Alert archive / Michigan / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 48, NWS Marquette, MI

July 6, 2017Alger County, Luce County, Michigan

NWS Marquette, MI issued this severe thunderstorm warning at Jul 6, 2017, 11:15 PM EDT for Alger County, Luce County, Michigan. It was in force for 18 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, 11:15 PM EDT (03:15 UTC)
Expired: Jul 6, 2017, 11:33 PM EDT
In force: 18 min
Issued by: NWS Marquette, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Alger County, MI, Luce County, MI

The radar

The Marquette radar (KMQT), 117 km from the middle of the area, began a volume at 03:18 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 3.3 hours before the alert went out and 269 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, 3 hours 41 minutes earlier.

Area forecast discussion, Jul 6, 7:34 PM EDT, 3 hours 41 minutes before

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Hazardous weather outlook, Jul 6, 3:45 PM EDT, 7 hours 30 minutes before

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In the hours before

Special weather statement, Jul 6, 7:11 PM EDT, 4 hours 4 minutes before

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Special weather statement, Jul 6, 7:21 PM EDT, 3 hours 54 minutes before

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Special weather statement, Jul 6, 7:58 PM EDT, 3 hours 17 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, 9:07 PM EDT	Severe Thunderstorm Warning	MQT	Delta, Dickinson, Marquette, Menominee	38 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 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.