Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 68, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 28, 2021, 2:50 AM EDT for Lake County, Osceola 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, 2:50 AM EDT (06:50 UTC)
- Expired
- Aug 28, 2021, 3:45 AM EDT
- In force
- 55 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Lake County, MI, Osceola County, MI
The radar
The NCL Michigan radar (KAPX), 118 km from the middle of the area, began a volume at 06:50 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 00:00Z, 6.8 hours before the alert went out and 216 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
- 552 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 916 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 179 m²/s²
- 0-3 km storm-relative helicity
- 278 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.6
The text
As transmitted.
489
WUUS53 KGRR 280650
SVRGRR
MIC085-133-280745-
/O.NEW.KGRR.SV.W.0068.210828T0650Z-210828T0745Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
250 AM EDT Sat Aug 28 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Osceola County in central Michigan...
Lake County in west central Michigan...
* Until 345 AM EDT.
* At 249 AM EDT, severe thunderstorms were located along a line
extending from near Hoxeyville to near Baldwin, moving east at 40
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Evart... Baldwin... Reed City...
Marion... Luther... Highland...
Chase... Hersey... Le Roy...
Tustin... Nirvana... Wolf Lake...
Idlewild... Ashton... Sears...
Bristol... Avondale... Dighton...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Damaging winds and frequent 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 8509 4386 8509 4381 8582 4381 8586
4416 8590
TIME...MOT...LOC 0649Z 262DEG 34KT 4414 8579 4390 8577
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DUKE2 follow-up statements
598
WWUS53 KGRR 280716
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
316 AM EDT Sat Aug 28 2021
MIC085-133-280745-
/O.CON.KGRR.SV.W.0068.000000T0000Z-210828T0745Z/
Osceola MI-Lake MI-
316 AM EDT Sat Aug 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 AM EDT
FOR OSCEOLA AND EASTERN LAKE COUNTIES...
At 314 AM EDT, severe thunderstorms were located along a line
extending from 6 miles south of Mitchell State Park to 9 miles north
of Reed City to 5 miles southeast of Baldwin, moving east at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Evart... Baldwin... Reed City...
Marion... Luther... Highland...
Chase... Hersey... Le Roy...
Tustin... Nirvana... Idlewild...
Ashton... Sears... Bristol...
Avondale... Dighton...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4416 8509 4386 8509 4381 8582 4381 8586
4390 8587 4397 8583 4410 8571 4416 8565
TIME...MOT...LOC 0714Z 270DEG 35KT 4414 8541 4400 8544 4384 8577
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DUKE085
WWUS53 KGRR 280746
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
346 AM EDT Sat Aug 28 2021
MIC085-133-280755-
/O.EXP.KGRR.SV.W.0068.000000T0000Z-210828T0745Z/
Osceola MI-Lake MI-
346 AM EDT Sat Aug 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR OSCEOLA AND EASTERN LAKE
COUNTIES HAS EXPIRED...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been allowed to expire. However,
lightning and heavy rain are still possible with the thunderstorms
that remain over Osceola and Lake Counties.
LAT...LON 4416 8509 4386 8509 4381 8582 4381 8586
4390 8587 4397 8583 4410 8571 4416 8565
TIME...MOT...LOC 0745Z 262DEG 34KT 4418 8501 4404 8504 4388 8537
$$
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, 3:35 AM EDT | Severe Thunderstorm Warning | GRR | Clare | 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.