Alert archive / Wisconsin / Tornado Warnings in 1997

Tornado Warning 21, NWS Twin Cities, MN

July 5, 1997Eau Claire County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at Jul 5, 1997, 7:27 PM 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
Jul 5, 1997, 7:27 PM CDT (00:27 UTC)
Expired
Jul 5, 1997, 8:00 PM 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 00:27 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, 0.5 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 00:00Z on 1997-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 218 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 1997-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.19395878Sfc1 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
218 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
1350 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
30 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 060028 RRA
TORMSP
WIC035-060100-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
727 PM CDT SAT JUL 5 1997

* TORNADO WARNING FOR
  SOUTHERN EAU CLAIRE COUNTY - WEST CENTRAL WISCONSIN

* UNTIL 800 PM CDT
 
* SOME LOCATIONS AFFECTED
    CLEGHORN
    BRACKETT
    FOSTER
    AUGUSTA

* AT 725 PM CDT SEVERE WEATHER SPOTTERS REPORTED NUMEROUS FUNNEL
  CLOUDS ON THE SOUTH SIDE OF EAU CLAIRE...NEAR INTERSTATE *94 AND
  HIGHWAY 93. A POSSIBLE TORNADO TOUCHDOWN WAS ALSO REPORTED AT
  THAT SAME LOCATION. THE STORM WAS MOVING SOUTHEAST AT 20 MPH.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR!

MILLER
 

&

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 5, 7:20 PM CDTSevere Thunderstorm WarningMPXDunn, Pepin40 min

Nearby

Tornado Warnings in Wisconsin, 1997Every tornado warning in 1997Tornadoes 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.