Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 61, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 24, 2021, 5:56 PM EDT for Clare County, Isabella County, Michigan. It was in force for 64 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
- Aug 24, 2021, 5:56 PM EDT (21:56 UTC)
- Expired
- Aug 24, 2021, 7:00 PM EDT
- In force
- 64 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Clare County, MI, Isabella County, MI
The radar
The NCL Michigan radar (KAPX), 111 km from the middle of the area, began a volume at 22:00 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 |
|---|---|---|---|
| Aug 24, 6:00 PM EDT | TSTM WND DMG | Shepherd, MI | LARGE TREE DOWNED. TIME ESTIMATED BY RADAR. |
| Aug 24, 6:00 PM EDT | TSTM WND GST 40 | 1 Sse Mount Pleasant, MI | MESONET STATION DW5588 MOUNT PLEASANT. |
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, 9.9 hours before the alert went out and 175 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
- 298 J/kg
- Mixed-layer CIN
- -182 J/kg
- Mixed-layer LCL
- 1140 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -57 m²/s²
- 0-3 km storm-relative helicity
- -89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
976
WUUS53 KGRR 242156
SVRGRR
MIC035-073-242300-
/O.NEW.KGRR.SV.W.0061.210824T2156Z-210824T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
556 PM EDT Tue Aug 24 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Isabella County in central Michigan...
Clare County in central Michigan...
* Until 700 PM EDT.
* At 556 PM EDT, severe thunderstorms were located along a line
extending from near Harrison to 8 miles southwest of Shepherd,
moving east at 20 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* Locations impacted include...
Mount Pleasant... Clare... Shepherd...
Farwell... Rosebush... Lake Isabella...
Harrison... Lake... Brinton...
Lake George... Delwin... Winn...
Loomis... Blanchard... Temple...
Long Lake... Beal City... Leota...
Weidman...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4416 8461 4347 8461 4347 8508 4407 8509
4416 8508
TIME...MOT...LOC 2156Z 272DEG 19KT 4398 8482 4345 8482
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
042 follow-up statements
383
WWUS53 KGRR 242234
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
634 PM EDT Tue Aug 24 2021
MIC073-242244-
/O.CAN.KGRR.SV.W.0061.000000T0000Z-210824T2300Z/
Isabella MI-
634 PM EDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR ISABELLA COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4416 8461 4383 8463 4383 8494 4405 8496
4415 8494
TIME...MOT...LOC 2234Z 235DEG 20KT 4410 8468
$$
MIC035-242300-
/O.CON.KGRR.SV.W.0061.000000T0000Z-210824T2300Z/
Clare MI-
634 PM EDT Tue Aug 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR CLARE COUNTY...
At 634 PM EDT, a severe thunderstorm was located near Skeels, or 12
miles northwest of Gladwin, moving northeast at 25 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Clare... Farwell... Harrison...
Lake George... Long Lake... Leota...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4416 8461 4383 8463 4383 8494 4405 8496
4415 8494
TIME...MOT...LOC 2234Z 235DEG 20KT 4410 8468
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
04906
WWUS53 KGRR 242251
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
651 PM EDT Tue Aug 24 2021
MIC035-242301-
/O.EXP.KGRR.SV.W.0061.000000T0000Z-210824T2300Z/
Clare MI-
651 PM EDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR CLARE COUNTY WILL EXPIRE AT
700 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 4416 8461 4383 8463 4383 8494 4405 8496
4415 8494
TIME...MOT...LOC 2251Z 272DEG 19KT 4410 8456
$$
04The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 2:06 PM EDT | Special Marine Warning | GRR | 114 min | |
| Aug 24, 3:48 PM EDT | Severe Thunderstorm Warning | GRR | Mason, Oceana | 42 min |
| Aug 24, 3:52 PM EDT | Special Marine Warning | GRR | 98 min | |
| Aug 24, 4:24 PM EDT | Special Marine Warning | GRR | 66 min | |
| Aug 24, 4:43 PM EDT | Severe Thunderstorm Warning | GRR | Newaygo | 49 min |
| Aug 24, 4:45 PM EDT | Severe Thunderstorm Warning | GRR | Lake | 45 min |
| Aug 24, 4:53 PM EDT | Severe Thunderstorm Warning | GRR | Newaygo | 40 min |
| Aug 24, 5:10 PM EDT | Severe Thunderstorm Warning | GRR | Kent, Mecosta, Montcalm, Osceola | 50 min |
| Aug 24, 6:06 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Gratiot, Ionia, Montcalm | 84 min |
| Aug 24, 6:13 PM EDT | Special Marine Warning | GRR | 92 min | |
| Aug 24, 6:48 PM EDT | Severe Thunderstorm Warning | GRR | Barry, Clinton, Eaton, Ingham, Ionia | 42 min |
| Aug 24, 7:38 PM EDT | Areal Flood Advisory | GRR | Calhoun, Jackson, Kalamazoo, Van Buren | 10 hr |
| Aug 24, 7:41 PM EDT | Special Marine Warning | GRR | 54 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.