Alert archive / Michigan / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 61, NWS Detroit, MI

August 18, 2019Oakland County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Aug 18, 2019, 7:44 PM EDT for Oakland County, Michigan. It was in force for 47 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: Aug 18, 2019, 7:44 PM EDT (23:44 UTC)
Expired: Aug 18, 2019, 8:31 PM EDT
In force: 47 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Oakland County, MI

The radar

The Detroit radar (KDTX), 8 km from the middle of the area, began a volume at 23:44 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 12:00Z, 11.7 hours before the alert went out and 8 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: 453 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 727 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.9

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 Aug 18, 6:53 PM EDT, 51 minutes earlier.

Area forecast discussion, Aug 18, 6:53 PM EDT, 51 minutes before

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Hazardous weather outlook, Aug 18, 3:30 PM EDT, 4 hours 14 minutes before

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In the hours before

Local storm report, Aug 18, 2:43 PM EDT, 5 hours 1 minute before

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Local storm report, Aug 18, 2:51 PM EDT, 4 hours 53 minutes before

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Local storm report, Aug 18, 3:38 PM EDT, 4 hours 6 minutes before

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Local storm report, Aug 18, 4:03 PM EDT, 3 hours 41 minutes before

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Special weather statement, Aug 18, 7:03 PM EDT, 41 minutes before

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Special weather statement, Aug 18, 7:06 PM EDT, 38 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
Aug 18, 3:39 AM EDT	Small Craft Advisory	DTX		19 hr
Aug 18, 12:37 PM EDT	Special Weather Statement	DTX	Lenawee	53 min
Aug 18, 12:54 PM EDT	Special Marine Warning	DTX		81 min
Aug 18, 12:55 PM EDT	Severe Thunderstorm Warning	DTX	Monroe, Washtenaw, Wayne	54 min
Aug 18, 1:04 PM EDT	Special Marine Warning	DTX		86 min
Aug 18, 1:16 PM EDT	Special Weather Statement	DTX	Macomb	44 min
Aug 18, 1:18 PM EDT	Special Weather Statement	DTX	Lapeer	42 min
Aug 18, 1:47 PM EDT	Special Marine Warning	DTX		58 min
Aug 18, 1:49 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Sanilac	56 min
Aug 18, 2:00 PM EDT	Special Weather Statement	DTX	Macomb	60 min
Aug 18, 2:03 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair	28 min
Aug 18, 2:07 PM EDT	Special Marine Warning	DTX		83 min
Aug 18, 2:16 PM EDT	Special Marine Warning	DTX		29 min
Aug 18, 7:03 PM EDT	Special Weather Statement	DTX	Macomb, Oakland, Saint Clair	57 min
Aug 18, 7:06 PM EDT	Special Weather Statement	DTX	Livingston, Washtenaw	54 min
Aug 18, 7:12 PM EDT	Severe Thunderstorm Warning	DTX	Livingston, Washtenaw	63 min
Aug 18, 7:52 PM EDT	Special Weather Statement	DTX	Lenawee	53 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2019 Every severe thunderstorm warning in 2019

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.