Alert archive / Wisconsin / Tornado Warnings in 2021

Tornado Warning 2, NWS La Crosse, WI

July 6, 2021Jackson County, La Crosse County, Monroe County, Wisconsin

NWS La Crosse, WI issued this tornado warning at Jul 6, 2021, 4:01 PM CDT for Jackson County, La Crosse County, Monroe County, Wisconsin. It was in force for 17 min. 1 report 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: Jul 6, 2021, 4:01 PM CDT (21:01 UTC)
Expired: Jul 6, 2021, 4:18 PM CDT
In force: 17 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.5 in

Counties Jackson County, WI, La Crosse County, WI, Monroe County, WI

The radar

The La Crosse radar (KARX), 26 km from the middle of the area, began a volume at 20:59 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
Jul 6, 4:09 PM CDT	TSTM WND DMG	Stevenstown, WI	SEVERAL TREES DOWN, TIME ESTIMATED WITH RADAR.

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
Jul 6, 2:01 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.0 hours before the alert went out and 215 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: 214 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1752 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

845 
WFUS53 KARX 062101
TORARX
WIC053-063-081-062145-
/O.NEW.KARX.TO.W.0002.210706T2101Z-210706T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
401 PM CDT Tue Jul 6 2021

The National Weather Service in La Crosse has issued a

* Tornado Warning for...
  Northeastern La Crosse County in west central Wisconsin...
  Southwestern Jackson County in west central Wisconsin...
  Northwestern Monroe County in west central Wisconsin...

* Until 445 PM CDT.
    
* At 401 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near North Bend, or 14 miles north of La Crosse, moving
  east at 25 mph.

  HAZARD...Tornado and ping pong ball 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.

* This dangerous storm will be near...
  North Bend around 410 PM CDT.

Other locations impacted by this tornadic thunderstorm include County
Roads M And W, Mindoro Cut, Melrose, Severson Coulee, Mindoro,
Stevenstown and Lost Falls Campground.

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 4396 9091 4397 9121 4406 9124 4406 9123
      4405 9122 4406 9122 4407 9121 4409 9117
      4408 9115 4409 9115 4418 9091
TIME...MOT...LOC 2101Z 260DEG 21KT 4403 9116 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

Skow

2 follow-up statements

923 
WWUS53 KARX 062115
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
415 PM CDT Tue Jul 6 2021

WIC053-063-081-062145-
/O.CON.KARX.TO.W.0002.000000T0000Z-210706T2145Z/
La Crosse WI-Jackson WI-Monroe WI-
415 PM CDT Tue Jul 6 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR
NORTHEASTERN LA CROSSE...SOUTHWESTERN JACKSON AND NORTHWESTERN MONROE
COUNTIES...
    
At 415 PM CDT, a severe thunderstorm capable of producing a tornado
was located near North Bend, or 13 miles northwest of Sparta, moving
east at 25 mph.

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.

This tornadic thunderstorm will remain over mainly rural areas of
northeastern La Crosse, southwestern Jackson and northwestern Monroe
Counties.

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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4396 9091 4397 9117 4406 9122 4408 9115
      4409 9115 4418 9091
TIME...MOT...LOC 2115Z 260DEG 21KT 4404 9105 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Skow

968 
WWUS53 KARX 062118
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
418 PM CDT Tue Jul 6 2021

WIC053-063-081-062128-
/O.CAN.KARX.TO.W.0002.000000T0000Z-210706T2145Z/
La Crosse WI-Jackson WI-Monroe WI-
418 PM CDT Tue Jul 6 2021

...THE TORNADO WARNING FOR NORTHEASTERN LA CROSSE...SOUTHWESTERN
JACKSON AND NORTHWESTERN MONROE COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
west central Wisconsin.

LAT...LON 4396 9091 4397 9117 4406 9122 4408 9115
      4409 9115 4418 9091
TIME...MOT...LOC 2117Z 260DEG 21KT 4404 9102 

$$

Skow

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 1:37 PM CDT	Special Weather Statement	ARX	Buffalo	53 min
Jul 6, 2:01 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	21 min
Jul 6, 3:23 PM CDT	Severe Thunderstorm Warning	ARX	Clark	52 min
Jul 6, 3:33 PM CDT	Severe Thunderstorm Warning	ARX	La Crosse, Trempealeau	42 min
Jul 6, 5:01 PM CDT	Special Weather Statement	ARX	Wood	29 min
Jul 6, 5:43 PM CDT	Special Weather Statement	ARX	La Crosse	32 min
Jul 6, 6:05 PM CDT	Special Weather Statement	ARX	Buffalo	25 min
Jul 6, 6:40 PM CDT	Special Weather Statement	ARX	Buffalo	35 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.