Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 65, NWS La Crosse, WI

August 7, 2021Houston County, Minnesota; La Crosse County, Vernon County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Aug 7, 2021, 11:24 AM CDT for Houston County, Minnesota; La Crosse County, Vernon County, Wisconsin. It was in force for 27 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 7, 2021, 11:24 AM CDT (16:24 UTC)
Expired
Aug 7, 2021, 11:51 AM CDT
In force
27 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Houston County, MN, La Crosse County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 8 km from the middle of the area, began a volume at 16:28 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 nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 4.4 hours before the alert went out and 249 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-pSkew-T log-p diagram, Davenport, at 12:00Z on 2021-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1645 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2021-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1645 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
1006 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

166 
WUUS53 KARX 071624
SVRARX
MNC055-WIC063-123-071715-
/O.NEW.KARX.SV.W.0065.210807T1624Z-210807T1715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
1124 AM CDT Sat Aug 7 2021

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Northeastern Houston County in southeastern Minnesota...
  Southeastern La Crosse County in west central Wisconsin...
  Northwestern Vernon County in southwestern Wisconsin...

* Until 1215 PM CDT.

* At 1124 AM CDT, a severe thunderstorm was located near Hokah, or 7
  miles northeast of Caledonia, moving northeast at 30 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  La Crosse, La Crescent, Caledonia, Onalaska, West Salem, Bangor,
  Stoddard, Coon Valley, Hokah, Brownsville, French Island, La Crosse
  Airport, Medary, Burns, Mound Prairie, County Roads G And H,
  Brinkman Ridge, Irish Hill, North Side Of La Crosse and South Side
  Of La Crosse.

This includes Interstate 90 in Wisconsin between mile markers 1 and
18.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4362 9147 4374 9155 4385 9131 4385 9129
      4386 9128 4401 9096 4373 9091
TIME...MOT...LOC 1624Z 245DEG 26KT 4372 9140 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Skow
2 follow-up statements
801 
WWUS53 KARX 071644
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1144 AM CDT Sat Aug 7 2021

MNC055-WIC063-123-071715-
/O.CON.KARX.SV.W.0065.000000T0000Z-210807T1715Z/
Houston MN-La Crosse WI-Vernon WI-
1144 AM CDT Sat Aug 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR EAST CENTRAL HOUSTON...SOUTHEASTERN LA CROSSE AND NORTHWESTERN
VERNON COUNTIES...

At 1143 AM CDT, a severe thunderstorm was located near La Crosse,
moving northeast at 30 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
La Crosse, West Salem, Bangor, Brownsville, and Mount La Crosse.

This includes Interstate 90 in Wisconsin between mile markers 12 and
18.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4366 9129 4378 9132 4396 9095 4373 9091
TIME...MOT...LOC 1643Z 245DEG 26KT 4378 9122 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Skow
357 
WWUS53 KARX 071651
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1151 AM CDT Sat Aug 7 2021

MNC055-WIC063-123-071701-
/O.CAN.KARX.SV.W.0065.000000T0000Z-210807T1715Z/
Houston MN-La Crosse WI-Vernon WI-
1151 AM CDT Sat Aug 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL HOUSTON...
SOUTHEASTERN LA CROSSE AND NORTHWESTERN VERNON COUNTIES IS
CANCELLED...
                
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 cancelled.  However heavy rain is
still possible with this thunderstorm.

LAT...LON 4366 9129 4378 9132 4396 9095 4373 9091
TIME...MOT...LOC 1649Z 245DEG 26KT 4381 9114 

$$

Skow

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 7:21 AM CDTSpecial Weather StatementARXWinona24 min
Aug 7, 10:29 AM CDTSpecial Weather StatementARXOlmsted31 min
Aug 7, 10:33 AM CDTSevere Thunderstorm WarningARXDodge, Olmsted, Wabasha42 min
Aug 7, 11:14 AM CDTSpecial Weather StatementARXWabasha31 min
Aug 7, 12:12 PM CDTSpecial Weather StatementARXWabasha18 min
Aug 7, 12:23 PM CDTSpecial Weather StatementARXOlmsted37 min
Aug 7, 12:59 PM CDTAreal Flood AdvisoryARXOlmsted, Wabasha, Winona2 hr
Aug 7, 2:23 PM CDTAreal Flood AdvisoryARXWinona112 min
Aug 7, 3:07 PM CDTAreal Flood AdvisoryARXHouston74 min
Aug 7, 6:18 PM CDTFlash Flood WatchARXFillmore, Houston, Olmsted, Wabasha, Winona35 hr
Aug 7, 6:26 AM CDTSpecial Weather StatementARXBuffalo34 min
Aug 7, 7:40 AM CDTSpecial Weather StatementARXLa Crosse35 min
Aug 7, 9:17 AM CDTSpecial Weather StatementARXJuneau28 min
Aug 7, 10:12 AM CDTSpecial Weather StatementARXAdams33 min
Aug 7, 11:17 AM CDTSpecial Weather StatementARXCrawford28 min
Aug 7, 11:26 AM CDTSevere Thunderstorm WarningARXCrawford, Richland, Vernon21 min
Aug 7, 12:19 PM CDTSpecial Weather StatementARXRichland26 min
Aug 7, 1:17 PM CDTSevere Thunderstorm WarningARXRichland, Vernon58 min
Aug 7, 1:48 PM CDTSpecial Weather StatementARXLa Crosse27 min
Aug 7, 2:14 PM CDTSpecial Weather StatementARXLa Crosse31 min
Aug 7, 3:02 PM CDTRiver Flood WarningARXMonroe, Vernon21 days
Aug 7, 3:02 PM CDTRiver Flood WarningARXVernon4 days
Aug 7, 3:02 PM CDTRiver Flood WarningARXRichland, Vernon4 days
Aug 7, 3:02 PM CDTRiver Flood WarningARXRichland, Vernon61 hr
Aug 7, 3:02 PM CDTRiver Flood WarningARXBuffalo, Trempealeau19 hr
Aug 7, 3:17 PM CDTSpecial Weather StatementARXVernon73 min
Aug 7, 3:23 PM CDTFlash Flood WarningARXLa Crosse, Monroe3 hr
Aug 7, 3:35 PM CDTSevere Thunderstorm WarningARXVernon55 min
Aug 7, 3:52 PM CDTSevere Thunderstorm WarningARXCrawford38 min
Aug 7, 4:00 PM CDTTornado WarningARXCrawford30 min
Aug 7, 4:05 PM CDTSevere Thunderstorm WarningARXRichland40 min
Aug 7, 4:19 PM CDTTornado WarningARXCrawford, Grant41 min
Aug 7, 4:27 PM CDTFlash Flood WarningARXVernon3 hr
Aug 7, 4:56 PM CDTTornado Warning Tornado observedARXGrant19 min
Aug 7, 5:53 PM CDTSevere Thunderstorm WarningARXJuneau, Monroe, Vernon37 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2021Severe Thunderstorm Warnings in Minnesota, 2021Every 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.