Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 234, NWS Twin Cities, MN

October 6, 1997Eau Claire County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Oct 6, 1997, 9:47 AM CDT for Eau Claire County, Wisconsin. It was in force for 33 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 6, 1997, 9:47 AM CDT (14:47 UTC)
Expired
Oct 6, 1997, 10:20 AM CDT
In force
33 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Eau Claire County, WI

The radar

The La Crosse radar (KARX), 101 km from the middle of the area, began a volume at 14:48 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 12:00Z, 2.8 hours before the alert went out and 183 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 1997-10-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1997-10-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2580 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
293 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

400 
WUUS1 KMSP 061449 RRA
SVRMSP
WIC035-061520-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
947 AM CDT MON OCT 6 1997


* SEVERE THUNDERSTORM WARNING FOR
  EASTERN EAU CLAIRE COUNTY - WEST CENTRAL WISCONSIN

* UNTIL 1020 AM CDT

* SOME LOCATIONS AFFECTED
    AUGUSTA
    AREAS NORTH OF AUGUSTA


* AT 935 AM CDT THE PUBLIC REPORTED GOLFBALL SIZE HAIL
  5 MILES SOUTH OF EAU CLAIRE.  THE STORM WAS MOVING EAST
  AT 45 MPH.  A ROOF WAS BLOWN OFF NEAR FALL CREEK AT 940 AM.

THIS IS A DANGEROUS STORM.  STAY INDOORS AWAY FROM WINDOWS.

TDK

&

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1997Every severe thunderstorm warning in 1997

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.