Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 75, NWS Green Bay, WI

July 30, 2002Oconto County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 30, 2002, 8:11 PM CDT for Oconto County, Wisconsin. It was in force for 49 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: Jul 30, 2002, 8:11 PM CDT (01:11 UTC)
Expired: Jul 30, 2002, 9:00 PM CDT
In force: 49 min
Issued by: NWS Green Bay, WI
Area: Counties, with a storm outline in the text

County Oconto County, WI

The radar

The Green Bay radar (KGRB), 40 km from the middle of the area, began a volume at 01:13 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 30, 5:35 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.2 hours before the alert went out and 42 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: 3877 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 1398 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 164 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.0

Open this sounding in Storm Lab

The text

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

676 
WUUS53 KGRB 310111
SVRGRB
WIC083-310200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
811 PM CDT TUE JUL 30 2002

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN OCONTO COUNTY IN WISCONSIN

* UNTIL 900 PM CDT

* AT 811 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  SEVERE THUNDERSTORM WITH DAMAGING WINDS AND LARGE HAIL. THE STORM
  WAS LOCATED 6 MILES WEST OF STILES. THAT PLACES IT 21 MILES EAST OF
  SHAWANO. IT WAS MOVING EAST AT 25 MPH.

* SOME LOCATIONS THAT WILL BE AFFECTED BY THE STORM INCLUDE...
  STILES BY 820 PM CDT.
  ABRAMS BY 820 PM CDT.
  BROOKSIDE BY 830 PM CDT.
  PENSAUKEE BY 830 PM CDT.
  OCONTO BY 835 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.

SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MPH...OR HAIL AT
LEAST 3/4 INCH IN DIAMETER. IF YOU ARE IN THE WARNED AREA...MOVE
INDOORS AND STAY AWAY FROM WINDOWS.

LAT...LON 4495 8817 4477 8822 4468 8786 4494 8773

BRUSKY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 7:12 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Wood	63 min
Jul 30, 7:16 PM CDT	Severe Thunderstorm Warning	GRB	Langlade	59 min
Jul 30, 7:28 PM CDT	Tornado Warning	GRB	Langlade, Lincoln	32 min
Jul 30, 7:44 PM CDT	Tornado Warning	GRB	Shawano	46 min
Jul 30, 7:55 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln	35 min
Jul 30, 8:03 PM CDT	Severe Thunderstorm Warning	GRB	Menominee	42 min
Jul 30, 8:15 PM CDT	Special Marine Warning	GRB		2 hr
Jul 30, 8:15 PM CDT	Special Marine Warning	GRB		2 hr
Jul 30, 8:15 PM CDT	Special Marine Warning	GRB		2 hr
Jul 30, 8:26 PM CDT	Severe Thunderstorm Warning	GRB	Shawano	49 min
Jul 30, 8:29 PM CDT	Severe Thunderstorm Warning	GRB	Waushara	46 min
Jul 30, 8:46 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Vilas	44 min
Jul 30, 8:51 PM CDT	Severe Thunderstorm Warning	GRB	Winnebago	39 min
Jul 30, 8:56 PM CDT	Severe Thunderstorm Warning	GRB	Outagamie	34 min
Jul 30, 9:17 PM CDT	Severe Thunderstorm Warning	GRB	Calumet	43 min
Jul 30, 9:25 PM CDT	Special Marine Warning	GRB		95 min
Jul 30, 9:25 PM CDT	Special Marine Warning	GRB		95 min
Jul 30, 9:29 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Manitowoc	46 min
Jul 30, 9:43 PM CDT	Severe Thunderstorm Warning	GRB	Door	32 min
Jul 31, 1:02 PM CDT	Severe Thunderstorm Warning	GRB	Oneida, Vilas	58 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; radar from the NEXRAD Level II archive.