An EF-3 tornado struck Eaton county and resulted in five injuries but no fatalities. An EF-1 tornado struck Ingham county but did not produce any injuries or fatalities.
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 GRR wrote it up.
An EF-3 tornado struck Eaton county and resulted in five injuries but no fatalities. An EF-1 tornado struck Ingham county but did not produce any injuries or fatalities.
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 Grand Rapids, MI wrote its last area forecast discussion before the first event at Aug 24, 2:23 PM EST, 44 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND RAPIDS MI 323 PM EDT FRI AUG 24 2007 LATEST UPDATE...LONG TERM AND AVIATION... .SYNOPSIS...(345 AM EDT FRI AUG 24 2007) STRONG TO SEVERE THUNDERSTORMS MAY REDEVELOP THIS AFTERNOON AND ESPECIALLY FOR TONIGHT AS INTENSIFYING LOW PRESSURE MOVES NORTHEAST ALONG THE COLD FRONT COMING THROUGH OUR AREA. DAMAGING WIND GUSTS WILL BE THE PRIMARY SEVERE WEATHER THREAT. AN ISOLATED TORNADO CANNOT BE RULED OUT THIS AFTERNOON AND EVENING. HIGH PRESSURE WILL BUILD IN THIS WEEKEND ALLOWING FOR TRANQUIL WEATHER TO FINALLY RETURN TO OUR AREA. && .SHORT TERM... (1239 PM EDT FRI AUG 24 2007) CONVECTIVE MORPHOLOGY QUITE A BIT MORE MUDDY AS COMPARED TO YESTERDAY. FEATURE OF NOTE AT THE SURFACE IS A QUASI STATIONARY BOUNDARY EXTENDING FROM FAR NORTHERN LOWER MICHIGAN SOUTHWEST INTO IOWA. SOUTH OF THIS BOUNDARY OUTFLOW BOUNDARIES FROM STORMS OF THE LAST 24 HOURS HAVE PROPAGATED WELL SOUTH INTO MISSOURI...SOUTHERN ILLINOIS AND CENTRAL INDIANA. QUITE A BIT OF CLOUD COVER LIES BETWEEN THESE TWO SURFACE FEATURES...INCLUDING OVER SOUTHERN LOWER MICHIGAN. ALOFT...MAIN FEATURE TO KEY ON IS SHORTWAVE HEADING OUT OF KANSAS INTO MISSOURI. THIS FEATURE HAS STORMS ASSOCIATED WITH IT IN CENTRAL AND SOUTHERN MISSOURI AT THIS TIME. THIS SHORTWAVE ALOFT IS EXPECTED TO MOVE NORTHEAST AND BE IN NORTHERN INDIANA/SOUTHWEST LOWER MICHIGAN THIS EVENING. FEEL THAT WE HAVE A CHANCE FOR STORMS THIS AFTERNOON GIVEN MANY WEAK IMPULSES IN THE FLOW. BUILDING INSTABILITY IS TAKING PLACE ALTHOUGH IT IS NO WHERE NEAR AS GREAT AS YESTERDAY AFTERNOON. THE CLOUD COVER IS HINDERING THIS AND MAY CONTINUE TO DO SO THROUGH THE AFTERNOON. SO...SMALL CLUSTERS OF STORMS MAY BE POSSIBLE THROUGH THE AFTERNOON. FEEL THE MAIN SHOW IN THE NEXT 12 HOURS THOUGH WILL LIKELY BE ASSOCIATED WITH THE STORMS MOVING NORTHEAST OUT OF MISSOURI. FEEL THIS WILL PROBABLY CONGEAL INTO A LINE AND MOVE ACROSS ILLINOIS INTO NORTHERN INDIANA AND POTENTIALLY INTO SOUTHERN LOWER MICHIGAN. BEST CHANCES FOR STORMS AND SEVERE ARE IN THE MODERATE RISK AREA...WHICH IN OUR AREA WILL BE SOUTH OF A LINE FROM SAUGATUCK TO LANSING ROUGHLY. STRONG WINDS REMAIN THE PRIMARY THREAT...BUT HEAVY RAIN AND AN ISOLATED TORNADO CANNOT BE RULE OUT EITHER GIVEN LARGE SHEAR VALUES IN THE 0-6KM LAYER...IN EXCESS OF 40 KTS. FEEL THIS LINE OF STORMS WILL BE LATER INTO THE EVENING AS COMPARED TO LAST NIGHT...PROBABLY MORE TOWARD 900 PM IF IT EVOLVES AS THOUGHT. COOLER AND DRIER AIR WILL FINALLY FILTER IN BEHIND THE COLD FRONT FOR