Alert archive / Louisiana / Tornado Warnings in 2001

Tornado Warning 161, NWS Jackson, MS

December 12, 2001Tensas Parish, Louisiana

NWS Jackson, MS issued this tornado warning at Dec 12, 2001, 3:30 PM CST for Tensas Parish, Louisiana. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Dec 12, 2001, 3:30 PM CST (21:30 UTC)
Expired: Dec 12, 2001, 4:15 PM CST
In force: 45 min
Issued by: NWS Jackson, MS
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Tensas Parish, LA

What was reported inside it

Time	Report	Where	Remark
Dec 12, 3:55 PM CST	Tornado F0	Newellton, LA	A brief tornado touchdown occurred over open country. No damage to structures was reported, but a few trees and powerlines were knocked down.

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 12, 11:00 AM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.5 hours before the alert went out and 120 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1218 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 286 m²/s²
0-3 km storm-relative helicity: 325 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.

676 
WFUS54 KJAN 122130
TORJAN
LAC107-122215-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
330 PM CST WED DEC 12 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR...
  TENSAS PARISH IN NORTHEAST LOUISIANA

* UNTIL 415 PM CST

* AT 330 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A TORNADO 10 MILES SOUTHWEST OF NEWELLTON...OR ABOUT 23 MILES      
  SOUTHEAST OF WINNSBORO...MOVING NORTHEAST AT 35 MPH.

* THE TORNADO IS EXPECTED TO...
  BE NEAR NEWELLTON AT 345 PM CST

A TORNADO MAY FORM AT ANY TIME - TAKE COVER NOW ABANDON MOBILE HOMES
AND VEHICLES FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS.

LAT...LON 3202 9150 3187 9139 3202 9115 3217 9118
          3224 9117

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 12, 12:57 PM CST	Flash Flood Warning	JAN	Morehouse	2 hr
Dec 12, 1:55 PM CST	Tornado Warning	JAN	Catahoula	50 min
Dec 12, 2:27 PM CST	Tornado Warning	JAN	Franklin, Tensas	63 min
Dec 12, 3:00 PM CST	Flash Flood Warning	JAN	Morehouse	2 hr
Dec 12, 3:20 PM CST	Tornado Warning	JAN	Madison	55 min
Dec 12, 4:15 PM CST	Tornado Warning	JAN	Madison	45 min

Nearby

Tornado Warnings in Louisiana, 2001 Every tornado warning in 2001 Tornadoes in 2001

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.