Severe storms produced damaging wind gusts and heavy rain across portions of Jackson county during the early morning hours of August 12th.
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 episode as NWS GRR wrote it up.
Severe storms produced damaging wind gusts and heavy rain across portions of Jackson county during the early morning hours of August 12th.
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, 2:35 AM EST, 2 hours 50 minutes earlier.
Area Forecast Discussion National Weather Service Grand Rapids MI 335 AM EDT Thu Aug 12 2021 LATEST UPDATE... Synopsis/Discussion/Marine .SYNOPSIS... Issued at 335 AM EDT Thu Aug 12 2021 - One more round of showers and storms tonight - Finally drying out for the weekend && .DISCUSSION...(Today through next Wednesday) Issued at 335 AM EDT Thu Aug 12 2021 - One more round of showers and storms tonight Latest batch of storms continues to drop heavy rain across the Lansing area. Flood advisory currently in effect and we will upgrade to a warning given continued rain over the next hour exacerbating flooding of roads and highways. Storms will continue to affect the southeast forecast area into this morning although the severe weather threat is minimal given the airmass has been worked over by previous rounds of convection. Expect a break in the action for all but the far south of Lower Michigan this afternoon then one more round of storms is expected along the cold front tonight. Some bowing line segments and taller updrafts should bring isolated, marginal threat for severe and ending Friday morning. - Finally drying out for the weekend Dew points fall from the 70s to the 50s and lovely summer weather is in store for the weekend. Return flow beings next week with increasing chances for showers and thunderstorms by Wednesday. Recurving tropical cyclone or its remnants should stay east of the Great Lakes.&& .AVIATION...(For the 06Z TAFS through 06Z Thursday night) Issued at 150 AM EDT Thu Aug 12 2021 Scattered showers and thunderstorms will bring areas of IFR overnight but most places will stay VFR. Another round of storms is possible in the afternoon but confidence on timing and coverage means we will leave out of the forecast for now. LLWS will be present into the morning. && .MARINE... Issued at 335 AM EDT Thu Aug 12 2021 Conditions will be marginal for a Small Craft Advisory today and we will hold off issuing one for now. Southwest winds may gust over 20 knots into this afternoon and waves will be 2 to 4 feet for the most part. A cold front will bring some thunderstorms tonight then winds will go northwest behind the front. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...None. LM...None. && SYNOPSIS...Ostuno DISCUSSION...Ostuno AVIATION...Ostuno MARINE...Ostuno
Hazardous Weather Outlook National Weather Service Grand Rapids MI 431 AM EDT Thu Aug 12 2021 LMZ844>849-MIZ037>040-043>046-050>052-056>059-064>067-071>074- 130845- 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-Mason-Lake- Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon-Montcalm- Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton-Ingham- Van Buren-Kalamazoo-Calhoun-Jackson- 431 AM EDT Thu Aug 12 2021 This hazardous weather outlook is for portions of southwest Lower Michigan. .DAY ONE...Today and Tonight Heavy rain will bring localized flooding this morning. There will be flooded roads in the Lansing area. There is a marginal risk of severe weather for this evening and overnight as storms form along a cold front moving southeast through Lower Michigan. The main threat will be for isolated damaging winds. .DAYS TWO THROUGH SEVEN...Friday through Wednesday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed tonight.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
139 AM EDT THU AUG 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0130 AM HEAVY RAIN 3 ENE SANDSTONE 42.27N 84.47W
08/12/2021 M3.04 INCH JACKSON MI ASOS
ASOS STATION KJXN JACKSON COUNTY-REYNOLDS
FIELD AIRPORT.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
145 AM EDT THU AUG 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0100 AM HEAVY RAIN EAST GRAND RAPIDS 42.95N 85.61W
08/12/2021 M1.26 INCH KENT MI CO-OP OBSERVER
18 HOUR TOTAL.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
209 AM EDT THU AUG 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0143 AM FLOOD 1 NE LANSING 42.72N 84.54W
08/12/2021 INGHAM MI BROADCAST MEDIA
WATER OVER THE ROADWAY WITH SOUTH
PENNSYLVANIA CLOSED SOUTH OF HAZEL AND GRAND
RIVER CLOSED AT CLIPPERT.
&&Special Weather Statement
National Weather Service Grand Rapids MI
439 AM EDT Thu Aug 12 2021
MIZ066-067-073-074-120945-
Ingham MI-Calhoun MI-Eaton MI-Jackson MI-
439 AM EDT Thu Aug 12 2021
...Strong thunderstorms will impact portions of northeastern Calhoun,
northern Jackson, Ingham and Eaton Counties through 545 AM EDT...
At 438 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 5 miles north of Williamston to near Leslie.
Movement was east at 60 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Lansing... Charlotte... Mason...
Eaton Rapids... East Lansing... Grand Ledge...
Williamston... Potterville... Leslie...
Stockbridge... Edgemont Park... Aurelius...
Onondaga... Bunker Hill... Brookfield...
Webberville... Dimondale... Springport...
Dansville... Mulliken...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4233 8489 4277 8496 4278 8416 4236 8413
TIME...MOT...LOC 0838Z 247DEG 52KT 4277 8432 4251 8439
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
JCPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
443 AM EDT THU AUG 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0443 AM HEAVY RAIN HASTINGS 42.65N 85.29W
08/12/2021 M2.40 INCH BARRY MI CO-OP OBSERVER
&&Special Weather Statement
National Weather Service Grand Rapids MI
609 AM EDT Thu Aug 12 2021
MIZ072>074-121115-
Kalamazoo MI-Calhoun MI-Jackson MI-
609 AM EDT Thu Aug 12 2021
...Strong thunderstorms will impact portions of Calhoun, western
Jackson and eastern Kalamazoo Counties through 715 AM EDT...
At 608 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Vicksburg to near Union City to near Quincy.
Movement was north at 20 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Albion... Marshall... Battle Creek...
Vicksburg... Galesburg... Homer...
Union City... Climax... Richland...
Burlington... Brownlee Park... Level Park-Oak Park...
Gull Lake... Fulton... Marengo...
Concord... Athens... Augusta...
Springport... Parma...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4241 8544 4242 8448 4207 8469 4207 8557
TIME...MOT...LOC 1008Z 200DEG 16KT 4211 8554 4204 8515 4190 8492
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
JCThe Detroit radar (KDTX), 109 km away, was scanning. The volume nearest the first event began at 10:24 UTC.
2 thunderstorm wind. Local standard time, as filed.
Several trees were uprooted and snapped off along a five mile path along Moscow road.
There were numerous reports of downed, snapped and uprooted trees.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2021Every state in 2021This day in weather historyWarnings in Michigan, August 2021
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: 973850, 973851.