Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 97, NWS La Crosse, WI

August 27, 2021Richland County, Vernon County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Aug 27, 2021, 11:31 PM CDT for Richland County, Vernon County, Wisconsin. It was in force for 59 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: Aug 27, 2021, 11:31 PM CDT (04:31 UTC)
Expired: Aug 28, 2021, 12:30 AM CDT
In force: 59 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Richland County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 67 km from the middle of the area, began a volume at 04:31 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
Aug 27, 11:40 PM CDT	TSTM WND DMG	1 Wnw Viola, WI	SEVERAL REPORTS OF TREES AND POWERLINES DOWN ALONG HIGHWAY 56 AROUND LIBERTY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 4.5 hours before the alert went out and 208 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: 995 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1707 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 148 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

728 
WUUS53 KARX 280431
SVRARX
WIC103-123-280530-
/O.NEW.KARX.SV.W.0097.210828T0431Z-210828T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
1131 PM CDT Fri Aug 27 2021

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Southeastern Vernon County in southwestern Wisconsin...
  Northern Richland County in southwestern Wisconsin...

* Until 1230 AM CDT.

* At 1131 PM CDT, a severe thunderstorm was located near Viroqua,
  moving east at 30 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Viroqua, La Farge, Germantown, Rockbridge, Viola, Sylvan, Liberty,
  and Readstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4342 9062 4342 9068 4345 9092 4362 9086
      4360 9031 4355 9031 4355 9019 4353 9019
      4337 9020
TIME...MOT...LOC 0431Z 273DEG 27KT 4353 9076 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Skow

4 follow-up statements

823 
WWUS53 KARX 280448
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1148 PM CDT Fri Aug 27 2021

WIC103-123-280530-
/O.CON.KARX.SV.W.0097.000000T0000Z-210828T0530Z/
Vernon WI-Richland WI-
1148 PM CDT Fri Aug 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR SOUTHEASTERN VERNON AND NORTHERN RICHLAND COUNTIES...

At 1148 PM CDT, a severe thunderstorm was located 9 miles south of La
Farge, or 14 miles southeast of Viroqua, moving east at 30 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Germantown, Rockbridge, Viola, Sylvan, and Liberty.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4342 9062 4342 9068 4344 9083 4356 9072
      4355 9031 4355 9019 4353 9019 4337 9020
TIME...MOT...LOC 0448Z 279DEG 26KT 4344 9064 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Skow

334 
WWUS53 KARX 280459
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1159 PM CDT Fri Aug 27 2021

WIC123-280509-
/O.CAN.KARX.SV.W.0097.000000T0000Z-210828T0530Z/
Vernon WI-
1159 PM CDT Fri Aug 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN VERNON COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4342 9062 4343 9066 4355 9059 4355 9019
      4353 9019 4337 9020
TIME...MOT...LOC 0459Z 273DEG 27KT 4344 9053 

$$

WIC103-280530-
/O.CON.KARX.SV.W.0097.000000T0000Z-210828T0530Z/
Richland WI-
1159 PM CDT Fri Aug 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR NORTHERN RICHLAND COUNTY...

At 1159 PM CDT, a severe thunderstorm was located 9 miles northwest
of Richland Center, moving east at 30 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Germantown, Rockbridge, Sylvan, Cazenovia, and Yuba.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4342 9062 4343 9066 4355 9059 4355 9019
      4353 9019 4337 9020
TIME...MOT...LOC 0459Z 273DEG 27KT 4344 9053 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Skow

866 
WWUS53 KARX 280512
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1212 AM CDT Sat Aug 28 2021

WIC103-280530-
/O.CON.KARX.SV.W.0097.000000T0000Z-210828T0530Z/
Richland WI-
1212 AM CDT Sat Aug 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR NORTHEASTERN RICHLAND COUNTY...

At 1212 AM CDT, a severe thunderstorm was located near Richland
Center, moving east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Germantown, Rockbridge, Cazenovia, and Yuba.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4341 9056 4355 9042 4355 9019 4353 9019
      4337 9020
TIME...MOT...LOC 0512Z 273DEG 27KT 4343 9039 

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

$$

Skow

495 
WWUS53 KARX 280521
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1221 AM CDT Sat Aug 28 2021

WIC103-280530-
/O.EXP.KARX.SV.W.0097.000000T0000Z-210828T0530Z/
Richland WI-
1221 AM CDT Sat Aug 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN RICHLAND COUNTY
WILL EXPIRE AT 1230 AM CDT...
                
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 will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 4341 9056 4355 9042 4355 9019 4353 9019
      4337 9020
TIME...MOT...LOC 0520Z 273DEG 27KT 4343 9032 

$$

Skow

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 7:38 PM CDT	Flash Flood Watch	ARX	Crawford, Richland, Vernon	18 hr
Aug 27, 8:03 PM CDT	Severe Thunderstorm Warning	ARX	Crawford, Grant	42 min
Aug 27, 8:48 PM CDT	Severe Thunderstorm Warning	ARX	Grant	42 min
Aug 27, 8:59 PM CDT	Tornado Warning	ARX	Grant	31 min
Aug 27, 11:24 PM CDT	Special Weather Statement	ARX	Vernon	36 min
Aug 27, 11:41 PM CDT	Flash Flood Warning	ARX	Vernon	4 hr
Aug 27, 11:53 PM CDT	Severe Thunderstorm Warning	ARX	Richland	37 min
Aug 28, 1:40 AM CDT	Severe Thunderstorm Warning	ARX	Crawford, Richland	49 min
Aug 28, 3:15 AM CDT	River Flood Warning	ARX	La Crosse, Trempealeau	5 days
Aug 28, 4:14 AM CDT	River Flood Warning	ARX	Vernon	31 hr
Aug 28, 10:24 AM CDT	River Flood Warning	ARX	Crawford	4 days
Aug 28, 10:38 AM CDT	River Flood Watch	ARX	Juneau	22 hr
Aug 28, 10:46 AM CDT	River Flood Watch	ARX	Crawford	23 hr

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.