Alert archive / Michigan / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 17, NWS Marquette, MI

June 17, 2018Houghton County, Keweenaw County, Michigan

NWS Marquette, MI issued this severe thunderstorm warning at Jun 17, 2018, 12:22 AM EDT for Houghton County, Keweenaw County, Michigan. It was in force for 23 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: Jun 17, 2018, 12:22 AM EDT (04:22 UTC)
Expired: Jun 17, 2018, 12:45 AM EDT
In force: 23 min
Issued by: NWS Marquette, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Houghton County, MI, Keweenaw County, MI

The radar

The Marquette radar (KMQT), 95 km from the middle of the area, began a volume at 04:26 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, 4.4 hours before the alert went out and 297 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: 1536 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 1235 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.5

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 Jun 16, 7:54 PM EDT, 4 hours 28 minutes earlier.

Area forecast discussion, Jun 16, 7:54 PM EDT, 4 hours 28 minutes before

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Hazardous weather outlook, Jun 16, 4:26 PM EDT, 7 hours 56 minutes before

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In the hours before

Special weather statement, Jun 16, 11:58 PM EDT, 24 minutes before

Special Weather Statement
National Weather Service Marquette MI
1158 PM EDT SAT JUN 16 2018

MIZ002-003-170445-
Ontonagon MI-Houghton MI-
1158 PM EDT SAT JUN 16 2018

...SPECIAL WEATHER STATEMENT...

At 1156 PM EDT, Doppler radar was tracking a strong thunderstorm 15
miles northeast of Ontonagon with an additional strong thunderstorm
5 miles east of Hancock, moving east at 40 mph.

Half inch hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Houghton, Hancock, Chassell, South Range, Redridge, The Upper
Entrance of Portage Canal, McLain State Park, Toivola, Freda,
Fourteen Mile Point and Painesdale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4709 8900 4714 8897 4727 8859 4700 8844
      4689 8912 4702 8918
TIME...MOT...LOC 0356Z 251DEG 24KT 4701 8906

KEC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 11:58 PM EDT	Special Weather Statement	MQT	Houghton	47 min
Jun 17, 12:26 AM EDT	Special Marine Warning	MQT		23 min
Jun 17, 3:09 AM EDT	Areal Flood Advisory	MQT	Houghton, Keweenaw	3 hr
Jun 17, 3:46 AM EDT	Flash Flood Warning Emergency	MQT	Baraga, Houghton, Ontonagon	8 hr
Jun 17, 5:53 AM EDT	Flash Flood Warning	MQT	Gogebic, Houghton, Iron, Ontonagon	6 hr
Jun 17, 10:23 AM EDT	Small Craft Advisory	MQT		17 hr
Jun 17, 11:44 AM EDT	Flash Flood Warning	MQT	Houghton	8 hr
Jun 17, 5:06 PM EDT	Special Marine Warning	MQT		54 min
Jun 17, 5:13 PM EDT	Severe Thunderstorm Warning	MQT	Baraga, Marquette	62 min
Jun 17, 5:37 PM EDT	Flash Flood Warning	MQT	Gogebic	3 hr
Jun 17, 5:41 PM EDT	Severe Thunderstorm Warning	MQT	Gogebic, Ontonagon	79 min
Jun 17, 5:49 PM EDT	Areal Flood Advisory	MQT	Houghton, Ontonagon	3 hr
Jun 17, 5:57 PM EDT	Severe Thunderstorm Warning	MQT	Baraga, Houghton, Ontonagon	42 min
Jun 17, 6:48 PM EDT	Areal Flood Advisory	MQT	Alger, Marquette	3 hr
Jun 17, 6:49 PM EDT	Severe Thunderstorm Warning	MQT	Baraga, Houghton, Iron, Ontonagon	56 min
Jun 17, 6:52 PM EDT	Severe Thunderstorm Warning	MQT	Gogebic, Iron, Ontonagon	53 min
Jun 17, 7:49 PM EDT	Flash Flood Warning	MQT	Marquette	3 hr

Nearby

Severe Thunderstorm Warnings in Michigan, 2018 Every severe thunderstorm warning in 2018

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.