Alert archive / Michigan / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 29, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at May 20, 2024, 8:51 PM EDT for Gratiot County, Michigan. It was in force for 24 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
- May 20, 2024, 8:51 PM EDT (00:51 UTC)
- Expired
- May 20, 2024, 9:15 PM EDT
- In force
- 24 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Gratiot County, MI
The radar
The Grand Rapids radar (KGRR), 88 km from the middle of the area, began a volume at 00:51 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 |
|---|---|---|---|
| May 20, 4:41 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Alpena, MI (KAPX), launched 00:00Z, 0.9 hours before the alert went out and 264 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
- 9 J/kg
- Mixed-layer CIN
- -124 J/kg
- Mixed-layer LCL
- 1475 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 170 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 May 20, 7:49 PM EDT, 1 hour 2 minutes earlier.
Area forecast discussion, May 20, 7:49 PM EDT, 1 hour 2 minutes before
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</html>Hazardous weather outlook, May 20, 3:43 AM EDT, 17 hours 8 minutes before
Hazardous Weather Outlook National Weather Service Grand Rapids MI 343 AM EDT Mon May 20 2024 MIZ037>040-043>046-050>052-056>059-064>067-071>074-210745- Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon- Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton- Ingham-Van Buren-Kalamazoo-Calhoun-Jackson- 343 AM EDT Mon May 20 2024 This hazardous weather outlook is for portions of southwest Lower Michigan. .DAY ONE...Today and Tonight Marginally severe storms with potential for damaging wind gusts and hail are expected from mid afternoon through late tonight. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday There is a slight risk for severe weather mainly late Tuesday night into early Wednesday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. LMZ844>849-210745- 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- 343 AM EDT Mon May 20 2024 This hazardous weather outlook is for portions of southwest Lower Michigan. .DAY ONE...Today and Tonight Marginally severe storms will bring locally higher winds and waves posing a hazard to mariners this afternoon into tonight. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday A slight risk for severe weather exists late Tuesday night with high winds and waves in and near thunderstorms posing a hazard to mariners. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
In the hours before
Special weather statement, May 20, 5:38 PM EDT, 3 hours 13 minutes before
Special Weather Statement
National Weather Service Grand Rapids MI
538 PM EDT Mon May 20 2024
MIZ064-202215-
Allegan MI-
538 PM EDT Mon May 20 2024
...Strong thunderstorms will impact portions of northwestern Allegan
County through 615 PM EDT
...
At 537 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 9 miles southwest of Saugatuck to 7 miles
northwest of South Haven. Movement was northeast at 50 mph.
HAZARD...Wind gusts of 50 to 55 mph and pea 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...
Holland... Fennville... Saugatuck...
Dorr... Ganges... Hamilton...
Douglas... Burnips... Macatawa...
Glenn... Castle Park... Saugatuck Dunes SP...
Overisel...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
southwestern Michigan.
&&
LAT...LON 4258 8623 4264 8623 4270 8620 4277 8621
4277 8580 4272 8571 4250 8624
TIME...MOT...LOC 2137Z 228DEG 48KT 4261 8637 4249 8636
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH
OSTUNOLocal storm report, May 20, 6:08 PM EDT, 2 hours 43 minutes before
Preliminary Local Storm Report
National Weather Service Grand Rapids MI
608 PM EDT Mon May 20 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0547 PM Tstm Wnd Gst 1 NNW Saugatuck 42.68N 86.21W
05/20/2024 M56 MPH LMZ845 MI Buoy
Saugatuck Pier buoy.
&&
EOLocal storm report, May 20, 6:11 PM EDT, 2 hours 40 minutes before
Preliminary Local Storm Report
National Weather Service Grand Rapids MI
611 PM EDT Mon May 20 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0557 PM Tstm Wnd Gst 2 SSE Holland 42.74N 86.09W
05/20/2024 M44 MPH Allegan MI ASOS
BIV ASOS peak wind gust.
&&
EOLocal storm report, May 20, 7:00 PM EDT, 1 hour 51 minutes before
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</html>Local storm report, May 20, 8:51 PM EDT, 0 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 |
|---|---|---|---|---|
| May 20, 8:06 PM EDT | Special Weather Statement | GRR | Barry, Calhoun, Eaton, Ingham, Jackson | 84 min |
| May 20, 8:54 PM EDT | Special Weather Statement | GRR | Clinton | 66 min |
| May 21, 4:01 AM EDT | Small Craft Advisory | GRR | 40 hr |
Nearby
Severe Thunderstorm Warnings in Michigan, 2024Every severe thunderstorm warning in 2024
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.