Alert archive / Wisconsin / Tornado Warnings in 2004

Tornado Warning 1, NWS Green Bay, WI

April 18, 2004Vilas County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Apr 18, 2004, 8:15 PM CDT for Vilas County, Wisconsin. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 18, 2004, 8:15 PM CDT (01:15 UTC)
Expired
Apr 18, 2004, 8:45 PM CDT
In force
30 min
Issued by
NWS Green Bay, WI
Area
Counties, with a storm outline in the text

County Vilas County, WI

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 18, 6:35 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.3 hours before the alert went out and 223 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 2004-04-19Temperature 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 2004-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 353 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
1620 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
353 m²/s²
0-3 km storm-relative helicity
458 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

127 
WFUS53 KGRB 190115
TORGRB
WIC125-190145-


BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
815 PM CDT SUN APR 18 2004

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* TORNADO WARNING FOR...
  VILAS COUNTY IN WISCONSIN

* UNTIL 845 PM CDT

* AT 815 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR AND SPOTTER 
  REPORTS INDICATED A SEVERE THUNDERSTORM WITH A POSSIBLE TORNADO.   
  THE MOST DANGEROUS PART OF THE STORM WAS LOCATED NEAR BOULDER      
  JUNCTION. THAT PLACES THE STORM 23 MILES NORTHWEST                 
  OF EAGLE RIVER. IT WAS MOVING EAST AT 40 MPH.

* THE TORNADO WILL BE NEAR...
  LAND O LAKES AROUND 835 PM...

THE STORM WILL ALSO PRODUCE WIDESPREAD DAMAGING WINDS AND LARGE
DESTRUCTIVE HAIL.

MOVE TO A BASEMENT OR SMALL INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
BUILDING.

LAT...LON 4625 9002 4595 8982 4611 8880 4649 8905

$$

KURIMSKI

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 18, 7:20 PM CDTSevere Thunderstorm WarningGRBVilas55 min

Nearby

Tornado Warnings in Wisconsin, 2004Every tornado warning in 2004Tornadoes in 2004

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.