Alert archive / Louisiana / Tornado Warnings in 2003

Tornado Warning 21, NWS Shreveport, LA

May 7, 2003Bossier Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at May 7, 2003, 2:44 AM CDT for Bossier Parish, Louisiana. It was in force for 61 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 7, 2003, 2:44 AM CDT (07:44 UTC)
Expired: May 7, 2003, 3:45 AM CDT
In force: 61 min
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

County Bossier Parish, LA

The radar

The Shreveport radar (KSHV), 48 km from the middle of the area, began a volume at 07:46 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 6, 11:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 7.7 hours before the alert went out and 42 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: 2206 J/kg
Mixed-layer CIN: -215 J/kg
Mixed-layer LCL: 1131 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 303 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 11.5

Open this sounding in Storm Lab

The text

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

288 
WFUS54 KSHV 070744
TORSHV
LAC015-070845-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
243 AM CDT WED MAY 7 2003

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

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

* UNTIL 345 AM CDT

* AT 243 AM CDT...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER    
  RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 
  7 MILES NORTHWEST OF BENTON...OR ABOUT 12 MILES SOUTHEAST OF       
  VIVIAN...MOVING EAST AT 25 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  5 MILES NORTH OF BENTON AT 255 AM CDT

THIS THUNDERSTORM CAN PRODUCE A TORNADO THAT IS OBSCURED BY RAIN...
AND DIFFICULT TO SEE.

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

IF YOU ARE IN A MOBILE HOME...ABANDON IT FOR A STURDY BUILDING...OR
GET IN A DITCH OR CULVERT.

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
FOR...
  BOSSIER PARISH IN NORTHWEST LOUISIANA
UNTIL 345 AM CDT.

LAT...LON 3302 9378 3260 9376 3261 9346 3301 9350

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 2:03 AM CDT	Severe Thunderstorm Warning	SHV	Caddo	57 min
May 7, 2:16 AM CDT	Tornado Warning	SHV	Caddo	59 min
May 7, 2:35 AM CDT	Severe Thunderstorm Warning	SHV	Bossier	55 min
May 7, 3:21 AM CDT	Severe Thunderstorm Warning	SHV	Webster	54 min
May 7, 3:52 AM CDT	Severe Thunderstorm Warning	SHV	Claiborne	53 min
May 7, 4:33 AM CDT	Flash Flood Warning	SHV	Claiborne	3 hr
May 7, 4:57 AM CDT	Severe Thunderstorm Warning	SHV	Lincoln	63 min
May 7, 5:11 AM CDT	Severe Thunderstorm Warning	SHV	Union	64 min
May 7, 5:44 AM CDT	Severe Thunderstorm Warning	SHV	Ouachita	61 min

Nearby

Tornado Warnings in Louisiana, 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.