Severe thunderstorms produced widespread wind damage with numerous reports of downed trees and power lines across far southern lower Michigan.
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.
Severe thunderstorms produced widespread wind damage with numerous reports of downed trees and power lines across far southern lower Michigan.
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 29, 12:22 PM EST, 2 hours 23 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND RAPIDS MI 122 PM EDT WED AUG 29 2007 LATEST UPDATE...LONG TERM... .SYNOPSIS...(404 AM EDT WED AUG 29 2007) A COLD FRONT WILL CUT ACROSS LOWER MICHIGAN TODAY. THIS FRONT WILL ARRIVE AROUND THE PEAK HEATING PORTION OF THE DAY. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP INTO THE EARLY AFTERNOON. SOME STORMS COULD BECOME SEVERE WITH STRONG DAMAGING WINDS AND LARGE HAIL. THE FRONT WILL EXIT THE REGION THIS EVENING BRINGING AN END TO THE THREAT OF STORMS. CANADIAN HIGH PRESSURE WILL MOVE INTO THE GREAT LAKES FOR THE END OF THE WORK WEEK LEADING TO FAIR WEATHER WITH COMFORTABLE TEMPERATURES. && .SHORT TERM... (404 AM EDT WED AUG 29 2007) A COLD FRONT THAT HAS BEEN RATHER ACTIVE THE LAST COUPLE OF DAYS WILL DROP ACROSS THE CWA TODAY. THE FRONT STRETCHED FROM THE SOO TO NEAR MSN THIS MORNING AND WILL ARRIVE ACROSS SW LOWER THIS AFTERNOON. IR IMAGES SHOW A RATHER SHARP EDGE TO THE CLOUD COVER FROM MKG TO APN...WITH NEARLY CLEAR SKIES AHEAD OF THE CLOUD EDGE. THIS WILL SET UP A SHARP DIFFERENTIAL HEATING REGION WHICH THE AFTERNOON CONVECTION SHOULD FORM ON. SE OF THIS LINE MLCAPE ARE PROGGED TO EXCEED 1000 JOULES...WITH OVER 2000 OVER THE FAR SE PORTION OF THE CWA TOWARD EVENING. GIVEN THIS...AND THE TIMING OF THE FRONT...AGREE WITH DAY ONE OUTLOOK FOR THE POTENTIAL FOR SEVERE STORMS. BELIEVE THESE WILL BE PULSE TYPE STORMS GIVEN THE LACK OF ANY LOW LEVEL JET...HOWEVER WITH DEEP LAYER SHEAR AROUND 30 KNOTS A FEW LINES SEGMENTS COULD FORM LEADING TO STRONG DAMAGING WINDS. THE SEVERE POTENTIAL WILL HOLD OFF UNTIL EARLY/MID AFTERNOON AS THE INSTABILITY BUILDS. THE FRONT AND STORMS WILL EXIT THE AREA THIS EVENING. THE SEVERE THREAT SHOULD BE LARGELY DIURNAL...AND WIND DOWN SHORTLY AFTER SUNSET. ALL PCPN WILL DIMINISH OR BE TO OUR SE BY 06Z WITH SKIES BEGINNING TO CLEAR FROM THE NW LATE TONIGHT. HIGH PRESSURE WILL BUILD INTO THE REGION FOR THURSDAY AND FRIDAY. MOSTLY CLEAR SKIES AND SEASONABLE TEMPS WILL RETURN. HIGH TEMPS WILL BE IN THE 75 TO 80 DEGREE RANGE WITH OVERNIGHT LOWS THURSDAY NIGHT DIPPING INTO THE 40S ACROSS THE INTERIOR NORTH...AND 50 TO 55 ELSEWHERE. && .LONG TERM... (122 PM EDT WED AUG 29 2007) UPPER RIDGE IS STILL EXPECTED TO BUILD OVER THE CENTRAL PORTION OF THE COUNTRY THROUGH THE FIRST HALF OF THE UPCOMING LABOR DAY WEEKEND. SFC RIDGING WILL OVERHEAD DURING THIS SAME TIME FRAME. DRY WEATHER ALONG WITH TEMPERATURES AROUND 80 ON SAT AND LOW TO MID 80S ON SUN CAN BE EXPECTED. AS THE UPPER RIDGE BREAKS