Alert archive / Louisiana / Tornado Warnings in 2001

Tornado Warning 12, NWS Shreveport, LA

November 26, 2001Union Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Nov 26, 2001, 4:23 PM CST for Union Parish, Louisiana. It was in force for 67 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Nov 26, 2001, 4:23 PM CST (22:23 UTC)
Expired: Nov 26, 2001, 5:30 PM CST
In force: 67 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County Union Parish, LA

The radar

The Shreveport radar (KSHV), 144 km from the middle of the area, began a volume at 22:23 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
Nov 26, 4:48 PM CST	Tornado F1	Downsville, LA	This weak tornado was spawned from the supercell that produced a weak tornado over Lincoln Parish, LA. Damage was mostly confined to small trees and limbs and several power lines.

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
Nov 26, 1:00 PM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 10.4 hours before the alert went out and 135 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: 31 J/kg
Mixed-layer CIN: -250 J/kg
Mixed-layer LCL: 732 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 288 m²/s²
0-3 km storm-relative helicity: 297 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

384 
WFUS54 KSHV 262225
TORSHV
LAC111-262330-
/NEW.KSHV.TO.W.0009.262223-262330/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
423 PM CST MON NOV 26 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR...
  UNION PARISH IN NORTH CENTRAL LOUISIANA

* UNTIL 530 PM CST

* AT 423 PM CST...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED A TORNADO 14 MILES SOUTH OF MARION...OR ABOUT 13
  MILES NORTHWEST OF CLAIBORNE...MOVING NORTHEAST AT 30 MPH.

DURING A TORNADO...SEEK SHELTER IN AN INTERIOR HALLWAY OR ROOM...ON
THE LOWEST FLOOR OF YOUR HOME...OR BUSINESS. STAY AWAY FROM WINDOWS.

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
FOR...
  UNION PARISH IN NORTH CENTRAL LOUISIANA
UNTIL 530 PM CST.

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 26, 2:26 PM CST	Severe Thunderstorm Warning	SHV	De Soto	49 min
Nov 26, 2:35 PM CST	Tornado Warning	SHV	De Soto	40 min
Nov 26, 2:51 PM CST	Severe Thunderstorm Warning	SHV	Sabine	39 min
Nov 26, 3:24 PM CST	Tornado Warning	SHV	Sabine	36 min
Nov 26, 4:26 PM CST	Tornado Warning	SHV	Bienville	64 min
Nov 26, 4:43 PM CST	Tornado Warning	SHV	Lincoln	62 min
Nov 26, 4:43 PM CST	Tornado Warning	SHV	Webster	32 min
Nov 26, 5:05 PM CST	Tornado Warning	SHV	Claiborne	55 min
Nov 26, 5:27 PM CST	Severe Thunderstorm Warning	SHV	Jackson	63 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; radar from the NEXRAD Level II archive.