Alert archive / Wisconsin / Tornado Warnings in 2021

Tornado Warning 11, NWS La Crosse, WI

August 11, 2021Adams County, Juneau County, Monroe County, Wisconsin

NWS La Crosse, WI issued this tornado warning at Aug 11, 2021, 2:20 PM CDT for Adams County, Juneau County, Monroe County, Wisconsin. It was in force for 55 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 11, 2021, 2:20 PM CDT (19:20 UTC)
Expired: Aug 11, 2021, 3:15 PM CDT
In force: 55 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Tornado: Observed
Damage threat: Considerable
Hail: 1.25 in

Counties Adams County, WI, Juneau County, WI, Monroe County, WI

The radar

The La Crosse radar (KARX), 91 km from the middle of the area, began a volume at 19:22 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 watch it was issued in

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

Issued	Product	Office	Lasted
Aug 11, 12:17 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 7.3 hours before the alert went out and 169 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: 1499 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 678 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 206 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted.

330 
WFUS53 KARX 111920
TORARX
WIC001-057-081-112015-
/O.NEW.KARX.TO.W.0011.210811T1920Z-210811T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
220 PM CDT Wed Aug 11 2021

The National Weather Service in La Crosse has issued a

* Tornado Warning for...
  Southern Juneau County in central Wisconsin...
  Adams County in central Wisconsin...
  East central Monroe County in west central Wisconsin...

* Until 315 PM CDT.

* At 219 PM CDT, a confirmed large and extremely dangerous tornado
  was located near New Lisbon, or 10 miles northwest of Mauston,
  moving east at 35 mph.

  This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

  HAZARD...Damaging tornado.

  SOURCE...Weather spotters confirmed a large tornado near Clifton.

  IMPACT...You are in a life-threatening situation. Flying debris 
           may be deadly to those caught without shelter. Mobile 
           homes will be destroyed. Considerable damage to homes, 
           businesses, and vehicles is likely and complete 
           destruction is possible.

* The tornado will be near...
  New Lisbon around 225 PM CDT.
  Mauston around 230 PM CDT.
  Necedah around 240 PM CDT.
  Dellwood around 245 PM CDT.
  Friendship and Adams around 300 PM CDT.

Other locations impacted by this tornadic thunderstorm include The
Town Of Quincy, Highways 13 And 21, The Necedah Wildlife Refuge,
County Roads G And M, Johnson Hill, Cutler and Mill Bluff State Park.

This includes Interstate 90/94 between mile markers 49 and 76.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a large, extremely dangerous and potentially deadly
tornado is on the ground. To protect your life, TAKE COVER NOW! Move
to a basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4374 9034 4404 9039 4414 8960 4375 8960
TIME...MOT...LOC 1919Z 257DEG 29KT 4391 9023 

TORNADO...OBSERVED
TORNADO DAMAGE THREAT...CONSIDERABLE
MAX HAIL SIZE...1.25 IN

$$

DTJ

4 follow-up statements

325 
WWUS53 KARX 111934
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
234 PM CDT Wed Aug 11 2021

WIC001-057-081-112015-
/O.CON.KARX.TO.W.0011.000000T0000Z-210811T2015Z/
Juneau WI-Adams WI-Monroe WI-
234 PM CDT Wed Aug 11 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CDT FOR SOUTHERN
JUNEAU...ADAMS AND EAST CENTRAL MONROE COUNTIES...
    
At 233 PM CDT, a confirmed large and extremely dangerous tornado was
located near Dellwood, or 9 miles west of Friendship, moving east at
40 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado.

SOURCE...Weather spotters did confirm a tornado near Clifton near 
         the Monroe and Juneau County line.

IMPACT...You are in a life-threatening situation. Flying debris may 
         be deadly to those caught without shelter. Mobile homes 
         will be destroyed. Considerable damage to homes, 
         businesses, and vehicles is likely and complete destruction 
         is possible.

The tornado will be near...
  Friendship and Adams around 250 PM CDT.

Other locations impacted by this tornadic thunderstorm include The
Town Of Quincy, Highways 13 And 21, The Necedah Wildlife Refuge,
County Roads G And M, Johnson Hill, Cutler and Mill Bluff State Park.

This includes Interstate 90/94 between mile markers 49 and 76.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a large, extremely dangerous and potentially deadly
tornado is on the ground. To protect your life, TAKE COVER NOW! Move
to a basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4374 9034 4404 9039 4414 8960 4375 8960
TIME...MOT...LOC 1933Z 256DEG 34KT 4395 9001 

TORNADO...OBSERVED
TORNADO DAMAGE THREAT...CONSIDERABLE
MAX HAIL SIZE...1.25 IN

$$

DTJ

444 
WWUS53 KARX 111950
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
250 PM CDT Wed Aug 11 2021

WIC001-057-081-112015-
/O.CON.KARX.TO.W.0011.000000T0000Z-210811T2015Z/
Juneau WI-Adams WI-Monroe WI-
250 PM CDT Wed Aug 11 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CDT FOR SOUTHERN
JUNEAU...ADAMS AND EAST CENTRAL MONROE COUNTIES...
    
