Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 3, NWS Green Bay, WI

April 5, 1997Marathon County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Apr 5, 1997, 6:51 PM CST for Marathon County, Wisconsin. It was in force for 64 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
Apr 5, 1997, 6:51 PM CST (00:51 UTC)
Expired
Apr 5, 1997, 7:55 PM CST
In force
64 min
Issued by
NWS Green Bay, WI
Area
Whole counties

County Marathon County, WI

The radar

The Green Bay radar (KGRB), 138 km from the middle of the area, began a volume at 00:54 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.9 hours before the alert went out and 139 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 1997-04-06Temperature 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 1997-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
492 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
-7 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 060052 RRA
SVRGRB
WIC073-060155-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
651 PM CST SAT APR 5 1997

* SEVERE THUNDERSTORM WARNING FOR
  MARATHON COUNTY - CENTRAL WISCONSIN

* UNTIL 755 PM CST
 
* SOME LOCATIONS AFFECTED
  SPENCER
  ABBOTSFORD
  MOSINEE

* AT 648 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE
  OF SEVERE THUNDERSTORMS FROM FROM CENTRAL CLARK COUNTY TO
  SOUTHEAST CLARK COUNTY TO NEAR PLAINFIELD IN WAUSHARA
  COUNTY. THE STORMS WERE MOVING NORTHEAST AT 50 MPH.

* THE STORMS WILL BE NEAR SPENCER BY 7 PM...ABBOTSFORD AND MOSINEE
  BY 715 PM.

THESE STORMS CONTAIN WINDS TO 60 MPH. MOVE TO A STURDY SHELTER.
v
DI/AK

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 5, 6:10 PM CSTSevere Thunderstorm WarningGRBPortage, Wood50 min
Apr 5, 6:35 PM CSTSevere Thunderstorm WarningGRBWaushara25 min
Apr 5, 7:01 PM CSTSevere Thunderstorm WarningGRBPortage, Shawano, Waupaca59 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.