Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 4, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 12, 2021, 5:44 PM EDT for Clinton County, Gratiot County, Montcalm County, Michigan. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 12, 2021, 5:44 PM EDT (21:44 UTC)
- Expired
- Jun 12, 2021, 6:30 PM EDT
- In force
- 46 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Clinton County, MI, Gratiot County, MI, Montcalm County, MI
The radar
The Grand Rapids radar (KGRR), 78 km from the middle of the area, began a volume at 21:44 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 9.7 hours before the alert went out and 116 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 5 J/kg
- Mixed-layer CIN
- -240 J/kg
- Mixed-layer LCL
- 714 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
564
WUUS53 KGRR 122144
SVRGRR
MIC037-057-117-122230-
/O.NEW.KGRR.SV.W.0004.210612T2144Z-210612T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
544 PM EDT Sat Jun 12 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Gratiot County in central Michigan...
Northeastern Clinton County in south central Michigan...
Eastern Montcalm County in central Michigan...
* Until 630 PM EDT.
* At 543 PM EDT, a severe thunderstorm was located near Elsie, or 11
miles northeast of St. Johns, moving southeast at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Alma... St. Johns... Ithaca...
St. Louis... Breckenridge... Carson City...
Elsie... Eureka... Crystal...
Sumner... Ovid... North Star...
Maple Rapids... Ashley... Perrinton...
Elm Hall... Cedar Lake... Bannister...
Vestaburg... Pompeii...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4312 8483 4312 8503 4343 8502 4341 8439
4339 8437 4290 8437
TIME...MOT...LOC 2143Z 306DEG 48KT 4314 8441
HAIL...1.00IN
WIND...60MPH
$$
WDM4 follow-up statements
984
WWUS53 KGRR 122151
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
551 PM EDT Sat Jun 12 2021
MIC037-057-117-122230-
/O.CON.KGRR.SV.W.0004.000000T0000Z-210612T2230Z/
Gratiot MI-Clinton MI-Montcalm MI-
551 PM EDT Sat Jun 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR GRATIOT...NORTHEASTERN CLINTON AND EASTERN MONTCALM COUNTIES...
At 551 PM EDT, a severe thunderstorm was located near Elsie, or 11
miles northeast of St. Johns, moving southeast at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Alma... St. Johns... Ithaca...
St. Louis... Breckenridge... Carson City...
Elsie... Eureka... Crystal...
Sumner... Ovid... North Star...
Maple Rapids... Ashley... Perrinton...
Elm Hall... Cedar Lake... Bannister...
Vestaburg... Pompeii...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
&&
LAT...LON 4312 8483 4312 8503 4343 8502 4341 8439
4339 8437 4290 8437
TIME...MOT...LOC 2151Z 309DEG 14KT 4315 8446
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
WDM758
WWUS53 KGRR 122207
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
607 PM EDT Sat Jun 12 2021
MIC037-057-117-122230-
/O.CON.KGRR.SV.W.0004.000000T0000Z-210612T2230Z/
Gratiot MI-Clinton MI-Montcalm MI-
607 PM EDT Sat Jun 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR GRATIOT...NORTHEASTERN CLINTON AND EASTERN MONTCALM COUNTIES...
At 607 PM EDT, a severe thunderstorm was located near Owosso, moving
southeast at 55 mph.
This is a very dangerous storm.
HAZARD...Baseball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be severely injured.
Expect shattered windows, extensive damage to roofs,
siding, and vehicles.
Locations impacted include...
Alma... St. Johns... Ithaca...
St. Louis... Breckenridge... Carson City...
Elsie... Eureka... Crystal...
Sumner... Ovid... North Star...
Maple Rapids... Ashley... Perrinton...
Elm Hall... Cedar Lake... Bannister...
Vestaburg... Pompeii...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
&&
LAT...LON 4312 8483 4312 8503 4343 8502 4341 8439
4339 8437 4290 8437
TIME...MOT...LOC 2207Z 306DEG 48KT 4302 8422
TORNADO...POSSIBLE
HAIL...2.75IN
WIND...60MPH
$$
WDM283
WWUS53 KGRR 122223
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
623 PM EDT Sat Jun 12 2021
MIC037-057-117-122230-
/O.CON.KGRR.SV.W.0004.000000T0000Z-210612T2230Z/
Gratiot MI-Clinton MI-Montcalm MI-
623 PM EDT Sat Jun 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR GRATIOT...NORTHEASTERN CLINTON AND EASTERN MONTCALM COUNTIES...
At 622 PM EDT, a severe thunderstorm was located over Durand, moving
southeast at 35 mph.
This is a very dangerous storm.
HAZARD...Baseball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be severely injured.
Expect shattered windows, extensive damage to roofs,
siding, and vehicles.
Locations impacted include...
Alma... St. Johns... Ithaca...
St. Louis... Breckenridge... Carson City...
Elsie... Eureka... Crystal...
Sumner... Ovid... North Star...
Maple Rapids... Ashley... Perrinton...
Elm Hall... Cedar Lake... Bannister...
Vestaburg... Pompeii...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
&&
LAT...LON 4312 8483 4312 8503 4343 8502 4341 8439
4339 8437 4290 8437
TIME...MOT...LOC 2222Z 306DEG 48KT 4289 8398
TORNADO...POSSIBLE
HAIL...2.75IN
WIND...60MPH
$$
WDM964
WWUS53 KGRR 122224
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
624 PM EDT Sat Jun 12 2021
MIC037-057-117-122234-
/O.EXP.KGRR.SV.W.0004.000000T0000Z-210612T2230Z/
Gratiot MI-Clinton MI-Montcalm MI-
624 PM EDT Sat Jun 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR GRATIOT...NORTHEASTERN CLINTON
AND EASTERN MONTCALM COUNTIES WILL EXPIRE AT 630 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Grand Rapids.
LAT...LON 4312 8483 4312 8503 4343 8502 4341 8439
4339 8437 4290 8437
TIME...MOT...LOC 2224Z 306DEG 48KT 4290 8400
$$
WDMThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 3:54 PM EDT | Special Weather Statement | GRR | Clare, Isabella, Mecosta | 66 min |
| Jun 12, 4:36 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot, Isabella | 39 min |
| Jun 12, 6:37 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Ingham | 38 min |
| Jun 12, 6:45 PM EDT | Severe Thunderstorm Warning | GRR | Clare, Osceola | 30 min |
| Jun 12, 7:43 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot, Isabella, Mecosta, Montcalm | 47 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 2021Every severe thunderstorm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.