Alert archive / Michigan / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 73, NWS Grand Rapids, MI

July 16, 2024Jackson County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 16, 2024, 1:57 AM EDT for Jackson County, Michigan. It was in force for 22 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 16, 2024, 1:57 AM EDT (05:57 UTC)
Expired: Jul 16, 2024, 2:19 AM EDT
In force: 22 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Jackson County, MI

The radar

The Detroit radar (KDTX), 93 km from the middle of the area, began a volume at 05:56 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 16, 12:35 AM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 6.0 hours before the alert went out and 97 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: 1343 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1029 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 5.1

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 Jul 16, 1:53 AM EDT, 4 minutes earlier.

Area forecast discussion, Jul 16, 1:53 AM EDT, 4 minutes before

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Hazardous weather outlook, Jul 15, 9:00 PM EDT, 4 hours 57 minutes before

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In the hours before

Local storm report, Jul 16, 12:25 AM EDT, 1 hour 32 minutes before

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Local storm report, Jul 16, 12:35 AM EDT, 1 hour 22 minutes before

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Local storm report, Jul 16, 1:03 AM EDT, 54 minutes before

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Local storm report, Jul 16, 1:04 AM EDT, 53 minutes before

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Local storm report, Jul 16, 1:37 AM EDT, 20 minutes before

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Local storm report, Jul 16, 1:44 AM EDT, 13 minutes 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
Jul 15, 9:19 PM EDT	Special Marine Warning	GRR		116 min
Jul 15, 10:40 PM EDT	Areal Flood Advisory	GRR	Van Buren	6 hr
Jul 15, 11:18 PM EDT	Severe Thunderstorm Warning	GRR	Van Buren	42 min
Jul 15, 11:26 PM EDT	Severe Thunderstorm Warning	GRR	Kalamazoo	83 min
Jul 15, 11:42 PM EDT	Areal Flood Advisory	GRR	Kalamazoo	6 hr
Jul 15, 11:52 PM EDT	Areal Flood Warning	GRR	Van Buren	6 hr
Jul 16, 12:23 AM EDT	Areal Flood Warning	GRR	Kalamazoo	5 hr
Jul 16, 12:25 AM EDT	Severe Thunderstorm Warning	GRR	Barry, Calhoun, Kalamazoo	39 min
Jul 16, 12:31 AM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Jackson	89 min
Jul 16, 12:34 AM EDT	Areal Flood Advisory	GRR	Calhoun, Jackson	5 hr
Jul 16, 12:40 AM EDT	River Flood Warning	GRR	Jackson	21 hr
Jul 16, 2:07 PM EDT	Small Craft Advisory	GRR		54 hr
Jul 16, 2:09 PM EDT	Beach Hazards Statement	GRR	Allegan, Mason, Muskegon, Oceana, Ottawa, Van Buren	54 hr

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.