Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 9, NWS Duluth, MN

June 11, 2021Douglas County, Wisconsin

NWS Duluth, MN issued this severe thunderstorm warning at Jun 11, 2021, 9:50 AM CDT for Douglas County, Wisconsin. It was in force for 25 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 11, 2021, 9:50 AM CDT (14:50 UTC)
Expired: Jun 11, 2021, 10:15 AM CDT
In force: 25 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Douglas County, WI

The radar

The Duluth radar (KDLH), 21 km from the middle of the area, began a volume at 14:51 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.

What was reported inside it

Time	Report	Where	Remark
Jun 11, 9:50 AM CDT	HAIL 1	6 Ne Patzau, WI	COCORAHS OBSERVER.
Jun 11, 9:55 AM CDT	HAIL 1	6 Se Oliver, WI

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 2.8 hours before the alert went out and 229 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: 629 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 267 m²/s²
0-3 km storm-relative helicity: 313 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

204 
WUUS53 KDLH 111450
SVRDLH
WIC031-111515-
/O.NEW.KDLH.SV.W.0009.210611T1450Z-210611T1515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Duluth MN
950 AM CDT Fri Jun 11 2021

The National Weather Service in Duluth MN has issued a

* Severe Thunderstorm Warning for...
  Northwestern Douglas County in northwestern Wisconsin...

* Until 1015 AM CDT.

* At 949 AM CDT, a severe thunderstorm was located 7 miles southwest
  of South Range, or 11 miles south of Superior, moving northeast at
  25 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Duluth, Superior, Poplar, Oliver, Wisconsin Point, South Range,
  Park Point, Wentworth, Amnicon Falls State Park, Pattison State
  Park, and Amnicon Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4655 9228 4676 9209 4683 9201 4683 9200
      4682 9197 4678 9203 4673 9198 4673 9183
      4666 9171 4644 9208
TIME...MOT...LOC 1449Z 221DEG 20KT 4655 9212 

HAIL...1.00IN
WIND...<50MPH
 
$$

Melde

1 follow-up statement

926 
WWUS53 KDLH 111508
SVSDLH

Severe Weather Statement
National Weather Service Duluth MN
1008 AM CDT Fri Jun 11 2021

WIC031-111515-
/O.CON.KDLH.SV.W.0009.000000T0000Z-210611T1515Z/
Douglas WI-
1008 AM CDT Fri Jun 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 AM CDT
FOR NORTHWESTERN DOUGLAS COUNTY...

At 1007 AM CDT, a severe thunderstorm was located over South Range,
or 8 miles southeast of Superior, moving northeast at 20 mph.

HAZARD...Quarter size hail.

SOURCE...Trained weather spotters.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Duluth, Superior, Poplar, Oliver, Wisconsin Point, South Range, Park
Point, Wentworth, Amnicon Falls State Park, Pattison State Park, and
Amnicon Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4655 9228 4676 9209 4683 9201 4683 9200
      4682 9197 4678 9203 4673 9198 4673 9183
      4666 9171 4644 9208
TIME...MOT...LOC 1507Z 222DEG 16KT 4661 9203 

HAIL...1.00IN
WIND...<50MPH
 
$$

Melde

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 7:01 PM CDT	Special Weather Statement	DLH	Sawyer	29 min
Jun 10, 7:02 PM CDT	Special Weather Statement	DLH	Price	28 min
Jun 10, 7:10 PM CDT	Special Weather Statement	DLH	Price	20 min
Jun 10, 7:10 PM CDT	Special Weather Statement	DLH	Sawyer	35 min
Jun 10, 7:25 PM CDT	Areal Flood Advisory	DLH	Ashland, Price, Sawyer	3 hr
Jun 10, 7:31 PM CDT	Special Weather Statement	DLH	Sawyer	29 min
Jun 10, 7:38 PM CDT	Special Weather Statement	DLH	Sawyer	22 min
Jun 10, 7:44 PM CDT	Special Weather Statement	DLH	Sawyer	31 min
Jun 10, 7:56 PM CDT	Special Weather Statement	DLH	Price	34 min
Jun 10, 8:13 PM CDT	Special Weather Statement	DLH	Sawyer	32 min
Jun 10, 8:21 PM CDT	Severe Thunderstorm Warning	DLH	Sawyer	39 min
Jun 10, 9:01 PM CDT	Special Weather Statement	DLH	Sawyer	14 min
Jun 10, 9:15 PM CDT	Special Weather Statement	DLH	Sawyer	15 min
Jun 10, 9:29 PM CDT	Special Weather Statement	DLH	Sawyer	16 min
Jun 11, 12:02 AM CDT	Special Weather Statement	DLH	Iron	13 min
Jun 11, 2:33 AM CDT	Special Weather Statement	DLH	Iron	27 min
Jun 11, 6:50 AM CDT	Dense Fog Advisory	DLH	Ashland, Bayfield, Douglas, Iron	4 hr
Jun 11, 7:00 AM CDT	Beach Hazards Statement	DLH	Douglas	14 hr
Jun 11, 10:18 AM CDT	Special Weather Statement	DLH	Douglas	27 min
Jun 11, 4:55 PM CDT	Special Weather Statement	DLH	Bayfield	20 min
Jun 11, 5:16 PM CDT	Severe Thunderstorm Warning	DLH	Ashland, Bayfield	44 min
Jun 11, 5:40 PM CDT	Special Weather Statement	DLH	Sawyer	20 min
Jun 11, 5:57 PM CDT	Special Weather Statement	DLH	Sawyer	33 min
Jun 11, 6:30 PM CDT	Special Weather Statement	DLH	Iron	30 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2021 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.