Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 2, NWS Green Bay, WI

April 12, 2001Portage County, Wood County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Apr 12, 2001, 3:08 AM CDT for Portage County, Wood County, Wisconsin. It was in force for 52 min. 2 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 12, 2001, 3:08 AM CDT (08:08 UTC)
Expired
Apr 12, 2001, 4:00 AM CDT
In force
52 min
Issued by
NWS Green Bay, WI
Area
Whole counties

Counties Portage County, WI, Wood County, WI

What was reported inside it

TimeReportWhereRemark
Apr 12, 3:16 AM CDTThunderstorm Wind 53 MWisc Rpds South Co A, WI
Apr 12, 3:45 AM CDTThunderstorm Wind 50 EStevens 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, 8.1 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-pSkew-T log-p diagram, Green Bay/Straub, WI at 00:00Z on 2001-04-12Temperature 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 2001-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
737 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
33 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 
WUUS53 KGRB 120809
SVRGRB
WIC097-137-141-120900-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
308 AM CDT THU APR 12 2001

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PORTAGE COUNTY IN WISCONSIN
  WAUSHARA COUNTY IN WISCONSIN
  WOOD COUNTY IN WISCONSIN

* UNTIL 400 AM CDT

* AT 308 AM CDT...WEATHER SPOTTERS REPORTED A LINE OF SEVERE
  THUNDERSTORMS WITH 60 MPH WINDS. THE LINE EXTENDED FROM 15 MILES   
  WEST OF WISCONSIN RAPIDS TO 19 MILES SOUTH OF WAUTOMA AND IT WAS   
  MOVING NORTHEAST AT 40 MPH.

* SOME LOCATIONS THAT WILL BE AFFECTED BY THE STORMS INCLUDE...
  COLOMA BY 310 AM CDT.
  NEKOOSA BY 310 AM CDT.
  PORT EDWARDS BY 310 AM CDT.
  RICHFORD BY 310 AM CDT.

THESE STORMS COULD DAMAGE WEAK STRUCTURES AND TREES. IF YOU ARE IN
THE PATH OF THESE STORMS...TAKE COVER IN A STURDY BUILDING UNTIL THE
STORMS HAVE PASSED.

PLH

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 12, 3:08 AM CDTSevere Thunderstorm WarningGRBWaushara52 min
Apr 12, 3:57 AM CDTSevere Thunderstorm WarningGRBOutagamie, Waupaca, Winnebago48 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2001Every severe thunderstorm warning in 2001

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.