Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 96, NWS La Crosse, WI

August 27, 2021Grant County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Aug 27, 2021, 8:48 PM CDT for Grant County, Wisconsin. It was in force for 42 min. 3 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: Aug 27, 2021, 8:48 PM CDT (01:48 UTC)
Expired: Aug 27, 2021, 9:30 PM CDT
In force: 42 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Grant County, WI

The radar

The La Crosse radar (KARX), 100 km from the middle of the area, began a volume at 01:49 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, 9:20 PM CDT	FUNNEL CLOUD	3 E Mount Hope, WI	FENNIMORE FIRE DEPT SAW A FUNNEL CLOUD BETWEEN MT HOPE AND MT IDA.
Aug 27, 9:20 PM CDT	FUNNEL CLOUD	3 E Mount Hope, WI	FUNNEL CLOUD BETWEEN MOUNT HOPE AND MT. IDA ON RICE ROAD REPORTED BY FENNIMORE FIRE DEPT.
Aug 27, 9:28 PM CDT	FUNNEL CLOUD	4 E Mount Hope, WI	2 REPORTS OF FUNNEL CLOUDS ALONG HWY 18 / MT IDA AREA.

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
Aug 27, 5:15 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.8 hours before the alert went out and 151 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.

157 
WUUS53 KARX 280148
SVRARX
WIC043-280230-
/O.NEW.KARX.SV.W.0096.210828T0148Z-210828T0230Z/

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

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Central Grant County in southwestern Wisconsin...

* Until 930 PM CDT.

* At 848 PM CDT, a severe thunderstorm was located near Bloomington,
  or 11 miles southeast of Prairie Du Chien, moving east at 20 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.

* Locations impacted include...
  Lancaster, Fennimore, Bloomington, Mount Ida, Ellenboro, Mount
  Hope, Patch Grove, Millville, Stitzer, Porters Bridge, Lancaster
  Municipal Airport, Klondyke Secluded Acres and Brodtville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for southwestern
Wisconsin.

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 4291 9108 4301 9105 4301 9102 4304 9096
      4298 9055 4275 9063
TIME...MOT...LOC 0148Z 287DEG 20KT 4294 9096 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Skow

2 follow-up statements

699 
WWUS53 KARX 280210
SVSARX

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

WIC043-280230-
/O.CON.KARX.SV.W.0096.000000T0000Z-210828T0230Z/
Grant WI-
910 PM CDT Fri Aug 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR CENTRAL GRANT COUNTY...

At 909 PM CDT, a severe thunderstorm was located near Lancaster,
moving east at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail. A tornado warning 
         is also embedded within much of this severe thunderstorm 
         warning.

SOURCE...Radar indicated.

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

Locations impacted include...
Fennimore, Bloomington, Mount Ida, Mount Hope, Patch Grove,
Millville, Klondyke Secluded Acres, Stitzer and Brodtville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for southwestern
Wisconsin.

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 4291 9108 4301 9105 4301 9102 4304 9096
      4298 9055 4286 9059 4288 9099
TIME...MOT...LOC 0209Z 287DEG 20KT 4290 9080 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Skow

923 
WWUS53 KARX 280220
SVSARX

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

WIC043-280230-
/O.EXP.KARX.SV.W.0096.000000T0000Z-210828T0230Z/
Grant WI-
920 PM CDT Fri Aug 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL GRANT COUNTY WILL
EXPIRE AT 930 PM 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 heavy rain
is still possible with this thunderstorm.

A Tornado Watch remains in effect until 1100 PM CDT for southwestern
Wisconsin.

LAT...LON 4291 9108 4301 9105 4301 9102 4304 9096
      4298 9055 4286 9059 4288 9099
TIME...MOT...LOC 0220Z 287DEG 20KT 4288 9073 

$$

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, 8:59 PM CDT	Tornado Warning	ARX	Grant	31 min
Aug 27, 11:24 PM CDT	Special Weather Statement	ARX	Vernon	36 min
Aug 27, 11:31 PM CDT	Severe Thunderstorm Warning	ARX	Richland, Vernon	59 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.