Alert archive / Michigan / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 56, NWS Detroit, MI

July 19, 2020Monroe County, Wayne County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Jul 19, 2020, 2:02 PM EDT for Monroe County, Wayne County, Michigan. It was in force for 58 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 19, 2020, 2:02 PM EDT (18:02 UTC)
Expired: Jul 19, 2020, 3:00 PM EDT
In force: 58 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Monroe County, MI, Wayne County, MI

The radar

The Detroit radar (KDTX), 67 km from the middle of the area, began a volume at 18:01 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, 6.0 hours before the alert went out and 69 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: 1433 J/kg
Mixed-layer CIN: -109 J/kg
Mixed-layer LCL: 988 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.8

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 19, 1:29 PM EDT, 33 minutes earlier.

Area forecast discussion, Jul 19, 1:29 PM EDT, 33 minutes before

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Hazardous weather outlook, Jul 19, 1:10 PM EDT, 52 minutes before

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In the hours before

Local storm report, Jul 19, 12:40 PM EDT, 1 hour 22 minutes before

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Local storm report, Jul 19, 12:42 PM EDT, 1 hour 20 minutes before

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Local storm report, Jul 19, 12:45 PM EDT, 1 hour 17 minutes before

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Special weather statement, Jul 19, 1:24 PM EDT, 38 minutes before

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Local storm report, Jul 19, 1:37 PM EDT, 25 minutes before

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Special weather statement, Jul 19, 1:53 PM EDT, 9 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 19, 3:05 AM EDT	Heat Advisory	DTX	Lenawee, Livingston, Macomb, Monroe, Oakland, Saint Clair and 2 more	10 hr
Jul 19, 3:23 AM EDT	Small Craft Advisory	DTX		17 hr
Jul 19, 7:49 AM EDT	Special Marine Warning	DTX		56 min
Jul 19, 8:28 AM EDT	Special Weather Statement	DTX	Bay, Midland	62 min
Jul 19, 8:34 AM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland	56 min
Jul 19, 8:45 AM EDT	Special Marine Warning	DTX		58 min
Jul 19, 9:03 AM EDT	Severe Thunderstorm Warning	DTX	Saginaw	73 min
Jul 19, 9:17 AM EDT	Severe Thunderstorm Warning	DTX	Tuscola	58 min
Jul 19, 9:35 AM EDT	Special Weather Statement	DTX	Sanilac	70 min
Jul 19, 9:43 AM EDT	Special Weather Statement	DTX	Shiawassee	47 min
Jul 19, 9:48 AM EDT	Special Weather Statement	DTX	Genesee, Lapeer	42 min
Jul 19, 10:07 AM EDT	Severe Thunderstorm Warning	DTX	Genesee, Shiawassee	53 min
Jul 19, 10:21 AM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Oakland	54 min
Jul 19, 10:49 AM EDT	Special Weather Statement	DTX	Macomb	56 min
Jul 19, 11:16 AM EDT	Special Weather Statement	DTX	Livingston, Oakland	44 min
Jul 19, 11:43 AM EDT	Severe Thunderstorm Warning	DTX	Washtenaw	35 min
Jul 19, 11:49 AM EDT	Special Marine Warning	DTX		71 min
Jul 19, 11:49 AM EDT	Severe Thunderstorm Warning	DTX	Macomb, Saint Clair	56 min
Jul 19, 12:16 PM EDT	Special Weather Statement	DTX	Wayne	29 min
Jul 19, 1:24 PM EDT	Special Weather Statement	DTX	Lenawee, Monroe, Washtenaw, Wayne	36 min
Jul 19, 1:53 PM EDT	Special Weather Statement	DTX	Washtenaw, Wayne	37 min
Jul 19, 2:03 PM EDT	Special Marine Warning	DTX		87 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2020 Every severe thunderstorm warning in 2020

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.