Alert archive / Louisiana / Tornado Warnings in 2001

Tornado Warning 20, NWS Shreveport, LA

December 13, 2001Grant Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Dec 13, 2001, 3:07 PM CST for Grant Parish, Louisiana. It was in force for 53 min. 3 reports 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: Dec 13, 2001, 3:07 PM CST (21:07 UTC)
Expired: Dec 13, 2001, 4:00 PM CST
In force: 53 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County Grant Parish, LA

What was reported inside it

Time	Report	Where	Remark
Dec 13, 3:10 PM CST	Hail 0.75	Colfax, LA
Dec 13, 3:20 PM CST	Hail 0.75	Dry Prong, LA
Dec 13, 3:20 PM CST	Thunderstorm Wind 60 E	Montgomery, LA	Several large trees 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 nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 9.1 hours before the alert went out and 149 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: 1205 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 270 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

813 
WFUS54 KSHV 132108
TORSHV
LAC043-132200-
/NEW.KSHV.TO.W.0022.132107-132200/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
307 PM CST THU DEC 13 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 400 PM CST

* AT 307 PM CST...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED A TORNADO 13 MILES SOUTHWEST OF DRY PRONG...OR
  ABOUT 14 MILES NORTHWEST OF ALEXANDRIA...MOVING NORTHEAST AT 20
  MPH.

* THE TORNADO IS EXPECTED TO BE...
  3 MILES SOUTHEAST OF DRY PRONG AT 335 PM CST
  5 MILES NORTHWEST OF POLLOCK AT 345 PM CST
  8 MILES SOUTH OF GEORGETOWN AT 400 PM CST

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...
  GRANT PARISH IN NORTH CENTRAL LOUISIANA
UNTIL 400 PM CST.

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 13, 11:45 AM CST	Flash Flood Warning	SHV	Natchitoches, Sabine	4 hr
Dec 13, 12:00 PM CST	Severe Thunderstorm Warning	SHV	Ouachita	30 min
Dec 13, 12:51 PM CST	Flash Flood Warning	SHV	Grant, Winn	4 hr
Dec 13, 2:28 PM CST	Tornado Warning	SHV	Natchitoches	32 min
Dec 13, 3:30 PM CST	Severe Thunderstorm Warning	SHV	LaSalle	60 min
Dec 13, 3:44 PM CST	Flash Flood Warning	SHV	Natchitoches	3 hr

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.