Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 84, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Sep 7, 2021, 2:20 PM EDT for Isabella County, Mecosta County, Newaygo County, Michigan. It was in force for 55 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
- Sep 7, 2021, 2:20 PM EDT (18:20 UTC)
- Expired
- Sep 7, 2021, 3:15 PM EDT
- In force
- 55 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Isabella County, MI, Mecosta County, MI, Newaygo County, MI
The radar
The Grand Rapids radar (KGRR), 76 km from the middle of the area, began a volume at 18:20 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 |
|---|---|---|---|
| Sep 7, 2:38 PM EDT | TSTM WND DMG | 1 S Mount Pleasant, MI | PHOTO OF LIMBS DOWN ON CMU CAMPUS...RELATED VIA SOCIAL MEDIA. TIME ESTIMATED FROM RADAR. |
| Sep 7, 3:15 PM EDT | TSTM WND GST 43 | 3 Ene Mount Pleasant, MI | AWOS STATION KMOP MT PLEASANT MUNI ARPT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 7, 12:21 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 6.3 hours before the alert went out and 193 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1621 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 150 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
935
WUUS53 KGRR 071820
SVRGRR
MIC073-107-123-071915-
/O.NEW.KGRR.SV.W.0084.210907T1820Z-210907T1915Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
220 PM EDT Tue Sep 7 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Newaygo County in west central Michigan...
Isabella County in central Michigan...
Mecosta County in central Michigan...
* Until 315 PM EDT.
* At 219 PM EDT, a severe thunderstorm was located over White Cloud,
moving east at 65 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Mount Pleasant... Big Rapids... Clare...
Newaygo... White Cloud... Fremont...
Shepherd... Hesperia... Grant...
Morley... Mecosta... Rosebush...
Canadian Lakes... Lake Isabella... Croton...
Bridgeton... Remus... Millbrook...
Paris... Barryton...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4373 8603 4382 8558 4381 8461 4347 8461
4347 8556 4330 8556 4330 8604
TIME...MOT...LOC 1819Z 267DEG 55KT 4354 8575
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
HOVING3 follow-up statements
836
WWUS53 KGRR 071841
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
241 PM EDT Tue Sep 7 2021
MIC073-107-123-071915-
/O.CON.KGRR.SV.W.0084.000000T0000Z-210907T1915Z/
Newaygo MI-Isabella MI-Mecosta MI-
241 PM EDT Tue Sep 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR SOUTHERN NEWAYGO...ISABELLA AND MECOSTA COUNTIES...
At 241 PM EDT, severe thunderstorms were located along a line
extending from near Clare to near Canadian Lakes to near Grant,
moving east at 50 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Mount Pleasant... Big Rapids... Clare...
Newaygo... White Cloud... Fremont...
Shepherd... Grant... Morley...
Mecosta... Rosebush... Canadian Lakes...
Lake Isabella... Croton... Bridgeton...
Remus... Millbrook... Barryton...
Stanwood... Brinton...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4343 8604 4382 8524 4381 8461 4347 8461
4347 8556 4330 8556 4330 8604
TIME...MOT...LOC 1841Z 277DEG 43KT 4380 8470 4355 8537 4331 8586
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
NJJ198
WWUS53 KGRR 071908
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
308 PM EDT Tue Sep 7 2021
MIC107-123-071918-
/O.CAN.KGRR.SV.W.0084.000000T0000Z-210907T1915Z/
Newaygo MI-Mecosta MI-
308 PM EDT Tue Sep 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN NEWAYGO AND MECOSTA
COUNTIES IS CANCELLED...
The storms which prompted the warning has moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
central Michigan.
LAT...LON 4347 8461 4347 8508 4349 8508 4351 8506
4381 8461
TIME...MOT...LOC 1908Z 273DEG 43KT 4369 8471 4351 8504 4326 8539
$$
MIC073-071915-
/O.CON.KGRR.SV.W.0084.000000T0000Z-210907T1915Z/
Isabella MI-
308 PM EDT Tue Sep 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR SOUTHEASTERN ISABELLA COUNTY...
At 308 PM EDT, severe thunderstorms were located along a line
extending from near Rosebush to 7 miles north of Edmore to 8 miles
northwest of Greenville, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Mount Pleasant... Shepherd... Rosebush...
Delwin... Winn...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4347 8461 4347 8508 4349 8508 4351 8506
4381 8461
TIME...MOT...LOC 1908Z 273DEG 43KT 4369 8471 4351 8504 4326 8539
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
NJJ397
WWUS53 KGRR 071917
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
317 PM EDT Tue Sep 7 2021
MIC073-071926-
/O.EXP.KGRR.SV.W.0084.000000T0000Z-210907T1915Z/
Isabella MI-
317 PM EDT Tue Sep 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ISABELLA COUNTY
HAS EXPIRED...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning has
been allowed to expire.
A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
central Michigan.
LAT...LON 4347 8461 4347 8508 4349 8508 4351 8506
4381 8461
TIME...MOT...LOC 1916Z 270DEG 55KT 4370 8456 4352 8489 4327 8524
$$
NJJThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 11:50 AM EDT | Special Marine Warning | GRR | 91 min | |
| Sep 7, 12:25 PM EDT | Severe Thunderstorm Warning | GRR | Mason | 65 min |
| Sep 7, 12:32 PM EDT | Severe Thunderstorm Warning | GRR | Lake, Osceola | 58 min |
| Sep 7, 12:40 PM EDT | Special Marine Warning | GRR | 87 min | |
| Sep 7, 12:54 PM EDT | Severe Thunderstorm Warning | GRR | Oceana | 66 min |
| Sep 7, 1:08 PM EDT | Tornado Warning | GRR | Clare, Osceola | 40 min |
| Sep 7, 1:13 PM EDT | Severe Thunderstorm Warning | GRR | Lake, Newaygo | 37 min |
| Sep 7, 1:30 PM EDT | Special Marine Warning | GRR | 60 min | |
| Sep 7, 1:39 PM EDT | Severe Thunderstorm Warning | GRR | Osceola | 38 min |
| Sep 7, 1:51 PM EDT | Severe Thunderstorm Warning | GRR | Muskegon, Oceana | 54 min |
| Sep 7, 2:01 PM EDT | Lakeshore Flood Advisory | GRR | Muskegon | 4 hr |
| Sep 7, 2:03 PM EDT | Severe Thunderstorm Warning | GRR | Clare | 46 min |
| Sep 7, 2:13 PM EDT | Tornado Warning | GRR | Clare | 30 min |
| Sep 7, 2:23 PM EDT | Tornado Warning | GRR | Isabella | 21 min |
| Sep 7, 2:40 PM EDT | Severe Thunderstorm Warning | GRR | Kent, Ottawa | 39 min |
| Sep 7, 3:04 PM EDT | Severe Thunderstorm Warning | GRR | Montcalm | 56 min |
| Sep 7, 3:26 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Gratiot, Ionia | 64 min |
| Sep 7, 3:37 PM EDT | Special Marine Warning | GRR | 83 min | |
| Sep 7, 4:05 PM EDT | Severe Thunderstorm Warning | GRR | Van Buren | 55 min |
| Sep 7, 4:49 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Barry, Kalamazoo | 42 min |
| Sep 7, 5:13 PM EDT | Severe Thunderstorm Warning | GRR | Barry, Calhoun, Eaton | 47 min |
| Sep 7, 5:40 PM EDT | Severe Thunderstorm Warning | GRR | Ingham, Jackson | 50 min |
| Sep 7, 6:01 PM EDT | Severe Thunderstorm Warning | GRR | Clinton | 29 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.