Several large trees were blown down by scattered severe storms that impacted portions of south central lower Michigan.
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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 episode as NWS GRR wrote it up.
Several large trees were blown down by scattered severe storms that impacted portions of south central lower Michigan.
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 27, 2:35 AM EST, 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND RAPIDS MI 335 AM EDT TUE AUG 27 2013 LATEST UPDATE... SYNOPSIS/SHORT TERM/LONG TERM/HYDRO/MARINE .SYNOPSIS... ISSUED AT 335 AM EDT TUE AUG 27 2013 PERIODS OF SHOWERS AND STORMS WILL BE LIKELY TODAY AND BECOME EVEN MORE NUMEROUS TONIGHT. A FEW OF THESE STORMS COULD BE SEVERE THIS EVENING. THE AREA WILL DRY OUT BY MID DAY WEDNESDAY...WITH CONTINUED DRY WEATHER INTO THURSDAY. IT WILL REMAIN WARM AND HUMID WITH HIGH TEMPERATURES MAINLY IN THE MID TO UPPER 80S. BY THE HOLIDAY WEEKEND ANOTHER FRONT MOVES INTO THE REGION AND COULD GIVE SOUTHWEST MICHIGAN SCATTERED SHOWERS AND STORMS FRIDAY NIGHT INTO SUNDAY NIGHT. TEMPERATURES ARE EXPECTED TO REMAIN IN THE 80S. && .SHORT TERM...(TODAY THROUGH THURSDAY) ISSUED AT 335 AM EDT TUE AUG 27 2013 CLUSTERS OF THUNDERSTORMS EXTENDED FROM NORTHERN MN TO NORTHERN LAKE MICHIGAN EARLY THIS MORNING. THESE WERE ALONG A WARM FRONT AND GIVEN THE NW UPPER FLOW SHOULD BEND INTO THE GRR CWA THIS MORNING. GIVEN THE 0-6 KM SHEAR VALUES REMAIN 30-35 KTS MUCH OF THE DAY...THESE CLUSTER SHOULD SURVIVE...BUT ALSO SLOWLY WEAKEN AS THE RUN AWAY FROM THE BEST JET DYNAMICS OVER NORTHERN WI/MI. FEEL THE THREAT OF SEVERE STORMS REMAINS LOW TODAY...BUT SOME HEAVIER RAIN COULD BE SEEN MAINLY NORTH OF A LDM-AMN LINE. IT WILL REMAIN WARM AND HUMID WITH HIGHS IN THE MID TO UPPER 80S...WITH HEAT INDEX READINGS PERHAPS REACHING THE MID 90S. SEEMS LIKE A BETTER CHANCE FOR SEVERE STORMS INTO THIS EVENING AS CAPES VALUES SHOULD RECOVER AND A LOW LEVEL JET NOSES INTO SW MI. SHEAR VALUES ALSO REMAIN 30-35 KTS...FAVORING ORGANIZED STORMS. DAMAGING WINDS SHOULD BE THE MAIN THREAT OVER THE ENTIRE CWA...BUT HAIL COULD ALSO OCCUR. AND WITH THE SURFACE BOUNDARY SAGGING INTO THE CWA AN ISOLATED TORNADO WOULD ALSO BE POSSIBLE...MAINLY ALONG AND NORTH OF I-96. THE SEVERE THREAT SHOULD DIMINISH AFTER MIDNIGHT AS THE LOW LEVEL JET IS SHOWN TO WEAKEN AND THE INSTABILITY SUBSIDES. THE FRONT APPEARS TO BE SLIGHTLY SLOWER...SO HAVE POPS INTO EARLY WED FOR AREAS MAINLY SE OF I-69. OTHERWISE THE WED/THU PERIOD LOOKS DRY AND CONTINUED WARM. HOWEVER LOWERED MAX TEMP FOR WED BY SEVERAL DEGREES GIVEN SOME LINGERING CLOUDS AND WITH THE PASSAGE OF THE FRONT. DEW POINTS SHOULD FINALLY DROPPED OFF WED NIGHT...MAKING FOR A MORE COMFORTABLE THU WITH A DRIER NE FLOW. .LONG TERM...