Alert archive / Michigan / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 72, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 16, 2024, 12:31 AM EDT for Calhoun County, Jackson County, Michigan. It was in force for 89 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, 12:31 AM EDT (04:31 UTC)
- Expired
- Jul 16, 2024, 2:00 AM EDT
- In force
- 89 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Calhoun County, MI, Jackson County, MI
The radar
The Grand Rapids radar (KGRR), 99 km from the middle of the area, began a volume at 04:33 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 nearest sounding before it
Detroit, MI (KDTX), launched 00:00Z, 4.5 hours before the alert went out and 118 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
- 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
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 15, 10:42 PM EDT, 1 hour 49 minutes earlier.
Area forecast discussion, Jul 15, 10:42 PM EDT, 1 hour 49 minutes before
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</html>Hazardous weather outlook, Jul 15, 9:00 PM EDT, 3 hours 31 minutes before
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Local storm report, Jul 15, 11:32 PM EDT, 59 minutes before
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</html>Local storm report, Jul 16, 12:18 AM EDT, 13 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 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, 12:34 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, 1:57 AM EDT | Severe Thunderstorm Warning | GRR | Jackson | 22 min |
| 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, 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.