Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 6, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 12, 2021, 6:45 PM EDT for Clare County, Osceola County, Michigan. It was in force for 30 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, 6:45 PM EDT (22:45 UTC)
- Expired
- Jun 12, 2021, 7:15 PM EDT
- In force
- 30 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
Counties Clare County, MI, Osceola County, MI
The radar
The NCL Michigan radar (KAPX), 99 km from the middle of the area, began a volume at 22:44 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, 10.8 hours before the alert went out and 182 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.
451
WUUS53 KGRR 122245
SVRGRR
MIC035-133-122315-
/O.NEW.KGRR.SV.W.0006.210612T2245Z-210612T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
645 PM EDT Sat Jun 12 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Clare County in central Michigan...
Northeastern Osceola County in central Michigan...
* Until 715 PM EDT.
* At 645 PM EDT, a severe thunderstorm was located near Roscommon
Township, or 10 miles south of Prudenville, moving southeast at 40
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...
Clare... Marion... Farwell...
Harrison... Lake George... Temple...
Long Lake... Leota...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4416 8461 4381 8461 4381 8487 4416 8528
TIME...MOT...LOC 2245Z 318DEG 33KT 4415 8472
HAIL...1.75IN
WIND...60MPH
$$
WDM2 follow-up statements
882
WWUS53 KGRR 122305
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
705 PM EDT Sat Jun 12 2021
MIC133-122314-
/O.CAN.KGRR.SV.W.0006.000000T0000Z-210612T2315Z/
Osceola MI-
705 PM EDT Sat Jun 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OSCEOLA COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4394 8461 4398 8484 4400 8483 4416 8486
4416 8461
TIME...MOT...LOC 2304Z 318DEG 33KT 4402 8455
$$
MIC035-122315-
/O.CON.KGRR.SV.W.0006.000000T0000Z-210612T2315Z/
Clare MI-
705 PM EDT Sat Jun 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTHEASTERN CLARE COUNTY...
At 704 PM EDT, a severe thunderstorm was located near Gladwin, moving
southeast at 40 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...
Harrison... Long Lake...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4394 8461 4398 8484 4400 8483 4416 8486
4416 8461
TIME...MOT...LOC 2304Z 318DEG 33KT 4402 8455
HAIL...1.75IN
WIND...60MPH
$$
WDM585
WWUS53 KGRR 122319
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
719 PM EDT Sat Jun 12 2021
MIC035-122328-
/O.EXP.KGRR.SV.W.0006.000000T0000Z-210612T2315Z/
Clare MI-
719 PM EDT Sat Jun 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CLARE COUNTY HAS
EXPIRED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire. However, small
hail, gusty winds and lightning are still possible with this
thunderstorm.
LAT...LON 4394 8461 4398 8484 4400 8483 4416 8486
4416 8461
TIME...MOT...LOC 2318Z 318DEG 33KT 4394 8445
$$
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, 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.