THE WEEKEND AS HIGH PRESSURE BUILDS IN. && .LONG TERM... (323 PM EDT FRI AUG 24 2007) A RELATIVELY QUIET PERIOD IS EXPECTED. HIGH PRESSURE OVER THE GREAT LAKES WILL SLOWLY MOVE EAST MONDAY AND ALLOW THE NEXT COLD FRONT TO DROP SOUTH TUESDAY NIGHT AND WEDNESDAY. WE/LL CONTINUE WITH THE TSRA DURING THAT TIME FRAME WITH DRY AND MUCH COOLER WX AFTER. H8 TEMPS FALL TO AROUND +4C BY THE END OF THE WEEK. THAT SHOULD RESULT IN HIGHS MAINLY IN THE 60S BY FRIDAY. && .AVIATION...(323 PM EDT FRI AUG 24 2007 ) SHOWERS AND THUNDERSTORMS ARE IN THE FORECAST FOR THE NEXT 18 HRS OR SO. SOME OF THE STORMS MAY TAKE VISIBILITIES DOWN TO A MILE OR SO...BUT MAINLY FOR THE SRN TAF SITES. IMPROVING CONDTIONS WILL ARRIVE SAT MORNING AFTER THE COLD FRONT MOVES THROUGH WHEN DRIER AIR MOVES IN. && .MARINE... (345 AM EDT FRI AUG 24 2007) SMALL CRAFT ADVISORY WHICH WAS IN EFFECT FOR THE NEARSHORE WATERS OF LAKE MI FROM HOLLAND TO MANISTEE HAS BEEN CANCELLED EARLY. STORMS WILL LOCALLY INCREASE WIND AND WAVES TODAY AND TONIGHT AND POSE A SIGNIFICANT THREAT TO MARINERS. && .HYDROLOGY... (345 AM EDT FRI AUG 24 2007) AREA RIVERS REMAIN HIGHER THAN NORMAL BUT ARE GENERALLY WELL BELOW FLOOD STAGE. ADDITIONAL HEAVY RAIN IS EXPECTED THIS AFTERNOON AND ESPECIALLY TONIGHT. PRECIPITABLE WATER VALUES REMAIN IN EXCESS OF 2.00 INCHES INTO FRIDAY NIGHT SO STORMS SHOULD BE EFFICIENT HEAVY RAIN PRODUCERS. WILL NEED TO MONITOR RAINFALL AND RIVER LEVELS FOR POTENTIAL HYDRO ISSUES VERY CLOSELY LATER THIS AFTERNOON AND TONIGHT. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...NONE. LM...NONE. && SYNOPSIS: LAURENS/DUKE SHORT TERM: DUKE LONG TERM: OSTUNO AVIATION: OSTUNO MARINE: LAURENS HYDROLOGY: LAURENS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 155 PM EDT FRI AUG 24 2007 LMZ844>849-MIZ037>040-043>046-050>052-056>059-064>067-071>074-251015- ST JOSEPH TO SOUTH HAVEN-SOUTH HAVEN TO HOLLAND- HOLLAND TO GRAND HAVEN-GRAND HAVEN TO WHITEHALL- WHITEHALL TO PENTWATER-PENTWATER TO MANISTEE-MASON-LAKE-OSCEOLA- CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON-MONTCALM-GRATIOT- OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON-INGHAM-VAN BUREN- KALAMAZOO-CALHOUN-JACKSON- 155 PM EDT FRI AUG 24 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON...SOME OF WHICH MAY BE SEVERE...WITH DAMAGING WINDS AND HEAVY RAIN BEING THE MAIN THREATS. A MORE CONCENTRATED AREA OF SEVERE WEATHER IS POSSIBLE ACROSS SOUTHERN LOWER MICHIGAN THIS EVENING AS STORMS MOVE INTO THE AREA FROM THE SOUTHWEST. AREAS ALONG AND SOUTH OF A LINE FROM MUSKEGON TO MOUNT PLEASANT HAVE A THREAT FOR SEVERE STORMS...WITH THE INTERSTATE 94 CORRIDOR MOST AT RISK. DAMAGING WINDS AGAIN WILL BE THE MAIN THREAT WITH WIND GUSTS TO 60 MPH POSSIBLE. ISOLATED LARGE HAIL AND EVEN A TORNADO ARE POSSIBLE...BUT THE STRONG WIND THREAT WILL BE THE MAIN ISSUE. THUNDERSTORM MOVEMENT WILL BE TO THE NORTHEAST AT 30 TO 40 MPH. AS THUNDERSTORMS CONTINUE TO MOVE OVER THE SAME AREAS LOCALIZED FLOODING AND PONDING OF WATER IS A DISTINCT POSSIBILITY BOTH THIS AFTERNOON AND TONIGHT. SOME LOCATIONS WILL LIKELY SEE OVER AN INCH OF RAIN...WITH ISOLATED REPORTS IN EXCESS OF TWO INCHES POSSIBLE. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THUNDERSTORMS ARE POSSIBLE ALONG A COLD FRONT ON TUESDAY AFTERNOON AND INTO WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON OR EVENING. OSTUNO DUKE
