A weak cold front moved southeast through southern Wisconsin and several thunderstorms along the front became severe. Large hail up to 1 inch in diameter and powerful wind gusts to around 52 knots (60 mph) were produced.
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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 MKX wrote it up.
A weak cold front moved southeast through southern Wisconsin and several thunderstorms along the front became severe. Large hail up to 1 inch in diameter and powerful wind gusts to around 52 knots (60 mph) were produced. Dewpoints in the upper 60s to lower 70s resulted in CAPE values of 1500-2000, which was sufficient for severe storm development.
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 8, 1:56 PM CST, 12 hours 19 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 256 PM CDT SUN JUL 8 2007 .DISCUSSION...FORECAST FOCUS ON PRECIPITATION CHANCES FOR EARLY IN WEEK. .VERY SHORT TERM...POOLING OF 70 DEGREE DEW POINTS ADVECTING OVER CWA FROM EASTERN IOWA LATE THIS AFTERNOON WILL COMBINE WITH TEMPERATURES IN THE 90S TO KEEP HEAT INDEX VALUES IN THE 90S TO AROUND 100 EARLY THIS EVENING. .SHORT TERM...700 MILLIBAR TEMPERATURES AT OR ABOVE 10C FIRMLY ESTABLISHED OVER CWA GIVES CONFIDENCE TO RETARD ONSET OF CONVECTION FOR SEVERAL HOURS THIS EVENING ACROSS CWA. WRF/NGM/GFS/NAM/RUC PROGS IN GOOD AGREEMENT WITH COLD FRONT SAGGING SLOWLY SWD ACROSS THE STATE TONIGHT. TREND OF PROGS QPF SHOWS BULK OF CONVECTION EXPECTED OVER NORTHERN SECTIONS OF THE CWA WITH SOUTH GETTING LITTLE IF ANY PRECIPITATION BY 12Z MONDAY. THERE STILL EXISTS SOME POTENTIAL FOR ISOLATED STRONG STORMS GIVEN MODERATE INSTABILITY...STEEP MID LEVEL LAPSE RATES...AND EFFECTIVE SHEAR VALUES AOA 35 KNOTS. .LONG TERM...PROGS IN VERY CLOSE AGREEMENT WITH HANGING UP OF FRONTAL BOUNDARY JUST SOUTH OF CWA MONDAY. SHALLOW NATURE OF FRONT PROVIDES FOCUS FOR CHANCY CONVECTION MONDAY THROUGH TUESDAY. AIRMASS WILL BE MOIST WITH PRECIPITABLE WATER VALUES AROUND 2 INCHES...SO POTENTIAL FOR HEAVY RAIN INCREASES. DECENT THETA E RIDGE LIES OVER CWA THROUGHOUT THIS TIME PERIOD. CRAS SATELLITE LOOP SHOWS SEVERAL COLD CLOUD CONVECTIVE CLUSTERS OVER CWA FORMING OVER REGION IN WEAK MIDDLE AND UPPER LEVEL FLOW. NAM/GFS PROGS BRING VERY IMPRESSIVE COLD FRONT ACROSS CWA TUESDAY EVENING. POTENTIAL EXISTS FOR STRONG TO SEVERE WEATHER WITH THIS FRONT ALTHOUGH DYNAMICS REMAIN NORTH OF AREA. .LONG LONG TERM..GFS/ECMWF PROGS BOTH DEVELOP LARGE UPPER LOW CENTERED JUST WEST OF JAMES BAY CANADA. THIS PUTS CWA IN A COOL NORTHWEST FLOW FROM WEDNESDAY INTO NEXT WEEKEND. && .AVIATION...COLD FRONT MOVING SWD ACROSS MN AND NW WI SUN AFTERNOON WILL SLOWLY MOVE SWD THROUGH SRN WI STARTING AT 03Z BUT BECOMING STATIONARY ALONG THE WI/IL BORDER MON AFTERNOON. SCT SHOWERS AND TSTORMS WILL OCCUR AT TIMES WITH THE FRONT TNT AND MON. OTHERWISE MOSTLY VFR CONDITIONS...BUT LIGHT WINDS ALONG FRONTAL BOUNDARY AND MOIST AIRMASS MAY LEAD TO LOCAL MVFR HAZE AND/OR FOG LATE TNT AND EARLY MONDAY. && .MKX WATCHES/WARNINGS/ADVISORIES... NONE. && ZAJDEL/20
