Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 67, NWS Green Bay, WI

July 28, 2002Lincoln County, Marathon County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 28, 2002, 9:34 PM CDT for Lincoln County, Marathon County, Wisconsin. It was in force for 56 min. 8 reports 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: Jul 28, 2002, 9:34 PM CDT (02:34 UTC)
Expired: Jul 28, 2002, 10:30 PM CDT
In force: 56 min
Issued by: NWS Green Bay, WI
Area: Counties, with a storm outline in the text

Counties Lincoln County, WI, Marathon County, WI

The radar

The La Crosse radar (KARX), 166 km from the middle of the area, began a volume at 02:37 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.

What was reported inside it

Time	Report	Where
Jul 28, 9:39 PM CDT	Thunderstorm Wind 52 E	Abbotsford, WI
Jul 28, 10:10 PM CDT	Thunderstorm Wind 50 E	Rib Falls, WI
Jul 28, 10:12 PM CDT	Thunderstorm Wind 52 E	Edgar, WI
Jul 28, 10:19 PM CDT	Thunderstorm Wind 52 E	Athens, WI
Jul 28, 10:22 PM CDT	Thunderstorm Wind 50 E	Marathon, WI
Jul 28, 10:24 PM CDT	Thunderstorm Wind 52 E	Merrill, WI
Jul 28, 10:29 PM CDT	Thunderstorm Wind 50 E	Wausau, WI
Jul 28, 10:40 PM CDT	Thunderstorm Wind 50 E	Rib Falls, 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
Jul 28, 8:05 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.6 hours before the alert went out and 169 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: 1469 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1670 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

096 
WUUS53 KGRB 290234
SVRGRB
WIC069-073-290330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
934 PM CDT SUN JUL 28 2002

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MARATHON COUNTY IN WISCONSIN
  LINCOLN COUNTY IN WISCONSIN

* UNTIL 1030 PM CDT

* AT 934 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  LINE OF SEVERE THUNDERSTORMS WITH 60 MPH WINDS. THE LINE WAS
  LOCATED FROM 27 MILES WEST OF MERRILL TO 44 MILES SOUTHWEST OF
  WAUSAU. THE LINE WAS MOVING EAST AT 35 MPH.

* SOME LOCATIONS THAT WILL BE AFFECTED BY THE STORMS INCLUDE...
  COLBY BY 935 PM CDT.
  SPENCER BY 940 PM CDT.
  MILAN BY 940 PM CDT.
  ATHENS BY 945 PM CDT.

THE EXPECTED WINDS MAY BE STRONG ENOUGH TO DAMAGE WEAK STRUCTURES AND
TREES. IF YOU ARE IN THE WARNED AREA...TAKE COVER IN A STURDY
BUILDING.

CAMPERS AND OTHERS SHOULD SEEK SHELTER IN A STURDY BUILDING
IMMEDIATELY.

LAT...LON 4530 9030 4468 9062 4471 8967 4543 8944

KIECKBUSCH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 10:04 PM CDT	Tornado Warning	GRB	Marathon	26 min
Jul 28, 10:30 PM CDT	Tornado Warning	GRB	Marathon	45 min
Jul 28, 11:10 PM CDT	Severe Thunderstorm Warning	GRB	Menominee, Shawano	65 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.