Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 117, NWS La Crosse, WI

December 15, 2021Adams County, Juneau County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Dec 15, 2021, 9:33 PM CST for Adams County, Juneau County, Wisconsin. It was in force for 72 min. 3 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, 9:33 PM CST (03:33 UTC)
Expired: Dec 15, 2021, 10:45 PM CST
In force: 72 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Adams County, WI, Juneau County, WI

The radar

The La Crosse radar (KARX), 94 km from the middle of the area, began a volume at 03:32 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, 9:44 PM CST	TSTM WND DMG	4 N Elroy, WI	SEVERAL TREES BLOWN DOWN
Dec 15, 9:44 PM CST	TSTM WND DMG	4 N Elroy, WI	SEVERAL TREES BLOWN DOWN.
Dec 15, 10:48 PM CST	NON-TSTM WND GST 48	1 Wnw Necedah, WI	MESONET STATION NEHW3 NECEDAH.

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, 3.6 hours before the alert went out and 167 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.

152 
WUUS53 KARX 160333
SVRARX
WIC001-057-160445-
/O.NEW.KARX.SV.W.0117.211216T0333Z-211216T0445Z/

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

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Juneau County in central Wisconsin...
  Adams County in central Wisconsin...

* Until 1045 PM CST.

* At 933 PM CST, severe thunderstorms were located along a line
  extending from 11 miles west of Babcock to near Muscoda, moving
  northeast at 60 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* These severe thunderstorms will remain over mainly rural areas of 
  Juneau and Adams Counties, including the following locations... 
  Johnson Hill, Big Spring and Highway 13 And County E.

This includes Interstate 90/94 between mile markers 53 and 86.
 
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 4364 9031 4425 9031 4425 8960 4364 8960
TIME...MOT...LOC 0333Z 234DEG 51KT 4433 9035 4314 9051 

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

$$

Rieck

2 follow-up statements

072 
WWUS53 KARX 160406
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1006 PM CST Wed Dec 15 2021

WIC001-057-160445-
/O.CON.KARX.SV.W.0117.000000T0000Z-211216T0445Z/
Juneau WI-Adams WI-
1006 PM CST Wed Dec 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CST
FOR JUNEAU AND ADAMS COUNTIES...

At 1005 PM CST, severe thunderstorms were located along a line
extending from 11 miles north of Wisconsin Rapids to near Reedsburg,
moving northeast at 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Mauston, Friendship, New Lisbon, Adams, Necedah, Dellwood, New Rome,
Lemonweir, Strongs Prairie, Big Flats, Lindina, Lyndon Station,
Kelly, Castle Rock, Colburn, and Finley.
 
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 4365 9021 4425 9015 4425 8960 4364 8960
TIME...MOT...LOC 0405Z 247DEG 54KT 4456 8980 4357 8992 

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

$$

Rieck

768 
WWUS53 KARX 160436
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1036 PM CST Wed Dec 15 2021

WIC001-057-160445-
/O.EXP.KARX.SV.W.0117.000000T0000Z-211216T0445Z/
Juneau WI-Adams WI-
1036 PM CST Wed Dec 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR JUNEAU AND ADAMS COUNTIES WILL
EXPIRE AT 1045 PM CST...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.

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

LAT...LON 4365 9021 4425 9015 4425 8960 4364 8960
TIME...MOT...LOC 0435Z 270DEG 51KT 4475 8933 4376 8946 

$$

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, 9:05 PM CST	Severe Thunderstorm Warning	ARX	Clark	25 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

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.