Alert archive / Michigan / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 56, NWS Marquette, MI

July 18, 2017Delta County, Schoolcraft County, Michigan

NWS Marquette, MI issued this severe thunderstorm warning at Jul 18, 2017, 6:09 PM EDT for Delta County, Schoolcraft County, Michigan. It was in force for 51 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 18, 2017, 6:09 PM EDT (22:09 UTC)
Expired: Jul 18, 2017, 7:00 PM EDT
In force: 51 min
Issued by: NWS Marquette, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Delta County, MI, Schoolcraft County, MI

The radar

The Marquette radar (KMQT), 104 km from the middle of the area, began a volume at 22:12 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 12:00Z, 10.2 hours before the alert went out and 202 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1109 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 132 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 Marquette, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 18, 4:26 PM EDT, 1 hour 43 minutes earlier.

Area forecast discussion, Jul 18, 4:26 PM EDT, 1 hour 43 minutes before

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Hazardous weather outlook, Jul 18, 3:58 PM EDT, 2 hours 11 minutes before

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In the hours before

Special weather statement, Jul 18, 5:52 PM EDT, 17 minutes before

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Local storm report, Jul 18, 5:57 PM EDT, 12 minutes before

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Local storm report, Jul 18, 6:03 PM EDT, 6 minutes before

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Local storm report, Jul 18, 6:04 PM EDT, 5 minutes before

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Local storm report, Jul 18, 6:05 PM EDT, 4 minutes before

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Local storm report, Jul 18, 6:09 PM EDT, 0 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 18, 12:01 PM EDT	Small Craft Advisory	MQT		11 hr
Jul 18, 1:22 PM EDT	Special Weather Statement	MQT	Houghton, Keweenaw, Ontonagon	53 min
Jul 18, 2:17 PM EDT	Special Weather Statement	MQT	Baraga	43 min
Jul 18, 2:43 PM EDT	Special Weather Statement	MQT	Baraga	32 min
Jul 18, 3:14 PM EDT	Severe Thunderstorm Warning	MQT	Marquette	14 min
Jul 18, 3:16 PM EDT	Special Weather Statement	MQT	Dickinson	29 min
Jul 18, 3:32 PM EDT	Areal Flood Advisory	MQT	Baraga	3 hr
Jul 18, 3:43 PM EDT	Special Weather Statement	MQT	Dickinson	32 min
Jul 18, 3:47 PM EDT	Severe Thunderstorm Warning	MQT	Dickinson	28 min
Jul 18, 4:09 PM EDT	Severe Thunderstorm Warning	MQT	Marquette	51 min
Jul 18, 4:15 PM EDT	Special Weather Statement	MQT	Dickinson	30 min
Jul 18, 4:19 PM EDT	Special Marine Warning	MQT		56 min
Jul 18, 4:43 PM EDT	Special Weather Statement	MQT	Delta	32 min
Jul 18, 5:15 PM EDT	Areal Flood Advisory	MQT	Dickinson, Marquette	3 hr
Jul 18, 5:18 PM EDT	Special Weather Statement	MQT	Delta	42 min
Jul 18, 5:49 PM EDT	Special Marine Warning	MQT		56 min
Jul 18, 5:52 PM EDT	Special Weather Statement	MQT	Delta, Schoolcraft	38 min
Jul 18, 6:07 PM EDT	Special Marine Warning	MQT		2 hr
Jul 18, 7:17 PM EDT	Special Weather Statement	MQT	Menominee	43 min
Jul 18, 7:58 PM EDT	Areal Flood Advisory	MQT	Menominee	2 hr

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.