Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 63, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 24, 2021, 6:48 PM EDT for 5 counties in Michigan. It was in force for 42 min. 1 report 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, 6:48 PM EDT (22:48 UTC)
- Expired
- Aug 24, 2021, 7:30 PM EDT
- In force
- 42 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Barry County, MI, Clinton County, MI, Eaton County, MI, Ingham County, MI, Ionia County, MI
The radar
The Grand Rapids radar (KGRR), 86 km from the middle of the area, began a volume at 22:47 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, 7:16 PM EDT | TSTM WND GST 60 | 3 Ssw Okemos, MI |
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, 10.8 hours before the alert went out and 91 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.
942
WUUS53 KGRR 242248
SVRGRR
MIC015-037-045-065-067-242330-
/O.NEW.KGRR.SV.W.0063.210824T2248Z-210824T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
648 PM EDT Tue Aug 24 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Ingham County in south central Michigan...
Southern Ionia County in south central Michigan...
Eastern Barry County in southwestern Michigan...
Southern Clinton County in south central Michigan...
Eaton County in south central Michigan...
* Until 730 PM EDT.
* At 648 PM EDT, a severe thunderstorm was located near Grand Ledge,
or 9 miles north of Charlotte, moving east at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Lansing... Charlotte... Mason...
Hastings... Eaton Rapids... Portland...
East Lansing... Grand Ledge... Williamston...
Potterville... Lake Odessa... Leslie...
Nashville... Bellevue... Stockbridge...
Edgemont Park... DeWitt... Aurelius...
Onondaga... Bunker Hill...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4243 8414 4242 8530 4290 8530 4290 8437
4278 8436 4278 8416
TIME...MOT...LOC 2248Z 273DEG 22KT 4269 8477
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
042 follow-up statements
149
WWUS53 KGRR 242309
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
709 PM EDT Tue Aug 24 2021
MIC015-067-242318-
/O.CAN.KGRR.SV.W.0063.000000T0000Z-210824T2330Z/
Ionia MI-Barry MI-
709 PM EDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN IONIA AND EASTERN
BARRY COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4243 8414 4243 8488 4277 8488 4277 8484
4290 8483 4290 8437 4278 8436 4278 8416
TIME...MOT...LOC 2308Z 273DEG 22KT 4268 8460
$$
MIC037-045-065-242330-
/O.CON.KGRR.SV.W.0063.000000T0000Z-210824T2330Z/
Ingham MI-Clinton MI-Eaton MI-
709 PM EDT Tue Aug 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR INGHAM...SOUTHERN CLINTON AND EASTERN EATON COUNTIES...
At 708 PM EDT, a severe thunderstorm was located near Lansing, moving
east at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Lansing... Charlotte... Mason...
Eaton Rapids... East Lansing... Grand Ledge...
Williamston... Potterville... Leslie...
Stockbridge... Edgemont Park... DeWitt...
Aurelius... Onondaga... Bunker Hill...
Brookfield... Webberville... Dimondale...
Dansville... Eden...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4243 8414 4243 8488 4277 8488 4277 8484
4290 8483 4290 8437 4278 8436 4278 8416
TIME...MOT...LOC 2308Z 273DEG 22KT 4268 8460
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
04671
WWUS53 KGRR 242327
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
727 PM EDT Tue Aug 24 2021
MIC037-045-065-242337-
/O.EXP.KGRR.SV.W.0063.000000T0000Z-210824T2330Z/
Ingham MI-Clinton MI-Eaton MI-
727 PM EDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR INGHAM...SOUTHERN CLINTON AND
EASTERN EATON COUNTIES WILL EXPIRE AT 730 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
LAT...LON 4243 8414 4243 8488 4277 8488 4277 8484
4290 8483 4290 8437 4278 8436 4278 8416
TIME...MOT...LOC 2327Z 273DEG 22KT 4267 8445
$$
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, 5:56 PM EDT | Severe Thunderstorm Warning | GRR | Clare, Isabella | 64 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, 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.