Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 13, NWS Green Bay, WI

June 20, 1997Portage County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jun 20, 1997, 1:52 AM CDT for Portage County, Wisconsin. It was in force for 28 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
Jun 20, 1997, 1:52 AM CDT (06:52 UTC)
Expired
Jun 20, 1997, 2:20 AM CDT
In force
28 min
Issued by
NWS Green Bay, WI
Area
Whole counties

County Portage County, WI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 6.9 hours before the alert went out and 111 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, Green Bay/Straub, WI at 00:00Z on 1997-06-20Temperature 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, Green Bay/Straub, WI at 00:00Z on 1997-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 151 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
596 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
151 m²/s²
0-3 km storm-relative helicity
356 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.

000 
TTAA00 KGRB 200655 RRA
SVRGRB
WIC097-200720-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
152 AM CDT FRI JUN 20 1997

* SEVERE THUNDERSTORM WARNING FOR
  PORTAGE COUNTY - CENTRAL WISCONSIN

* UNTIL 220 AM CDT
 
* SOME LOCATIONS AFFECTED
  STEVENS POINT
  CUSTER
  NELSONVILLE

* AT 1:50 AM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 10 MILES WEST OF STEVENS POINT. THE STORM WAS
  MOVING EAST AT 35 MPH.

* THE STORM WILL BE OVER STEVENS POINT BY 2:00 AM AND AMHERST
  JUNCTION BY 2:10 AM..

THIS IS A DANGEROUS STORM WITH HAIL LARGER THAN AN INCH IN
DIAMETER. MOVE TO A STURDY SHELTER.

RF/DI

The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 19, 11:15 PM CDTSevere Thunderstorm WarningGRBMarathon60 min
Jun 20, 1:28 AM CDTSevere Thunderstorm WarningGRBWood57 min
Jun 20, 2:17 AM CDTSevere Thunderstorm WarningGRBOutagamie58 min
Jun 20, 3:01 AM CDTSevere Thunderstorm WarningGRBBrown59 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.