Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 1, NWS Green Bay, WI

April 5, 1997Portage County, Wood County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Apr 5, 1997, 6:10 PM CST for Portage County, Wood County, Wisconsin. It was in force for 50 min. 3 reports 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: Apr 5, 1997, 6:10 PM CST (00:10 UTC)
Expired: Apr 5, 1997, 7:00 PM CST
In force: 50 min
Issued by: NWS Green Bay, WI
Area: Whole counties

Counties Portage County, WI, Wood County, WI

The radar

The Green Bay radar (KGRB), 132 km from the middle of the area, began a volume at 00:13 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

Time	Report	Where
Apr 5, 6:20 PM CST	Thunderstorm Wind	Pittsville, WI
Apr 5, 6:50 PM CST	Thunderstorm Wind	Bancroft, WI
Apr 5, 6:55 PM CST	Thunderstorm Wind	Stevens Pt, 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, 0.2 hours before the alert went out and 133 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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 060011 RRA
SVRGRB
WIC097-141-060100-

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

* SEVERE THUNDERSTORM WARNING FOR
  PORTAGE COUNTY - CENTRAL WISCONSIN
  WOOD COUNTY - CENTRAL WISCONSIN

* UNTIL 700 PM CST
 
* SOME LOCATIONS AFFECTED
  NEKOOSA
  WISCONSIN RAPIDS
  JUNCTION CITY

* AT 605 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR NECEDAH. THE STORM WAS MOVING NORTH AT
  50 MPH.

* THE STORM WILL BE WILL BE NEAR NEKOOSA AT 625 PM...WISCONSIN
  RAPIDS AT 635 PM AND JUCTION CITY AT 645 PM.

THIS STORM CONTAINS WINDS TO 60 MPH. MOVE TO A STURDY SHELTER.

DI/AK

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 6:35 PM CST	Severe Thunderstorm Warning	GRB	Waushara	25 min
Apr 5, 6:51 PM CST	Severe Thunderstorm Warning	GRB	Marathon	64 min
Apr 5, 7:01 PM CST	Severe Thunderstorm Warning	GRB	Portage, Shawano, Waupaca	59 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1997 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.