Alert archive / Louisiana / Tornado Warnings in 2002

Tornado Warning 17, NWS Shreveport, LA

December 18, 2002Bossier Parish, Caddo Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Dec 18, 2002, 4:55 PM CST for Bossier Parish, Caddo Parish, Louisiana. It was in force for 50 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: Dec 18, 2002, 4:55 PM CST (22:55 UTC)
Expired: Dec 18, 2002, 5:45 PM CST
In force: 50 min
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

Counties Bossier Parish, LA, Caddo Parish, LA

The radar

The Shreveport radar (KSHV), 46 km from the middle of the area, began a volume at 22:57 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	Remark
Dec 18, 5:15 PM CST	Hail 1	Plain Dealing, LA

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
Dec 18, 1:10 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 10.9 hours before the alert went out and 43 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: 193 J/kg
Mixed-layer CIN: -333 J/kg
Mixed-layer LCL: 639 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 345 m²/s²
0-3 km storm-relative helicity: 511 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.

763 
WFUS54 KSHV 182255
TORSHV
LAC015-017-182345-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
453 PM CST WED DEC 18 2002

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  BOSSIER PARISH IN NORTHWEST LOUISIANA
  CADDO PARISH IN NORTHWEST LOUISIANA

* UNTIL 545 PM CST

* AT 453 PM CST...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED A TORNADO 11 MILES SOUTHWEST OF PLAIN DEALING...OR
  ABOUT 10 MILES SOUTHEAST OF VIVIAN...MOVING NORTHEAST AT 45 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  OVER PLAIN DEALING AT 505 PM CST

IF YOU ARE IN A MOBILE HOME...ABANDON IT FOR A STURDY BUILDING...OR
GET IN A DITCH OR CULVERT.

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
FOR...
  BOSSIER PARISH IN NORTHWEST LOUISIANA
  CADDO PARISH IN NORTHWEST LOUISIANA
UNTIL 545 PM CST.

LAT...LON 3279 9403 3266 9387 3290 9347 3301 9355
          3302 9374

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 18, 4:10 PM CST	Tornado Warning	SHV	Lincoln	35 min
Dec 18, 4:46 PM CST	Tornado Warning	SHV	Union	29 min
Dec 18, 5:26 PM CST	Tornado Warning	SHV	Webster	19 min

Nearby

Tornado Warnings in Louisiana, 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; radar from the NEXRAD Level II archive.