Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 78, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Sep 7, 2021, 12:32 PM EDT for Lake County, Osceola County, Michigan. It was in force for 58 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
- Sep 7, 2021, 12:32 PM EDT (16:32 UTC)
- Expired
- Sep 7, 2021, 1:30 PM EDT
- In force
- 58 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Lake County, MI, Osceola County, MI
The radar
The NCL Michigan radar (KAPX), 111 km from the middle of the area, began a volume at 16:31 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 7, 12:21 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 4.5 hours before the alert went out and 214 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
- 14 J/kg
- Mixed-layer CIN
- -216 J/kg
- Mixed-layer LCL
- 1012 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -120 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
The text
As transmitted.
835 WUUS53 KGRR 071632 SVRGRR MIC085-133-071730- /O.NEW.KGRR.SV.W.0078.210907T1632Z-210907T1730Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Grand Rapids MI 1232 PM EDT Tue Sep 7 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 130 PM EDT. * At 1231 PM EDT, a severe thunderstorm was located 6 miles southeast of Dublin, or 14 miles north of Baldwin, moving east at 55 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Marion... Luther... Highland... Le Roy... Tustin... Wolf Lake... Ashton... Irons... Bristol... Sauble Lakes... Avondale... Dighton... PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4416 8509 4392 8509 4392 8604 4417 8604 TIME...MOT...LOC 1631Z 266DEG 46KT 4410 8587 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ HOVING
2 follow-up statements
584
WWUS53 KGRR 071659
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
1259 PM EDT Tue Sep 7 2021
MIC085-133-071730-
/O.CON.KGRR.SV.W.0078.000000T0000Z-210907T1730Z/
Osceola MI-Lake MI-
1259 PM EDT Tue Sep 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM EDT
FOR OSCEOLA AND LAKE COUNTIES...
At 1258 PM EDT, severe thunderstorms were located along a line
extending from near Mitchell State Park to near Luther, moving east
at 45 mph.
Another line of severe thunderstorms in Northeast Mason county will
move into Lake County through 115 pm.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Marion... Luther... Highland...
Le Roy... Tustin... Wolf Lake...
Ashton... Irons... Bristol...
Sauble Lakes... Avondale... Dighton...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4416 8509 4392 8509 4392 8604 4417 8604
TIME...MOT...LOC 1658Z 269DEG 39KT 4417 8547 4402 8562
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
NJJ394
WWUS53 KGRR 071703
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
103 PM EDT Tue Sep 7 2021
MIC085-133-071730-
/O.CON.KGRR.SV.W.0078.000000T0000Z-210907T1730Z/
Osceola MI-Lake MI-
103 PM EDT Tue Sep 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM EDT
FOR OSCEOLA AND LAKE COUNTIES...
At 103 PM EDT, severe thunderstorms were located along a line
extending from near Mitchell State Park to 6 miles east of Luther,
moving east at 55 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...
Marion... Luther... Highland...
Le Roy... Tustin... Wolf Lake...
Ashton... Irons... Bristol...
Sauble Lakes... Avondale... Dighton...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
&&
LAT...LON 4416 8509 4392 8509 4392 8604 4417 8604
TIME...MOT...LOC 1703Z 266DEG 46KT 4417 8541 4402 8556
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
NJJThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 11:50 AM EDT | Special Marine Warning | GRR | 91 min | |
| Sep 7, 12:25 PM EDT | Severe Thunderstorm Warning | GRR | Mason | 65 min |
| Sep 7, 12:40 PM EDT | Special Marine Warning | GRR | 87 min | |
| Sep 7, 12:54 PM EDT | Severe Thunderstorm Warning | GRR | Oceana | 66 min |
| Sep 7, 1:08 PM EDT | Tornado Warning | GRR | Clare, Osceola | 40 min |
| Sep 7, 1:13 PM EDT | Severe Thunderstorm Warning | GRR | Lake, Newaygo | 37 min |
| Sep 7, 1:30 PM EDT | Special Marine Warning | GRR | 60 min | |
| Sep 7, 1:39 PM EDT | Severe Thunderstorm Warning | GRR | Osceola | 38 min |
| Sep 7, 1:51 PM EDT | Severe Thunderstorm Warning | GRR | Muskegon, Oceana | 54 min |
| Sep 7, 2:01 PM EDT | Lakeshore Flood Advisory | GRR | Muskegon | 4 hr |
| Sep 7, 2:03 PM EDT | Severe Thunderstorm Warning | GRR | Clare | 46 min |
| Sep 7, 2:13 PM EDT | Tornado Warning | GRR | Clare | 30 min |
| Sep 7, 2:20 PM EDT | Severe Thunderstorm Warning | GRR | Isabella, Mecosta, Newaygo | 55 min |
| Sep 7, 2:23 PM EDT | Tornado Warning | GRR | Isabella | 21 min |
| Sep 7, 2:40 PM EDT | Severe Thunderstorm Warning | GRR | Kent, Ottawa | 39 min |
| Sep 7, 3:04 PM EDT | Severe Thunderstorm Warning | GRR | Montcalm | 56 min |
| Sep 7, 3:26 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Gratiot, Ionia | 64 min |
| Sep 7, 3:37 PM EDT | Special Marine Warning | GRR | 83 min | |
| Sep 7, 4:05 PM EDT | Severe Thunderstorm Warning | GRR | Van Buren | 55 min |
| Sep 7, 4:49 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Barry, Kalamazoo | 42 min |
| Sep 7, 5:13 PM EDT | Severe Thunderstorm Warning | GRR | Barry, Calhoun, Eaton | 47 min |
| Sep 7, 5:40 PM EDT | Severe Thunderstorm Warning | GRR | Ingham, Jackson | 50 min |
| Sep 7, 6:01 PM EDT | Severe Thunderstorm Warning | GRR | Clinton | 29 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.