Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 64, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 24, 2021, 8:37 PM EDT for Calhoun County, Kalamazoo County, Michigan. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 24, 2021, 8:37 PM EDT (00:37 UTC)
- Expired
- Aug 24, 2021, 9:19 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 Calhoun County, MI, Kalamazoo County, MI
The radar
The Grand Rapids radar (KGRR), 78 km from the middle of the area, began a volume at 00:36 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.
The nearest sounding before it
Detroit, MI (KDTX), launched 00:00Z, 0.6 hours before the alert went out and 166 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
- 3040 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1099 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
217 WUUS53 KGRR 250037 SVRGRR MIC025-077-250145- /O.NEW.KGRR.SV.W.0064.210825T0037Z-210825T0145Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Grand Rapids MI 837 PM EDT Tue Aug 24 2021 The National Weather Service in Grand Rapids has issued a * Severe Thunderstorm Warning for... Calhoun County in south central Michigan... Kalamazoo County in southwestern Michigan... * Until 945 PM EDT. * At 837 PM EDT, a severe thunderstorm was located near Climax, or 8 miles east of Portage, moving east at 35 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Kalamazoo... Portage... Albion... Marshall... Battle Creek... Vicksburg... Galesburg... Homer... Union City... Schoolcraft... Climax... Richland... Burlington... Westwood... Brownlee Park... Comstock Northwest... Level Park-Oak Park... Gull Lake... Alamo... Fulton... PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4207 8575 4242 8575 4242 8472 4208 8471 TIME...MOT...LOC 0037Z 268DEG 31KT 4221 8543 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ 04
1 follow-up statement
331
WWUS53 KGRR 250119
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
919 PM EDT Tue Aug 24 2021
MIC025-077-250129-
/O.CAN.KGRR.SV.W.0064.000000T0000Z-210825T0145Z/
Calhoun MI-Kalamazoo MI-
919 PM EDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR CALHOUN AND KALAMAZOO COUNTIES
IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
LAT...LON 4207 8575 4242 8575 4242 8472 4208 8471
TIME...MOT...LOC 0117Z 268DEG 31KT 4222 8494
$$
04The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 3:38 AM EDT | Heat Advisory | GRR | Allegan, Barry, Calhoun, Clinton, Eaton, Ingham and 6 more | 16 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.