Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 138, NWS Twin Cities, MN

July 16, 1997Pierce County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 16, 1997, 11:33 PM CDT for Pierce County, Wisconsin. It was in force for 57 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 16, 1997, 11:33 PM CDT (04:33 UTC)
Expired
Jul 17, 1997, 12:30 AM CDT
In force
57 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Pierce County, WI

The radar

The Minneapolis radar (KMPX), 91 km from the middle of the area, began a volume at 04:36 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, 4.6 hours before the alert went out and 94 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 1997-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2132 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 1997-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.193958Sfc1 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
2132 J/kg
Mixed-layer CIN
-110 J/kg
Mixed-layer LCL
1981 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

136 
WUUS1 KMSP 170436 RRA
SVRMSP
WIC093-170530-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1133 PM CDT WED JUL 16 1997

* SEVERE THUNDERSTORM WARNING FOR
  PIERCE COUNTY - WEST CENTRAL WISCONSIN

* UNTIL 1230 AM CDT
 
* SOME LOCATIONS AFFECTED
    BAY CITY
    HAGER CITY
    MAIDEN ROCK
    DIAMOND BLUFF

* AT 1133 PM CDT DOPPLER RADAR INDICATED SEVERE STORMS 3 MILES
  NORTHEAST OF RED WING...NEAR HAGER CITY.  THE STORM WAS MOVING
  SLOWLY EAST AT 10 MPH.

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


TDK

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 12:23 AM CDTSevere Thunderstorm WarningMPXPepin, Pierce67 min
Jul 17, 2:55 AM CDTSevere Thunderstorm WarningMPXPierce65 min
Jul 17, 2:55 AM CDTSevere Thunderstorm WarningMPXSaint Croix65 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.