Alert archive / Michigan / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 9, NWS Detroit, MI

April 5, 2023Washtenaw County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Apr 5, 2023, 12:26 PM EDT for Washtenaw County, Michigan. It was in force for 34 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: Apr 5, 2023, 12:26 PM EDT (16:26 UTC)
Expired: Apr 5, 2023, 1:00 PM EDT
In force: 34 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Washtenaw County, MI

The radar

The Detroit radar (KDTX), 58 km from the middle of the area, began a volume at 16:27 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
Apr 5, 8:41 AM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 4.4 hours before the alert went out and 62 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: 279 J/kg
Mixed-layer CIN: -278 J/kg
Mixed-layer LCL: 865 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 486 m²/s²
0-3 km storm-relative helicity: 421 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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 Detroit, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 5, 10:43 AM EDT, 1 hour 43 minutes earlier.

Area forecast discussion, Apr 5, 10:43 AM EDT, 1 hour 43 minutes before

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Hazardous weather outlook, Apr 5, 5:01 AM EDT, 7 hours 25 minutes before

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In the hours before

Special weather statement, Apr 5, 8:21 AM EDT, 4 hours 5 minutes before

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Special weather statement, Apr 5, 9:07 AM EDT, 3 hours 19 minutes before

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Special weather statement, Apr 5, 9:30 AM EDT, 2 hours 56 minutes before

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Special weather statement, Apr 5, 10:46 AM EDT, 1 hour 40 minutes before

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Local storm report, Apr 5, 12:08 PM EDT, 18 minutes before

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Local storm report, Apr 5, 12:10 PM EDT, 16 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
Apr 5, 3:05 AM EDT	Special Weather Statement	DTX	Lapeer, Macomb, Oakland, Saint Clair	55 min
Apr 5, 3:14 AM EDT	Special Weather Statement	DTX	Macomb, Saint Clair	46 min
Apr 5, 3:19 AM EDT	Special Weather Statement	DTX	Huron	56 min
Apr 5, 8:21 AM EDT	Special Weather Statement	DTX	Bay, Midland, Saginaw, Shiawassee	84 min
Apr 5, 8:31 AM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland, Saginaw	39 min
Apr 5, 9:07 AM EDT	Special Weather Statement	DTX	Tuscola	23 min
Apr 5, 9:30 AM EDT	Special Weather Statement	DTX	Huron, Sanilac	45 min
Apr 5, 10:26 AM EDT	Severe Thunderstorm Warning	DTX	Shiawassee	36 min
Apr 5, 10:46 AM EDT	Special Weather Statement	DTX	Genesee	44 min
Apr 5, 11:47 AM EDT	Severe Thunderstorm Warning	DTX	Livingston, Shiawassee	42 min
Apr 5, 12:00 PM EDT	Areal Flood Advisory	DTX	Bay, Midland, Saginaw	4 hr
Apr 5, 12:33 PM EDT	Special Weather Statement	DTX	Oakland	27 min
Apr 5, 1:00 PM EDT	Special Weather Statement	DTX	Macomb	30 min
Apr 5, 1:22 PM EDT	Special Marine Warning	DTX		23 min
Apr 5, 2:18 PM EDT	Special Weather Statement	DTX	Monroe	42 min
Apr 5, 2:26 PM EDT	Special Marine Warning	DTX		49 min
Apr 5, 2:40 PM EDT	River Flood Warning	DTX	Saginaw, Shiawassee	59 hr
Apr 5, 3:11 PM EDT	River Flood Warning	DTX	Bay, Saginaw	4 days

Nearby

Severe Thunderstorm Warnings in Michigan, 2023 Every severe thunderstorm warning in 2023

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.