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 12, 10:20 AM EST, 4 hours 40 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND RAPIDS MI 1120 AM EDT MON AUG 12 2002 AT 1500 UTC A SURFACE LOW NEAR LAKE WINNIPEG WAS MOVING SLOWLY TO THE NORTHEAST AS AN UPPER LEVEL TROUGH MOVES THOUGH THE NORTHERN PLAINS. TRAILING COLD FRONT STRETCHED ACROSS INTO CENTRAL MN INTO EASTERN NEBRASKA WITH WARM FRONTAL FEATURE EXTENDING ACROSS LAKE SUPERIOR. SHORTWAVE RIDGING OVER MI EARLY THIS MORNING WILL DRIFT SLOWLY TO THE EAST THIS AFTERNOON. SW MI FIRMLY IN THE WARM SECTOR WITH PLENTY OF LOW LEVEL MOISTURE AS INDICATED WITH DEWPOINTS IN THE UPPER 60S. SHOULD HAVE PLENTY OF INSTABILITY IN PLACE THIS AFTERNOON AS TEMPERATURES RISE INTO THE UPPER 80S OVER INLAND AREAS. A MODIFIED LAPS SOUNDING NEAR GRR WITH A TEMPERATURE OF 88F AND DEWPOINT OF 67F YIELDS CAPE IN THE 2000-2500 J/KG RANGE. WITH PLENTY OF LOW LEVEL MOISTURE AND INSTABILITY IN PLACE ONLY ITEM TRULY LACKING IS A LOW LEVEL FOCUS TO INITIATE CONVECTION. WITH FRONT WELL OFF TO THE WEST WE SHOULD NOT SEE A REAL GOOD SOURCE OF LOW LEVEL FORCING THROUGH THE AFTERNOON ALTHOUGH THERE IS A WEAK CONVERGENCE ZONE CROSSING LAKE MI THIS MORNING. ALSO WEAK RIPPLE NOTED IN WATER VAPOR IMAGERY HEADING NORTHEAST INTO LAKE MI THIS MORNING AND SOME WEAK SHOWERS AND THUNDERSTORMS HAVE DEVELOPED ACROSS SE WI. WITH PLENTY OF INSTABILITY AND MOISTURE AND A LACK OF INHIBITION THIS AFTERNOON IT WILL NOT TAKE MUCH TO GENERATE SCATTERED CONVECTION AND WEAK CONVERGENCE ZONE MAY BE ENOUGH TO DO IT. THEREFORE...WILL KEEP CHANCE POPS GOING THIS AFTERNOON. OTHERWISE ONLY MADE MINOR ADJUSTMENTS TO TEMPERATURES ALONG THE LAKESHORE AND UPDATED CLOUD COVER WORDING FOR THIS AFTERNOON. GRAHAM .GRR...NONE.
MIZ037>040-043>046-050>052-056>059-064>067-071>074-131100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 1220 PM EDT MON AUG 12 2002 ...HAZARDOUS WEATHER POTENTIAL STATEMENT FOR THE SOUTHWEST QUARTER OF LOWER MICHIGAN FOR TODAY AND TONIGHT... DISPATCHERS...PLEASE NOTIFY YOUR EMERGENCY MANAGERS. HAZARDS... THERE IS A SLIGHT RISK SEVERE THUNDERSTORMS TONIGHT NORTH OF A LINE FROM LANSING TO KALAMAZOO. HAIL TO ONE INCH IN DIAMETER AND WIND GUSTS TO 60 MPH AREA POSSIBLE FROM THE STRONGEST THUNDERSTORMS. THE STRONGER THUNDERSTORMS WILL MOVE TO THE NORTHEAST AROUND 15 MPH. DISCUSSION... A SEASONABLY STRONG UPPER LEVEL TROUGH IS MOVING THROUGH THE NORTHERN PLAINS TODAY AND TONIGHT. THE SURFACE LOW ASSOCIATED WITH THIS SYSTEM WAS LOCATED NEAR LAKE WINNIPEG THIS MORNING AND WILL MOVE SLOWLY TO THE NORTHEAST THROUGH TONIGHT. A SURFACE COLD FRONT ASSOCIATED WITH THIS AREA OF LOW PRESSURE EXTENDED THROUGH CENTRAL MINNESOTA AND INTO EASTERN NEBRASKA WHILE A WARM FRONT