Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 16, NWS Green Bay, WI

April 18, 2002Florence County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Apr 18, 2002, 7:17 PM CDT for Florence County, Wisconsin. It was in force for 28 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, 2002, 7:17 PM CDT (00:17 UTC)
Expired: Apr 18, 2002, 7:45 PM CDT
In force: 28 min
Issued by: NWS Green Bay, WI
Area: Counties, with a storm outline in the text

County Florence County, WI

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 00:00Z, 0.3 hours before the alert went out and 158 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: 188 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 2321 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 216 m²/s²
0-3 km storm-relative helicity: 288 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 190017
SVRGRB
WIC037-190045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
715 PM CDT THU APR 18 2002

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FLORENCE COUNTY IN WISCONSIN

* UNTIL 745 PM CDT

* AT 715 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  SEVERE THUNDERSTORM WITH HAIL UP TO 1 INCH IN DIAMETER. THE STORM
  WAS LOCATED 11 MILES SOUTHWEST OF COMMONWEALTH. THAT PLACES IT 13
  MILES WEST OF IRON MOUNTAIN MICHIGAN. IT WAS MOVING NORTHEAST AT 30
  MPH.

* SOME LOCATIONS THAT WILL BE AFFECTED BY THE STORM INCLUDE...
  SPREAD EAGLE BY 735 PM CDT.
  COMMONWEALTH BY 735 PM CDT.
  FLORENCE BY 735 PM CDT.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO WARNING.
IF A TORNADO IS SPOTTED...MOVE TO A BASEMENT OR SMALL INTERIOR ROOM
ON THE LOWEST FLOOR OF YOUR BUILDING.

THIS STORM WILL ALSO PRODUCE TORRENTIAL RAIN...WHICH MAY FLOOD LOW
LYING AREAS SUCH AS DITCHES AND UNDERPASSES. DO NOT DRIVE YOUR
VEHICLE ON A FLOODED ROADWAY.

LAT...LON 4583 8841 4573 8833 4597 8779 4615 8802

ECKBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 7:03 PM CDT	Flash Flood Warning	GRB	Florence, Forest, Oneida, Vilas	117 min
Apr 18, 7:26 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Oneida	49 min
Apr 18, 7:26 PM CDT	Tornado Warning	GRB	Marathon	34 min
Apr 18, 7:42 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Shawano	63 min
Apr 18, 7:50 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Menominee	55 min
Apr 18, 8:08 PM CDT	Severe Thunderstorm Warning	GRB	Outagamie, Shawano, Waupaca	52 min
Apr 18, 8:25 PM CDT	Special Marine Warning	GRB		110 min
Apr 18, 8:25 PM CDT	Special Marine Warning	GRB		110 min
Apr 18, 8:25 PM CDT	Special Marine Warning	GRB		110 min
Apr 18, 8:30 PM CDT	Flash Flood Warning	GRB	Marinette	30 min
Apr 18, 8:59 PM CDT	Severe Thunderstorm Warning	GRB	Calumet, Winnebago	46 min
Apr 18, 9:13 PM CDT	Severe Thunderstorm Warning	GRB	Manitowoc	32 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2002 Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive.