Alert archive / Wisconsin / Tornado Warnings in 1997

Tornado Warning 34, NWS Twin Cities, MN

August 14, 1997Pepin County, Pierce County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at Aug 14, 1997, 7:08 PM CDT for Pepin County, Pierce County, Wisconsin. 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
Aug 14, 1997, 7:08 PM CDT (00:08 UTC)
Expired
Aug 14, 1997, 7:45 PM CDT
In force
37 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Pepin County, WI, Pierce County, WI

The radar

The Minneapolis radar (KMPX), 105 km from the middle of the area, began a volume at 00:10 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, 0.1 hours before the alert went out and 107 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 1997-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1906 joules per kilogram.LCLEL10008507005003002001001 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 1997-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 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
1906 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1122 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
204 m²/s²
Significant tornado parameter
0.9
Supercell composite
5.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 150010 RRA
TORMSP
WIC091-093-150045-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
708 PM CDT THU AUG 14 1997


* TORNADO WARNING FOR
  PEPIN COUNTY - WEST CENTRAL WISCONSIN
  SOUTHERN PIERCE COUNTY - WEST CENTRAL WISCONSIN

* UNTIL 745 PM CDT

* SOME LOCATIONS AFFECTED
    BAY CITY
    STOCKHOLM
    MAIDEN ROCK
    PLUM CITY

* AT 705 PM CDT SEVERE WEATHER SPOTTERS REPORTED A TORNADO 10
  SOUTH OF $RED WING.  THE STORM WAS MOVING NORTHEAST AT 30 MPH.

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

JMP


&

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 15, 6:55 PM CDTSevere Thunderstorm WarningMPXPolk65 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.