1 thunderstorm wind, as filed by the National Weather Service.
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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 30, 2:23 PM EST, 5 hours 52 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND RAPIDS MI 323 PM EDT THU AUG 30 2001 WITH THE CAP DISSIPATING...WE SHOULD SEE AN INCREASE IN THE SHOWERS AND THUNDERSTORMS OVER THE NEXT SEVERAL HOURS. ATMOSPHERE IS VERY UNSTABLE WITH LIFTED INDEX VALUES OF MINUS 5 TO MINUS 7 ACROSS THE REGION. STRONG CONVECTION OVER WESTERN INDIANA COULD PLAY A ROLE IN CUTTING OFF THE MOISTURE TRANSPORTING NORTHEASTWARD INTO LOWER MI. ALTHOUGH IT IS FAIRLY MOIST ALREADY. BEST PVA IS IN MY NORTHERN COUNTIES. LOW LEVEL FORCING ALONG THE FRONT IS PROGGED TO INCREASE AS IT PUSHES THROUGH. AT THIS WILL CONTINUE WITH THE LIKELY SHOWERS AND THUNDERSTORMS CONSIDERING THE MOISTURE...LIFT AND INSTABILITY. AFTER SOME LEFTOVER SHOWERS FOR FRIDAY MORNING...DRY WEATHER SHOULD PREVAIL. AM EXPECTING ALOT OF CU...WHICH WILL LEAD TO AT LEAST PARTLY CLOUDY SKIES. IT WILL BE COOLER WITH HIGHS ONLY AROUND 70. SKIES SHOULD CLEAR OUT RAPIDLY FRIDAY EVENING....LEADING TO A GOOD RADIATIONAL COOLING NIGHT. HIGH PRESSURE WILL BE PUSHING SOUTHEAST THROUGH NORTHERN LOWER MI. LOWS ARE EXPECTED TO BE IN THE 40S. THIS HIGH PRESSURE SYSTEM SHIFTS EAST OF MI ON SATURDAY...WHICH WILL KEEP OUR WEATHER DRY ALONG WITH FEWER CLOUDS. WARM AIR ADVECTION DEVELOP SATURDAY NIGHT...AND WILL FEATURE PARTLY CLOUDY SKIES. MJS EXTENDED FORECAST DISCUSSION... QUIET WEATHER SHOULD PREVAIL FOR THE EXTENDED PERIOD. A COOL AND DRY AIR MASS BEHIND FRIDAY/S DEPARTING COLD FRONT WILL SUPPLY THE REGION WITH BELOW NORMAL TEMPS OVER THE WEEKEND AS MAXS ONLY FLIRT WITH THE 70 DEGREE MARK AND MINS DROP INTO THE 40S. TEMPERATURES DO START WARMING BY THE FIRST OF NEXT WEEK. SHORT WAVE WILL DIG INTO THE NORTHEAST THIS WEEKEND BUT FLOW WILL BECOME MOSTLY ZONAL WITH A FEW RIPPLES CUTTING ACROSS SRN CANADA THROUGH MUCH OF NEXT WEEK. SOME WAA IN THE PLAINS WILL KICK OFF SOME PCPN OVER THE WEEKEND NEAR THE CANADIAN BORDER...BUT THE BEST WAA WILL MOVE OFF INTO CANADA. HIGH PRESSURE RIDGE WILL REMAIN OVER SRN LOWER MICHIGAN THROUGH THE MIDDLE OF NEXT WEEK KEEPING US DRY. DGH .GRR...NONE
The Grand Rapids radar (KGRR), 115 km away, was scanning. The volume nearest the first event began at 01:16 UTC.
1 thunderstorm wind. Local standard time, as filed.
Very strong winds from a microburst brought down many trees and power lines across mainly the southern third of Lake county. In Idlewild, an area of trees a 100 yards long was blown down.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2001Every state in 2001This day in weather historyWarnings in Michigan, August 2001
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: 5266991.