Alert archive / Wisconsin / Tornado Warnings in 1998

Tornado Warning 40, NWS La Crosse, WI

September 26, 1998Clark County, Wisconsin

NWS La Crosse, WI issued this tornado warning at Sep 26, 1998, 1:44 AM CDT for Clark County, Wisconsin. It was in force for 46 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
Sep 26, 1998, 1:44 AM CDT (06:44 UTC)
Expired
Sep 26, 1998, 2:30 AM CDT
In force
46 min
Issued by
NWS La Crosse, WI
Area
Whole counties

County Clark County, WI

The radar

The La Crosse radar (KARX), 111 km from the middle of the area, began a volume at 06:45 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 watch it was issued in

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

IssuedProductOfficeLasted
Sep 26, 12:00 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 6.7 hours before the alert went out and 201 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, Green Bay/Straub, WI at 00:00Z on 1998-09-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 775 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, Green Bay/Straub, WI at 00:00Z on 1998-09-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 97 square meters per square second.1939587897Sfc1 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
775 J/kg
Mixed-layer CIN
-80 J/kg
Mixed-layer LCL
1020 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
97 m²/s²
0-3 km storm-relative helicity
146 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

417 
WFUS1 KLSE 260645 RRA
TORLSE
WIC019-260730-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
144 AM CDT SAT SEP 26 1998

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN CLARK COUNTY IN CENTRAL WISCONSIN

* UNTIL 230 AM CDT

* AT 142 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING TORNADO 30 MILES EAST OF EAU CLAIRE...5 MILES
  SOUTHWEST OF LONGWOOD...MOVING EAST AT 30 MPH.

* THE TORNADO WILL BE NEAR...
  RIPLINGER BY 215 AM

THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT WAS IN
EFFECT FOR NORTHERN CLARK COUNTY UNTIL 230 AM.

IF YOU ARE IN A MULTIPLE STORY BUILDING...GO TO A SMALL INTERIOR
ROOM AWAY FROM WINDOWS.

RIECK/NELSON

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 26, 12:30 AM CDTSevere Thunderstorm WarningARXClark60 min
Sep 26, 1:28 AM CDTSevere Thunderstorm WarningARXClark62 min
Sep 26, 2:56 AM CDTSevere Thunderstorm WarningARXTaylor54 min
Sep 26, 5:45 AM CDTSevere Thunderstorm WarningARXBuffalo30 min
Sep 26, 6:09 AM CDTSevere Thunderstorm WarningARXBuffalo61 min
Sep 26, 7:10 AM CDTSevere Thunderstorm WarningARXTaylor35 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; radar from the NEXRAD Level II archive.