4 thunderstorm wind, 1 hail, 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 9, 3:15 PM EST, 4 hours 10 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND RAPIDS MI 415 PM EDT MON AUG 9 2004 .SHORT TERM... THE FIRST SHORTWAVE OVER NORTHEAST MINNESOTA IS SHOWN BY THE MODELS TO PULL INTO NORTHERN LOWER MICHIGAN ON TUESDAY. THIS SYSTEM WILL SWING A COLD FRONT THROUGH LOWER MICHIGAN THIS EVENING...TOUCHING OFF SOME SHOWER AND THUNDERSTORMS. WITH CAPE VALUES OVER 1500 J/KG2 AND A 50 KT MID LEVEL SPEED MAX ACCOMPANYING THE FRONT...SOME SEVERE WEATHER IS STILL POSSIBLE. THE FRONT HAS HAD A HARD TIME GENERATING SHOWERS...POSSIBLY THE RESULT OF LIMITED CONVERGENCE...PLUS THE MID LEVEL LAPSE RATE ARE NOT FAVORABLE. THE CONVERGENCE IS FORECAST TO STRENGTHEN AROUND 00Z PLUS MID LEVEL LAPSE RATES DO BECOME STEEPER. SO THERE IS STILL SOME SEVERE WEATHER POTENTIAL. COLD AIR ADVECTION STRENGTHENS BEHIND THE FRONT TONIGHT AND CONTINUES INTO TUESDAY. IN ADDITION SOME VORTICITY ADVECTION SHOWS UP FOR THE AFTERNOON...SO SOME SHOWERS ARE POSSIBLE. THETA E STILL DECREASES WITH HEIGHT...SO WILL LEAVE THE MENTION OF AN ISOLATED THUNDERSTORM IN THERE. THE COMBINATION OF WINDS AND COOLER AIR MOVING OVER LAKE MICHIGAN SHOULD GENERATE SOME HIGHER WAVES. WILL HAVE SMALL CRAFT ADVISORIES UP FOR THE ENTIRE LAKESHORE. ANOTHER SHORTWAVE ARRIVES FOR WEDNESDAY...AND THE AIRMASS IS EVEN COOLER. MANY LOCATIONS SHOULD STAY IN THE 60S FOR HIGHS. IF IT ENDS UP BEING WET THROUGH MUCH OF THE DAY...SOME PLACES MAY GET STUCK IN THE 50S. RIGHT NOW...WILL CONTINUE THE SCATTERED SHOWERS IN THE FORECAST...WITH HIGHS MAINLY IN THE 60S. && .LONG TERM... MID LVL TROUGH IS EXPECTED TO DEEPEN ACROSS THE GREAT LAKES REGION MID TO LATE WEEK...WITH HIGH AMPLITUDE RIDGING ACROSS INTERIOR WEST AND STRETCH NORTH THROUGH WESTERN CANADA. THIS WILL ALLOW A CONTINUED UNSETTLED WEATHER PATTERN THROUGH THE NORTHERN LATITUDES OF THE GREAT LAKES AND NORTHERN PLAINS THROUGH MID TO LATE WEEK. EXPECT COOL AIR TO CONTINUE TO SLIDE SOUTH FROM WESTERN ONTARIO AND THE CANADIAN PRAIRIES. GIVEN THE AMPLE AMOUNTS OF CLOUD COVER LATE WEEK...THICKNESS VALUES ON FRIDAY 1350 DECAMETERS...WE MAY BE SEEING HIGHS REMAINING IN THE LOWER 70S POSSIBLY THE UPPER 60S ACROSS NORTHERN SECTIONS OF OUR CWA. 1000-700MB RH PROFILE SUGGESTS PARTLY TO MOSTLY CLOUDY SKIES LATE WEEK...GIVING WAY TO PARTLY CLOUDY SKIES OVER THE WEEKEND. UPPER LEVEL TROUGH BEGINS TO RELAX EARLY ON THE WEEKEND...ALLOWING A RETURN TO NORMAL CONDITIONS. EXPECT FLOW TO REMAIN FROM THE WEST AT THE MID LVLS...WHICH WILL NOT ALLOW TEMPERATURES TO GET MUCH WARMER THAN AROUND 80 BY SUNDAY AND MONDAY. BY MONDAY THE ENSEMBLES SUGGEST A WEAK SHORTWAVE TO DEVELOP ACROSS THE CENTRAL PLAINS...AND POTENTIALLY PRODUCE SCATTERED SHOWERS AND THUNDERSTORMS MONDAY AFTERNOON. FOR NOW WILL HOLD OFF ON MENTION OF