAKENING THE CAP ENOUGH FOR ISOLD TO SCT CONVECTION ON WED...BUT TRIGGER MECHANISM NOT APPARENT AT THIS TIME SO WL HOLD OFF ON INTRODUCING T FOR NOW ON WED. TAIL END OF VIGOROUS SHORT WAVE SWEEPS THROUGH SRN WI WEDNESDAY NIGHT AND THURSDAY WITH INCREASING THETA-E ADVECTION AND BULK SHEAR. POTENTIAL LINE OF T WITH STRONG WINDS MAY SWEEP THROUGH SRN WI WED NGT...EXITING ERN AREAS EARLY THU. MID LEVEL DRYING AND SHORT WAVE EXITING TO THE EAST ON THU SO REMOVED LINGERING SCHC POPS THU NGT. UNCERTAINTY INCREASES FOR LATE IN THE PERIOD AS GUIDANCE HAVING ISSUES WITH TRANSITION PERIOD BETWEEN LONG WAVE TROUGH OVER HUDSON BAY AREA AND UPSTREAM AMPLIFYING TROFING OVER NW CONUS INTO SW CAN. FOR NOW WL CONT DRY WORDING FOR FRI AND EXTEND INTO SAT AS NOT ENUF EVIDENCE TO GO OTHERWISE. GFS 5-DAY 5H ANOMOLIES STILL TRENDING TOWARD MORE RIDGING ACROSS S CENTRAL AND SE CONUS WITH WARM/HOT AND MORE HUMID CONDITIONS SLIPPING BACK INTO SRN WI BY THE WEEKEND. && .AVIATION...APPROACHING SHORTWAVE COMBINED WITH IMPRESSIVE INSTABILITY RESULTING IN ISOLATED/SCATTERED CONVECTIVE DEVELOPMENT INTO THE EVENING HOURS. 0-6KM SHEAR AND MID LEVEL LAPESE RATES NOT FAVORABLE. QUIET THEN INTO SUNDAY MORNING. KMSN AND POINTS WEST WILL LIKELY BE AFFECTED BY CONVECTION WITH NEXT SYSTEM SUNDAY AFTERNOON SPREADING ACROSS THE REST OF SOUTHERN WI SUNDAY NIGHT. && .FORECAST CONFIDENCE... TONIGHT AND SUNDAY...MEDIUM SUNDAY NIGHT AND MONDAY...LOW TO MEDIUM TUESDAY AND WEDNESDAY...LOW TO MEDIUM WEDNESDAY NIGHT AND THURSDAY...MEDIUM FRIDAY AND SATURDAY...LOW && .MKX WATCHES/WARNINGS/ADVISORIES... WI...NONE. LM...NONE. && SHORT/LONG TERM...MBK AVIATION/MARINE...PC
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 323 PM CDT SAT JUL 10 2010 WIZ046-047-051-052-056>060-062>072-112030- MARQUETTE-GREEN LAKE-FOND DU LAC-SHEBOYGAN-SAUK-COLUMBIA-DODGE- WASHINGTON-OZAUKEE-IOWA-DANE-JEFFERSON-WAUKESHA-MILWAUKEE- LAFAYETTE-GREEN-ROCK-WALWORTH-RACINE-KENOSHA- 323 PM CDT SAT JUL 10 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL WISCONSIN...SOUTH CENTRAL WISCONSIN AND SOUTHEAST WISCONSIN. .DAY ONE...REST OF THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS WILL CONTINUE THE REST OF THE AFTERNOON...DIMINISHING EARLY THIS EVENING. SMALL HAIL AND WIND GUSTS TO 40 MPH MAY ACCOMPANY THE THUNDERSTORMS. THE STRONGEST THUNDERSTORMS MAY PRODUCE HAIL TO ONE INCH AND WIND GUSTS TO 60 MPH...MAINLY ALONG AND NORTH OF A LINE FROM REEDSBURG TO COLUMBUS TO WEST BEND AND SHEBOYGAN. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH SATURDAY THUNDERSTORMS ARE LIKELY SUNDAY EVENING AS A COLD FRONT AND VIGOROUS UPPER LEVEL DISTURBANCE PASSES ACROSS THE REGION. SCATTERED THUNDERSTORMS WILL DEVELOP LATER SUNDAY AFTERNOON... MAINLY OVER SOUTH CENTRAL WISCONSIN. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS WEST OF A BERLIN TO MADISON TO MONROE LINE LATE SUNDAY AFTERNOON INTO SUNDAY EVENING. LARGE HAIL AND DAMAGING WINDS MAY ACCOMPANY THE STRONGEST THUNDERSTORMS. THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY NIGHT AND THURSDAY AS A WEAK COLD FRONT APPROACHES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. LMZ643>646-112030- SHEBOYGAN TO PORT WASHINGTON WI- PORT WASHINGTON TO NORTH POINT LIGHT WI- NORTH POINT LIGHT TO WIND POINT WI- WIND POINT WI TO WINTHROP HARBOR IL- 323 PM CDT SAT JUL 10 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE MICHIGAN. .DAY ONE...TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED INTO THE EARLY EVENING. SOME THUNDERSTORMS MAY PRODUCE GUSTY WINDS IN EXCESS OF 33 KNOTS AND HAIL SO BE ALERT. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH SATURDAY A COLD FRONT WILL LIKELY BRING THUNDERSTORMS MAINLY SUNDAY NIGHT AND MONDAY. THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY NIGHT AND THURSDAY AS A WEAK COLD FRONT APPROACHES. WWW.WEATHER.GOV/MKX MBK
