Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 175, NWS Duluth, MN

August 31, 2018Iron County, Price County, Wisconsin

NWS Duluth, MN issued this severe thunderstorm warning at Aug 31, 2018, 4:06 AM CDT for Iron County, Price County, Wisconsin. It was in force for 24 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: Aug 31, 2018, 4:06 AM CDT (09:06 UTC)
Expired: Aug 31, 2018, 4:30 AM CDT
In force: 24 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Iron County, WI, Price County, WI

The radar

The Duluth radar (KDLH), 173 km from the middle of the area, began a volume at 09:09 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, 9.1 hours before the alert went out and 242 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: 1326 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 133 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 Duluth, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 31, 12:20 AM CDT, 3 hours 46 minutes earlier.

Area forecast discussion, Aug 31, 12:20 AM CDT, 3 hours 46 minutes before

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Hazardous weather outlook, Aug 30, 3:14 PM CDT, 12 hours 52 minutes before

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In the hours before

Special weather statement, Aug 31, 12:26 AM CDT, 3 hours 40 minutes before

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Special weather statement, Aug 31, 1:00 AM CDT, 3 hours 6 minutes before

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Special weather statement, Aug 31, 3:24 AM CDT, 42 minutes before

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Special weather statement, Aug 31, 3:27 AM CDT, 39 minutes before

Special Weather Statement
National Weather Service Duluth MN
327 AM CDT FRI AUG 31 2018

WIZ002-007-008-310845-
Bayfield-Sawyer-Washburn-
327 AM CDT FRI AUG 31 2018

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN BAYFIELD...
NORTHEASTERN WASHBURN AND NORTHWESTERN SAWYER COUNTIES...

At 326 AM CDT, a strong thunderstorm was near Hayward, moving
northeast at 40 mph.

Wind gusts up to 40 mph, half inch hail, and frequent cloud to ground
lightning can be expected with this storm.

This storm will be near...
  Hayward around 330 AM CDT.
  Round Lake around 340 AM CDT.
  Cable and Seeley around 345 AM CDT.

Other locations impacted by this storm include Totagatic Flowage,
Stanberry, Totagatic Lake, Lost Land Lake, Teal Lake, Spider Lake In
Sawyer County, and Nelson Lake.

Seek shelter inside a sturdy building and away from windows until
this storm passes. Get off area lakes and seek shelter on shore in a
sturdy shelter or a hard-topped vehicle.

LAT...LON 4609 9173 4616 9164 4616 9155 4622 9155
      4634 9140 4608 9109 4593 9161
TIME...MOT...LOC 0826Z 240DEG 35KT 4605 9158

Wolfe

Special weather statement, Aug 31, 3:46 AM CDT, 20 minutes before

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Special weather statement, Aug 31, 4:02 AM CDT, 4 minutes before

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The office that day

Everything else NWS Duluth, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 30, 10:39 PM CDT	Special Weather Statement	DLH	Pine	51 min
Aug 31, 12:26 AM CDT	Special Weather Statement	DLH	Pine	34 min
Aug 31, 1:00 AM CDT	Special Weather Statement	DLH	Carlton	30 min
Aug 31, 3:55 AM CDT	Small Craft Advisory	DLH		10 hr
Aug 31, 4:26 AM CDT	Flash Flood Watch	DLH	Carlton, Cook, Lake, Pine, Saint Louis	24 hr
Aug 31, 2:42 PM CDT	Special Weather Statement	DLH	Koochiching	33 min
Aug 31, 2:58 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	17 min
Aug 31, 3:19 PM CDT	Special Weather Statement	DLH	Koochiching	11 min
Aug 31, 3:28 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	17 min
Aug 31, 5:56 PM CDT	Special Weather Statement	DLH	Cass	19 min
Aug 31, 6:09 PM CDT	Severe Thunderstorm Warning	DLH	Cass, Crow Wing	51 min
Aug 31, 6:44 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Cass, Crow Wing	46 min
Aug 31, 3:24 AM CDT	Special Weather Statement	DLH	Burnett	21 min
Aug 31, 3:27 AM CDT	Special Weather Statement	DLH	Sawyer	18 min
Aug 31, 3:46 AM CDT	Special Weather Statement	DLH	Burnett, Washburn	14 min
Aug 31, 4:02 AM CDT	Special Weather Statement	DLH	Bayfield	13 min
Aug 31, 4:24 AM CDT	Special Weather Statement	DLH	Sawyer	36 min
Aug 31, 4:58 AM CDT	Special Weather Statement	DLH	Iron	32 min
Aug 31, 5:27 AM CDT	Special Weather Statement	DLH	Iron	18 min
Aug 31, 7:03 AM CDT	Special Weather Statement	DLH	Burnett	27 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 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.