Alert archive / Louisiana / Tornado Warnings in 2007

Tornado Warning 5, NWS Shreveport, LA

February 24, 2007Claiborne Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Feb 24, 2007, 1:10 PM CST for Claiborne Parish, Louisiana. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Feb 24, 2007, 1:10 PM CST (19:10 UTC)
Expired: Feb 24, 2007, 2:00 PM CST
In force: 50 min
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

County Claiborne Parish, LA

The radar

The Shreveport radar (KSHV), 96 km from the middle of the area, began a volume at 19:10 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 24, 8:47 AM CST	Tornado Watch PDS	SPC	9 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 7.2 hours before the alert went out and 87 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: 144 J/kg
Mixed-layer CIN: -313 J/kg
Mixed-layer LCL: 511 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 513 m²/s²
0-3 km storm-relative helicity: 661 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.2

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KSHV 241912
TORSHV
LAC027-242000-
/O.NEW.KSHV.TO.W.0005.070224T1910Z-070224T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
110 PM CST SAT FEB 24 2007

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  CLAIBORNE PARISH IN NORTHWEST LOUISIANA

* UNTIL 200 PM CST

* AT 110 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 5 MILES         
  EAST OF HOMER...MOVING NORTHEAST AT 45 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  JUNCTION CITY BY 135 PM CST

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
FOR...
  CLAIBORNE PARISH IN NORTHWEST LOUISIANA
UNTIL 200 PM CST.

LAT...LON 3281 9316 3268 9301 3292 9272 3302 9273
      3301 9293

$$

15

2 follow-up statements

000 
WWUS54 KSHV 241933
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
132 PM CST SAT FEB 24 2007

LAC027-242000-
/O.CON.KSHV.TO.W.0005.000000T0000Z-070224T2000Z/
CLAIBORNE LA-
132 PM CST SAT FEB 24 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 200 PM CST FOR CLAIBORNE
PARISH...

AT 132 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED JUST SOUTH OF JUNCTION 
CITY IN EXTREME NORTHEAST CLAIBORNE PARISH...MOVING NORTHEAST AT 55 MPH.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A 
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE 
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CST SATURDAY AFTERNOON
FOR NORTHERN LOUISIANA AND SOUTHWESTERN ARKANSAS.

LAT...LON 3281 9316 3268 9301 3292 9272 3302 9273
      3301 9293

$$

15

000 
WWUS54 KSHV 241957
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
156 PM CST SAT FEB 24 2007

LAC027-242006-
/O.EXP.KSHV.TO.W.0005.000000T0000Z-070224T2000Z/
CLAIBORNE LA-
156 PM CST SAT FEB 24 2007

...THE TORNADO WARNING FOR CLAIBORNE PARISH EXPIRES AT 200 PM CST...

THE STORM THAT PROMPTED THE TORNADO WARNING HAS MOVED NORTHEAST INTO 
EASTERN UNION COUNTY ARKANSAS. TREES HAVE BEEN REPORTED DOWNED FROM 
THIS STORM NEAR SUMMERFIELD. 

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CST SATURDAY AFTERNOON
FOR NORTHERN LOUISIANA AND SOUTHWESTERN ARKANSAS.

LAT...LON 3281 9316 3268 9301 3292 9272 3302 9273
      3301 9293

$$

15

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 24, 9:59 AM CST	Severe Thunderstorm Warning	SHV	Caddo	61 min
Feb 24, 12:22 PM CST	Tornado Warning	SHV	Caddo, De Soto	20 min
Feb 24, 1:28 PM CST	Tornado Warning	SHV	Union	53 min
Feb 24, 2:24 PM CST	Tornado Warning	SHV	De Soto	36 min
Feb 24, 2:41 PM CST	Severe Thunderstorm Warning	SHV	Claiborne	49 min
Feb 24, 2:58 PM CST	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Red River, Webster	32 min
Feb 24, 3:00 PM CST	Tornado Warning	SHV	Claiborne	30 min
Feb 24, 3:11 PM CST	Tornado Warning	SHV	Union	49 min
Feb 24, 3:36 PM CST	Severe Thunderstorm Warning	SHV	Bienville	24 min
Feb 24, 4:19 PM CST	Severe Thunderstorm Warning	SHV	Union	56 min
Feb 24, 5:09 PM CST	Severe Thunderstorm Warning	SHV	Ouachita	51 min
Feb 24, 5:15 PM CST	Severe Thunderstorm Warning	SHV	Jackson	30 min

Nearby

Tornado Warnings in Louisiana, 2007 Every tornado warning in 2007 Tornadoes in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.