Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 79, NWS Duluth, MN

August 21, 2013Ashland County, Bayfield County, Iron County, Wisconsin

NWS Duluth, MN issued this severe thunderstorm warning at Aug 21, 2013, 2:16 PM CDT for Ashland County, Bayfield County, Iron County, Wisconsin. It was in force for 44 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 21, 2013, 2:16 PM CDT (19:16 UTC)
Expired: Aug 21, 2013, 3:00 PM CDT
In force: 44 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Ashland County, WI, Bayfield County, WI, Iron County, WI

The radar

The Duluth radar (KDLH), 120 km from the middle of the area, began a volume at 19:16 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, 7.3 hours before the alert went out and 288 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: 2865 J/kg
Mixed-layer CIN: -197 J/kg
Mixed-layer LCL: 819 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 24 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 21, 12:58 PM CDT, 1 hour 18 minutes earlier.

Area forecast discussion, Aug 21, 12:58 PM CDT, 1 hour 18 minutes before

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Hazardous weather outlook, Aug 21, 12:38 PM CDT, 1 hour 38 minutes before

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In the hours before

Special weather statement, Aug 21, 2:04 PM CDT, 12 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 20, 11:04 PM CDT	Special Weather Statement	DLH		56 min
Aug 21, 1:23 AM CDT	Special Weather Statement	DLH	Itasca	37 min
Aug 21, 1:26 AM CDT	Special Weather Statement	DLH	Itasca	34 min
Aug 21, 1:48 AM CDT	Special Weather Statement	DLH		27 min
Aug 21, 1:56 AM CDT	Special Weather Statement	DLH	Koochiching	34 min
Aug 21, 2:05 AM CDT	Special Weather Statement	DLH	Itasca, Saint Louis	25 min
Aug 21, 2:29 AM CDT	Special Weather Statement	DLH	Koochiching	31 min
Aug 21, 2:34 AM CDT	Special Weather Statement	DLH	Saint Louis	26 min
Aug 21, 2:38 AM CDT	Special Weather Statement	DLH	Itasca	22 min
Aug 21, 2:54 AM CDT	Special Weather Statement	DLH	Itasca	36 min
Aug 21, 3:01 AM CDT	Special Weather Statement	DLH	Saint Louis	29 min
Aug 21, 3:05 AM CDT	Special Weather Statement	DLH	Saint Louis	25 min
Aug 21, 3:11 AM CDT	Severe Thunderstorm Warning	DLH	Itasca	34 min
Aug 21, 3:34 AM CDT	Special Weather Statement	DLH	Itasca	26 min
Aug 21, 3:45 AM CDT	Special Weather Statement	DLH	Saint Louis	30 min
Aug 21, 4:14 AM CDT	Special Weather Statement	DLH	Saint Louis	31 min
Aug 21, 4:16 AM CDT	Special Weather Statement	DLH	Lake	29 min
Aug 21, 4:18 AM CDT	Special Weather Statement	DLH	Saint Louis	27 min
Aug 21, 2:04 PM CDT	Special Weather Statement	DLH	Ashland	26 min
Aug 21, 2:37 PM CDT	Special Weather Statement	DLH	Iron	23 min
Aug 21, 2:45 PM CDT	Special Weather Statement	DLH	Washburn	30 min
Aug 21, 3:10 PM CDT	Special Weather Statement	DLH	Iron, Sawyer	35 min
Aug 21, 3:53 PM CDT	Special Weather Statement	DLH	Price	22 min
Aug 21, 4:26 PM CDT	Special Weather Statement	DLH	Price	34 min
Aug 21, 4:43 PM CDT	Severe Thunderstorm Warning	DLH	Price	47 min
Aug 21, 5:28 PM CDT	Severe Thunderstorm Warning	DLH	Price	47 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2013 Every severe thunderstorm warning in 2013

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.