Alert archive / Louisiana / Tornado Warnings in 2003

Tornado Warning 26, NWS Shreveport, LA

May 13, 2003Caddo Parish, Louisiana; Marion County, Texas

NWS Shreveport, LA issued this tornado warning at May 13, 2003, 10:05 PM CDT for Caddo Parish, Louisiana; Marion County, Texas. It was in force for 40 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: May 13, 2003, 10:05 PM CDT (03:05 UTC)
Expired: May 13, 2003, 10:45 PM CDT
In force: 40 min
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

Counties Caddo Parish, LA, Marion County, TX

The radar

The Shreveport radar (KSHV), 38 km from the middle of the area, began a volume at 03:04 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
May 13, 8:30 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 3.1 hours before the alert went out and 39 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: 2326 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 1006 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 401 m²/s²
Significant tornado parameter: 3.2
Supercell composite: 18.5

Open this sounding in Storm Lab

The text

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

091 
WFUS54 KSHV 140305
TORSHV
LAC017-TXC315-140345-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1004 PM CDT TUE MAY 13 2003

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  MARION COUNTY IN NORTHEAST TEXAS
  CADDO PARISH IN NORTHWEST LOUISIANA

* UNTIL 1045 PM CDT

* AT 1004 PM CDT...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED A TORNADO 5 MILES WEST OF OIL CITY...OR ABOUT 9    
  MILES SOUTHWEST OF VIVIAN...MOVING EAST SOUTHEAST AT 25 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  OVER OIL CITY AT 1015 PM CDT

IN ADDITION TO THE THREAT OF A TORNADO...LARGE HAIL AND DAMAGING WIND
CAN BE EXPECTED. GO TO A SAFE PLACE...NOW

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
FOR...
  MARION COUNTY IN NORTHEAST TEXAS
  CADDO PARISH IN NORTHWEST LOUISIANA
UNTIL 1045 PM CDT.

LAT...LON 3286 9411 3273 9417 3256 9380 3280 9384

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 9:34 PM CDT	Tornado Warning	SHV	Webster	26 min
May 13, 9:44 PM CDT	Tornado Warning	SHV	Claiborne	61 min
May 13, 9:48 PM CDT	Severe Thunderstorm Warning	SHV	Caddo	42 min
May 13, 10:20 PM CDT	Severe Thunderstorm Warning	SHV	Webster	40 min
May 13, 10:24 PM CDT	Severe Thunderstorm Warning	SHV	Union	51 min
May 13, 10:35 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Lincoln	55 min
May 13, 10:44 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Claiborne	61 min
May 13, 11:08 PM CDT	Tornado Warning	SHV	Bossier, Caddo	52 min
May 13, 11:08 PM CDT	Tornado Warning	SHV	Bienville	67 min
May 13, 11:11 PM CDT	Severe Thunderstorm Warning	SHV	Jackson	64 min
May 13, 11:19 PM CDT	Tornado Warning	SHV	Jackson	56 min
May 13, 11:28 PM CDT	Severe Thunderstorm Warning	SHV	Webster	62 min
May 13, 11:48 PM CDT	Severe Thunderstorm Warning	SHV	Bienville	57 min
May 14, 12:00 AM CDT	Tornado Warning	SHV	Caddo, De Soto, Red River	60 min
May 14, 6:02 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Webster	58 min
May 14, 7:34 AM CDT	Severe Thunderstorm Warning	SHV	Franklin	26 min
May 14, 7:41 AM CDT	Severe Thunderstorm Warning	SHV	Titus	34 min

Nearby

Tornado Warnings in Louisiana, 2003 Tornado Warnings in Texas, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.