Severe storms produced a measured wind gust of 64 mph at the South Haven GLERL site and to around 60 mph in Okemos near Lansing.
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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.
Severe storms produced a measured wind gust of 64 mph at the South Haven GLERL site and to around 60 mph in Okemos near Lansing.
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 26, 6:51 AM EST, 1 hour 29 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND RAPIDS MI 751 AM EDT TUE AUG 26 2014 LATEST UPDATE... AVIATION .SYNOPSIS... ISSUED AT 325 AM EDT TUE AUG 26 2014 WARM AND HUMID CONDITIONS WILL CONTINUE TODAY WITH A CHANCE OF SHOWERS AND THUNDERSTORMS. THE BEST CHANCE OF THUNDERSTORMS WILL COME LATE THIS MORNING AND AFTERNOON NEAR TO SOUTHEAST OF A LINE FROM HOLLAND TO LANSING. A COOLER AND DRIER AIRMASS WILL MOVE IN TONIGHT THROUGH THURSDAY. HOWEVER IT WILL TURN WARMER AND MORE HUMID VERY LATE IN THE WEEK INTO NEXT WEEKEND WITH SCATTERED SHOWERS AND THUNDERSTORMS. && .SHORT TERM...(TODAY THROUGH THURSDAY) ISSUED AT 325 AM EDT TUE AUG 26 2014 PRIMARY SHORT TERM FORECAST CONCERNS INVOLVE DETERMINING CONVECTIVE POTENTIAL TODAY. THE COLD FRONT WILL MOVE THROUGH OUR FCST AREA FROM NW TO SE THIS MORNING AND AFTERNOON. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG AND JUST AHEAD OF THE FRONT MAINLY THIS AFTERNOON. GIVEN THE FRONTAL TIMING THE BEST CHANCE FOR SCATTERED SHOWERS AND STORMS WILL COME LATE THIS MORNING AND AFTERNOON OVER OUR SE FCST AREA NEAR TO MAINLY JUST SE OF KGRR OVER TOWARD LAN... BTL... AND JXN. THIS IS WHERE THERE IS POTENTIAL FOR SB CAPE VALUES TO REACH 2500-3000 J/KG BY EARLY AFTERNOON AS SUGGESTED BY 00Z NAM/GFS GUIDANCE. THE SEVERE WX THREAT TODAY IS FAIRLY LOW IN SPITE OF THE POTENTIALLY MODERATE TO STRONG INSTABILITY MAINLY BECAUSE OF WEAK DEEP LAYER SHEAR AND LACK OF STRONGER FORCING FROM THE FRONT. EVEN SO CANNOT RULE OUT ISOLATE SEVERE STORMS OVER OUR SE FCST AREA THIS AFTERNOON GIVEN POTENTIAL FOR STRONG INSTABILITY JUST AHEAD OF THE FRONT. A COOLER AND DRIER AIRMASS WILL ADVECT IN BEHIND THE FRONT TONIGHT THROUGH MIDWEEK. HAVE TRENDED THE FORECAST DRY FOR TONIGHT AFTER FROPA WITH DRY WX ANTICIPATED WEDNESDAY THROUGH THURSDAY AS A HIGH PRESSURE RIDGE BUILDS IN. PCPN TIED TO THE NEXT SYSTEM APPROACHING FROM THE WEST SHOULD HOLD OFF UNTIL THURSDAY NIGHT. .LONG TERM...(THURSDAY NIGHT THROUGH MONDAY) ISSUED AT 325 AM EDT TUE AUG 26 2014 OVERALL MODEL CONTINUITY IS FAIRLY GOOD TONIGHT BETWEEN THE GFS AND THE ECMWF. THERE IS SOME DIVERGENCE IS SOLUTIONS OUT ON SUNDAY AND MONDAY THOUGH. HAVE OPTED TO CONTINUE TO FOLLOW THE ECMWF HAS IT HAS HAD MUCH BETTER RUN TO RUN CONSISTENCY LATELY. ALSO THE GFS HAS BEEN CONVERGING TOWARDS ITS SOLUTIONS. FORECAST CONFIDENCE IS ONLY MEDIUM THOUGH GIVEN THE DISPARITY BETWEEN THE MODELS. THE LONG TERM STILL LOOKS LIKE A WET PERIOD AS A SURFACE BOUNDARY WILL BE OSCILLATING THROUGH THE AREA ALMOST THE ENTIRE TIME. A WARM FRONT SURGES NORTH THURSDAY NIGHT INTO FRIDAY...WITH THE ASSOCIATED COOL FRONT STALLING OUT OVER THE AREA SATURDAY INTO SUNDAY. THE ECMWF THEN PIVOTS A LOW THROUGH THE SOUTHERN GREAT LAKES INTO MONDAY. HAVE MAINLY CHANCE POPS RIGHT THROUGH THE LONG TERM PERIOD FOR SHOWERS AND STORMS. HEAVY RAINS ARE A DEFINITE POTENTIAL GIVEN THE REPEATED ROUNDS OF CONVECTION. WPC QFF FOR THE LONG TERM IS ON THE ORDER OF 1 TO 2 INCHES. TEMPERATURES THROUGH THE PERIOD SHOULD BE SEASONABLE...IN THE UPPER 70S TO NEAR 80 ON MOST DAYS FOR HIGHS. && .AVIATION...