Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 144, NWS Twin Cities, MN

December 15, 2021Chippewa County, Rusk County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Dec 15, 2021, 9:10 PM CST for Chippewa County, Rusk County, Wisconsin. It was in force for 28 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: Dec 15, 2021, 9:10 PM CST (03:10 UTC)
Expired: Dec 15, 2021, 9:38 PM CST
In force: 28 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Chippewa County, WI, Rusk County, WI

The radar

The La Crosse radar (KARX), 162 km from the middle of the area, began a volume at 03:10 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
Dec 15, 9:18 PM CST	TSTM WND DMG	Stanley, WI	REPORTS OF MULTIPLE TREES DOWN AND DAMAGE TO STRUCTURES PER STANLEY POLICE DEPARTMENT FACEBOOK PAGE. TIME ESTIMATED FROM RADAR.
Dec 15, 9:18 PM CST	TORNADO	Stanley, WI	NWS DAMAGE SURVEY FOUND A PRELIMINARY EF-2 TORNADO TRACK OF 7.44 MILES IN SOUTHEAST CHIPPEWA COUNTY.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Dec 15, 5:30 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.2 hours before the alert went out and 201 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: 633 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 770 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 443 m²/s²
0-3 km storm-relative helicity: 470 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.7

Open this sounding in Storm Lab

The text

As transmitted.

515 
WUUS53 KMPX 160310
SVRMPX
WIC017-107-160400-
/O.NEW.KMPX.SV.W.0144.211216T0310Z-211216T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
910 PM CST Wed Dec 15 2021

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Rusk County in northwestern Wisconsin...
  Chippewa County in west central Wisconsin...

* Until 1000 PM CST.

* At 910 PM CST, severe thunderstorms were located along a line
  extending from near New Auburn to 6 miles northwest of Cadott to 7
  miles northeast of Fairchild, moving northeast at 70 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Severe thunderstorms will be near...
  Cornell around 920 PM CST.
  Weyerhaeuser around 925 PM CST.
  Bruce and Sheldon around 930 PM CST.

Other locations in the path of these severe thunderstorms include
Hawkins.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CST for northwestern
and west central Wisconsin.

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

A Tornado Watch remains in effect until 1100 PM CST for northwestern
and west central Wisconsin.

&&

LAT...LON 4537 9092 4486 9093 4486 9120 4519 9156
      4521 9154 4529 9154 4564 9120 4563 9067
      4538 9068
TIME...MOT...LOC 0310Z 213DEG 61KT 4526 9162 4503 9123 4471 9089 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Dye

2 follow-up statements

288 
WWUS53 KMPX 160329
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
929 PM CST Wed Dec 15 2021

WIC017-160338-
/O.CAN.KMPX.SV.W.0144.000000T0000Z-211216T0400Z/
Chippewa WI-
929 PM CST Wed Dec 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR CHIPPEWA COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1100 PM CST for northwestern
and west central Wisconsin.

LAT...LON 4538 9092 4529 9092 4529 9153 4564 9120
      4563 9067 4538 9068
TIME...MOT...LOC 0328Z 213DEG 61KT 4551 9139 4528 9100 4496 9066 

$$

WIC107-160400-
/O.CON.KMPX.SV.W.0144.000000T0000Z-211216T0400Z/
Rusk WI-
929 PM CST Wed Dec 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CST
FOR RUSK COUNTY...

At 928 PM CST, severe thunderstorms were located along a line
extending from 5 miles north of Weyerhaeuser to near Sheldon to near
Owen, moving northeast at 70 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
  Hawkins.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CST for northwestern
and west central Wisconsin.

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

&&

LAT...LON 4538 9092 4529 9092 4529 9153 4564 9120
      4563 9067 4538 9068
TIME...MOT...LOC 0328Z 213DEG 61KT 4551 9139 4528 9100 4496 9066 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Dye

996 
WWUS53 KMPX 160338
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
938 PM CST Wed Dec 15 2021

WIC107-160347-
/O.CAN.KMPX.SV.W.0144.000000T0000Z-211216T0400Z/
Rusk WI-
938 PM CST Wed Dec 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR RUSK COUNTY IS CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with these thunderstorms.


LAT...LON 4538 9092 4529 9092 4529 9153 4564 9120
      4563 9067 4538 9068
TIME...MOT...LOC 0335Z 213DEG 61KT 4562 9129 4539 9090 4507 9056 

$$

Dye

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 15, 8:09 PM CST	Severe Thunderstorm Warning	MPX	Dunn, Pepin, Pierce, Saint Croix	36 min
Dec 15, 8:17 PM CST	Tornado Warning	MPX	Dunn, Pepin	28 min
Dec 15, 8:31 PM CST	Severe Thunderstorm Warning	MPX	Chippewa, Dunn, Eau Claire, Pepin	44 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.