Alert archive / Michigan / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 84, NWS Grand Rapids, MI

August 27, 2024Barry County, Eaton County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 27, 2024, 4:08 PM EDT for Barry County, Eaton County, Michigan. It was in force for 67 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: Aug 27, 2024, 4:08 PM EDT (20:08 UTC)
Expired: Aug 27, 2024, 5:15 PM EDT
In force: 67 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Barry County, MI, Eaton County, MI

The radar

The Grand Rapids radar (KGRR), 51 km from the middle of the area, began a volume at 20:10 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
Aug 27, 1:48 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 8.1 hours before the alert went out and 135 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1160 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 1052 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

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 Aug 27, 2:57 PM EDT, 1 hour 11 minutes earlier.

Area forecast discussion, Aug 27, 2:57 PM EDT, 1 hour 11 minutes before

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Hazardous weather outlook, Aug 27, 4:51 AM EDT, 11 hours 17 minutes before

Hazardous Weather Outlook
National Weather Service Grand Rapids MI
451 AM EDT Tue Aug 27 2024

MIZ037>040-043>046-050>052-056>059-064>067-071>074-280900-
Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon-
Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton-
Ingham-Van Buren-Kalamazoo-Calhoun-Jackson-
451 AM EDT Tue Aug 27 2024

This hazardous weather outlook is for portions of southwest Lower
Michigan.

.DAY ONE...Today and Tonight

Thunderstorms are expected to move across the region this morning
with strong gusts the main concern. Locally heavy downpours with
nuisance flooding remains possible.

Heat indices of 100 to 105 Tuesday afternoon may be hazardous for
those without adequate cooling facilities.

Thunderstorms this afternoon and evening could become severe.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Thunderstorms are possible each day Tuesday through Friday. Some
storms early Wednesday could be strong to severe.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed Tuesday night.

LMZ844>849-280900-
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-
451 AM EDT Tue Aug 27 2024

This hazardous weather outlook is for portions of southwest Lower
Michigan.

.DAY ONE...Today and Tonight

Thunderstorms are expected to affect the nearshore waters.
Frequent cloud to water lightning and strong wind gusts will be
the main concerns.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Thunderstorms are possible each day through Friday. Some storms
late Tuesday into Wednesday could be strong to severe.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed Tuesday night.

In the hours before

Local storm report, Aug 27, 3:36 PM EDT, 32 minutes before

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Local storm report, Aug 27, 3:50 PM EDT, 18 minutes before

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Local storm report, Aug 27, 3:58 PM EDT, 10 minutes before

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Local storm report, Aug 27, 4:03 PM EDT, 5 minutes before

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Local storm report, Aug 27, 4:05 PM EDT, 3 minutes before

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Local storm report, Aug 27, 4:07 PM EDT, 1 minute before

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The office that day

Everything else NWS Grand Rapids, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 27, 2:43 AM EDT	Special Marine Warning	GRR		92 min
Aug 27, 3:22 AM EDT	Special Weather Statement	GRR	Mason, Oceana	83 min
Aug 27, 3:59 AM EDT	Special Weather Statement	GRR	Lake, Muskegon, Newaygo	91 min
Aug 27, 4:34 AM EDT	Special Weather Statement	GRR	Kent, Mecosta, Montcalm, Osceola, Ottawa	86 min
Aug 27, 5:03 AM EDT	Special Weather Statement	GRR	Clare	57 min
Aug 27, 12:59 PM EDT	Special Marine Warning	GRR		91 min
Aug 27, 1:26 PM EDT	Special Weather Statement	GRR	Mason	64 min
Aug 27, 1:51 PM EDT	Severe Thunderstorm Warning	GRR	Lake, Mason	54 min
Aug 27, 1:57 PM EDT	Special Marine Warning	GRR		63 min
Aug 27, 2:20 PM EDT	Special Weather Statement	GRR	Mecosta	40 min
Aug 27, 2:26 PM EDT	Severe Thunderstorm Warning	GRR	Muskegon, Newaygo, Oceana	49 min
Aug 27, 2:31 PM EDT	Special Marine Warning	GRR		33 min
Aug 27, 2:31 PM EDT	Severe Thunderstorm Warning	GRR	Mecosta, Newaygo	59 min
Aug 27, 2:34 PM EDT	Severe Thunderstorm Warning	GRR	Osceola	41 min
Aug 27, 2:43 PM EDT	Special Marine Warning	GRR		62 min
Aug 27, 2:50 PM EDT	Severe Thunderstorm Warning	GRR	Clare, Isabella	64 min
Aug 27, 2:56 PM EDT	Special Weather Statement	GRR	Ottawa	49 min
Aug 27, 3:14 PM EDT	Special Weather Statement	GRR	Kent	46 min
Aug 27, 3:18 PM EDT	Severe Thunderstorm Warning	GRR	Kent	42 min
Aug 27, 3:30 PM EDT	Severe Thunderstorm Warning	GRR	Kent	30 min
Aug 27, 3:36 PM EDT	Severe Thunderstorm Warning	GRR	Ionia, Montcalm	54 min
Aug 27, 3:55 PM EDT	Severe Thunderstorm Warning	GRR	Clinton, Gratiot	65 min
Aug 27, 4:24 PM EDT	Severe Thunderstorm Warning Considerable damage threat	GRR	Ingham	66 min
Aug 27, 4:50 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun	42 min
Aug 27, 5:12 PM EDT	Severe Thunderstorm Warning	GRR	Jackson	63 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2024 Every 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.