At 247 PM CDT, a confirm tornado was located near Adams, or near 
Friendship, moving east at 35 mph.

HAZARD...Damaging tornado and quarter size hail.

SOURCE...Weather spotters did confirm a tornado with this storm in 
         west central Juneau County.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
southern Juneau, Adams and east central Monroe Counties, including
the following locations... The Town Of Quincy, Highways 13 And 21,
The Necedah Wildlife Refuge, Cutler and Mill Bluff State Park.

This includes Interstate 90/94 between mile markers 49 and 76.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4374 9034 4404 9039 4414 8960 4375 8960
TIME...MOT...LOC 1947Z 270DEG 29KT 4391 8984 

TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN

$$

DTJ

680 
WWUS53 KARX 112004
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
304 PM CDT Wed Aug 11 2021

WIC057-081-112012-
/O.CAN.KARX.TO.W.0011.000000T0000Z-210811T2015Z/
Juneau WI-Monroe WI-
304 PM CDT Wed Aug 11 2021

...THE TORNADO WARNING FOR SOUTHERN JUNEAU AND EAST CENTRAL MONROE
COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 800 PM CDT for central
Wisconsin.

LAT...LON 4375 8975 4412 8977 4414 8960 4375 8960
TIME...MOT...LOC 2002Z 257DEG 29KT 4394 8967 

$$

WIC001-112015-
/O.CON.KARX.TO.W.0011.000000T0000Z-210811T2015Z/
Adams WI-
304 PM CDT Wed Aug 11 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CDT FOR EASTERN
ADAMS COUNTY...
    
At 302 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles east of Adams, or 7 miles east of Friendship, 
moving east at 35 mph. Unconfirmed report of a tornado occurred at 
252pm 6 miles west of Grand Marsh in Adams County.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Colburn, Brooks, County Roads A And B, County Roads G And M, The
Colburn Wildlife Area, Coons Deep Lake Campground, County Roads C And
G, County Roads E And G, The Preston Cliffs, Grand Marsh, Highway 21
And County G, The Ship Rock Wayside and Highway 82 And County B.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4375 8975 4412 8977 4414 8960 4375 8960
TIME...MOT...LOC 2002Z 257DEG 29KT 4394 8967 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

DTJ

102 
WWUS53 KARX 112010
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
310 PM CDT Wed Aug 11 2021

WIC001-112019-
/O.EXP.KARX.TO.W.0011.000000T0000Z-210811T2015Z/
Adams WI-
310 PM CDT Wed Aug 11 2021

...THE TORNADO WARNING FOR EASTERN ADAMS COUNTY WILL EXPIRE AT 315 PM
CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 800 PM CDT for central
Wisconsin.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
La Crosse.

LAT...LON 4375 8975 4412 8977 4414 8960 4375 8960
TIME...MOT...LOC 2009Z 257DEG 29KT 4395 8960 

$$

DTJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 9:19 PM CDT	River Flood Warning	ARX	La Crosse, Trempealeau	30 hr
Aug 11, 11:32 AM CDT	Special Weather Statement	ARX	Taylor	28 min
Aug 11, 11:57 AM CDT	Special Weather Statement	ARX	Clark, Taylor	33 min
Aug 11, 12:18 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	42 min
Aug 11, 12:31 PM CDT	Special Weather Statement	ARX	Clark, Jackson, La Crosse, Monroe	59 min
Aug 11, 1:01 PM CDT	Tornado Warning	ARX	Clark	17 min
Aug 11, 1:07 PM CDT	Severe Thunderstorm Warning	ARX	La Crosse, Monroe	38 min
Aug 11, 1:41 PM CDT	Severe Thunderstorm Warning	ARX	Juneau, Monroe	64 min
Aug 11, 1:48 PM CDT	Tornado Warning	ARX	Juneau, Monroe	42 min
Aug 11, 2:06 PM CDT	Severe Thunderstorm Warning	ARX	La Crosse, Monroe	39 min
Aug 11, 2:18 PM CDT	Severe Thunderstorm Warning	ARX	La Crosse, Monroe, Vernon	42 min
Aug 11, 2:32 PM CDT	Severe Thunderstorm Warning	ARX	Monroe	28 min
Aug 11, 3:06 PM CDT	Severe Thunderstorm Warning	ARX	Richland, Vernon	54 min
Aug 11, 4:19 PM CDT	Special Weather Statement	ARX	Grant	26 min
Aug 11, 4:23 PM CDT	Severe Thunderstorm Warning	ARX	Grant	22 min

Nearby

Tornado Warnings in Wisconsin, 2021 Every tornado warning in 2021 Tornadoes 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.