Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 69, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 28, 2021, 3:35 AM EDT for Clare County, Michigan. It was in force for 55 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 28, 2021, 3:35 AM EDT (07:35 UTC)
- Expired
- Aug 28, 2021, 4:30 AM EDT
- In force
- 55 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Clare County, MI
The radar
The NCL Michigan radar (KAPX), 99 km from the middle of the area, began a volume at 07:36 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, 7.6 hours before the alert went out and 182 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
- 1175 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 903 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted.
341 WUUS53 KGRR 280735 SVRGRR MIC035-280830- /O.NEW.KGRR.SV.W.0069.210828T0735Z-210828T0830Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Grand Rapids MI 335 AM EDT Sat Aug 28 2021 The National Weather Service in Grand Rapids has issued a * Severe Thunderstorm Warning for... Clare County in central Michigan... * Until 430 AM EDT. * At 334 AM EDT, severe thunderstorms were located along a line extending from near Vogel Center to 8 miles southeast of Marion to 5 miles south of Evart, moving east at 25 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Clare... Farwell... Harrison... Lake... Lake George... Temple... Long Lake... Leota... PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. To report severe weather, contact your nearest law enforcement agency. They will send your report to the National Weather Service office in Grand Rapids. Damaging winds and continuous cloud to ground lightning is occurring with these storms. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4416 8461 4382 8461 4381 8508 4416 8508 TIME...MOT...LOC 0734Z 269DEG 21KT 4416 8509 4400 8508 4382 8524 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ DUKE
1 follow-up statement
961
WWUS53 KGRR 280823
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
423 AM EDT Sat Aug 28 2021
MIC035-280832-
/O.EXP.KGRR.SV.W.0069.000000T0000Z-210828T0830Z/
Clare MI-
423 AM EDT Sat Aug 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR CLARE COUNTY WILL EXPIRE AT
430 AM EDT...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.
LAT...LON 4416 8461 4382 8461 4381 8508 4416 8508
TIME...MOT...LOC 0822Z 269DEG 21KT 4416 8471 4400 8470 4382 8486
$$
DUKEThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 8:12 PM EDT | Severe Thunderstorm Warning | GRR | Mecosta, Newaygo | 48 min |
| Aug 28, 1:06 AM EDT | Special Marine Warning | GRR | 84 min | |
| Aug 28, 2:09 AM EDT | Special Weather Statement | GRR | Lake, Mason | 66 min |
| Aug 28, 2:42 AM EDT | Areal Flood Advisory | GRR | Mason | 6 hr |
| Aug 28, 2:50 AM EDT | Severe Thunderstorm Warning | GRR | Lake, Osceola | 55 min |
| Aug 28, 10:32 AM EDT | Small Craft Advisory | GRR | 35 hr | |
| Aug 28, 10:40 AM EDT | Beach Hazards Statement | GRR | Allegan, Mason, Muskegon, Oceana, Ottawa, Van Buren | 35 hr |
| Aug 28, 3:54 PM EDT | Special Weather Statement | GRR | Clare | 66 min |
| Aug 28, 4:07 PM EDT | Special Weather Statement | GRR | Montcalm | 68 min |
| Aug 28, 5:43 PM EDT | Special Weather Statement | GRR | Gratiot | 62 min |
| Aug 28, 5:57 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot | 48 min |
| Aug 28, 6:43 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot | 47 min |
| Aug 28, 7:33 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot | 42 min |
| Aug 28, 7:48 PM EDT | Special Weather Statement | GRR | Clinton, Ionia | 57 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.