DOWN TEMPORARILY...A WEAKENING COLD FRONT WILL MOVE DOWN INTO THE AREA DURING THE DAY ON MON. DEEP LAYER MOISTURE...UPPER ENERGY...AND LOW LEVEL CONVERGENCE WILL ALL BE LACKING WITH THIS FRONT. WITH THIS IN MIND...WE HAVE MAINTAINED THE DRY FORECAST FOR MON. THIS FRONT IS EXPECTED TO MOVE NORTH ON TUE...BUT THE STRONG MOISTURE ADVECTION WILL REMAIN WEST AND EVENTUALLY NORTH OF THE AREA. AS THE FRONT TRIES TO MOVES THROUGH ON WED...IT WILL ALSO WEAKEN WITH THE JET EXPECTED TO REMAIN NORTH OVER CANADA. && .AVIATION...(104 PM EDT WED AUG 29 2007) FRONT AS OF 17Z EXTENDED FROM NEAR KBEH...TO JUST SOUTH OF KGRR...TO NEAR SAGINAW BAY. THIS FRONT WILL SLOWLY MOVE SOUTH THIS AFTERNOON AND EARLY EVENING...CHANGING THE WINDS FROM SOUTHWEST AHEAD OF THE FRONT TO NORTH/NORTHWEST BEHIND IT. SCATTERED TO NUMEROUS CONVECTION IS EXPECTED TO FIRE ALONG AND JUST BEHIND THE FRONT BETWEEN 19Z AND 21Z. THE BEST POTENTIAL FOR STORMS WILL BE AT THE SOUTHEAST TERMINALS AND HAVE INSERTED A TEMPO GROUP THERE. KMKG SEEMS TO BE PRETTY MUCH OUT OF THE THREAT...SO HAVE ONLY INCLUDED A VCSH THERE WITH VCTS AT KGRR AND KAZO. STORM THREAT WILL END BY 00Z EVERYWHERE. AN AXIS OF LOW LEVEL MOISTURE IN THE WAKE OF THE FRONT IS CURRENTLY LOCATED ACROSS WI AND NORTHERN LOWER MICHIGAN. THIS MOISTURE IS EXPECTED TO DIMINISH A BIT THIS AFTERNOON WITH DIURNAL MIXING BEFORE IT MOVES OVERHEAD THIS EVENING. IT LOOKS LIKE IT WILL NOT BE A FACTOR TO THE NORTHWEST TERMINALS AS IT PASSES BY. IT DOES LOOK TO BECOME A FACTOR FOR THE SOUTHEAST TERMINALS AS IT WILL BE OVER THAT AREA OVERNIGHT WHEN THE MOISTURE WILL TEND TO REDEVELOP. WE HAVE INCLUDED A BIT OF MVFR STRATUS/STRATOCUMULUS FOR KBTL...KLAN...AND KJXN FOR THIS REASON OVERNIGHT. FOG SHOULD NOT BE MUCH OF A PROBLEM AS ENOUGH WIND SHOULD REMAIN UP. LOW LEVEL CLOUD COVER WILL THEN MIX OUT THURSDAY MORNING INTO A CUMULUS DECK. && .MARINE... (404 AM EDT WED AUG 29 2007) WINDS WILL BE RATHER LIGHT NEAR THE FRONT TODAY. WE WILL START OFF WITH SOUTHWEST WINDS THIS MORNING...SWINGING AROUND TO THE NORTH BY EVENING. WITH THE COLD ADVECTION AND LONG NORTHERLY FETCH PERSISTING TONIGHT WAVES COULD BUILD TO WITHIN THE SMALL CRAFT ADVISORY RANGE AT THE SOUTH END OF THE LAKE. THE WINDS ARE EXPECTED TO VEER TO THE NE ON THURSDAY WHICH SHOULD HELP LOWER WAVES HEIGHTS. && .HYDROLOGY... (404 AM EDT WED AUG 29 2007) THE OVERALL BASIN AVERAGE RAINFALL SHOULD BE UNDER A HALF INCH ACROSS THE CWA WITH THE PASSAGE OF THE COLD FRONT. HOWEVER THERE COULD BE SOME LOCALIZED HEAVY RAIN. PRECIPITABLE WATER VALUES APPROACHES TWO INCHES LATE THIS AFTERNOON AND EARLY THIS EVENING. ALSO...WITH A RATHER SLOW MOVING FRONT SOME TRAINING ECHOES WILL BE POSSIBLE. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...NONE. LM...NONE. && SYNOPSIS: JK SHORT TERM: JK LONG TERM: NJJ AVIATION: NJJ MARINE: JK HYDROLOGY: JK