(FOR THE 12Z TAFS THROUGH 12Z WEDNESDAY MORNING) ISSUED AT 751 AM EDT TUE AUG 26 2014 STRATUS AND FOG DID NOT MATERIALIZE LIKE MOST OF THE LAST SEVERAL NIGHT SO FOCUS SHIFTS QUICKLY TO THUNDERSTORMS. SCATTERED SHOWERS AND STORMS ARE ALREADY ONGOING THIS MORNING...MAINLY WEST OF KAZO. A FRONTAL BOUNDARY IS FORECAST TO SLIDE SOUTHEAST THROUGH THE AREA TODAY SO KMKG WILL HAVE THE SHORTEST AND LEAST THREAT FROM STORMS. KJXN WILL HAVE THE BEST CHANCE AT SEEING STORMS. THE THREAT FOR STORMS SHOULD END AT KMKG BY 18Z-19Z AND DOWN AT KJXN TOWARDS 00Z. EXPECTING VFR CONDITIONS FOR THE MOST PART TODAY OUTSIDE OF THUNDERSTORMS WHERE BRIEF PERIODS OF MVFR OR IFR WILL OCCUR. THERE IS A BAND OF MVFR CEILINGS JUST BEHIND THE FRONT THIS MORNING OVER WISCONSIN BUT EXPECTING THIS TO LIFT WITH TIME TO VFR. WE WILL BE KEEPING AN EYE ON THIS THOUGH IN CASE THEY HOLD BELOW 3000FT. CONDITIONS SHOULD BE VFR AND DRY OVERNIGHT. && .MARINE... ISSUED AT 325 AM EDT TUE AUG 26 2014 WINDS AND WAVES WILL BE RELATIVELY LIGHT TODAY THROUGH MIDWEEK. HOWEVER PATCHY FOG WILL POSE A HAZARD TO MARINERS TODAY BEFORE A DRIER AIRMASS MOVES IN TONIGHT THROUGH MIDWEEK. && .HYDROLOGY... ISSUED AT 1101 PM EDT MON AUG 25 2014 A FEW THUNDERSTORMS COULD REDEVELOP OVERNIGHT...AND THUNDERSTORMS ARE ALSO POSSIBLE ON TUESDAY PRIMARILY EAST OF US-131. THESE STORMS WILL REMAIN ISOLATED TO SCATTERED IN NATURE AND WIDESPREAD HYDRO IMPACTS ARE NOT EXPECTED. STORMS COULD PRODUCE LOCALLY HEAVY RAINFALL. DRIER AIR MOVES IN LATE TUESDAY INTO WEDNESDAY. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...NONE. LM...NONE. && SYNOPSIS...LAURENS SHORT TERM...LAURENS LONG TERM...DUKE AVIATION...DUKE HYDROLOGY...EBW MARINE...LAURENS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 607 AM EDT TUE AUG 26 2014 MIZ037>040-043>046-050>052-056>059-064>067-071>074-271015- MASON-LAKE-OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON- MONTCALM-GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON- INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON- 607 AM EDT TUE AUG 26 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS ARE POSSIBLE TODAY GENERALLY SOUTHEAST OF A MUSKEGON TO MT. PLEASANT LINE. SOME OF THE STORMS MAY BECOME STRONG WITH WIND GUSTS IN EXCESS OF 50 MPH AND HAIL TO NEAR THREE QUARTERS OF AN INCH IN DIAMETER. LOCALLY HEAVY RAINS ARE ALSO A THREAT TODAY. STORMS WILL BE POSSIBLE FROM BEFORE DAYBREAK THROUGH ABOUT 800 PM. PATCHY DENSE FOG WILL BE POSSIBLE THIS MORNING THROUGH ABOUT 900 AM. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY OCCASIONAL THUNDERSTORMS WILL BE POSSIBLE FROM THURSDAY NIGHT THROUGH MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. LMZ844>849-271015- 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- 607 AM EDT TUE AUG 26 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS WILL BE POSSIBLE TODAY ESPECIALLY FOR AREAS SOUTH OF MUSKEGON. STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS IN EXCESS OF 35 KNOTS ALONG WITH HAIL AREAS OF FOG WILL BE POSSIBLE TODAY OUT ON THE LAKE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THUNDERSTORMS WILL BE POSSIBLE FROM THURSDAY NIGHT THROUGH MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. DUKE
The Grand Rapids radar (KGRR), 81 km away, was scanning. The volume nearest the first event began at 13:21 UTC.
2 thunderstorm wind, 1 lightning. Local standard time, as filed.
A measured peak wind gust of 64 mph occurred at the South Haven GLERL coastal observation site.
The media reported that South Shore middle school in Holland was struck by lightning. There were no injuries.
A trained spotter estimated that thunderstorm wind gusts reached 60 mph in Okemos.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2014Every state in 2014This day in weather historyWarnings in Michigan, August 2014
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: 535958, 535960, 535957.