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1015 PM CDT SUN JUL 8 2007 WIZ046-047-051-052-056>060-062>072-091000- MARQUETTE-GREEN LAKE-FOND DU LAC-SHEBOYGAN-SAUK-COLUMBIA-DODGE- WASHINGTON-OZAUKEE-IOWA-DANE-JEFFERSON-WAUKESHA-MILWAUKEE- LAFAYETTE-GREEN-ROCK-WALWORTH-RACINE-KENOSHA- 1015 PM CDT SUN JUL 8 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL WISCONSIN...SOUTH CENTRAL WISCONSIN AND SOUTHEAST WISCONSIN. .DAY ONE...TONIGHT THERE IS A CHANCE OF THUNDERSTORMS TONIGHT AS A COLD FRONT SLOWLY MOVES SOUTH THROUGH SOUTHERN WISCONSIN. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THERE IS A CHANCE FOR THUNDERSTORMS MONDAY THROUGH WEDNESDAY MORNING. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS LATE TUESDAY AHEAD OF AN ADVANCING COLD FRONT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. LMZ643>646-665-091000- SHEBOYGAN TO PORT WASHINGTON- PORT WASHINGTON TO NORTH POINT LIGHTHOUSE- NORTH POINT LIGHTHOUSE TO WIND POINT- WIND POINT TO WINTHROP HARBOR ILLINOIS- WISCONSIN ADJACENT OPEN WATERS OF LAKE MICHIGAN TO MID LAKE- 1015 PM CDT SUN JUL 8 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE MICHIGAN. .DAY ONE...TONIGHT THERE IS A CHANCE OF THUNDERSTORMS TONIGHT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THERE IS A CHANCE FOR THUNDERSTORMS MONDAY THROUGH WEDNESDAY MORNING. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS LATE TUESDAY AHEAD OF AN ADVANCING COLD FRONT. HENTZ WWW.WEATHER.GOV/MKX
The Milwaukee radar (KMKX), 56 km away, was scanning. The volume nearest the first event began at 08:15 UTC.
8 hail, 5 thunderstorm wind, 1 lightning. Local standard time, as filed.
Lightning struck a barn on Morris Rd., resulting in a fire that destroyed the structure, as well as a 1994 vehicle parked inside. An adjacent small shed also had a small fire that was quickly extinguished.
Powerful thunderstorm wind gusts to around 52 knots (60 mph) toppled several large trees.
Powerful thunderstorm wind gusts to around 52 knots (60 mph) toppled several large trees.
Powerful thunderstorm winds toppled several large trees.
Thunderstorm wind gusts to about 39 knots (45 mph) also noted.
Powerful thunderstorm gusts to around 52 knots (60 mph) toppled large trees and tree branches. The tree debris damage a home's porch and garage, and a car and boat.
Powerful thunderstorm winds toppled many trees. The hardest-hit area in the city of Kenosha was centered around 30th Ave. and 75th St. where a church steeple was knocked over by the winds. At least 4 vehicles were damaged by tree debris. Additionally, minor urban-type flooding (water up to the curb) occurred for about 30 minutes on some roads in the city of Kenosha. The gust was measured at the Kenosha Airport ASOS site, although a higher gust was possible where the church steeple was toppled. About a dozen power-lines came down on the south side of the city of Kenosha due to tree debris, leaving about 3600 customers without power.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2007Every state in 2007This day in weather historyWarnings in Wisconsin, July 2007
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: 50064, 50049, 50052, 50050, 50053, 50055, 50056, 50058, 50057, 50059, 50060, 50061, 50067, 50062.