Alert archive / Wisconsin / Special Weather Statements in 2021

Special Weather Statement, NWS Duluth, MN

August 28, 2021Douglas County, Wisconsin

NWS Duluth, MN issued this special weather statement at Aug 28, 2021, 10:58 PM CDT for Douglas County, Wisconsin. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 28, 2021, 10:58 PM CDT (03:58 UTC)
Expired
Aug 28, 2021, 11:30 PM CDT
In force
32 min
Issued by
NWS Duluth, MN
Hail
0.50 in
Wind
30

County Douglas County, WI

The radar

The Duluth radar (KDLH), 49 km from the middle of the area, began a volume at 04:00 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 00:00Z, 4.0 hours before the alert went out and 225 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2021-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1990 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2021-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 252 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1990 J/kg
Mixed-layer CIN
-120 J/kg
Mixed-layer LCL
977 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
252 m²/s²
0-3 km storm-relative helicity
227 m²/s²
Significant tornado parameter
1.0
Supercell composite
5.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 28, 9:54 PM CDT, 1 hour 4 minutes earlier.

Area forecast discussion, Aug 28, 9:54 PM CDT, 1 hour 4 minutes before
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Hazardous weather outlook, Aug 28, 10:25 PM CDT, 33 minutes before
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In the hours before

Special weather statement, Aug 28, 4:58 PM CDT, 6 hours before
Special Weather Statement
National Weather Service Duluth MN
458 PM CDT Sat Aug 28 2021

WIZ001-002-282245-
Douglas WI-Bayfield WI-
458 PM CDT Sat Aug 28 2021

...A strong thunderstorm will impact portions of southwestern
Bayfield and southeastern Douglas Counties through 545 PM CDT...

At 459 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles east of Solon Springs, or 24 miles north of Hayward, moving
east at 35 mph.

HAZARD...Wind gusts up to 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow unsecured
         objects around. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Barnes, Drummond, Middle Eau Claire Lake, and Upper Eau Claire Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a sturdy building.

&&

LAT...LON 4622 9172 4639 9181 4657 9127 4632 9114
TIME...MOT...LOC 2157Z 250DEG 28KT 4634 9166

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

GSF
Special weather statement, Aug 28, 5:25 PM CDT, 5 hours 33 minutes before
Special Weather Statement
National Weather Service Duluth MN
525 PM CDT Sat Aug 28 2021

WIZ002-282300-
Bayfield WI-
525 PM CDT Sat Aug 28 2021

...A strong thunderstorm will impact portions of central Bayfield
County through 600 PM CDT...

At 525 PM CDT, Doppler radar was tracking a strong thunderstorm over
Iron River, or 37 miles east of Superior, moving east at 50 mph.

HAZARD...Winds gusts up to 30 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow unsecured
         objects around. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Washburn, Iron River, Barksdale, Bayfield, and Moquah.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a sturdy building.

&&

LAT...LON 4667 9075 4666 9076 4666 9075 4665 9075
      4663 9078 4661 9086 4651 9144 4661 9151
      4682 9083 4667 9073
TIME...MOT...LOC 2225Z 247DEG 41KT 4657 9135

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

GSF
Special weather statement, Aug 28, 6:59 PM CDT, 3 hours 59 minutes before
Special Weather Statement
National Weather Service Duluth MN
659 PM CDT Sat Aug 28 2021

MNZ037-290045-
Carlton/South St. Louis MN-
659 PM CDT Sat Aug 28 2021

...A strong thunderstorm will impact portions of southwestern St.
Louis and northern Carlton Counties through 745 PM CDT...

At 659 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Cromwell, or 15 miles west of Cloquet, moving east at
45 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow unsecured
         objects around.

Locations impacted include...
Duluth, Cloquet, Hermantown, Scanlon, Carlton, Floodwood, Wrenshall,
Cromwell, Thomson, Brookston, Saginaw, Fond Du Lac Reservation, Pike
Lake Near Duluth, Grand Lake, Mahnomen, Culver, Gowan, Fish Lake,
Sawyer, and Jay Cooke State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a sturdy building.

