Alert archive / Wisconsin / Tornado Warnings in 1998

Tornado Warning 22, NWS La Crosse, WI

June 20, 1998Vernon County, Wisconsin

NWS La Crosse, WI issued this tornado warning at Jun 20, 1998, 6:09 PM CDT for Vernon County, Wisconsin. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 20, 1998, 6:09 PM CDT (23:09 UTC)
Expired
Jun 20, 1998, 7:00 PM CDT
In force
51 min
Issued by
NWS La Crosse, WI
Area
Whole counties

County Vernon County, WI

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 20, 1:45 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.2 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-pSkew-T log-p diagram, Davenport, at 12:00Z on 1998-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 110 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, Davenport, at 12:00Z on 1998-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 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
110 J/kg
Mixed-layer CIN
-232 J/kg
Mixed-layer LCL
2029 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

775 
WFUS1 KLSE 202312 RRB
TORLSE
WIC123-210000-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING...CORRECTED UGC EXPIRATION CODING
NATIONAL WEATHER SERVICE LA CROSSE WI
609 PM CDT SAT JUN 20 1998

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* TORNADO WARNING FOR...
  VERNON COUNTY IN SOUTHWESTERN WISCONSIN

* UNTIL 700 PM CDT

* AT 607 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO JUST NORTH OF WESTBY OR 25 MILES SOUTHEAST OF LA CROSSE...
  MOVING EAST AT 25 MPH.

* THE TORNADO WILL BE NEAR...
  LA FARGE AROUND 620 PM CDT
GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR

TMC/KRC

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 4:50 PM CDTSevere Thunderstorm WarningARXCrawford, Vernon60 min
Jun 20, 5:35 PM CDTSevere Thunderstorm WarningARXGrant60 min
Jun 20, 5:44 PM CDTSevere Thunderstorm WarningARXRichland61 min
Jun 20, 5:48 PM CDTSevere Thunderstorm WarningARXCrawford, Vernon57 min
Jun 20, 6:34 PM CDTSevere Thunderstorm WarningARXGrant16 min
Jun 20, 6:42 PM CDTSevere Thunderstorm WarningARXRichland63 min

Nearby

Tornado Warnings in Wisconsin, 1998Every tornado warning in 1998Tornadoes in 1998

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.