A line of thunderstorms moved out over Lake Michigan and generated strong wind gusts.
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 line of thunderstorms moved out over Lake Michigan and generated strong wind gusts.
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 Aug 27, 2:25 AM CST, 10 hours earlier.
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</html>PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
121 PM CDT MON AUG 27 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1136 AM NON-TSTM WND GST MADISON 43.08N 89.39W
08/27/2007 M40.00 MPH DANE WI ASOS
MEASURED AT MADISON TRUAX FIELD.
1147 AM NON-TSTM WND GST MADISON 43.08N 89.39W
08/27/2007 M58.00 MPH DANE WI MESONET
NUMEROUS TREES AND POWER LINES DOWN IN THE CITY OF
MADISON AS REPORTED BY LAW ENFORCEMENT. MEASURED 58 MPH
GUST AT UW-MADISON ON THE TOP OF THE 15 STORY METEOROLOGY
BUILDING.
1153 AM NON-TSTM WND GST MADISON 43.08N 89.39W
08/27/2007 M39.00 MPH DANE WI MESONET
1200 PM NON-TSTM WND GST WATERLOO 43.18N 88.99W
08/27/2007 M39.00 MPH JEFFERSON WI MESONET
MEASURED AT WATERLOO SCHOOL DISTRICT. TIME ESTIMATED.
1200 PM NON-TSTM WND GST DODGEVILLE 42.96N 90.13W
08/27/2007 M37.00 MPH IOWA WI MESONET
MEASURED AT KROMREY MIDDLE SCHOOL. TIME ESTIMATED.
1200 PM NON-TSTM WND GST REEDSBURG 43.53N 90.00W
08/27/2007 M39.00 MPH SAUK WI MESONET
TIME ESTIMATED.
1200 PM NON-TSTM WND GST MIDDLETON 43.10N 89.51W
08/27/2007 M37.00 MPH DANE WI MESONET
TIME ESTIMATED.
1201 PM NON-TSTM WND GST HORICON 43.44N 88.64W
08/27/2007 M41.00 MPH DODGE WI MESONET
1210 PM NON-TSTM WND GST LODI 43.32N 89.53W
08/27/2007 M49.00 MPH COLUMBIA WI MESONET
MEASURED AT LODI MIDDLE SCHOOL. TIME ESTIMATED.
1225 PM NON-TSTM WND GST WEST BEND 43.42N 88.18W
08/27/2007 M41.00 MPH WASHINGTON WI AWOS
MEASURED AT WEST BEND MUNICIPAL AIRPORT.
1225 PM NON-TSTM WND GST WEST BEND 43.42N 88.18W
08/27/2007 M41.00 MPH WASHINGTON WI MESONET
1230 PM NON-TSTM WND GST WAUPUN 43.63N 88.74W
08/27/2007 M36.00 MPH DODGE WI MESONET
TIME ESTIMATED.
1236 PM NON-TSTM WND GST WATERTOWN 43.19N 88.72W
08/27/2007 M41.00 MPH JEFFERSON WI MESONET
1245 PM NON-TSTM WND GST RICHFIELD 43.26N 88.19W
08/27/2007 M42.00 MPH WASHINGTON WI MESONET
MEASURED AT RICHFIELD MIDDLE SCHOOL. TIME ESTIMATED.
1245 PM NON-TSTM WND GST GERMANTOWN 43.24N 88.12W
08/27/2007 M46.00 MPH WASHINGTON WI MESONET
MEASURED AT KENNEDY MIDDLE SCHOOL. TIME ESTIMATED.
1245 PM NON-TSTM WND GST SLINGER 43.33N 88.29W
08/27/2007 M46.00 MPH WASHINGTON WI MESONET
MEASURED AT SLINGER MIDDLE SCHOOL. TIME ESTIMATED.
1250 PM NON-TSTM WND GST DOUSMAN 43.01N 88.47W
08/27/2007 M45.00 MPH WAUKESHA WI MESONET
MEASURED AT KETTLE MORAINE MIDDLE SCHOOL. TIME ESTIMATED.
1250 PM NON-TSTM WND GST COLUMBUS 43.34N 89.03W
08/27/2007 M39.00 MPH COLUMBIA WI MESONET
TIME ESTIMATED.
1250 PM NON-TSTM WND GST GRAFTON 43.32N 87.95W
08/27/2007 M37.00 MPH OZAUKEE WI MESONET
MEASURED AT GRAFTON MIDDLE SCHOOL. TIME ESTIMATED.
1250 PM NON-TSTM WND GST JACKSON 43.32N 88.16W
08/27/2007 M42.00 MPH WASHINGTON WI MESONET
TIME ESTIMATED.
1250 PM NON-TSTM WND GST HARTFORD 43.32N 88.39W
08/27/2007 M39.00 MPH WASHINGTON WI MESONET
TIME ESTIMATED.
0100 PM NON-TSTM WND GST PALMYRA 42.88N 88.59W
08/27/2007 M38.00 MPH JEFFERSON WI MESONET
MEASURED AT PALMYRA EAGLE MIDDLE SCHOOL. TIME ESTIMATED.
0100 PM NON-TSTM WND GST OCONOMOWOC 43.10N 88.50W
08/27/2007 M36.00 MPH WAUKESHA WI MESONET
TIME ESTIMATED.
&&
BORGHOFFThe Milwaukee radar (KMKX), 51 km away, was scanning. The volume nearest the first event began at 18:26 UTC.
3 marine thunderstorm wind. Local standard time, as filed.
A thunderstorm wind gust of 36 knots (41 mph) was measured near the Milwaukee harbor.
An estimated thunderstorm wind gust of 36 knots (41 mph) occurred near the Milwaukee harbor.
A thunderstorm wind gust of 37 knots (43 mph) was measured near the Kenosha harbor.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Lake Michigan in 2007Every state in 2007This day in weather history
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 2026-10-01. Each event’s entry at NCEI: 57527, 57529, 57530.