Alert archive / Michigan / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 49, NWS Detroit, MI

July 15, 2010Washtenaw County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Jul 15, 2010, 5:46 PM EDT for Washtenaw County, Michigan. It was in force for 74 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 15, 2010, 5:46 PM EDT (21:46 UTC)
Expired: Jul 15, 2010, 7:00 PM EDT
In force: 74 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 21:48 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 15, 1:30 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 9.8 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: 115 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 1003 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 94 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 Jul 15, 4:18 PM EDT, 1 hour 28 minutes earlier.

Area forecast discussion, Jul 15, 4:18 PM EDT, 1 hour 28 minutes before

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Hazardous weather outlook, Jul 15, 5:21 PM EDT, 25 minutes before

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In the hours before

Local storm report, Jul 15, 4:41 PM EDT, 1 hour 5 minutes before

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Local storm report, Jul 15, 4:58 PM EDT, 48 minutes before

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Special weather statement, Jul 15, 4:59 PM EDT, 47 minutes before

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Local storm report, Jul 15, 5:10 PM EDT, 36 minutes before

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Special weather statement, Jul 15, 5:38 PM EDT, 8 minutes before

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Local storm report, Jul 15, 5:42 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
Jul 15, 5:34 AM EDT	Small Craft Advisory	DTX		10 hr
Jul 15, 2:06 PM EDT	Special Marine Warning	DTX		114 min
Jul 15, 2:55 PM EDT	Special Marine Warning	DTX		110 min
Jul 15, 2:55 PM EDT	Severe Thunderstorm Warning	DTX	Bay	50 min
Jul 15, 3:09 PM EDT	Severe Thunderstorm Warning	DTX	Huron	96 min
Jul 15, 3:39 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Saginaw	42 min
Jul 15, 3:43 PM EDT	Special Marine Warning	DTX		62 min
Jul 15, 3:55 PM EDT	Special Marine Warning	DTX		65 min
Jul 15, 3:55 PM EDT	Severe Thunderstorm Warning	DTX	Saginaw	28 min
Jul 15, 3:57 PM EDT	Severe Thunderstorm Warning	DTX	Shiawassee	78 min
Jul 15, 4:10 PM EDT	Severe Thunderstorm Warning	DTX	Tuscola	48 min
Jul 15, 4:29 PM EDT	Small Craft Advisory	DTX		24 hr
Jul 15, 4:31 PM EDT	Severe Thunderstorm Warning	DTX	Genesee	59 min
Jul 15, 4:45 PM EDT	Special Marine Warning	DTX		90 min
Jul 15, 4:51 PM EDT	Severe Thunderstorm Warning	DTX	Genesee, Livingston, Shiawassee	54 min
Jul 15, 4:58 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer	77 min
Jul 15, 5:10 PM EDT	Severe Thunderstorm Warning	DTX	Oakland	80 min
Jul 15, 5:12 PM EDT	Severe Thunderstorm Warning	DTX	Livingston	66 min
Jul 15, 5:18 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Tuscola	29 min
Jul 15, 5:20 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair, Sanilac	70 min
Jul 15, 5:27 PM EDT	Special Marine Warning	DTX		108 min
Jul 15, 5:52 PM EDT	Severe Thunderstorm Warning	DTX	Oakland	73 min
Jul 15, 6:00 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Saint Clair, Wayne	90 min
Jul 15, 6:09 PM EDT	Severe Thunderstorm Warning	DTX	Wayne	81 min
Jul 15, 6:12 PM EDT	Special Marine Warning	DTX		100 min
Jul 15, 6:26 PM EDT	Areal Flood Advisory	DTX	Macomb, Oakland, Washtenaw, Wayne	3 hr
Jul 15, 7:15 PM EDT	Special Marine Warning	DTX		45 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2010 Every severe thunderstorm warning in 2010

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.