(THURSDAY NIGHT THROUGH MONDAY) ISSUED AT 335 AM EDT TUE AUG 27 2013 THE FORECAST FOR THE UPCOMING HOLIDAY WEEKEND IS A LOW CONFIDENCE ONE AT THIS TIME... BUT IS LOOKING WARM/HUMID AND STORMY TO START FOLLOWED BY A POTENTIAL SHARP COOL DOWN IN THE LATTER PART OF THE WEEKEND. LATE THIS WEEK AND OVER THE WEEKEND THE LARGE UPPER HIGH CENTERED OVER MISSOURI IS PROGGED TO RETROGRADE WEST SO THAT BY MONDAY THE UPPER RIDGE AXIS IS JUST EAST OF THE ROCKY MOUNTAINS. THE AMPLIFICATION OF THE RIDGE IN THIS AREA IS AIDED BY AN UPPER LOW MOVING INTO THE PACIFIC NORTHWEST. CONSEQUENTLY HEIGHTS OVER THE GREAT LAKES REGION FALL WITH THE UPPER FLOW BECOMING NORTHWESTERLY. THE ECWMF CONTINUES TO BE MORE AGGRESSIVE WITH HEIGHT FALLS LATE IN THE WEEKEND BUT EVEN THE GFS SOLUTION WOULD SEND A DECENT COLD FRONT AND COOLER AIR INTO THE REGION SUNDAY NIGHT/MONDAY. WILL HAVE TO CARRY A CHANCE OF SHOWERS AND TSTMS EACH DAY FRI/SAT/SUN AS WE WILL STILL BE IN THE WARM/HUMID AND UNSTABLE AIR MASS WITH OCNL MCS ACTIVITY RIDING AROUND THE UPPER RIDGE. MUCH OF THE TIME IT WILL NOT BE RAINING BUT A FEW EPISODES OF TSTMS ARE CERTAINLY POSSIBLE. GUIDANCE IS IN FAIR AGREEMENT ON A FROPA SUNDAY NIGHT... WITH COLD ADVECTION BEHIND IT POSSIBLY RESULTING IN SOME INSTABILITY SHOWERS ON LABOR DAY. AGAIN THE ECMWF SUPPORTS A FAIRLY CHILLY DAY WITH HIGHS PERHAPS ONLY AROUND 70... BUT WILL STICK WITH THE MORE CONSERVATIVE GFS FOR NOW. && .AVIATION...(FOR THE 06Z TAFS THROUGH 06Z TUESDAY NIGHT) ISSUED AT 1155 PM EDT MON AUG 26 2013 EXPECT SOME HAZE AND FOG BRINGING AREAS OF MVFR OVERNIGHT. SHOWERS AND THUNDERSTORMS ACROSS WISCONSIN AT 06Z SHOULD REACH MKG AROUND 10Z THEN SPREAD SOUTHEAST TO JXN BY 12Z. AREAS OF MVFR AND ISOLATED IFR POSSIBLE AS THE STORMS MOVE THROUGH ALONG WITH ISOLATED STRONG GUSTY WINDS. SHOWERS AND THUNDERSTORMS REMAIN POSSIBLE MUCH OF TUESDAY AFTERNOON AND EVENING BUT TIMING AND LOCATION IS UNCERTAIN. && .MARINE... ISSUED AT 335 AM EDT TUE AUG 27 2013 NO HEADLINES EXPECTED THROUGH THE SHORT TERM. HOWEVER THERE WILL BE PERIODS OF ROUGHER CONDITIONS. THE FIRST PERIOD WILL BE THIS MORNING AS SW FLOW AHEAD OF THE APPROACHING FRONT WILL PRODUCE STRONG WINDS OVER THE SOUTHERN PART OF THE LAKE. SOME 3 FOOT WAVES SHOULD BE SEEN SOUTH OF HOLLAND...BUT THESE SHOULD SUBSIDE INTO THIS AFTERNOON AS THE FRONT GETS CLOSER. THE SECOND PERIOD OF ROUGHER CONDITIONS WILL BE FROM LATE WED AFTERNOON THROUGH THE FIRST HALF OF WED NIGHT FOR THE ENTIRE NEARSHORE WATERS. NORTHERN FLOW BEHIND THE DEPARTING FRONT WILL INCREASE TO AROUND 15 KTS AND ANOTHER PERIOD OF 3 FOOT WAVES WILL BE LIKELY. && .HYDROLOGY... ISSUED AT 335 AM EDT TUE AUG 27 2013 RIVER BASIN AVERAGES SHOULD REMAIN UNDER AN INCH WITH THE RAIN THROUGH WED MORNING. HOWEVER LOCALIZED HEAVIER RAINS WILL BE POSSIBLE. THIS SEEMS MOST LIKELY ACROSS THE NE HALF OF THE CWA WHERE POOR DRAINAGE AREAS COULD SEE NUISANCE TYPE FLOODING. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...NONE. LM...NONE. && SYNOPSIS...JK SHORT TERM...JK LONG TERM...MEADE AVIATION...OSTUNO HYDROLOGY...JK MARINE...JK