PRECIP FOR MONDAY...AS MOISTURE SOURCE MAY BE OF CONCERN. && .GRR WATCHES/WARNINGS/ADVISORIES...NONE. && MJS BEACHLER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 453 PM EDT MON AUG 9 2004 LMZ844>849-MIZ037-043-050-056-064-071-101000- ALLEGAN-MASON-MUSKEGON-OCEANA-OTTAWA-VAN BUREN- GRAND HAVEN TO WHITEHALL MI-HOLLAND TO GRAND HAVEN MI- PENTWATER TO MANISTEE, MI-SOUTH HAVEN TO HOLLAND MI- ST JOSEPH TO SOUTH HAVEN MI-WHITEHALL TO PENTWATER MI- 453 PM EDT MON AUG 9 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS THE POTENTIAL FOR SEVERE THUNDERSTORMS THIS EVENING ACROSS ALL OF SOUTHWEST LOWER MICHIGAN. SCATTERED THUNDERSTORMS ARE FORECASTED TO FORM ALONG AND AHEAD OF A COLD FRONT LOCATED IN EASTERN WISCONSIN. THIS FRONT WILL PUSH EAST OF THE LANSING AREA BY MIDNIGHT. SOME OF THESE STORMS COULD BECOME SEVERE. THE PRIMARY THREAT FROM THESE STORMS WILL BE DAMAGING WINDS IN EXCESS OF 60 MPH. IN ADDITION...THE STRONGEST STORMS WILL BE CAPABLE OF PRODUCING HAIL TO ONE INCH IN DIAMETER AS WELL AS TORRENTIAL DOWNPOURS. AN ISOLATED TORNADO IS ALSO POSSIBLE. THE STORMS WILL MOVE EAST AT 30 MPH. WAVES OF 3 TO 5 FEET IN THE NEARSHORE WATERS FROM NEW BUFFALO TO MANISTEE WILL RESULT IN HAZARDOUS CONDITIONS FOR SMALL CRAFT THROUGH TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY BREEZY CONDITIONS BEHIND A SEASONABLY STRONG COLD FRONT WILL BUILD WAVES TO 4 TO 7 FEET ACROSS THE NEARSHORE WATERS FROM NEW BUFFALO TO MANISTEE ON TUESDAY AND TUESDAY NIGHT. GIVEN THE PRIMARILY WESTERLY COMPONENT OF THE WIND AND THE HEIGHT OF THE WAVES RIP CURRENTS WILL BE POSSIBLE AT AREA BEACHES ON TUESDAY AND TUESDAY NIGHT. THERE WILL BE THE CHANCE FOR SHOWERS AND THUNDERSTORMS TUESDAY THROUGH FRIDAY...PARTICULARLY DURING THE AFTERNOON AND EARLY EVENING HOURS EACH DAY...AS A STRONG UPPER TROUGH SETTLES IN OVER THE GREAT LAKES REGION. TEMPERATURES WILL BE COOLER THAN NORMAL TUESDAY THROUGH FRIDAY AS A COOL CANADIAN AIRMASS DROPS INTO THE REGION. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS EVENING. MIZ038>040-044>046-051-052-057>059-065>067-072>074-101000- BARRY-CALHOUN-CLARE-CLINTON-EATON-GRATIOT-INGHAM-IONIA-ISABELLA- JACKSON-KALAMAZOO-KENT-LAKE-MECOSTA-MONTCALM-NEWAYGO-OSCEOLA- 453 PM EDT MON AUG 9 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...THIS EVENING AND TONIGHT THERE IS THE POTENTIAL FOR SEVERE THUNDERSTORMS THIS EVENING ACROSS ALL OF SOUTHWEST LOWER MICHIGAN. SCATTERED THUNDERSTORMS ARE FORECASTED TO FORM ALONG AND AHEAD OF A COLD FRONT LOCATED IN EASTERN WISCONSIN. THIS FRONT WILL PUSH EAST OF THE LANSING AREA BY MIDNIGHT. SOME OF THESE STORMS COULD BECOME SEVERE. THE PRIMARY THREAT FROM THESE STORMS WILL BE DAMAGING WINDS IN EXCESS OF 60 MPH. IN ADDITION...THE STRONGEST STORMS WILL BE CAPABLE OF PRODUCING HAIL TO ONE INCH IN DIAMETER AS WELL AS TORRENTIAL DOWNPOURS. AN ISOLATED