A cold front brought isolated late afternoon and evening severe storms that produced large hail, heavy rain and frequent lightning as well as isolated reports of damaging wind gusts. The most severe weather occurred in Ovid in south central Michigan where baseball sized hail was reported in addition to several downed trees and power lines.
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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.
A cold front brought isolated late afternoon and evening severe storms that produced large hail, heavy rain and frequent lightning as well as isolated reports of damaging wind gusts. The most severe weather occurred in Ovid in south central Michigan where baseball sized hail was reported in addition to several downed trees and power lines.
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 Jun 12, 1:51 PM EST, 3 hours 21 minutes earlier.
Area Forecast Discussion National Weather Service Grand Rapids MI 251 PM EDT Sat Jun 12 2021 LATEST UPDATE... Synopsis/Discussion/Marine .SYNOPSIS... Issued at 250 PM EDT Sat Jun 12 2021 - Marginal Risk of severe thunderstorms today - Cooling off and drying out next week && .DISCUSSION...(This evening through next Saturday) Issued at 250 PM EDT Sat Jun 12 2021 - Marginal Risk of severe thunderstorms today Showers and thunderstorms have initiated across the far northeast forecast area this afternoon and will continue to go up along and ahead of the sfc trough/cold front into this evening. We expect expanding coverage and intensity of storms as they move east into LIs of minus 5 to minus 7 and over 2000 J/kg CAPE along with about 25 to 30 knots of deep layer shear. Expect a few strong to severe storms reaching Mount Pleasant to Lansing by late afternoon and early evening. Main threat will be areas of wind damage due to wet microburst potential as model soundings indicate dry air entrainment by updrafts will produce DCAPE values similar to what occurred yesterday. Marginal shear values could limit the longevity of any cold pool-driven linear convection, also similar to yesterday, so that multicell clusters of pulsing storms will be the dominant storm mode again. The storms should be exiting our eastern border around 9 to 10 pm. - Cooling off next week, with a couple chances for showers Upper troughing will be setting up across the Great Lakes as the western CONUS heights rise next week. Showers are expected Sunday night as a shortwave trough drives a cold front through with drier and cooler weather to follow as a Canadian anticyclone builds in. Dew points will be falling and low temperatures in the 40s are possible by Wednesday morning. Dry weather should prevail until Thursday night when northern stream shortwave trough tops the western ridge and a sfc cold front pushes into the central Great Lakes bringing the chance of showers, lingering into early Friday. && .AVIATION...(For the 18Z TAFS through 18Z Sunday afternoon) Issued at 137 PM EDT Sat Jun 12 2021 VFR conditions will prevail through the afternoon then some areas of MVFR and isolated IFR are expected in thunderstorms after 20Z from GRR to AZO. The storms will move east to JXN and LAN by around 00Z. Wind gusts over 50 knots are possible with the strongest storms, but 30 to 40 knot winds will be more common and could be affecting JXN and LAN. VFR conditions can be expected later tonight after the storms are over with northwest winds AOB 10 knots. && .MARINE... Issued at 250 PM EDT Sat Jun 12 2021 Winds and waves should remain relatively light this weekend then increase on Monday and Tuesday in northerly flow. Marine fog looks to be mixing out this afternoon and drier air moving in from the west should prevent fog from reforming overnight && .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 434 AM EDT Sat Jun 12 2021 MIZ037>040-043>046-050>052-056>059-064>067-071>074-130845- Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon- Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton- Ingham-Van Buren-Kalamazoo-Calhoun-Jackson- 434 AM EDT Sat Jun 12 2021 This hazardous weather outlook is for portions of southwest Lower Michigan. .DAY ONE...Today and Tonight There is a threat today of isolated severe weather along the U.S. Highway 127 corridor. The best chance would be from Lansing north through Alma, Mt. Pleasant, Clare and Harrison. All storms today will be capable of lightning, locally heavy rain, wind gusts to 35 mph and small hail. The strongest of storms will be capable of wind gusts to around 60 mph and 1 inch hail. The time frame of concern will be from 300pm through 1000pm. .DAYS TWO THROUGH SEVEN...Sunday through Friday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. LMZ844>849-130845- 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- 434 AM EDT Sat Jun 12 2021 This hazardous weather outlook is for portions of southwest Lower Michigan. .DAY ONE...Today and Tonight Areas of fog are possible on Lake Michigan today into tonight. .DAYS TWO THROUGH SEVEN...Sunday through Friday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. DUKE
Special Weather Statement
National Weather Service Grand Rapids MI
354 PM EDT Sat Jun 12 2021
MIZ040-045-046-051-122100-
Montcalm-Isabella-Mecosta-Clare-
354 PM EDT Sat Jun 12 2021
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT ISABELLA...CLARE...
EASTERN MECOSTA AND NORTHEASTERN MONTCALM COUNTIES...
At 353 PM EDT, radar indicated strong thunderstorms were located
along a line extending from 5 miles northeast of Harrison to near
Farwell to near Mecosta. Movement was southeast at 25 mph.
Wind gusts of 50 to 55 mph and pea size hail are possible with these
storms.
Locations impacted include...
Mount Pleasant... Clare... Shepherd...
Farwell... Mecosta... Rosebush...
Canadian Lakes... Lake Isabella... Harrison...
Remus... Millbrook... Lake...
Barryton... Brinton... Cedar Lake...
Vestaburg... Wyman... Delwin...
Winn... Loomis...
Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 4413 8461 4353 8461 4347 8472 4346 8484
4339 8485 4336 8490 4362 8540 4385 8503
4416 8477
TIME...MOT...LOC 1953Z 296DEG 22KT 4408 8473 4382 8495 4364 8525
OSTUNOThe Detroit radar (KDTX), 81 km away, was scanning. The volume nearest the first event began at 22:09 UTC.
2 hail, 1 thunderstorm wind. Local standard time, as filed.
A trained spotter measured baseball sized hail in Ovid and also reported that several trees and wires were blown down.
The public reported estimated wind gusts to 60 mph northwest of Lansing.
The public reported one inch diameter hail.
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, June 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: 953775, 953777, 953776.