Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 58, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 24, 2021, 4:45 PM EDT for Lake County, Michigan. It was in force for 45 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, 4:45 PM EDT (20:45 UTC)
- Expired
- Aug 24, 2021, 5:30 PM EDT
- In force
- 45 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Lake County, MI
The radar
The NCL Michigan radar (KAPX), 124 km from the middle of the area, began a volume at 20:45 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.8 hours before the alert went out and 196 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
- 58 J/kg
- Mixed-layer CIN
- -344 J/kg
- Mixed-layer LCL
- 1387 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -33 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
748
WUUS53 KGRR 242045
SVRGRR
MIC085-242130-
/O.NEW.KGRR.SV.W.0058.210824T2045Z-210824T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
445 PM EDT Tue Aug 24 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Central Lake County in west central Michigan...
* Until 530 PM EDT.
* At 445 PM EDT, a severe thunderstorm was located near Luther, or 10
miles northeast of Baldwin, moving east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Baldwin... Luther... Chase...
Nirvana... Bristol... Wolf Lake...
Idlewild...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4416 8557 4388 8559 4389 8592 4416 8591
TIME...MOT...LOC 2045Z 255DEG 23KT 4402 8574
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
041 follow-up statement
765
WWUS53 KGRR 242123
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
523 PM EDT Tue Aug 24 2021
MIC085-242132-
/O.EXP.KGRR.SV.W.0058.000000T0000Z-210824T2130Z/
Lake MI-
523 PM EDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LAKE COUNTY WILL
EXPIRE AT 530 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 4416 8557 4388 8559 4389 8592 4416 8591
TIME...MOT...LOC 2122Z 270DEG 23KT 4408 8543
$$
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, 4:53 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, 6:48 PM EDT | Severe Thunderstorm Warning | GRR | Barry, Clinton, Eaton, Ingham, Ionia | 42 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.