Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 113, NWS La Crosse, WI

December 15, 2021Clark County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Dec 15, 2021, 9:05 PM CST for Clark 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: Dec 15, 2021, 9:05 PM CST (03:05 UTC)
Expired: Dec 15, 2021, 9:30 PM CST
In force: 25 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Clark County, WI

The radar

The La Crosse radar (KARX), 133 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, 9:15 PM CST	TSTM WND GST 70	Longwood, WI
Dec 15, 9:19 PM CST	TSTM WND DMG	Thorp, WI	WINDOWS BLOWN OUT, ROOFS REMOVED FROM SHEDS.

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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 3.1 hours before the alert went out and 197 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: 29 J/kg
Mixed-layer CIN: -469 J/kg
Mixed-layer LCL: 505 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 689 m²/s²
0-3 km storm-relative helicity: 687 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

952 
WUUS53 KARX 160305
SVRARX
WIC019-160330-
/O.NEW.KARX.SV.W.0113.211216T0305Z-211216T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
905 PM CST Wed Dec 15 2021

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Northern Clark County in central Wisconsin...

* Until 930 PM CST.

* At 904 PM CST, severe thunderstorms were located along a line
  extending from near Bloomer to 7 miles south of Stanley to near
  Neillsville, moving northeast at 75 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Thorp around 910 PM CST.
  Colby around 930 PM CST.

Other locations impacted by these severe thunderstorms include County
K And Capital Road, Mead Lake, Atwood, County O And Sterling Avenue,
Eidsvold, Longwood and Curtiss.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4494 9031 4477 9032 4478 9091 4502 9092
      4503 9031
TIME...MOT...LOC 0304Z 222DEG 65KT 4505 9144 4486 9094 4449 9065 

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

$$

Rieck

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 15, 7:53 PM CST	Severe Thunderstorm Warning Destructive damage threat	ARX	Buffalo, La Crosse, Trempealeau	67 min
Dec 15, 7:58 PM CST	Tornado Warning	ARX	Buffalo, Trempealeau	47 min
Dec 15, 8:01 PM CST	Tornado Warning	ARX	Buffalo	44 min
Dec 15, 8:16 PM CST	Severe Thunderstorm Warning Considerable damage threat	ARX	Crawford, Grant, Vernon	74 min
Dec 15, 8:24 PM CST	Severe Thunderstorm Warning Destructive damage threat	ARX	Clark, Jackson, La Crosse, Monroe, Vernon	81 min
Dec 15, 9:07 PM CST	Tornado Warning	ARX	Clark	38 min
Dec 15, 9:08 PM CST	Severe Thunderstorm Warning Considerable damage threat	ARX	Grant, Richland	52 min
Dec 15, 9:17 PM CST	Severe Thunderstorm Warning	ARX	Taylor	43 min
Dec 15, 9:28 PM CST	Severe Thunderstorm Warning	ARX	Clark	16 min
Dec 15, 9:32 PM CST	Tornado Warning	ARX	Clark, Taylor	28 min
Dec 15, 9:33 PM CST	Severe Thunderstorm Warning	ARX	Adams, Juneau	72 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.