Alert archive / Minnesota / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 53, NWS La Crosse, WI

October 17, 1996Mower County, Olmsted County, Minnesota

NWS La Crosse, WI issued this severe thunderstorm warning at Oct 17, 1996, 2:23 AM CDT for Mower County, Olmsted County, Minnesota. It was in force for 37 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
Oct 17, 1996, 2:23 AM CDT (07:23 UTC)
Expired
Oct 17, 1996, 3:00 AM CDT
In force
37 min
Issued by
NWS La Crosse, WI
Area
Whole counties

Counties Mower County, MN, Olmsted County, MN

The radar

The La Crosse radar (KARX), 111 km from the middle of the area, began a volume at 07:27 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 7.4 hours before the alert went out and 139 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 00:00Z on 1996-10-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 809 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 00:00Z on 1996-10-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 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
809 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
1117 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
200 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLSE 170723
SVRLSE
MNC099-109-170800-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
223 AM CDT THU OCT 17 1996
 
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  300 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST MINNESOTA
 
   ...NORTHERN MOWER COUNTY...OLMSTED COUNTY
 
AT 223 AM...RADAR INDICATED A SEVERE THUNDERSTORM 25 MILES SOUTH OF
ROCHESTER OR JUST SOUTHWEST OF GRAND MEADOW. THE STORM WAS MOVING
NORTHEAST AT 40 MILES AN HOUR AND WILL AFFECT STEWARTVILLE AROUND
235 AM AND PREDMORE AROUND 245 AM.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING. HAIL 3/4 OF AN INCH OR LARGER IN DIAMETER AND
DEADLY LIGHTNING CAN BE EXPECTED WITH THIS STORM.
 
THOMPSON

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 17, 1:48 AM CDTSevere Thunderstorm WarningARXMower42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1996Every severe thunderstorm warning in 1996

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.