TORNADO IS ALSO POSSIBLE. THE STORMS WILL MOVE EAST AT 30 MPH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE WILL BE THE CHANCE FOR SHOWERS AND THUNDERSTORMS TUESDAY THROUGH FRIDAY...PARTICULARLY DURING THE AFTERNOON AND EARLY EVENING HOURS EACH DAY...AS A STRONG UPPER TROUGH SETTLES IN OVER THE GREAT LAKES REGION. TEMPERATURES WILL BE COOLER THAN NORMAL TUESDAY THROUGH FRIDAY AS A COOL CANADIAN AIRMASS DROPS INTO THE REGION. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS EVENING. MJS
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
816 PM EDT MON AUG 9 2004
MIZ037>040-043>046-050>052-056>059-064>067-071>074-100500-
ALLEGAN-BARRY-CALHOUN-CLARE-CLINTON-EATON-GRATIOT-INGHAM-IONIA-
ISABELLA-JACKSON-KALAMAZOO-KENT-LAKE-MASON-MECOSTA-MONTCALM-MUSKEGON-
NEWAYGO-OCEANA-OSCEOLA-OTTAWA-VAN BUREN-
816 PM EDT MON AUG 9 2004
THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH
FOR PORTIONS OF THE SOUTHWEST QUARTER OF LOWER MICHIGAN EFFECTIVE
UNTIL 100 AM EDT TUESDAY MORNING. THIS WATCH INCLUDES THE FOLLOWING
COUNTIES
IN WEST CENTRAL MICHIGAN
MASON...LAKE...OCEANA...NEWAYGO AND MUSKEGON
IN CENTRAL MICHIGAN
OSCEOLA...CLARE...ISABELLA...MECOSTA...MONTCALM AND GRATIOT
IN SOUTHWEST MICHIGAN
KENT...ALLEGAN...BARRY...KALAMAZOO...VAN BUREN AND OTTAWA
IN SOUTH CENTRAL MICHIGAN
IONIA...CLINTON...INGHAM...EATON...JACKSON AND CALHOUN
THIS WATCH INCLUDES THE ADJOINING COASTAL WATERS OF AFFECTED
LAKESHORE COUNTIES.
A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR
THE DEVELOPMENT OF SEVERE THUNDERSTORMS IN AND NEAR THE WATCH AREA.
REMEMBER...SEVERE THUNDERSTORMS PRODUCE WIND GUSTS IN EXCESS OF 58
MPH AND/OR HAIL THREE-QUARTERS OF AN INCH IN DIAMETER OR GREATER. IF
YOU LIVE IN OR NEAR THE WATCH AREA YOU SHOULD REMAIN ALERT TO RAPIDLY
CHANGING WEATHER CONDITIONS. STAY TUNED TO NOAA WEATHER RADIO OR THE
LOCAL NEWS OUTLETS FOR THE LATEST UPDATES AND POSSIBLE WARNINGS.
MEADEThe Grand Rapids radar (KGRR), 12 km away, was scanning. The volume nearest the first event began at 00:25 UTC.
4 thunderstorm wind, 1 hail. Local standard time, as filed.
A trained spotter 6 miles west of Greenville reported that an eighteen inch diameter tree as well as numerous wires were blown down.
Several trees were blown down three miles north of Gobles including one which was blown down onto a car.
A trained spotter reported one inch diameter hail in Greenville.
Law enforcement reported that numerous trees were blown down in Cooper and Richland.
Law enforcement seven miles northwest of Marshall reported that numerous trees were blown down at the intersection of N Drive and 13 Mile Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2004Every state in 2004This day in weather historyWarnings in Michigan, August 2004
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: 5419468, 5419520, 5419521, 5419522, 5419523.