Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 63, NWS La Crosse, WI

July 28, 2021Jackson County, Monroe County, Trempealeau County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 28, 2021, 11:19 PM CDT for Jackson County, Monroe County, Trempealeau County, Wisconsin. It was in force for 26 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: Jul 28, 2021, 11:19 PM CDT (04:19 UTC)
Expired: Jul 28, 2021, 11:45 PM CDT
In force: 26 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Jackson County, WI, Monroe County, WI, Trempealeau County, WI

The radar

The La Crosse radar (KARX), 37 km from the middle of the area, began a volume at 04:17 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
Jul 28, 7:17 PM CDT	Severe Thunderstorm Watch PDS	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.3 hours before the alert went out and 204 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: 4815 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1185 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 374 m²/s²
0-3 km storm-relative helicity: 461 m²/s²
Significant tornado parameter: 8.9
Supercell composite: 48.1

Open this sounding in Storm Lab

The text

As transmitted.

060 
WUUS53 KARX 290419
SVRARX
WIC053-081-121-290445-
/O.NEW.KARX.SV.W.0063.210729T0419Z-210729T0445Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
1119 PM CDT Wed Jul 28 2021

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Southwestern Jackson County in west central Wisconsin...
  Northwestern Monroe County in west central Wisconsin...
  Southern Trempealeau County in west central Wisconsin...

* Until 1145 PM CDT.

* At 1119 PM CDT, a severe thunderstorm was located near Blair, or 10
  miles southeast of Whitehall, moving southeast at 60 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  North Bend around 1130 PM CDT.

Other locations impacted by this severe thunderstorm include
Franklin, Hixton, Highway 95 And County D, Melrose, Taylor, Beach
Corners and Thimble Park.

This includes Interstate 94 between mile markers 104 and 111.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4407 9115 4409 9119 4407 9121 4407 9135
      4424 9154 4428 9153 4443 9091 4407 9090
TIME...MOT...LOC 0419Z 310DEG 52KT 4425 9120 

HAIL...1.00IN
WIND...60MPH
 
$$

Rieck

1 follow-up statement

217 
WWUS53 KARX 290450
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1150 PM CDT Wed Jul 28 2021

WIC053-081-121-290459-
/O.EXP.KARX.SV.W.0063.000000T0000Z-210729T0445Z/
Jackson WI-Monroe WI-Trempealeau WI-
1150 PM CDT Wed Jul 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN JACKSON...
NORTHWESTERN MONROE AND SOUTHERN TREMPEALEAU COUNTIES HAS EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
west central Wisconsin.

LAT...LON 4407 9115 4409 9119 4407 9121 4407 9135
      4424 9154 4428 9153 4443 9091 4407 9090
TIME...MOT...LOC 0449Z 310DEG 52KT 4398 9075 

$$

Rieck

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 7:09 PM CDT	Special Weather Statement	ARX	Taylor	51 min
Jul 28, 8:19 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	56 min
Jul 28, 9:32 PM CDT	Severe Thunderstorm Warning	ARX	Clark	43 min
Jul 28, 9:48 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Jackson	57 min
Jul 28, 10:44 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	46 min
Jul 28, 10:45 PM CDT	Special Weather Statement	ARX	Adams, Jackson, Juneau	60 min
Jul 28, 11:37 PM CDT	Special Weather Statement	ARX	La Crosse, Monroe	53 min
Jul 28, 11:54 PM CDT	Areal Flood Advisory	ARX	La Crosse	79 min
Jul 29, 12:26 AM CDT	Special Weather Statement	ARX	Crawford, Grant	94 min
Jul 29, 1:39 AM CDT	Special Weather Statement	ARX	Grant	66 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.