Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 142, NWS Duluth, MN

August 3, 2018Ashland County, Iron County, Wisconsin

NWS Duluth, MN issued this severe thunderstorm warning at Aug 3, 2018, 1:45 PM CDT for Ashland County, Iron County, Wisconsin. It was in force for 45 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 3, 2018, 1:45 PM CDT (18:45 UTC)
Expired: Aug 3, 2018, 2:30 PM CDT
In force: 45 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Ashland County, WI, Iron County, WI

The radar

The Duluth radar (KDLH), 139 km from the middle of the area, began a volume at 18:48 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, 6.8 hours before the alert went out and 285 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: 796 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 101 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 3, 12:54 PM CDT, 51 minutes earlier.

Area forecast discussion, Aug 3, 12:54 PM CDT, 51 minutes before

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Hazardous weather outlook, Aug 3, 11:34 AM CDT, 2 hours 11 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Duluth MN
1134 AM CDT Fri Aug 3 2018

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-041130-
Koochiching-North St. Louis-Northern Cook/Northern Lake-
North Itasca-Central St. Louis-Southern Lake/North Shore-
Southern Cook/North Shore-North Cass-South Itasca-South Cass-
Crow Wing-Northern Aitkin-South Aitkin-Carlton/South St. Louis-
Pine-Douglas-Bayfield-Ashland-Iron-Burnett-Washburn-Sawyer-Price-
1134 AM CDT Fri Aug 3 2018

This Hazardous Weather Outlook is for portions of northeast
Minnesota and northwest Wisconsin.

.DAY ONE...This afternoon and Tonight

Strong northeast winds will increase the threat of rip currents
today through this evening for areas near the Twin Ports,
including the beaches of Duluth and Superior. A Beach Hazards
Statement has been issued for these areas.

Scattered thunderstorms are expected over portions of central and
east-central Minnesota into northwest Wisconsin this afternoon. A
few storms may be strong to severe with large hail, torrential
rainfall, and brief gusty winds the main threats.

Another round of thunderstorms is expected tonight over much of
the Northland. A few of the storms may be severe.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Thunderstorms are likely Saturday and there is a chance of
thunderstorms on Sunday. A few severe storms are possible with
large hail, damaging winds, and heavy rainfall the main threats.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotters are encouraged to report hail of any size, wind
damage, and rainfall amounts to the National Weather Service.

LSZ121-140>148-041130-
Bayfield to Oak Point WI-Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN-
Duluth MN to Port Wing WI-Port Wing to Sand Island WI-
Sand Island to Bayfield WI-Oak Point to Saxon Harbor WI-
1134 AM CDT Fri Aug 3 2018

This Hazardous Weather Outlook is for portions of the Nearshore
waters of western Lake Superior.

.DAY ONE...This afternoon and Tonight

Increasing northeast winds will create hazardous conditions for
small craft over far western Lake Superior. A Small Craft Advisory
has been issued for this afternoon and evening. See the latest
Nearshore Marine Forecast and Marine Weather Message for more
details.

Thunderstorms will be possible this afternoon and tonight over
portions of the nearshore waters. Small hail, occasional cloud-
to-water lightning, brief gusty winds, and heavy rain, which will
reduce visibility, are the main threats.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Thunderstorms are possible at various times throughout the long
term period. The best chance of thunderstorms will be from
Saturday through Sunday evening. There is only a small chance of
severe thunderstorms Saturday into Sunday. The main threats would
be large hail and damaging wind.

