Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 5, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 12, 2021, 6:37 PM EDT for Clinton County, Ingham County, Michigan. It was in force for 38 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, 6:37 PM EDT (22:37 UTC)
- Expired
- Jun 12, 2021, 7:15 PM EDT
- In force
- 38 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 2.75 in
- Wind
- 60.0 mph
Counties Clinton County, MI, Ingham County, MI
The radar
The Detroit radar (KDTX), 68 km from the middle of the area, began a volume at 22:36 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, 10.6 hours before the alert went out and 71 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.
889
WUUS53 KGRR 122237
SVRGRR
MIC037-065-122315-
/O.NEW.KGRR.SV.W.0005.210612T2237Z-210612T2315Z/
BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
637 PM EDT Sat Jun 12 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Eastern Ingham County in south central Michigan...
Southeastern Clinton County in south central Michigan...
* Until 715 PM EDT.
* At 636 PM EDT, a severe thunderstorm was located near Laingsburg,
moving south 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...
Williamston... Stockbridge... Webberville...
Dansville... Fitchburg... Bell Oak...
Haslett... Okemos...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
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.
This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!
&&
LAT...LON 4243 8429 4296 8450 4298 8437 4278 8436
4278 8416 4242 8414
TIME...MOT...LOC 2236Z 342DEG 31KT 4286 8429
TORNADO...POSSIBLE
HAIL...2.75IN
WIND...60MPH
$$
WDM2 follow-up statements
973
WWUS53 KGRR 122259
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
659 PM EDT Sat Jun 12 2021
MIC037-122308-
/O.CAN.KGRR.SV.W.0005.000000T0000Z-210612T2315Z/
Clinton MI-
659 PM EDT Sat Jun 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLINTON COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning moved out of the
warned area. Therefore, the warning has been cancelled.
LAT...LON 4243 8429 4277 8442 4277 8437 4278 8436
4278 8416 4242 8414
TIME...MOT...LOC 2258Z 342DEG 31KT 4268 8421
$$
MIC065-122315-
/O.CON.KGRR.SV.W.0005.000000T0000Z-210612T2315Z/
Ingham MI-
659 PM EDT Sat Jun 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR EASTERN INGHAM COUNTY...
At 658 PM EDT, a severe thunderstorm was located near Williamston, or
6 miles west of Fowlerville, moving south 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...
Williamston... Stockbridge... Webberville...
Dansville... Fitchburg... Bell Oak...
Haslett... Okemos...
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.
This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.
&&
LAT...LON 4243 8429 4277 8442 4277 8437 4278 8436
4278 8416 4242 8414
TIME...MOT...LOC 2258Z 342DEG 31KT 4268 8421
HAIL...2.75IN
WIND...60MPH
$$
WDM275
WWUS53 KGRR 122318
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
718 PM EDT Sat Jun 12 2021
MIC065-122327-
/O.EXP.KGRR.SV.W.0005.000000T0000Z-210612T2315Z/
Ingham MI-
718 PM EDT Sat Jun 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN INGHAM COUNTY HAS
EXPIRED...
The storm which prompted the warning has weakened below severe
limits. Therefore, the warning has been allowed to expire. However,
small hail, gusty winds and lightning are still possible with this
thunderstorm.
LAT...LON 4243 8429 4277 8442 4277 8437 4278 8436
4278 8416 4242 8414
TIME...MOT...LOC 2317Z 342DEG 31KT 4253 8414
$$
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, 6:45 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.