Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 7, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 12, 2021, 7:43 PM EDT for 4 counties in Michigan. It was in force for 47 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 12, 2021, 7:43 PM EDT (23:43 UTC)
- Expired
- Jun 12, 2021, 8:30 PM EDT
- In force
- 47 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
Counties Gratiot County, MI, Isabella County, MI, Mecosta County, MI, Montcalm County, MI
The radar
The Grand Rapids radar (KGRR), 84 km from the middle of the area, began a volume at 23:43 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 12, 7:45 PM EDT | TSTM WND DMG | Sheridan, MI | DOWNED TREES AND POWER LINES. |
| Jun 12, 8:20 PM EDT | TSTM WND DMG | 1 W Carson City, MI | DOWNED TREES AND POWER LINES. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 11.7 hours before the alert went out and 124 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.
999
WUUS53 KGRR 122343
SVRGRR
MIC057-073-107-117-130030-
/O.NEW.KGRR.SV.W.0007.210612T2343Z-210613T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
743 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...
Southern Isabella County in central Michigan...
Southeastern Mecosta County in central Michigan...
Eastern Montcalm County in central Michigan...
* Until 830 PM EDT.
* At 743 PM EDT, a severe thunderstorm was located 6 miles northeast
of Edmore, or 11 miles southwest of Mount Pleasant, moving
southeast at 35 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* Locations impacted include...
Alma... Ithaca... Stanton...
St. Louis... Shepherd... Breckenridge...
Edmore... Carson City... Wheeler...
Crystal... Sidney... Sumner...
Remus... Millbrook... North Star...
Sheridan... Ashley... Perrinton...
McBride... Westville...
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 immediately to shelter inside a strong building. Stay
away from windows.
&&
LAT...LON 4312 8440 4313 8484 4323 8517 4366 8521
4351 8460 4347 8460 4346 8439
TIME...MOT...LOC 2343Z 292DEG 29KT 4347 8493
HAIL...1.75IN
WIND...60MPH
$$
WDM3 follow-up statements
597
WWUS53 KGRR 122352
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
752 PM EDT Sat Jun 12 2021
MIC107-130000-
/O.CAN.KGRR.SV.W.0007.000000T0000Z-210613T0030Z/
Mecosta MI-
752 PM EDT Sat Jun 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MECOSTA COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4312 8440 4313 8484 4322 8514 4347 8511
4347 8508 4360 8509 4351 8460 4347 8460
4346 8439
TIME...MOT...LOC 2350Z 286DEG 20KT 4349 8495
$$
MIC057-073-117-130030-
/O.CON.KGRR.SV.W.0007.000000T0000Z-210613T0030Z/
Gratiot MI-Isabella MI-Montcalm MI-
752 PM EDT Sat Jun 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR GRATIOT...SOUTHERN ISABELLA AND EASTERN MONTCALM COUNTIES...
At 750 PM EDT, a severe thunderstorm was located 7 miles northeast
of Edmore, or 11 miles southwest of Mount Pleasant. Another severe
storm was located southeast of Stanton. Both storms were moving east
at 25 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... Ithaca... Stanton...
St. Louis... Shepherd... Breckenridge...
Edmore... Carson City... Wheeler...
Crystal... Sidney... Sumner...
North Star... Sheridan... Ashley...
Perrinton... McBride... Westville...
Elm Hall... Cedar Lake...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4312 8440 4313 8484 4322 8514 4347 8511
4347 8508 4360 8509 4351 8460 4347 8460
4346 8439
TIME...MOT...LOC 2350Z 286DEG 20KT 4349 8495
HAIL...1.00IN
WIND...60MPH
$$
TJT867
WWUS53 KGRR 130006
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
806 PM EDT Sat Jun 12 2021
MIC073-130015-
/O.CAN.KGRR.SV.W.0007.000000T0000Z-210613T0030Z/
Isabella MI-
806 PM EDT Sat Jun 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ISABELLA COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning moved out of the
warned area. Therefore, the warning has been cancelled.
LAT...LON 4312 8440 4313 8484 4320 8507 4346 8500
4347 8462 4346 8439
TIME...MOT...LOC 0005Z 319DEG 25KT 4340 8489
$$
MIC057-117-130030-
/O.CON.KGRR.SV.W.0007.000000T0000Z-210613T0030Z/
Gratiot MI-Montcalm MI-
806 PM EDT Sat Jun 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR GRATIOT AND EASTERN MONTCALM COUNTIES...
At 805 PM EDT, a severe thunderstorm was located 7 miles east of
Edmore, or 11 miles west of Alma. Another severe storm was located
just northwest of Carson City. Both storms were moving southeast at
30 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... Ithaca... St. Louis...
Breckenridge... Carson City... Wheeler...
Crystal... Sumner... North Star...
Sheridan... Ashley... Perrinton...
Elm Hall... Cedar Lake... Bannister...
Vestaburg... Forest Hill... Pompeii...
Riverdale... Middleton...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4312 8440 4313 8484 4320 8507 4346 8500
4347 8462 4346 8439
TIME...MOT...LOC 0005Z 319DEG 25KT 4340 8489
HAIL...1.00IN
WIND...60MPH
$$
TJT323
WWUS53 KGRR 130025
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
825 PM EDT Sat Jun 12 2021
MIC057-117-130032-
/O.EXP.KGRR.SV.W.0007.000000T0000Z-210613T0030Z/
Gratiot MI-Montcalm MI-
825 PM EDT Sat Jun 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR GRATIOT AND EASTERN MONTCALM
COUNTIES WILL EXPIRE AT 830 PM EDT...
The storm near Alma that prompted the warning has weakened below
severe limits. A severe thunderstorm south of Carson City will move
southeast out of Gratiot County. Therefore, the warning will be
allowed to expire. However, small hail, gusty winds and lightning
are still possible with any remaining thunderstorms in the area.
LAT...LON 4312 8440 4313 8484 4320 8507 4346 8500
4347 8462 4346 8439
TIME...MOT...LOC 0022Z 292DEG 29KT 4336 8475
$$
TJTThe 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, 5:44 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Gratiot, Montcalm | 46 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 |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.