&&

LAT...LON 4658 9296 4692 9296 4700 9225 4664 9225
      4665 9226 4665 9227 4666 9229 4660 9229
TIME...MOT...LOC 2359Z 263DEG 40KT 4678 9282

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

GSF
Special weather statement, Aug 28, 7:44 PM CDT, 3 hours 14 minutes before
Special Weather Statement
National Weather Service Duluth MN
744 PM CDT Sat Aug 28 2021

MNZ019-020-037-290115-
Central St. Louis MN-Southern Lake/North Shore MN-
Carlton/South St. Louis MN-
744 PM CDT Sat Aug 28 2021

...A strong thunderstorm will impact portions of southeastern St.
Louis County through 815 PM CDT...

At 744 PM CDT, Doppler radar was tracking a strong thunderstorm near
City of Rice Lake, or near Duluth, moving northeast at 45 mph.

HAZARD...Winds gusts up to 30 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow unsecured
         objects around. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Duluth, Superior, Hermantown, Proctor, Larsmont, Pike Lake Near
Duluth, Knife River, City of Rice Lake, French River, Irving, Cody,
Palmers, Lakeside-Lester Park, Spirit Valley, Central Hillside,
Piedmont Heights, Duluth Heights, Lincoln Park, Denfeld, and Wild
Rice Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a sturdy building.

&&

LAT...LON 4685 9234 4714 9193 4695 9170 4692 9175
      4687 9186 4678 9203 4674 9211 4674 9212
      4673 9213 4671 9218
TIME...MOT...LOC 0044Z 231DEG 40KT 4686 9211

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

GSF
Special weather statement, Aug 28, 8:12 PM CDT, 2 hours 46 minutes before
Special Weather Statement
National Weather Service Duluth MN
812 PM CDT Sat Aug 28 2021

MNZ012-019-020-290145-
Northern Cook/Northern Lake MN-Central St. Louis MN-
Southern Lake/North Shore MN-
812 PM CDT Sat Aug 28 2021

...Strong thunderstorms will impact portions of southeastern St.
Louis and southern Lake Counties through 845 PM CDT...

At 811 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Boulder Lake, to 7 miles northwest of
Knife River, to 6 miles southeast of Larsmont, moving northeast at 55
mph.

HAZARD...Half inch hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
Two Harbors, Silver Bay, Beaver Bay, Castle Danger, Thomas Lake Near
Brimson, Larsmont, Highland Lake, Boulder Lake, Alger, Wales,
Gooseberry Falls State Park, Pequaywan Lake, Split Rock Lighthouse
State Park, and Tettegouche State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a sturdy building.

&&

LAT...LON 4709 9077 4730 9117 4727 9120 4710 9143
      4707 9153 4700 9160 4694 9171 4703 9188
      4708 9226 4739 9157 4733 9114 4732 9115
      4730 9115 4711 9079 4711 9070
TIME...MOT...LOC 0111Z 241DEG 50KT 4708 9214 4704 9186 4693 9164

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...<30 MPH

GSF
Special weather statement, Aug 28, 10:58 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 8:12 PM CDTSpecial Weather StatementDLHLake33 min
Aug 28, 9:51 PM CDTSmall Craft AdvisoryDLH22 hr
Aug 28, 11:23 PM CDTSpecial Weather StatementDLHCarlton22 min
Aug 29, 1:04 AM CDTSpecial Weather StatementDLHLake26 min
Aug 28, 7:44 PM CDTSpecial Weather StatementDLHDouglas31 min
Aug 28, 11:19 PM CDTSpecial Weather StatementDLHPrice11 min
Aug 28, 11:40 PM CDTSpecial Weather StatementDLHAshland, Bayfield35 min
Aug 29, 1:56 AM CDTSpecial Weather StatementDLHSawyer34 min
Aug 29, 2:56 AM CDTSpecial Weather StatementDLHPrice34 min

Nearby

Special Weather Statements in Wisconsin, 2021Every special weather statement in 2021

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.