Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 113, NWS La Crosse, WI

June 18, 2001Vernon County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jun 18, 2001, 10:55 PM CDT for Vernon County, Wisconsin. It was in force for 65 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 18, 2001, 10:55 PM CDT (03:55 UTC)
Expired: Jun 19, 2001, 12:00 AM CDT
In force: 65 min
Issued by: NWS La Crosse, WI
Area: Whole counties

County Vernon County, WI

The radar

The La Crosse radar (KARX), 38 km from the middle of the area, began a volume at 03:55 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
Jun 18, 11:05 PM CDT	Thunderstorm Wind 54 E	Viroqua, WI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 18, 7:45 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.9 hours before the alert went out and 221 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: 414 J/kg
Mixed-layer CIN: -251 J/kg
Mixed-layer LCL: 2326 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS53 KARX 190354
SVRLSE

WIC123-190500-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1055 PM CDT MON JUN 18 2001

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  VERNON COUNTY IN SOUTHWEST WISCONSIN

* UNTIL MIDNIGHT CDT

* AT 1055 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM PRODUCING LARGE HAIL 18 MILES SOUTHWEST OF COON
  VALLEY...OR ABOUT 11 MILES NORTH OF LANSING...MOVING EAST AT 55
  MPH.

* THE SEVERE THUNDERSTORM IS EXPECTED TO BE...
  NEAR COON VALLEY AT 1105 PM CDT...
  NEAR VIROQUA AT 1110 PM CDT...
  NEAR WESTBY AT 1115 PM CDT...
  NEAR LA FARGE AT 1125 PM CDT...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT TUESDAY MORNING
FOR SOUTHEAST MINNESOTA AND WESTERN WISCONSIN.

LARGE DESTRUCTIVE HAIL IS THE MAIN THREAT WITH THESE STORMS. FOR YOUR
PROTECTION...SEEK SHELTER IN A STURDY BUILDING AND STAY AWAY FROM
WINDOWS.

$$

BAUMGARDT

LAT...LON 4362 9124 4344 9121 4343 9077 4372 9036
          4373 9101

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 7:43 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	62 min
Jun 18, 8:04 PM CDT	Severe Thunderstorm Warning	ARX	Clark	56 min
Jun 18, 8:29 PM CDT	Tornado Warning	ARX	Trempealeau	31 min
Jun 18, 8:36 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	54 min
Jun 18, 10:03 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Taylor	42 min
Jun 18, 10:25 PM CDT	Severe Thunderstorm Warning	ARX	Trempealeau	35 min
Jun 18, 11:33 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	57 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.