Alert archive / Minnesota / Tornado Warnings in 1998

Tornado Warning 18, NWS La Crosse, WI

June 20, 1998Mower County, Minnesota

NWS La Crosse, WI issued this tornado warning at Jun 20, 1998, 1:56 PM CDT for Mower County, Minnesota. It was in force for 44 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, 1:56 PM CDT (18:56 UTC)
Expired
Jun 20, 1998, 2:40 PM CDT
In force
44 min
Issued by
NWS La Crosse, WI
Area
Whole counties

County Mower County, MN

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 6.9 hours before the alert went out and 147 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 1998-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 18 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 1998-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 416 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
18 J/kg
Mixed-layer CIN
-384 J/kg
Mixed-layer LCL
2049 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
416 m²/s²
0-3 km storm-relative helicity
589 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.1

Open this sounding in Storm Lab

The text

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

055 
WFUS1 KLSE 201859 RRA
TORLSE
MNC099-201940-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
156 PM CDT SAT JUN 20 1998

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* TORNADO WARNING FOR...
  MOWER COUNTY IN SOUTHEASTERN MINNESOTA

* UNTIL 240 PM CDT

* AT 155 PM CDT ...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A TORNADO 25 MILES SOUTHWEST OF ROCHESTER OR NEAR DEXTER...MOVING
  EAST AT 25 MPH.


* THE TORNADO WILL BE NEAR...
  GRAND MEADOW AROUND 210 PM CDT
  RACINE AROUND 220 PM CDT

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL...DAMAGING
WINDS AND HEAVY RAIN. 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, 12:43 PM CDTSevere Thunderstorm WarningARXDodge, Mower77 min
Jun 20, 1:13 PM CDTTornado WarningARXDodge, Mower47 min
Jun 20, 1:46 PM CDTTornado WarningARXFillmore, Olmsted64 min
Jun 20, 2:11 PM CDTFlash Flood WarningARXMower2 hr
Jun 20, 2:40 PM CDTSevere Thunderstorm WarningARXMower30 min
Jun 20, 2:49 PM CDTTornado WarningARXFillmore61 min
Jun 20, 3:25 PM CDTTornado WarningARXFillmore60 min
Jun 20, 4:00 PM CDTSevere Thunderstorm WarningARXHouston60 min
Jun 20, 4:25 PM CDTTornado WarningARXHouston60 min

Nearby

Tornado Warnings in Minnesota, 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.