Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 47, NWS La Crosse, WI

July 6, 2021Buffalo County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 6, 2021, 2:01 PM CDT for Buffalo County, Wisconsin. It was in force for 21 min. 2 reports 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, 2:01 PM CDT (19:01 UTC)
Expired
Jul 6, 2021, 2:22 PM CDT
In force
21 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Buffalo County, WI

The radar

The La Crosse radar (KARX), 91 km from the middle of the area, began a volume at 19:04 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

TimeReportWhereRemark
Jul 6, 2:05 PM CDTTSTM WND DMGModena, WIMULTIPLE TREES DOWN.
Jul 6, 2:15 PM CDTTSTM WND DMGGilmanton, WIMULTIPLE TREES DOWN.

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.

IssuedProductOfficeLasted
Jul 6, 2:01 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.0 hours before the alert went out and 143 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, Minneapolis, MN at 12:00Z on 2021-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 214 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2021-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.1939Sfc1 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
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.

701 
WUUS53 KARX 061901
SVRARX
WIC011-061945-
/O.NEW.KARX.SV.W.0047.210706T1901Z-210706T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
201 PM CDT Tue Jul 6 2021

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Northern Buffalo County in west central Wisconsin...

* Until 245 PM CDT.

* At 200 PM CDT, a severe thunderstorm was located near Modena, or 7
  miles north of Alma, moving east at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Modena around 215 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4459 9202 4459 9201 4460 9181 4459 9153
      4433 9153 4434 9194 4436 9197 4437 9199
TIME...MOT...LOC 1900Z 268DEG 22KT 4445 9190 

HAIL...<.75IN
WIND...60MPH
 
$$

JSB
3 follow-up statements
817 
WWUS53 KARX 061908
SVSARX

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

WIC011-061945-
/O.CON.KARX.SV.W.0047.000000T0000Z-210706T1945Z/
Buffalo WI-
208 PM CDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM CDT
FOR NORTHERN BUFFALO COUNTY...

At 208 PM CDT, a severe thunderstorm was located over Modena, or 10
miles northeast of Alma, moving east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4459 9202 4459 9201 4460 9181 4459 9153
      4433 9153 4434 9194 4436 9197 4437 9199
TIME...MOT...LOC 1908Z 268DEG 24KT 4445 9179 

HAIL...<.75IN
WIND...60MPH
 
$$

JSB
005 
WWUS53 KARX 061914
SVSARX

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

WIC011-061945-
/O.CON.KARX.SV.W.0047.000000T0000Z-210706T1945Z/
Buffalo WI-
214 PM CDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM CDT
FOR NORTHERN BUFFALO COUNTY...

At 214 PM CDT, a severe thunderstorm was located near Modena, or 8
miles southwest of Mondovi, moving east at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4459 9202 4459 9201 4460 9181 4459 9153
      4433 9153 4434 9194 4436 9197 4437 9199
TIME...MOT...LOC 1914Z 268DEG 22KT 4445 9174 

HAIL...<.75IN
WIND...60MPH
 
$$

JSB
055 
WWUS53 KARX 061922
SVSARX

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

WIC011-061932-
/O.CAN.KARX.SV.W.0047.000000T0000Z-210706T1945Z/
Buffalo WI-
222 PM CDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BUFFALO COUNTY 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 gusty winds are
still possible with this thunderstorm.

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

LAT...LON 4459 9202 4459 9201 4460 9181 4459 9153
      4433 9153 4434 9194 4436 9197 4437 9199
TIME...MOT...LOC 1921Z 268DEG 22KT 4445 9167 

$$

JSB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 1:37 PM CDTSpecial Weather StatementARXBuffalo53 min
Jul 6, 3:23 PM CDTSevere Thunderstorm WarningARXClark52 min
Jul 6, 3:33 PM CDTSevere Thunderstorm WarningARXLa Crosse, Trempealeau42 min
Jul 6, 4:01 PM CDTTornado WarningARXJackson, La Crosse, Monroe17 min
Jul 6, 5:01 PM CDTSpecial Weather StatementARXWood29 min
Jul 6, 5:43 PM CDTSpecial Weather StatementARXLa Crosse32 min
Jul 6, 6:05 PM CDTSpecial Weather StatementARXBuffalo25 min
Jul 6, 6:40 PM CDTSpecial Weather StatementARXBuffalo35 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.