10 hail, 1 thunderstorm wind, as filed by the National Weather Service.
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 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 3, 10:00 AM EST, 2 hours 56 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND RAPIDS MI 1100 AM EDT SUN AUG 03 2003 ...WILL LOWER POP THIS AFTERNOON TO SCATTERED... THE PRIMARY PROBLEM IS WHAT TO DO WITH THE POP THIS AFTERNOON. CURRENTLY THERE IS AN SIX TENTHS AREA OF SHOWERS AND SCATTERED THUNDERSTORMS THAT EXTEND FROM THE WESTERN UPPER PENINSULA OF MICHIGAN ACROSS NORTHERN LOWER MICHIGAN...THEN SOUTH SOUTHEAST TOWARD THE NORTHWEST OHIO. THIS AREA IS LIFTING SLOWLY NORTH AND IS ASSOCIATED WITH BOTH THE JET EXIT REGION LIFT (UPPER MI/NRN LWR) AND A SHORTWAVE THAT SHOWS UP WELL ON THE WATER VAPOR LOOPS FROM WI INTO LOWER MICHIGAN. THERE IS THE CLASSIC DRY SLOT POKING INTO SOUTHWEST LOWER MICHIGAN. ALSO... THERE IS A QUASI-COLD FRONT (DRY LINE MORE SO) FROM THE SURFACE LOW NEAR MKE TO NEAR STL. MEANWHILE THERE WAS ALMOST NO ECHOS IN THE GRR CWA (OK...THERE ARE SOME OVER OUR N AND ERN CWA). SO...WHAT WILL HAPPEN? MY GUESS IS THE PRIMARY WARM ADVECTION LIFT (1000/925/850 WARM ADVECTION AND 700 MB ISENTROPIC LIFT) PLUS THE DEEP MOISTURE CONVERGENCE (1000/850 THTE CONVERGENCE AND 850 DEW POINT AXIS) ARE MOSTLY ALREADY EAST OF THE GRR CWA. EVEN SO...THERE IS A GOOD DEAL OF HIGH AND MID CLOUDS ASSOCIATED WITH WARM ADVECTION PATTERN TO OUR EAST THAT IS STILL OVER MOST OF THE CWA. THAT WILL LIMIT THE INSTABILITY SOME. THE SW CORNER OF THE CWA HAS THE BEST CHANCE OF DECENT THUNDERSTORMS SINCE THAT COLD FRONT OF SORTS WILL BE MOVING SLOWLY INTO THE CWA THERE AND THAT AREA WILL HAVE THE GREATEST AMOUNT OF SUNSHINE. RUC SOUNDINGS SUGGEST 2500 J/KG POSSIBLE SOUTH AND WEST OF GRR BY 21Z. EVEN SO... THE ETA AND RUC SUGGEST SW LWR IS IN A AREA OF UPPER CONVERGENCE (NOT GOOD FOR LIFT). THE REST OF THE AREA WILL LIKELY NOT DESTABILIZE ENOUGH AND THE PRECIPITATION WITH THE WARM CONVEYOR BELT WILL BE EAST OF THE CWA. THUS I WILL LOWER THE CHANCE OF PRECIPITATION TO SCT FOR ALL AREAS THIS AFTERNOON. TONIGHT THE CONVECTION SHOULD END TOTALLY BY MIDNIGHT OR SO (SURFACE HEATING GONE AND LITTLE DYNAMIC REASON TO KEEP IT GOING). THERE IS A SMALL RISK OF ISOLATED SEVERE THUNDERSTORMS OVER THE SW PART OF THE CWA THIS AFTERNOON DUE TO THE CAPES NEAR 2500 J/K AND FREEZING LEVEL NEAR 11,500 FT. SO HAIL WOULD BE THE MOST LIKELY TYPE OF HAZARD. OF COURSE WIND IS POSSIBLE TOO BE THE WIND PROFILE SURE DOES NOT SUPPORT ANY MAJOR SEVERE THREAT BY ITSELF DUE TO THE LACK OF VERTICAL SHEAR AND ANY WIND OVER 25 KNOTS BELOW 20,000 FT. ZONES BY 1115 AM. .GRR...NONE. WDM
MIZ037>040-043>046-050>052-056>059-064>067-071>074-041000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 638 AM EDT SUN AUG 3 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE SOUTHWEST QUARTER OF LOWER MICHIGAN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL ONCE AGAIN BE POSSIBLE TODAY ACROSS ALL OF THE SOUTHWEST QUARTER OF LOWER MICHIGAN. A FEW OF THESE STORMS MAY APPROACH SEVERE LEVELS. MOST STORMS WILL BE CAPABLE OF PRODUCING HEAVY RAIN...CLOUD TO GROUND LIGHTNING STRIKES AND GUSTY WINDS TO 30 MPH. THE STRONGEST OF STORMS COULD PRODUCE HAIL TO AROUND THREE QUARTERS OF AN INCH AND WINDS TO NEAR 60 MPH. THE UNSTABLE CONDITIONS THAT HAVE BEEN IN PLACE THE LAST COUPLE DAYS WILL PERSIST ONCE AGAIN. STORMS WILL BE POSSIBLE ANY TIME TODAY AND TONIGHT...WITH THE HIGHEST LIKELIHOOD BEING THIS AFTERNOON AND EVENING. THUNDERSTORM MOVEMENT WILL BE TO THE NORTH AT 20 MPH. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORMS REMAIN IN THE FORECAST FROM MONDAY THROUGH WEDNESDAY. A FEW STRONG STORMS WILL BE POSSIBLE AGAIN ON MONDAY. LATER STATEMENTS WILL DETAIL ANY THREATS FROM STORMS ON MONDAY...BUT WIDESPREAD SEVERE WEATHER IN NOT ANTICIPATED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY. RJD
The Grand Rapids radar (KGRR), 55 km away, was scanning. The volume nearest the first event began at 17:54 UTC.
10 hail, 1 thunderstorm wind. Local standard time, as filed.
Three quarters inch diameter hail was reported in Fruitport.
A report of three quarters inch hail was also received from Whitehall.
Three quarters inch hail was reported two miles southwest of the city of Allegan.
One and three quarters inch diameter hail was reported in Grand Junction.
Hail three quarters inch in diameter was reported four miles south of Fennville.
One inch diameter hail was reported in Gobles.
Three quarters inch hail was reported between 36th and 106th streets, in Allegan.
One and three quarters inch diameter hail was reported in Muskegon township, and three quarters inch diameter hail was reported in Lakewood Club.
Six inch diameter tree limbs were blown down at the intersection of M-82 and Evergreen, in Newaygo.
Three quarters inch hail was reported in Muskegon.
Hail up to three quarters of an inch in diameter was reported four miles north of Zeeland, and hail briefly covered the ground there.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2003Every state in 2003This day in weather historyWarnings in Michigan, August 2003
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: 5377356, 5377357, 5377358, 5377359, 5369153, 5369154, 5369155, 5369156, 5369408, 5369409, 5369410.