Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 37, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 24, 2021, 7:17 PM EDT for Eaton County, Ingham County, Michigan. It was in force for 43 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
- Jul 24, 2021, 7:17 PM EDT (23:17 UTC)
- Expired
- Jul 24, 2021, 8:00 PM EDT
- In force
- 43 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Eaton County, MI, Ingham County, MI
The radar
The Grand Rapids radar (KGRR), 78 km from the middle of the area, began a volume at 23:19 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 |
|---|---|---|---|
| Jul 24, 7:19 PM EDT | TSTM WND DMG | Charlotte, MI | TREES AND POWER LINES DOWN IN MULTIPLE LOCATIONS ACROSS CHARLOTTE, MICHIGAN. |
| Jul 24, 7:26 PM EDT | TSTM WND DMG | 5 Wsw Charlotte, MI | TREE ON ROADWAY. |
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 |
|---|---|---|---|
| Jul 24, 3:16 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 11.3 hours before the alert went out and 112 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
- 588 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 557 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted.
579
WUUS53 KGRR 242317
SVRGRR
MIC045-065-250000-
/O.NEW.KGRR.SV.W.0037.210724T2317Z-210725T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
717 PM EDT Sat Jul 24 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Ingham County in south central Michigan...
Eaton County in south central Michigan...
* Until 800 PM EDT.
* At 717 PM EDT, severe thunderstorms were located along a line
extending from near Potterville to near Bellevue, moving east at 45
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Charlotte... Mason... Eaton Rapids...
Potterville... Leslie... Bellevue...
Stockbridge... Aurelius... Onondaga...
Bunker Hill... Olivet... Brookfield...
Dimondale... Dansville... Eden...
Fitchburg... Holt... Gresham...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4242 8500 4244 8507 4246 8507 4269 8489
4261 8414 4242 8414
TIME...MOT...LOC 2317Z 279DEG 40KT 4266 8483 4250 8496
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
$$
MEADE2 follow-up statements
829
WWUS53 KGRR 242336
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
736 PM EDT Sat Jul 24 2021
MIC045-065-250000-
/O.CON.KGRR.SV.W.0037.000000T0000Z-210725T0000Z/
Ingham MI-Eaton MI-
736 PM EDT Sat Jul 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR INGHAM AND SOUTHEASTERN EATON COUNTIES...
At 735 PM EDT, severe thunderstorms were located along a line
extending from near Lansing to 5 miles northeast of Eaton Rapids to
11 miles southeast of Charlotte, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Lansing... Mason... Eaton Rapids...
Leslie... Stockbridge... Aurelius...
Onondaga... Bunker Hill... Olivet...
Brookfield... Dimondale... Dansville...
Eden... Fitchburg... Holt...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4242 8500 4246 8501 4251 8495 4254 8474
4259 8472 4267 8466 4261 8414 4242 8414
TIME...MOT...LOC 2335Z 276DEG 44KT 4264 8458 4255 8457 4243 8471
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
$$
DUKE783
WWUS53 KGRR 242357
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
757 PM EDT Sat Jul 24 2021
MIC045-065-250006-
/O.EXP.KGRR.SV.W.0037.000000T0000Z-210725T0000Z/
Ingham MI-Eaton MI-
757 PM EDT Sat Jul 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR INGHAM AND SOUTHEASTERN EATON
COUNTIES WILL EXPIRE AT 800 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However, gusty
winds and heavy rain are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
south central Michigan.
LAT...LON 4242 8500 4246 8501 4251 8495 4254 8474
4259 8472 4267 8466 4261 8414 4242 8414
TIME...MOT...LOC 2356Z 278DEG 42KT 4257 8417 4250 8422 4243 8432
$$
DUKEThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 12:30 PM EDT | Special Weather Statement | GRR | Clare, Lake, Osceola | 60 min |
| Jul 24, 2:58 PM EDT | Severe Thunderstorm Warning | GRR | Clare | 32 min |
| Jul 24, 4:38 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot | 52 min |
| Jul 24, 5:50 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Barry, Kent, Ottawa | 55 min |
| Jul 24, 6:58 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Eaton, Ingham | 62 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.