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 355 PM EDT MON AUG 26 2013 MIZ037>040-043>046-050>052-056>059-064>067-071>074-271030- MASON-LAKE-OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON- MONTCALM-GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON- INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON- 355 PM EDT MON AUG 26 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND TONIGHT WITH THE BEST CHANCES BEING ACROSS CENTRAL LOWER MICHIGAN INTO EVENING. ADDITIONAL STORMS MAY MOVE INTO THE AREA LATE TONIGHT FROM THE WEST. AN ISOLATED STRONG TO SEVERE STORM IS POSSIBLE. DAMAGING WIND GUSTS TO AROUND 60 MPH AND TORRENTIAL RAINS WILL BE THE MAIN THREATS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ADDITIONAL STORMS ARE EXPECTED TUESDAY INTO TUESDAY NIGHT. THE STORM PREDICTION CENTER HAS PLACED THE AREA UNDER A SLIGHT RISK FOR SEVERE STORMS ON TUESDAY. STORMS WILL HAVE THE CAPABILITY TO PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH AND TORRENTIAL RAINS WITH THE THREAT OF FLOODING. HEAT AND HUMIDITY WILL COMBINE TO PRODUCE HEAT INDEX VALUES IN THE 90S BOTH TODAY AND TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS POSSIBLE BOTH TODAY AND AGAIN ON TUESDAY. LMZ844>849-271030- ST JOSEPH TO SOUTH HAVEN MI-SOUTH HAVEN TO HOLLAND MI- HOLLAND TO GRAND HAVEN MI-GRAND HAVEN TO WHITEHALL MI- WHITEHALL TO PENTWATER MI-PENTWATER TO MANISTEE MI- 355 PM EDT MON AUG 26 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH TONIGHT OVER LAKE MICHIGAN. STRONG TO SEVERE STORMS MAY OCCUR. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ADDITIONAL STORMS ARE EXPECTED ON TUESDAY AND TUESDAY NIGHT. THESE STORMS HAVE THE POTENTIAL TO BE STRONG TO SEVERE AS WELL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS POSSIBLE BOTH TODAY AND AGAIN ON TUESDAY. DUKE WDM NJJ
The Grand Rapids radar (KGRR), 124 km away, was scanning. The volume nearest the first event began at 07:52 UTC.
1 thunderstorm wind. Local standard time, as filed.
A county official reported that multiple large trees were blown down near Wiley. This storm also brought down scattered branches in Lake and Newaygo Counties.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2013Every state in 2013This day in weather historyWarnings in Michigan, August 2013
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: 467951.