WAS DRAPED ACROSS LAKE SUPERIOR. AHEAD OF THE COLD FRONT A VERY WARM MOIST AND UNSTABLE AIRMASS IS IN PLACE ACROSS LOWER MICHIGAN. AS LOW LEVEL BOUNDARIES GENERATED BY CONVECTION TO THE WEST APPROACH LOWER MICHIGAN THIS AFTERNOON SCATTERED CONVECTION IS EXPECTED TO DEVELOP. THERE IS A SLIGHT RISK THAT SOME STORMS COULD BE SEVERE PRODUCING WIND GUSTS TO 60 MPH AND HAIL TO ONE INCH IN DIAMETER. THE THREAT OF ISOLATED SEVERE WEATHER THIS AFTERNOON IS PRIMARILY NORTH OF A LANSING TO KALAMAZOO LINE. IN ADDITION STRONG TO SEVERE CONVECTION IS EXPECTED TO DEVELOP CLOSER TO THE COLD FRONT ACROSS WISCONSIN SOUTHWEST INTO IOWA LATER THIS AFTERNOON. THIS CONVECTION WILL THEN MOVE TO THE EAST AND MAY IMPACT SOUTHWEST LOWER MICHIGAN LATER TONIGHT. THERE IS A SLIGHT RISK THAT SOME OF THESE STORMS COULD CONTAIN DAMAGING WINDS AND LARGE HAIL DURING THE OVERNIGHT HOURS. SPOTTER ACTIVATION... SPOTTER ACTIVATION IS POSSIBLE THIS AFTERNOON THROUGH TONIGHT. ...HAZARDOUS WEATHER POTENTIAL STATEMENT FOR TUESDAY THROUGH FRIDAY... THAT COLD FRONT WILL CONTINUE TO WEAKEN AS IT CROSSES LOWER MICHIGAN ON TUESDAY. A WAVE IS EXPECTED TO DEVELOP ON THE FRONT TUESDAY AFTERNOON OVER ILLINOIS AND MOVE NORTHEAST INTO SOUTHWEST MICHIGAN TUESDAY NIGHT. BOTH THE FRONT MOVING ACROSS THE AREA TUESDAY AND THE WAVE ON THE FRONT MOVING INTO SOUTHWEST MICHIGAN TUESDAY NIGHT WILL BRING THE THREAT OF ISOLATED SEVERE THUNDERSTORMS TO THE AREA TUESDAY INTO EARLY WEDNESDAY. DUE TO BOTH THE SLOW MOVEMENT OF THE COLD FRONT PLUS THE DEVELOPING WAVE ON THE FRONT... THERE IS THE THREAT OF HEAVY RAINFALL OVER PARTS OF SOUTHWEST MICHIGAN TUESDAY AFTERNOON INTO EARLY WEDNESDAY MORNING. SINCE THIS AREA HAS BEEN ON THE DRY SIDE THIS SUMMER... MAJOR FLOODING IS NOT EXPECTED. HOWEVER... LOCAL FLOODING OF DRAINS AND SMALL CREEKS IS A GOOD POSSIBILITY FROM TUESDAY AFTERNOON INTO WEDNESDAY MORNING. THAT THREAT IS GREATEST SOUTH OF INTERSTATE 96. DRY WEATHER WILL PREVAIL AFTER THAT. WDM GRAHAM
MIZ037>040-043>046-050>052-056>059-064>067-071>074-131100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 1220 PM EDT MON AUG 12 2002 COR FOR TIME FRAME OF POTENTIAL SEVERE WEATHER IN HAZARDS SECTION ...HAZARDOUS WEATHER POTENTIAL STATEMENT FOR THE SOUTHWEST QUARTER OF LOWER MICHIGAN FOR TODAY AND TONIGHT... DISPATCHERS...PLEASE NOTIFY YOUR EMERGENCY MANAGERS. HAZARDS... THERE IS A SLIGHT OF RISK SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT NORTH OF A LINE FROM LANSING TO KALAMAZOO. HAIL TO ONE INCH IN DIAMETER AND WIND GUSTS TO 60 MPH ARE POSSIBLE FROM THE STRONGEST THUNDERSTORMS. THE STRONGER THUNDERSTORMS WILL MOVE TO THE NORTHEAST AROUND 15 MPH. DISCUSSION... A SEASONABLY STRONG UPPER LEVEL TROUGH IS MOVING THROUGH THE NORTHERN