Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 114, NWS Twin Cities, MN

July 5, 1997Dunn County, Pepin County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 5, 1997, 7:20 PM CDT for Dunn County, Pepin County, Wisconsin. It was in force for 40 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, 7:20 PM CDT (00:20 UTC)
Expired
Jul 5, 1997, 8:00 PM CDT
In force
40 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Dunn County, WI, Pepin County, WI

The radar

The La Crosse radar (KARX), 119 km from the middle of the area, began a volume at 00:22 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, 0.3 hours before the alert went out and 125 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.

637 
WUUS1 KMSP 060022 RRA
SVRMSP
WIC033-091-060100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
720 PM CDT SAT JUL 5 1997

* SEVERE THUNDERSTORM WARNING FOR
  SOUTHERN DUNN COUNTY - WEST CENTRAL WISCONSIN
  NORTHERN PEPIN COUNTY - WEST CENTRAL WISCONSIN

* UNTIL 800 PM CDT
 
* SOME LOCATIONS AFFECTED
    DOWNSVILLE
    ROCK FALLS
    ARKANSAW
    DURAND

* AT 717 PM CDT DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL NEAR DOWNSVILLE...OR ABOUT 5 MILES SOUTH OF MENOMONIE.  THE
  STORM WAS MOVING SOUTHEAST AT 20 MPH.

THIS IS A DANGEROUS STORM...WITH LARGE HAIL AND DAMAGING WINDS.
STAY INDOORS AWAY FROM WINDOWS.


MILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 7:27 PM CDTTornado WarningMPXEau Claire33 min

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.