Alert archive / Michigan / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 32, NWS Marquette, MI

June 15, 2017Houghton County, Keweenaw County, Michigan

NWS Marquette, MI issued this severe thunderstorm warning at Jun 15, 2017, 2:21 PM EDT for Houghton County, Keweenaw County, Michigan. It was in force for 39 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 15, 2017, 2:21 PM EDT (18:21 UTC)
Expired: Jun 15, 2017, 3:00 PM EDT
In force: 39 min
Issued by: NWS Marquette, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 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 18:23 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

Minneapolis, MN (KMPX), launched 12:00Z, 6.4 hours before the alert went out and 473 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: 51 J/kg
Mixed-layer CIN: -220 J/kg
Mixed-layer LCL: 1892 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 149 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 Jun 15, 2:09 PM EDT, 12 minutes earlier.

Area forecast discussion, Jun 15, 2:09 PM EDT, 12 minutes before

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Hazardous weather outlook, Jun 15, 3:49 AM EDT, 10 hours 32 minutes before

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In the hours before

Special weather statement, Jun 15, 1:35 PM EDT, 46 minutes before

Special Weather Statement
National Weather Service Marquette MI
135 PM EDT THU JUN 15 2017

MIZ002-003-151815-
Ontonagon MI-Houghton MI-
135 PM EDT THU JUN 15 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN HOUGHTON AND
NORTHEASTERN ONTONAGON COUNTIES UNTIL 215 PM EDT...

At 135 PM EDT, Doppler radar was tracking a strong thunderstorm 12
miles southwest of Redridge, or 18 miles southwest of Houghton,
moving northeast at 20 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Houghton, Hancock, South Range, Redridge, The Upper Entrance of
Portage Canal, Dollar Bay, McLain State Park, Toivola, Freda,
Painesdale and Donken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4711 8845 4687 8894 4700 8909 4708 8901
      4708 8900 4710 8899 4720 8889 4730 8869
TIME...MOT...LOC 1735Z 222DEG 17KT 4700 8893

Ritzman

Special weather statement, Jun 15, 2:14 PM EDT, 7 minutes before

Special Weather Statement
National Weather Service Marquette MI
214 PM EDT THU JUN 15 2017

MIZ001-003-151900-
Keweenaw MI-Houghton MI-
214 PM EDT THU JUN 15 2017

...SIGNIFICANT WEATHER ADVISORY FOR KEWEENAW AND NORTHEASTERN
HOUGHTON COUNTIES UNTIL 300 PM EDT...

At 214 PM EDT, Doppler radar was tracking a strong thunderstorm over
Houghton County Airport, or near Houghton, moving northeast at 35
mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Houghton, Calumet, Eagle Harbor, Eagle River, Hancock, Laurium, Lake
Linden, Bete Grise, Hubbell, Houghton County Airport, Lac La Belle,
Phoenix, Dollar Bay, Mohawk, Gay, Allouez, Delaware, Copper City,
Ahmeek and Gratiot Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4731 8785 4715 8813 4713 8814 4702 8848
      4721 8865 4752 8811
TIME...MOT...LOC 1814Z 237DEG 30KT 4714 8846

Ritzman

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 9:28 AM EDT	Marine Dense Fog Advisory	MQT		14 hr
Jun 15, 1:33 PM EDT	Special Marine Warning	MQT		57 min
Jun 15, 1:35 PM EDT	Special Weather Statement	MQT	Houghton	40 min
Jun 15, 2:14 PM EDT	Special Weather Statement	MQT	Keweenaw	46 min
Jun 15, 2:32 PM EDT	Special Marine Warning	MQT		58 min
Jun 15, 3:42 PM EDT	Special Marine Warning	MQT		63 min
Jun 15, 4:17 PM EDT	Special Marine Warning	MQT		58 min
Jun 15, 4:39 PM EDT	Special Marine Warning	MQT		96 min
Jun 15, 5:47 PM EDT	Special Marine Warning	MQT		88 min
Jun 15, 5:55 PM EDT	Severe Thunderstorm Warning	MQT	Alger	50 min
Jun 15, 6:35 PM EDT	Severe Thunderstorm Warning	MQT	Alger, Luce	55 min
Jun 15, 6:39 PM EDT	Severe Thunderstorm Warning	MQT	Alger, Luce, Schoolcraft	66 min
Jun 15, 7:08 PM EDT	Special Marine Warning	MQT		67 min
Jun 15, 7:43 PM EDT	Severe Thunderstorm Warning	MQT	Schoolcraft	48 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.