Alert archive / Michigan / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 57, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 20, 2023, 2:08 PM EDT for Eaton County, Michigan. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 20, 2023, 2:08 PM EDT (18:08 UTC)
- Expired
- Jul 20, 2023, 3:00 PM EDT
- In force
- 52 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Eaton County, MI
The radar
The Grand Rapids radar (KGRR), 67 km from the middle of the area, began a volume at 18:07 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 |
|---|---|---|---|
| Jul 20, 12:16 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 6.1 hours before the alert went out and 116 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
- 68 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 1249 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 110 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Rapids, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 1:47 PM EDT, 21 minutes earlier.
Area forecast discussion, Jul 20, 1:47 PM EDT, 21 minutes before
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Hazardous Weather Outlook National Weather Service Grand Rapids MI 1132 AM EDT Thu Jul 20 2023 MIZ037>040-043>046-050>052-056>059-064>067-071>074-210830- Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon- Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton- Ingham-Van Buren-Kalamazoo-Calhoun-Jackson- 1132 AM EDT Thu Jul 20 2023 This hazardous weather outlook is for portions of southwest Lower Michigan. .DAY ONE...This Afternoon and Tonight Some strong to severe thunderstorms are possible through 5 PM, especially from US 131 to the east. Damaging wind gusts and large hail are the main threats. .DAYS TWO THROUGH SEVEN...Friday through Wednesday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed for a few hours this afternoon. LMZ844>849-210830- St Joseph to South Haven MI-South Haven to Holland MI- Holland to Grand Haven MI-Grand Haven to Whitehall MI- Whitehall to Pentwater MI-Pentwater to Manistee MI- 1132 AM EDT Thu Jul 20 2023 This hazardous weather outlook is for portions of southwest Lower Michigan. .DAY ONE...This Afternoon and Tonight Winds and waves will be hazardous to small craft. A moderate to high swim risk will exist this afternoon and tonight. Some strong to severe thunderstorms with gusty winds and hail could develop south of Muskegon before 2 or 3 PM. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Winds and waves will continue to be hazardous to small craft on Friday, and a moderate to high swim risk will continue through Friday as well. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed for a few hours this afternoon.
In the hours before
Special weather statement, Jul 20, 11:18 AM EDT, 2 hours 50 minutes before
Special Weather Statement
National Weather Service Grand Rapids MI
1118 AM EDT Thu Jul 20 2023
MIZ043-201600-
Oceana MI-
1118 AM EDT Thu Jul 20 2023
...Strong thunderstorms will impact portions of Oceana County through
NOON EDT...
At 1118 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 12 miles southwest of Baldwin to 6 miles
northwest of Montague. Movement was east at 35 mph.
HAZARD...Winds in excess of 40 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Shelby... Hesperia... Elbridge...
Colfax... New Era... Rothbury...
Walkerville... St. Huberts...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4382 8613 4382 8604 4347 8604 4347 8646
4352 8648
TIME...MOT...LOC 1518Z 266DEG 29KT 4381 8606 4347 8647
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
NJJSpecial weather statement, Jul 20, 11:30 AM EDT, 2 hours 38 minutes before
Special Weather Statement
National Weather Service Grand Rapids MI
1130 AM EDT Thu Jul 20 2023
MIZ039-201700-
Osceola MI-
1130 AM EDT Thu Jul 20 2023
...Strong thunderstorms will impact portions of Osceola County
through 100 PM EDT...
At 1130 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Mitchell State Park to 5 miles south of
Baldwin. Movement was east at 25 mph.
HAZARD...Winds in excess of 40 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Evart... Reed City... Marion...
Highland... Hersey... Le Roy...
Tustin... Ashton... Sears...
Avondale... Dighton... Nartron Field...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4416 8509 4381 8509 4382 8556 4417 8556
TIME...MOT...LOC 1530Z 270DEG 24KT 4420 8553 4382 8584
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
NJJSpecial weather statement, Jul 20, 11:52 AM EDT, 2 hours 16 minutes before
Special Weather Statement
National Weather Service Grand Rapids MI
1152 AM EDT Thu Jul 20 2023
MIZ045-201730-
Mecosta MI-
1152 AM EDT Thu Jul 20 2023
...Strong thunderstorms will impact portions of Mecosta County
through 130 PM EDT...
At 1152 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Reed City to near White Cloud. Movement
was east at 35 mph.
HAZARD...Winds in excess of 40 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Big Rapids... Morley... Mecosta...
Canadian Lakes... Remus... Millbrook...
Paris... Barryton... Stanwood...
Sylvester... Rodney... Altona...
Roben-Hood Airport... Chippewa Lake...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4381 8509 4347 8509 4347 8556 4382 8556
TIME...MOT...LOC 1552Z 272DEG 32KT 4384 8553 4351 8578
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
NJJLocal storm report, Jul 20, 12:45 PM EDT, 1 hour 23 minutes before
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</html>The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 10:09 AM EDT | Special Marine Warning | GRR | 66 min | |
| Jul 20, 10:12 AM EDT | Special Weather Statement | GRR | Mason, Oceana | 63 min |
| Jul 20, 10:44 AM EDT | Special Marine Warning | GRR | 61 min | |
| Jul 20, 11:03 AM EDT | Special Weather Statement | GRR | Lake, Muskegon, Newaygo | 87 min |
| Jul 20, 11:18 AM EDT | Special Weather Statement | GRR | Oceana | 42 min |
| Jul 20, 11:30 AM EDT | Special Weather Statement | GRR | Osceola | 90 min |
| Jul 20, 11:52 AM EDT | Special Weather Statement | GRR | Mecosta | 98 min |
| Jul 20, 11:56 AM EDT | Severe Thunderstorm Warning | GRR | Osceola | 49 min |
| Jul 20, 12:09 PM EDT | Severe Thunderstorm Warning | GRR | Mecosta, Montcalm, Newaygo | 79 min |
| Jul 20, 12:18 PM EDT | Severe Thunderstorm Warning | GRR | Clare | 57 min |
| Jul 20, 12:29 PM EDT | Severe Thunderstorm Warning | GRR | Isabella | 75 min |
| Jul 20, 12:49 PM EDT | Severe Thunderstorm Warning | GRR | Montcalm | 56 min |
| Jul 20, 1:08 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot | 67 min |
| Jul 20, 1:31 PM EDT | Severe Thunderstorm Warning | GRR | Ionia, Kent | 44 min |
| Jul 20, 1:35 PM EDT | Severe Thunderstorm Warning | GRR | Clinton | 40 min |
| Jul 20, 2:14 PM EDT | Severe Thunderstorm Warning | GRR | Clinton | 31 min |
| Jul 20, 2:18 PM EDT | Severe Thunderstorm Warning | GRR | Ingham | 57 min |
| Jul 20, 2:48 PM EDT | Severe Thunderstorm Warning | GRR | Jackson | 57 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 2023Every severe thunderstorm warning in 2023
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.