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 1145 AM EDT WED AUG 29 2007 MIZ037>040-043>046-050>052-056>059-064>067-071>074-300930- MASON-LAKE-OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON- MONTCALM-GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON- INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON- 1145 AM EDT WED AUG 29 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...THIS AFTERNOON AND TONIGHT A SLIGHT RISK OF SEVERE THUNDERSTORMS EXISTS EAST OF A LINE FROM MUSKEGON TO HARRISON THIS AFTERNOON AND EVENING. THE BEST TIME FOR SEVERE WEATHER WILL BE BETWEEN 2 PM AND 8 PM. A FEW THUNDERSTORMS COULD BRIEFLY REACH SEVERE LEVELS WITH DAMAGING WINDS TO 60 MPH AND HAIL THE SIZE OF PENNIES. THE MAIN STORM MOTION WILL BE NORTHEAST AT 25 MPH. ANY OF THE STRONGER THUNDERSTORMS COULD PRODUCE FREQUENT LIGHTNING AND A HALF INCH OF RAINFALL. TRIGGERING THE THUNDERSTORMS WILL BE A COLD FRONT WHICH EXTENDED FROM THE SAGINAW BAY TO NEAR MUSKEGON AT 1130 AM. THE FRONT WILL CONTINUE MOVING SOUTHEAST AND BE OUT OF THE AREA BEFORE MIDNIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON OR EVENING. LMZ844>849-300930- ST JOSEPH TO SOUTH HAVEN-SOUTH HAVEN TO HOLLAND- HOLLAND TO GRAND HAVEN-GRAND HAVEN TO WHITEHALL- WHITEHALL TO PENTWATER-PENTWATER TO MANISTEE- 1145 AM EDT WED AUG 29 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON AND EVENING. BRIEF WIND GUSTS OVER 35 KNOTS ALONG WITH FREQUENT LIGHTNING COULD ACCOMPANY THE STRONGER THUNDERSTORMS. WAVES WILL BE BUILDING LATER TODAY AND TONIGHT...AND CONDITIONS COULD BECOME HAZARDOUS TO SMALL CRAFT. RIP CURRENTS WILL ALSO BE POSSIBLE. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY HAZARDOUS CONDITIONS FOR SMALL CRAFT MAY PERSIST INTO THURSDAY. MJS MEADE
The Grand Rapids radar (KGRR), 87 km away, was scanning. The volume nearest the first event began at 19:46 UTC.
11 thunderstorm wind. Local standard time, as filed.
Numerous trees were blown down across Clinton county.
A tree took wires down east of the Wilson and Blair roads intersection.
Several trees were blown down in and near St. John's and Eureka.
Several trees were blown down and blocked area roads in Sonoma and Athens as well as two miles north of Burlington.
Two trees were blown down and blocked a road in Ovid.
Two trees were blown down east southeast of Marshall which blocked roads in that area.
Several trees were blown down in Springport. A couple of trees were also blown down near Jackson.
Several trees were blown down onto power lines in Leslie, and large tree branches were blown down onto cars in East Lansing.
Two trees were blown down in Springport.
Several trees were blown down in Bellevue where wind gusts were estimated at 50 to 60 mph.
Several trees and power lines were blown down along Highway 99.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2007Every state in 2007This day in weather historyWarnings 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: 56799, 56800, 56801, 56802, 56804, 56806, 56807, 56808, 56809, 56810, 56811.