Alert archive / Michigan / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 45, NWS Marquette, MI

July 6, 20174 counties in Michigan

NWS Marquette, MI issued this severe thunderstorm warning at Jul 6, 2017, 9:07 PM EDT for 4 counties in Michigan. It was in force for 38 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 6, 2017, 9:07 PM EDT (01:07 UTC)
Expired: Jul 6, 2017, 9:45 PM EDT
In force: 38 min
Issued by: NWS Marquette, MI
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Delta County, MI, Dickinson County, MI, Marquette County, MI, Menominee County, MI

The radar

The Marquette radar (KMQT), 60 km from the middle of the area, began a volume at 01:10 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 6, 6:54 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.1 hours before the alert went out and 176 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: 1740 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 1469 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 5.9

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 Marquette, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 6, 7:34 PM EDT, 1 hour 33 minutes earlier.

Area forecast discussion, Jul 6, 7:34 PM EDT, 1 hour 33 minutes before

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Hazardous weather outlook, Jul 6, 3:45 PM EDT, 5 hours 22 minutes before

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In the hours before

Local storm report, Jul 6, 3:57 PM EDT, 5 hours 10 minutes before

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Special weather statement, Jul 6, 7:11 PM EDT, 1 hour 56 minutes before

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Special weather statement, Jul 6, 7:21 PM EDT, 1 hour 46 minutes before

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Special weather statement, Jul 6, 7:58 PM EDT, 1 hour 9 minutes before

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The office that day

Everything else NWS Marquette, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 6, 8:11 PM EDT	Special Weather Statement	MQT	Iron	34 min
Jul 6, 8:33 PM EDT	Special Weather Statement	MQT	Dickinson	42 min
Jul 6, 8:43 PM EDT	Special Weather Statement	MQT	Iron	17 min
Jul 6, 8:55 PM EDT	Special Weather Statement	MQT	Dickinson	35 min
Jul 6, 9:03 PM EDT	Severe Thunderstorm Warning	MQT	Marquette	26 min
Jul 6, 9:12 PM EDT	Special Marine Warning	MQT		2 hr
Jul 6, 9:25 PM EDT	Severe Thunderstorm Warning	MQT	Delta, Dickinson, Menominee	50 min
Jul 6, 10:00 PM EDT	Severe Thunderstorm Warning	MQT	Menominee	45 min
Jul 6, 11:12 PM EDT	Special Marine Warning	MQT		63 min
Jul 6, 11:15 PM EDT	Severe Thunderstorm Warning	MQT	Alger, Luce	18 min
Jul 7, 12:18 AM EDT	Special Weather Statement	MQT	Luce	27 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2017 Every severe thunderstorm warning in 2017

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.