Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 90, NWS Green Bay, WI

September 21, 1996Oconto County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Sep 21, 1996, 7:25 PM CDT for Oconto County, Wisconsin. It was in force for 35 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Sep 21, 1996, 7:25 PM CDT (00:25 UTC)
Expired
Sep 21, 1996, 8:00 PM CDT
In force
35 min
Issued by
NWS Green Bay, WI
Area
Whole counties

County Oconto County, WI

The radar

The Green Bay radar (KGRB), 56 km from the middle of the area, began a volume at 00:28 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.

What was reported inside it

TimeReportWhereRemark
Sep 21, 7:30 PM CDTHail 0.88Gillett, WI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.4 hours before the alert went out and 58 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 1996-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 813 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, Green Bay/Straub, WI at 00:00Z on 1996-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 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
813 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
877 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
37 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 220027
SVRGRB
WIC083-220100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
725 PM CDT SAT SEP 21 1996

THE NATIONAL WEATHER SERVICE IN GREEN BAY WI HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 800 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHEAST WISCONSIN

   ...SOUTHERN OCONTO COUNTY
 
A LINE OF SEVERE THUNDERSTORMS WAS LOCATED FROM NEAR GILLETT TO NEAR
OCONTO FALLS TO NEAR SAMPSON.

THIS LINE OF STORMS WAS MOVING TO THE NORTHEAST AT 15 TO 20 MPH AND WILL
AFFECT THE TOWNS OF OCONTO FALLS...STILES AND ABRAMS THROUGH 8 PM.

LARGE HAIL WAS INDICATED BY DOPPLER RADAR WITH THESE STORMS.

IF SEVERE WEATHER MOVES INTO YOUR AREA...SEEK INDOOR SHELTER AND
STAY AWAY FROM WINDOWS.

ISAACSON

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 21, 8:24 PM CDTSevere Thunderstorm WarningGRBBrown, Oconto21 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1996Every severe thunderstorm warning in 1996

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.