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 333 PM CDT SAT JUL 10 2010 WIZ047-051-058-059-102115- DODGE-FOND DU LAC-GREEN LAKE-WASHINGTON- 333 PM CDT SAT JUL 10 2010 ...STRONG THUNDERSTORM MOVING THROUGH FOND DU LAC AND DODGE COUNTIES... AT 329 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES EAST OF RIPON TO 7 MILES NORTH OF BEAVER DAM...MOVING EAST AT 15 MPH. PEA SIZE HAIL...WINDS UP TO 40 MPH...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THESE STORMS. * THUNDERSTORMS WILL BE NEAR... ROSENDALE BY 340 PM CDT... WAUPUN BY 345 PM CDT... JUNEAU DODGE AIRPORT BY 400 PM CDT... HORICON BY 410 PM CDT... OAKFIELD AND NORTH FOND DU LAC BY 415 PM CDT... GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED. ZABEL
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
336 PM CDT SAT JUL 10 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0330 PM TSTM WND GST BERLIN 43.97N 88.95W
07/10/2010 E50 MPH GREEN LAKE WI EMERGENCY MNGR
PEA SIZE HAIL IN ADDITION
&&
SEARSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
349 PM CDT SAT JUL 10 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0345 PM TSTM WND GST 1 S BERLIN 43.96N 88.95W
07/10/2010 E50 MPH GREEN LAKE WI LAW ENFORCEMENT
ALSO DIME SIZE HAIL
&&
ZABELPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
359 PM CDT SAT JUL 10 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0355 PM HAIL 2 NNE BURNETT 43.53N 88.69W
07/10/2010 E0.25 INCH DODGE WI LAW ENFORCEMENT
IN ADDITION...20 MPH WINDS. AT THE CORNER OF TOWER RD AND
HWY 26.
&&
SEARSSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 413 PM CDT SAT JUL 10 2010 WIZ052-058>060-102200- DODGE-OZAUKEE-SHEBOYGAN-WASHINGTON- 413 PM CDT SAT JUL 10 2010 ...STRONG THUNDERSTORM MOVING THROUGH DODGE AND WASHINGTON COUNTIES... AT 408 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM KEWASKUM TO 5 MILES NORTHWEST OF JUNEAU...MOVING SOUTHEAST AT 20 MPH. PEA SIZE HAIL...WINDS GREATER THAN 30 MPH...BRIEF HEAVY DOWNPOURS... ARE POSSIBLE WITH THESE STORMS. * THUNDERSTORMS WILL BE NEAR... JUNEAU DODGE AIRPORT BY 420 PM CDT... JUNEAU BY 425 PM CDT... NEWBURG AND WEST BEND BY 430 PM CDT... WEST BEND AIRPORT AND IRON RIDGE BY 435 PM CDT... HUSTISFORD BY 445 PM CDT... SLINGER AND HARTFORD BY 455 PM CDT... JACKSON BY 500 PM CDT... GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED. ZABEL
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 451 PM CDT SAT JUL 10 2010 WIZ046-047-051-052-057>059-102230- COLUMBIA-DODGE-FOND DU LAC-GREEN LAKE-MARQUETTE-SHEBOYGAN-WASHINGTON- 451 PM CDT SAT JUL 10 2010 ...STRONG THUNDERSTORM MOVING THROUGH GREEN LAKE...FOND DU LAC...DODGE AND WASHINGTON COUNTIES... AT 447 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LARGE AREA OF STRONG THUNDERSTORMS ACROSS GREEN LAKE AND FOND DU LAC COUNTIES AS WELL AS NORTHERN DODGE AND WASHINGTON COUNTIES. THESE STORMS WERE MOVING EAST AT 15 TO 20 MPH PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THESE STORMS. MINOR STREET FLOODING WILL ALSO BE POSSIBLE...ESPECIALLY IN GREEN LAKE AND FOND DU LAC COUNTIES WHERE STORMS CONTINUE TO DEVELOP OVER THE SAME AREAS. GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED. ZABEL
The Milwaukee radar (KMKX), 76 km away, was scanning. The volume nearest the first event began at 22:01 UTC.
1 thunderstorm wind, 1 hail. Local standard time, as filed.
Law enforcement reported power lines down on the Dodge County side of County Highway AW due to thunderstorm wind gusts.
The Muskego Police Department reported 3/4 inch hail fell in the city.
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: 249784, 249791.