Huyck/Grochocinski/Melde

More information may be obtained at the following web address:
http://www.weather.gov/duluth (all lower case)

In the hours before

Special weather statement, Aug 3, 1:04 PM CDT, 41 minutes before

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Special weather statement, Aug 3, 1:08 PM CDT, 37 minutes before

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Special weather statement, Aug 3, 1:17 PM CDT, 28 minutes before

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Local storm report, Aug 3, 1:25 PM CDT, 20 minutes before

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Local storm report, Aug 3, 1:29 PM CDT, 16 minutes before

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Local storm report, Aug 3, 1:36 PM CDT, 9 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 3, 3:15 AM CDT	Small Craft Advisory	DLH		19 hr
Aug 3, 10:33 AM CDT	Special Weather Statement	DLH	Morrison	27 min
Aug 3, 10:47 AM CDT	Special Weather Statement	DLH	Morrison	13 min
Aug 3, 11:01 AM CDT	Special Weather Statement	DLH	Crow Wing	14 min
Aug 3, 11:02 AM CDT	Special Weather Statement	DLH	Crow Wing	13 min
Aug 3, 11:09 AM CDT	Severe Thunderstorm Warning	DLH	Cass, Crow Wing	36 min
Aug 3, 11:22 AM CDT	Special Weather Statement	DLH	Wadena	23 min
Aug 3, 11:32 AM CDT	Severe Thunderstorm Warning	DLH	Cass, Crow Wing	43 min
Aug 3, 11:49 AM CDT	Special Weather Statement	DLH	Crow Wing	11 min
Aug 3, 12:16 PM CDT	Special Weather Statement	DLH	Crow Wing	14 min
Aug 3, 12:32 PM CDT	Special Weather Statement	DLH	Crow Wing	13 min
Aug 3, 12:45 PM CDT	Special Weather Statement	DLH	Crow Wing	15 min
Aug 3, 1:04 PM CDT	Special Weather Statement	DLH	Crow Wing	11 min
Aug 3, 1:53 PM CDT	Special Weather Statement	DLH	Itasca	22 min
Aug 3, 1:58 PM CDT	Special Weather Statement	DLH	Aitkin	17 min
Aug 3, 2:47 PM CDT	Beach Hazards Statement	DLH	Carlton, Saint Louis	5 hr
Aug 3, 2:50 PM CDT	Special Weather Statement	DLH	Itasca	10 min
Aug 3, 5:53 PM CDT	Special Weather Statement	DLH	Crow Wing	37 min
Aug 3, 6:37 PM CDT	Special Weather Statement	DLH	Crow Wing	23 min
Aug 3, 3:32 AM CDT	Dense Fog Advisory	DLH	Iron, Price	3 hr
Aug 3, 10:51 AM CDT	Special Weather Statement	DLH	Washburn	9 min
Aug 3, 11:06 AM CDT	Special Weather Statement	DLH	Sawyer, Washburn	24 min
Aug 3, 11:29 AM CDT	Special Weather Statement	DLH	Douglas, Washburn	31 min
Aug 3, 11:31 AM CDT	Special Weather Statement	DLH	Sawyer	29 min
Aug 3, 12:11 PM CDT	Special Weather Statement	DLH	Washburn	19 min
Aug 3, 12:13 PM CDT	Special Weather Statement	DLH	Sawyer	17 min
Aug 3, 12:47 PM CDT	Special Weather Statement	DLH	Sawyer	13 min
Aug 3, 12:49 PM CDT	Special Weather Statement	DLH	Price	11 min
Aug 3, 12:52 PM CDT	Severe Thunderstorm Warning	DLH	Price	38 min
Aug 3, 1:08 PM CDT	Special Weather Statement	DLH	Douglas	22 min
Aug 3, 1:13 PM CDT	Severe Thunderstorm Warning	DLH	Douglas	47 min
Aug 3, 1:17 PM CDT	Special Weather Statement	DLH	Ashland	13 min
Aug 3, 1:30 PM CDT	Severe Thunderstorm Warning	DLH	Ashland, Iron, Price	45 min
Aug 3, 2:03 PM CDT	Special Weather Statement	DLH	Ashland	12 min
Aug 3, 2:18 PM CDT	Special Weather Statement	DLH	Iron	12 min
Aug 3, 2:28 PM CDT	Severe Thunderstorm Warning	DLH	Iron	47 min
Aug 3, 2:48 PM CDT	Severe Thunderstorm Warning	DLH	Iron	27 min
Aug 3, 3:17 PM CDT	Severe Thunderstorm Warning	DLH	Iron	13 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.