Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 38, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 24, 2021, 8:07 PM EDT for Calhoun County, Michigan. It was in force for 38 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, 8:07 PM EDT (00:07 UTC)
- Expired
- Jul 24, 2021, 8:45 PM EDT
- In force
- 38 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Calhoun County, MI
The radar
The Grand Rapids radar (KGRR), 84 km from the middle of the area, began a volume at 00:12 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, 8:09 PM EDT | TSTM WND DMG | 4 S Brownlee Park, MI | TREES AND POWER LINES DOWN. |
| Jul 24, 8:09 PM EDT | TSTM WND DMG | 5 Nne Marshall, MI | TREE ACROSS ROAD AT L DRIVE AND 19 MILE ROAD. |
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
Cncnati-Daytn, OH (KILN), launched 00:00Z, 0.1 hours before the alert went out and 329 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
- 1517 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
268 WUUS53 KGRR 250007 SVRGRR MIC025-250045- /O.NEW.KGRR.SV.W.0038.210725T0007Z-210725T0045Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Grand Rapids MI 807 PM EDT Sat Jul 24 2021 The National Weather Service in Grand Rapids has issued a * Severe Thunderstorm Warning for... Calhoun County in south central Michigan... * Until 845 PM EDT. * At 806 PM EDT, a severe thunderstorm was located 7 miles north of Burlington, or 8 miles southwest of Marshall, moving east at 30 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Albion... Marshall... Battle Creek... Homer... Union City... Burlington... Brownlee Park... Marengo... Athens... Tekonsha... Pine Creek... Ceresco... PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4233 8529 4235 8472 4207 8471 4207 8529 TIME...MOT...LOC 0006Z 279DEG 26KT 4221 8511 TORNADO...POSSIBLE HAIL...<.75IN WIND...60MPH $$ MEADE
2 follow-up statements
523 WWUS53 KGRR 250025 SVSGRR Severe Weather Statement National Weather Service Grand Rapids MI 825 PM EDT Sat Jul 24 2021 MIC025-250045- /O.CON.KGRR.SV.W.0038.000000T0000Z-210725T0045Z/ Calhoun MI- 825 PM EDT Sat Jul 24 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT FOR SOUTHERN CALHOUN COUNTY... At 825 PM EDT, a severe thunderstorm was located near Homer, or 8 miles south of Marshall, moving east at 35 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Albion... Marshall... Homer... Union City... Burlington... Athens... Tekonsha... Pine Creek... PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4223 8529 4226 8472 4207 8471 4207 8529 TIME...MOT...LOC 0025Z 291DEG 29KT 4214 8492 TORNADO...POSSIBLE HAIL...<.75IN WIND...60MPH $$ DUKE
664
WWUS53 KGRR 250043
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
843 PM EDT Sat Jul 24 2021
MIC025-250053-
/O.EXP.KGRR.SV.W.0038.000000T0000Z-210725T0045Z/
Calhoun MI-
843 PM EDT Sat Jul 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CALHOUN COUNTY WILL
EXPIRE AT 845 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However, gusty
winds and heavy rain are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
south central Michigan.
LAT...LON 4223 8529 4226 8472 4207 8471 4207 8529
TIME...MOT...LOC 0043Z 279DEG 26KT 4212 8475
$$
DUKEThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 8:41 PM EDT | Severe Thunderstorm Warning | GRR | Jackson | 34 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.