Alert archive / Michigan / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 28, NWS Detroit, MI

July 20, 2022Saint Clair County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Jul 20, 2022, 5:25 PM EDT for Saint Clair County, Michigan. It was in force for 50 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, 2022, 5:25 PM EDT (21:25 UTC)
Expired: Jul 20, 2022, 6:15 PM EDT
In force: 50 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Saint Clair County, MI

The radar

The Detroit radar (KDTX), 71 km from the middle of the area, began a volume at 21:29 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, 12:52 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 9.4 hours before the alert went out and 67 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: 264 J/kg
Mixed-layer CIN: -247 J/kg
Mixed-layer LCL: 913 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Detroit, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 3:40 PM EDT, 1 hour 45 minutes earlier.

Area forecast discussion, Jul 20, 3:40 PM EDT, 1 hour 45 minutes before

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Hazardous weather outlook, Jul 20, 4:27 PM EDT, 58 minutes before

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In the hours before

Local storm report, Jul 20, 3:56 PM EDT, 1 hour 29 minutes before

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Local storm report, Jul 20, 4:00 PM EDT, 1 hour 25 minutes before

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Local storm report, Jul 20, 4:18 PM EDT, 1 hour 7 minutes before

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Local storm report, Jul 20, 4:25 PM EDT, 1 hour before

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Local storm report, Jul 20, 4:46 PM EDT, 39 minutes before

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Special weather statement, Jul 20, 5:22 PM EDT, 3 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 3:44 AM EDT	Small Craft Advisory	DTX		18 hr
Jul 20, 1:06 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Saginaw	54 min
Jul 20, 1:13 PM EDT	Special Marine Warning	DTX		62 min
Jul 20, 1:50 PM EDT	Special Marine Warning	DTX		55 min
Jul 20, 1:55 PM EDT	Special Marine Warning	DTX		95 min
Jul 20, 1:58 PM EDT	Severe Thunderstorm Warning	DTX	Genesee, Lapeer, Tuscola	62 min
Jul 20, 2:23 PM EDT	Severe Thunderstorm Warning	DTX	Genesee, Lapeer, Oakland	67 min
Jul 20, 2:37 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Sanilac, Tuscola	38 min
Jul 20, 2:50 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Sanilac, Tuscola	55 min
Jul 20, 2:52 PM EDT	Special Marine Warning	DTX		53 min
Jul 20, 2:54 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Monroe, Wayne	55 min
Jul 20, 2:56 PM EDT	Special Marine Warning	DTX		64 min
Jul 20, 3:10 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Macomb, Saint Clair	32 min
Jul 20, 3:17 PM EDT	Special Marine Warning	DTX		58 min
Jul 20, 3:20 PM EDT	Tornado Warning	DTX	Sanilac	25 min
Jul 20, 5:22 PM EDT	Special Weather Statement	DTX	Sanilac	23 min
Jul 20, 5:25 PM EDT	Special Marine Warning	DTX		65 min
Jul 20, 5:53 PM EDT	Special Weather Statement	DTX	Macomb, Saint Clair	52 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2022 Every severe thunderstorm warning in 2022

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.