Alert archive / Texas / Tornado Warnings in 2002

Tornado Warning 34, NWS Shreveport, LA

December 30, 2002Cass County, Texas

NWS Shreveport, LA issued this tornado warning at Dec 30, 2002, 5:30 PM CST for Cass County, Texas. It was in force for 45 min. 2 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: Dec 30, 2002, 5:30 PM CST (23:30 UTC)
Expired: Dec 30, 2002, 6:15 PM CST
In force: 45 min
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

County Cass County, TX

What was reported inside it

Time	Report	Where	Remark
Dec 30, 5:35 PM CST	Thunderstorm Wind 65 M	Douglassville, TX	Numerous trees toppled.
Dec 30, 5:57 PM CST	Hail 1.75	Linden, TX

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 nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 11.5 hours before the alert went out and 100 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: 1 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 579 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 372 m²/s²
0-3 km storm-relative helicity: 378 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.

690 
WFUS54 KSHV 302330
TORSHV
TXC067-310015-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
529 PM CST MON DEC 30 2002

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  CASS COUNTY IN NORTHEAST TEXAS

* UNTIL 615 PM CST

* AT 529 PM CST...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER   
RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 15 
MILES NORTHWEST OF LINDEN...OR NEAR MARIETTA...MOVING NORTHEAST AT 
30 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  DOUGLASSVILLE AT 540 PM CST

IN ADDITION TO THE THREAT OF A TORNADO...LARGE HAIL AND DAMAGING WIND
CAN BE EXPECTED. GO TO A SAFE PLACE.

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
FOR...
  CASS COUNTY IN NORTHEAST TEXAS
UNTIL 615 PM CST.

LAT...LON 3324 9464 3301 9464 3299 9423 3325 9422

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 30, 4:11 PM CST	Severe Thunderstorm Warning	SHV	Red River	34 min
Dec 30, 4:48 PM CST	Severe Thunderstorm Warning	SHV	Cass, Morris	57 min
Dec 30, 5:00 PM CST	Tornado Warning	SHV	Cass, Morris	30 min
Dec 30, 5:11 PM CST	Severe Thunderstorm Warning	SHV	Smith	64 min
Dec 30, 5:42 PM CST	Tornado Warning	SHV	Bowie	63 min
Dec 30, 5:58 PM CST	Severe Thunderstorm Warning	SHV	Rusk	62 min

Nearby

Tornado Warnings in Texas, 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.