Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 27, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 7, 2021, 12:54 PM EDT for Clinton County, Gratiot County, Michigan. It was in force for 66 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
- Jul 7, 2021, 12:54 PM EDT (16:54 UTC)
- Expired
- Jul 7, 2021, 2:00 PM EDT
- In force
- 66 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
The radar
The Grand Rapids radar (KGRR), 80 km from the middle of the area, began a volume at 16:54 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, 4.9 hours before the alert went out and 110 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
- 1092 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 779 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.2
The text
As transmitted.
711
WUUS53 KGRR 071654
SVRGRR
MIC037-057-071800-
/O.NEW.KGRR.SV.W.0027.210707T1654Z-210707T1800Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
1254 PM EDT Wed Jul 7 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Southern Gratiot County in central Michigan...
Northern Clinton County in south central Michigan...
* Until 200 PM EDT.
* At 1254 PM EDT, a severe thunderstorm was located 8 miles east of
Carson City, or 10 miles southwest of Ithaca, 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...
Ithaca... Elsie... Eureka...
North Star... Maple Rapids... Ashley...
Perrinton... Pompeii... Middleton...
Bannister...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4307 8481 4325 8481 4340 8437 4307 8437
TIME...MOT...LOC 1654Z 256DEG 23KT 4315 8469
HAIL...1.00IN
WIND...60MPH
$$
NJJ2 follow-up statements
862
WWUS53 KGRR 071707
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
107 PM EDT Wed Jul 7 2021
MIC037-057-071800-
/O.CON.KGRR.SV.W.0027.000000T0000Z-210707T1800Z/
Gratiot MI-Clinton MI-
107 PM EDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM EDT
FOR SOUTHERN GRATIOT AND NORTHERN CLINTON COUNTIES...
At 107 PM EDT, a severe thunderstorm was located 8 miles north of St.
Johns, moving east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Ithaca... Elsie... Eureka...
North Star... Maple Rapids... Ashley...
Perrinton... Pompeii... Middleton...
Bannister...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4307 8481 4325 8481 4340 8437 4307 8437
TIME...MOT...LOC 1707Z 264DEG 22KT 4312 8458
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
NJJ962
WWUS53 KGRR 071757
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
157 PM EDT Wed Jul 7 2021
MIC037-057-071807-
/O.EXP.KGRR.SV.W.0027.000000T0000Z-210707T1800Z/
Gratiot MI-Clinton MI-
157 PM EDT Wed Jul 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN GRATIOT AND NORTHERN
CLINTON COUNTIES WILL EXPIRE AT 200 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
south central Michigan.
LAT...LON 4307 8481 4325 8481 4340 8437 4307 8437
TIME...MOT...LOC 1757Z 256DEG 23KT 4320 8416
$$
NJJThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 8:28 PM EDT | Areal Flood Warning | GRR | Mecosta, Newaygo | 6 hr |
| Jul 6, 9:21 PM EDT | Special Weather Statement | GRR | Clare, Isabella, Mecosta, Montcalm, Osceola | 54 min |
| Jul 7, 12:13 PM EDT | Special Weather Statement | GRR | Allegan, Barry, Calhoun, Clinton, Eaton, Gratiot and 11 more | 4 hr |
| Jul 7, 1:18 PM EDT | Tornado Warning | GRR | Clinton, Gratiot | 27 min |
| Jul 7, 1:45 PM EDT | Severe Thunderstorm Warning | GRR | Clinton | 13 min |
| Jul 7, 2:37 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Jackson | 38 min |
| Jul 7, 2:59 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Eaton, Ingham, Jackson | 77 min |
| Jul 7, 4:01 PM EDT | Special Weather Statement | GRR | Clare, Lake, Osceola | 119 min |
| Jul 7, 4:15 PM EDT | Areal Flood Advisory | GRR | Calhoun | 2 hr |
| Jul 7, 5:06 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun | 24 min |
| Jul 7, 5:12 PM EDT | Special Weather Statement | GRR | Calhoun, Eaton, Ingham, Jackson | 2 hr |
| Jul 7, 5:18 PM EDT | Severe Thunderstorm Warning | GRR | Ingham | 27 min |
| Jul 7, 5:33 PM EDT | Areal Flood Advisory | GRR | Lake, Osceola | 4 hr |
| Jul 7, 6:03 PM EDT | Special Weather Statement | GRR | Clare, Lake, Osceola | 117 min |
| Jul 7, 6:17 PM EDT | Special Weather Statement | GRR | Clinton | 58 min |
| Jul 7, 6:44 PM EDT | Special Weather Statement | GRR | Barry | 31 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.