PLAINS TODAY AND TONIGHT. THE SURFACE LOW ASSOCIATED WITH THIS SYSTEM WAS LOCATED NEAR LAKE WINNIPEG THIS MORNING AND WILL MOVE SLOWLY TO THE NORTHEAST THROUGH TONIGHT. A SURFACE COLD FRONT ASSOCIATED WITH THIS AREA OF LOW PRESSURE EXTENDED THROUGH CENTRAL MINNESOTA AND INTO EASTERN NEBRASKA WHILE A WARM FRONT WAS DRAPED ACROSS LAKE SUPERIOR. AHEAD OF THE COLD FRONT A VERY WARM MOIST AND UNSTABLE AIRMASS IS IN PLACE ACROSS LOWER MICHIGAN. AS LOW LEVEL BOUNDARIES GENERATED BY CONVECTION TO THE WEST APPROACH LOWER MICHIGAN THIS AFTERNOON SCATTERED CONVECTION IS EXPECTED TO DEVELOP. THERE IS A SLIGHT RISK THAT SOME STORMS COULD BE SEVERE PRODUCING WIND GUSTS TO 60 MPH AND HAIL TO ONE INCH IN DIAMETER. THE THREAT OF ISOLATED SEVERE WEATHER THIS AFTERNOON IS PRIMARILY NORTH OF A LANSING TO KALAMAZOO LINE. IN ADDITION STRONG TO SEVERE CONVECTION IS EXPECTED TO DEVELOP CLOSER TO THE COLD FRONT ACROSS WISCONSIN SOUTHWEST INTO IOWA LATER THIS AFTERNOON. THIS CONVECTION WILL THEN MOVE TO THE EAST AND MAY IMPACT SOUTHWEST LOWER MICHIGAN LATER TONIGHT. THERE IS A SLIGHT RISK THAT SOME OF THESE STORMS COULD CONTAIN DAMAGING WINDS AND LARGE HAIL DURING THE OVERNIGHT HOURS. SPOTTER ACTIVATION... SPOTTER ACTIVATION IS POSSIBLE THIS AFTERNOON THROUGH TONIGHT. ...HAZARDOUS WEATHER POTENTIAL STATEMENT FOR TUESDAY THROUGH FRIDAY... A WEAKENING COLD FRONT WILL CROSS LOWER MICHIGAN ON TUESDAY. A WAVE OF LOW PRESSURE IS EXPECTED TO DEVELOP ON THE FRONT TUESDAY AFTERNOON OVER ILLINOIS AND MOVE NORTHEAST INTO SOUTHWEST MICHIGAN TUESDAY NIGHT. BOTH THE FRONT MOVING ACROSS THE AREA TUESDAY AND THE WAVE ON THE FRONT MOVING INTO SOUTHWEST MICHIGAN TUESDAY NIGHT WILL BRING THE THREAT OF ISOLATED SEVERE THUNDERSTORMS TO THE AREA TUESDAY INTO EARLY WEDNESDAY. DUE TO BOTH THE SLOW MOVEMENT OF THE COLD FRONT PLUS THE DEVELOPING WAVE ON THE FRONT... THERE IS THE THREAT OF HEAVY RAINFALL OVER PARTS OF SOUTHWEST MICHIGAN TUESDAY AFTERNOON INTO EARLY WEDNESDAY MORNING. SINCE THIS AREA HAS BEEN ON THE DRY SIDE THIS SUMMER... MAJOR FLOODING IS NOT EXPECTED. HOWEVER... LOCAL FLOODING OF DRAINS AND SMALL CREEKS IS A GOOD POSSIBILITY FROM TUESDAY AFTERNOON INTO WEDNESDAY MORNING. THAT THREAT IS GREATEST SOUTH OF INTERSTATE 96. DRY WEATHER WILL PREVAIL AFTER THAT. WDM GRAHAM
The Grand Rapids radar (KGRR), 23 km away, was scanning. The volume nearest the first event began at 20:00 UTC.
1 thunderstorm wind. Local standard time, as filed.
A thunderstorm wind gust blew over a camping trailer and also blew shingles off of homes.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2002Every state in 2002This day in weather historyWarnings in Michigan, August 2002
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: 5315642.