Alert archive / Wisconsin / Tornado Warnings in 2002

Tornado Warning 4, NWS Green Bay, WI

April 18, 2002Oneida County, Vilas County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Apr 18, 2002, 6:50 PM CDT for Oneida County, Vilas County, Wisconsin. It was in force for 40 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 18, 2002, 6:50 PM CDT (23:50 UTC)
Expired: Apr 18, 2002, 7:30 PM CDT
In force: 40 min
Issued by: NWS Green Bay, WI
Area: Counties, with a storm outline in the text

Counties Oneida County, WI, Vilas County, WI

What was reported inside it

Time	Report	Where	Remark
Apr 18, 6:55 PM CDT	Hail 1.75	Manitowish, 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 18, 5:00 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.8 hours before the alert went out and 210 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: 1774 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 460 m²/s²
0-3 km storm-relative helicity: 766 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KGRB 182350
TORGRB
WIC085-125-190030-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
649 PM CDT THU APR 18 2002

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN ONEIDA COUNTY IN WISCONSIN
  WESTERN VILAS COUNTY IN WISCONSIN

* UNTIL 730 PM CDT

* AT 649 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  LINE OF SEVERE THUNDERSTORMS FROM SOUTHEASTERN IRON COUNTY TO EAST
  CENTRAL PRICE COUNTY. SOME OF THE STORMS IN THE LINE COULD PRODUCE
  TORNADOES. THE LINE WAS MOVING EAST AT 30 MPH.

* SOME LOCATIONS THAT WILL BE AFFECTED BY THE STORMS INCLUDE...
  LAC DU FLAMBEAU BY 700 PM CDT.
  WILLOW RESERVOIR BY 710 PM CDT.

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

LAT...LON 4611 9009 4553 9025 4560 8955 4611 8942

BRUSKY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 7:17 AM CDT	Special Marine Warning	GRB		58 min
Apr 18, 7:17 AM CDT	Special Marine Warning	GRB		58 min
Apr 18, 1:30 PM CDT	Severe Thunderstorm Warning	GRB	Waupaca, Waushara	30 min
Apr 18, 1:33 PM CDT	Severe Thunderstorm Warning	GRB	Waupaca, Waushara	27 min
Apr 18, 2:22 PM CDT	Severe Thunderstorm Warning	GRB	Oconto	38 min
Apr 18, 3:53 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Oneida	37 min
Apr 18, 4:19 PM CDT	Severe Thunderstorm Warning	GRB	Vilas	41 min
Apr 18, 4:29 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Oneida	46 min
Apr 18, 4:34 PM CDT	Tornado Warning	GRB	Lincoln, Oneida	41 min
Apr 18, 4:57 PM CDT	Severe Thunderstorm Warning	GRB	Vilas	63 min
Apr 18, 5:07 PM CDT	Severe Thunderstorm Warning	GRB	Waushara, Winnebago	53 min
Apr 18, 5:15 PM CDT	Tornado Warning	GRB	Oneida	45 min
Apr 18, 5:16 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Oneida	59 min
Apr 18, 5:29 PM CDT	Flash Flood Warning	GRB	Oneida, Vilas	91 min
Apr 18, 5:33 PM CDT	Severe Thunderstorm Warning	GRB	Marathon	57 min
Apr 18, 5:53 PM CDT	Tornado Warning	GRB	Forest	37 min
Apr 18, 6:26 PM CDT	Severe Thunderstorm Warning	GRB	Florence, Forest	49 min
Apr 18, 6:30 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Wood	60 min
Apr 18, 6:50 PM CDT	Severe Thunderstorm Warning	GRB	Marinette	40 min

Nearby

Tornado Warnings in Wisconsin, 2002 Every tornado warning in 2002 Tornadoes in 2002

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.