Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 26, NWS La Crosse, WI

September 13, 1994Trempealeau County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Sep 13, 1994, 4:49 PM CDT for Trempealeau County, Wisconsin. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Sep 13, 1994, 4:49 PM CDT (21:49 UTC)
Expired
Sep 13, 1994, 5:45 PM CDT
In force
56 min
Issued by
NWS La Crosse, WI
Area
Whole counties

County Trempealeau County, WI

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 9.8 hours before the alert went out and 188 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 1994-09-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 867 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 1994-09-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 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
867 J/kg
Mixed-layer CIN
-238 J/kg
Mixed-layer LCL
921 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Sep 13, 3:37 PM CDT, 1 hour 12 minutes before
WIZ041-132145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
337 PM CDT TUE SEP 13 1994

TEST...TEST...TEST...

THIS IS A COMMUNICATIONS TEST ONLY.

BRUCE

NNNN
Special weather statement, Sep 13, 3:45 PM CDT, 1 hour 4 minutes before
WIZ032>034-041-042-053-054-132300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
345 PM CDT TUE SEP 13 1994

...THUNDERSTORMS DEVELOPING NORTHWEST OF LA CROSSE...

AT 340 PM...RADAR INDICATED STRONG THUNDERSTORMS NEAR ALMA AND NELSON
OR ABOUT 50 MILES NORTHWEST OF LA CROSSE. THESE STORMS WERE MOVING TO
THE EAST SOUTHEAST AT 30 MILES AN HOUR AND WILL BE AFFECTING AREAS TO
THE NORTH AND WEST OF LA CROSSE BETWEEN 345 AND 600 PM.

HEAVY RAINS AND DEADLY LIGHTNING WILL OCCUR WITH THESE STORMS AND
THERE IS ALSO A CHANCE OF SMALL HAIL AND BRIEF GUSTY WINDS. PERSONS
SHOULD STAY INDOORS UNTIL THESE STORMS PASS AND STAY TUNED TO
WEATHER RADIO FOR LATER UPDATES CONCERNING THE STORMS.

ALBRECHT

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 13, 4:58 PM CDTSevere Thunderstorm WarningARXJackson62 min
Sep 13, 5:26 PM CDTSevere Thunderstorm WarningARXLa Crosse, Monroe64 min
Sep 13, 5:56 PM CDTSevere Thunderstorm WarningARXLa Crosse64 min
Sep 13, 6:19 PM CDTSevere Thunderstorm WarningARXMonroe41 min
Sep 13, 6:19 PM CDTSevere Thunderstorm WarningARXVernon56 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1994Every severe thunderstorm warning in 1994

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.