Alert archive / Michigan / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 24, NWS Detroit, MI

May 15, 2007Genesee County, Shiawassee County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at May 15, 2007, 6:55 PM EDT for Genesee County, Shiawassee County, Michigan. It was in force for 80 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: May 15, 2007, 6:55 PM EDT (22:55 UTC)
Expired: May 15, 2007, 8:15 PM EDT
In force: 80 min
Issued by: NWS Detroit, MI
Area: Counties, with a storm outline in the text

Counties Genesee County, MI, Shiawassee County, MI

The radar

The Detroit radar (KDTX), 49 km from the middle of the area, began a volume at 22:58 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
May 15, 1:53 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 10.9 hours before the alert went out and 50 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1711 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 183 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 May 15, 4:43 PM EDT, 2 hours 12 minutes earlier.

Area forecast discussion, May 15, 4:43 PM EDT, 2 hours 12 minutes before

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Hazardous weather outlook, May 15, 5:15 PM EDT, 1 hour 40 minutes before

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In the hours before

Local storm report, May 15, 5:11 PM EDT, 1 hour 44 minutes before

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Local storm report, May 15, 5:19 PM EDT, 1 hour 36 minutes before

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Local storm report, May 15, 5:55 PM EDT, 1 hour before

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Local storm report, May 15, 6:19 PM EDT, 36 minutes before

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Local storm report, May 15, 6:29 PM EDT, 26 minutes before

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Local storm report, May 15, 6:51 PM EDT, 4 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
May 15, 2:50 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee	81 min
May 15, 3:04 PM EDT	Special Marine Warning	DTX		86 min
May 15, 3:13 PM EDT	Severe Thunderstorm Warning	DTX	Washtenaw	63 min
May 15, 3:16 PM EDT	Severe Thunderstorm Warning	DTX	Bay	29 min
May 15, 3:29 PM EDT	Severe Thunderstorm Warning	DTX	Wayne	91 min
May 15, 3:32 PM EDT	Special Marine Warning	DTX		93 min
May 15, 3:52 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Tuscola	53 min
May 15, 3:52 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Oakland	83 min
May 15, 4:16 PM EDT	Special Marine Warning	DTX		89 min
May 15, 4:19 PM EDT	Special Marine Warning	DTX		116 min
May 15, 4:23 PM EDT	Tornado Warning	DTX	Huron	30 min
May 15, 4:26 PM EDT	Special Marine Warning	DTX		45 min
May 15, 4:35 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair	85 min
May 15, 4:56 PM EDT	Severe Thunderstorm Warning	DTX	Sanilac	39 min
May 15, 5:21 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Oakland	39 min
May 15, 5:48 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair	36 min
May 15, 6:11 PM EDT	Special Marine Warning	DTX		19 min
May 15, 6:20 PM EDT	Severe Thunderstorm Warning	DTX	Livingston, Washtenaw	71 min
May 15, 6:21 PM EDT	Severe Thunderstorm Warning	DTX	Oakland	84 min
May 15, 6:47 PM EDT	Special Marine Warning	DTX		58 min
May 15, 7:01 PM EDT	Severe Thunderstorm Warning	DTX	Macomb	68 min
May 15, 7:11 PM EDT	Special Marine Warning	DTX		35 min
May 15, 7:11 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer	65 min
May 15, 7:38 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair	46 min
May 15, 7:43 PM EDT	Tornado Warning	DTX	Shiawassee	24 min
May 15, 7:54 PM EDT	Special Marine Warning	DTX		44 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2007 Every severe thunderstorm warning in 2007

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.