2 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 25, 9:47 PM EST, 13 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND RAPIDS MI 1047 PM EDT MON AUG 25 2003 ELEVATED CONVECTION CONTINUES THIS EVENING ALONG A WEAKLY DEFINED SURFACE BOUNDARY. A SHORT WAVE WAS MOVING INTO WESTERN MI AT 02Z AND WILL BE TO THE EASTERN PORTION OF THE STATE SHORTLY AFTER MIDNIGHT. A STORM OR TWO COULD BECOME SEVERE WITH HAIL BEING THE MAIN THREAT. THERE SHOULD BE A BRIEF PAUSE IN THE ACTIVITY AFTER 04Z AS THIS WAVE EXITS. ANOTHER SHORT WAVE WAS SPAWNING STORMS OVER EASTERN IA. THIS WAVE SHOULD MOVE TO SOUTHERN LAKE MICHIGAN BY 12Z. THIS SHOULD PUSH ANOTHER ROUND OF STORMS INTO WESTERN MI AFTER 08Z. THE 00Z ETA LOW LEVEL JET IS NOT TOO IMPRESSIVE...ONLY 30KT...AND POINTS TOWARD SOUTHERN LAKE MI/NORTHERN INDIANA. THIS WOULD MAINLY FAVOR THE SOUTHERN CWA FOR THE BEST CHC OF SEEING THE NEXT ROUND OF STORMS. ALSO 1000-500 THICKNESS WOULD SUPPORT THE IA STORMS TRACKING EAST...THEN SOUTHEAST AS THEY MOVE TOWARD SOUTHERN MI. WITH PRECIPITABLE WATER VALUES PEAKING ABOVE 2 INCHES AFTER MIDNIGHT HEAVY DOWNPOURS ARE A GOOD BET AND A COUPLE OF ISOLATED SEVERE STORMS CAN NOT BE RULED OUT. STORMS SHOULD MOVE AT 35-40KT...BUT SOME CELLS MAY TRAIN SO SOME URBAN OR SMALL STREAM FLOODING IS POSSIBLE. WILL CARRY CATEGORICAL POPS SOUTH...LIKELY CENTRAL...AND KNOCK THE POPS DOWN TO CHC IN THE NORTH. JK .GRR...NONE.
MIZ037>040-043>046-050>052-056>059-064>067-071>074-261000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 213 PM EDT MON AUG 25 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE SOUTHWEST QUARTER OF LOWER MICHIGAN. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS SHOULD FORM THIS AFTERNOON AND NUMEROUS STORMS ARE FORECASTED FOR TONIGHT ACROSS THE SOUTHWEST QUARTER OF LOWER MICHIGAN. THE STORM PREDICTION CENTER HAS PLACED THE ENTIRE AREA IN A SLIGHT RISK FOR SEVERE THUNDERSTORMS. THE BEST CHANCE FOR STORMS WILL BE THIS EVENING AS A WARM FRONT LIFTS NORTH THROUGH THE AREA AND THEN AGAIN OVERNIGHT AS A COLD FRONT APPROACHES FROM THE NORTHWEST. THE STRONGEST OF STORMS...MOST LIKELY TONIGHT...WILL BE CAPABLE OF WINDS TO 60 MPH AND HAIL TO AROUND AN INCH IN DIAMETER. FREQUENT CLOUD TO GROUND LIGHTNING STRIKES AND HEAVY RAIN WILL ACCOMPANY THE STORMS. WHERE THE STORMS PERSIST LONGER THAN AN HOUR...MORE THAN 2 INCHES OF RAIN COULD FALL. THIS WOULD LEAD TO URBAN AND POOR DRAINAGE FLOODING. THE MOST LIKELY TIME FRAME FOR THIS TO OCCUR IS AFTER MIDNIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THE AREA IS ALSO IN A SLIGHT RISK FOR SEVERE THUNDERSTORMS ON TUESDAY. THE COLD FRONT WILL PROGRESS THROUGH THE AREA INTO A VERY MOIST AND UNSTABLE AIRMASS. STRONG STORMS COULD BE ONGOING TO START THE DAY. DURING THE AFTERNOON...ANOTHER ROUND OF THUNDERSTORMS IS EXPECTED. THESE STORMS COULD ALSO CONTAIN WINDS TO 60 MPH AND HAIL TO AROUND AN INCH IN DIAMETER. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING OR TONIGHT. RJD MJS
The Grand Rapids radar (KGRR), 85 km away, was scanning. The volume nearest the first event began at 02:59 UTC.
2 thunderstorm wind. Local standard time, as filed.
Severe thunderstorm wind gusts blew down numerous trees and power lines, some of which landed on roads, across the southern portion of Calhoun county from Ceresco to Homer.
Numerous trees were blown down across Hanover township.
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: 5368383, 5368384.