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 357 PM EDT FRI AUG 24 2007 MIZ058-059-065>067-242100- BARRY-CLINTON-EATON-INGHAM-IONIA- 357 PM EDT FRI AUG 24 2007 ...SPECIAL WEATHER STATEMENT... AT 354 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 13 MILES NORTH OF PORTLAND TO 15 MILES WEST OF CHARLOTTE...MOVING EAST AT 35 MPH. WINDS GREATER THAN 40 MPH...FREQUENT CLOUD TO GROUND LIGHTNING...ARE POSSIBLE WITH THESE STORMS. LOCATIONS IN OR NEAR THE PATH INCLUDE...GRAND LEDGE...CHARLOTTE...ST. JOHNS...POTTERVILLE...EDGEMONT PARK...DEWITT...ELSIE AND LANSING. 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 THESE STORMS HAVE PASSED. LAT...LON 4313 8478 4247 8516 4246 8454 4312 8435 93
The Grand Rapids radar (KGRR), 54 km away, was scanning. The volume nearest the first event began at 20:07 UTC.
2 tornado, 1 thunderstorm wind. Local standard time, as filed.
Trees and limbs were blown down near the intersection of Carlisle and Mason roads and a chimney was blown down.
A NWS storm survey team determined that an EF-3 (Enhanced-Fujita Tornado Scale Rating) tornado with wind speeds estimated at 140 mph produced the most severe damage along a path from M-50 just north of Kinsel Highway to just west of M-100 and Vermontville Highway near Potterville, Michigan. The storm survey indicated a tornado path which was 200 to 300 yards wide and 6.5 miles long.
Fifteen homes were either destroyed or severely damaged. A roof was blown off a single story home and windward facing walls were blown in. The majority of the roof and garage from this home were not found. A roof was blown off of a two story home and the upper story front walls were blown in. Additional damage included the partial collapse of the upper story of a home, and another house was blown off of the foundation. Two barns were destroyed and another incurred heavy damage just west of Potterville.
An EF-1 tornado struck Ingham county south and east of the city of Lansing. Maximum winds were estimated at 90 mph. The track of the tornado was six miles long and 200 to 300 yards wide.
The first sign of damage was near the intersections of Waverly and M-99. Significant damage occurred at the Stonegate mobile home park south of M-99. Many trees were down there and some fell on mobile homes. The damage path continued northeast toward I-96 across Grovenburg Road.
More tree damage was found on the north side of I-96 along Haag Road. The damage path continued northeast across Miller Road through neighborhoods where numerous oak trees were blown down, some onto homes.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2007Every state in 2007This day in weather historyThe tornado archive for Michigan, 2007Warnings in Michigan, August 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: 56788, 56789, 56791.