Alert archive / Louisiana / Tornado Warnings in 2021

Tornado Warning 2, NWS Shreveport, LA

February 28, 2021Bossier Parish, Caddo Parish, Webster Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Feb 28, 2021, 8:08 PM CST for Bossier Parish, Caddo Parish, Webster Parish, Louisiana. It was in force for 52 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 28, 2021, 8:08 PM CST (02:08 UTC)
Expired: Feb 28, 2021, 9:00 PM CST
In force: 52 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Bossier Parish, LA, Caddo Parish, LA, Webster Parish, LA

The radar

The Shreveport radar (KSHV), 51 km from the middle of the area, began a volume at 02:06 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 28, 5:54 PM CST	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 2.1 hours before the alert went out and 45 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: 1289 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 813 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 203 m²/s²
0-3 km storm-relative helicity: 213 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 7.9

Open this sounding in Storm Lab

The text

As transmitted.

417 
WFUS54 KSHV 010208
TORSHV
LAC015-017-119-010300-
/O.NEW.KSHV.TO.W.0002.210301T0208Z-210301T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
808 PM CST Sun Feb 28 2021

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  Northwestern Webster Parish in northwestern Louisiana...
  Northwestern Caddo Parish in northwestern Louisiana...
  Northern Bossier Parish in northwestern Louisiana...

* Until 900 PM CST.
    
* At 808 PM CST, a severe thunderstorm capable of producing a tornado
  was located near Belcher, or 20 miles north of Shreveport, moving
  northeast at 35 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Benton and Gilliam around 820 PM CST.
  Plain Dealing around 835 PM CST.
  Sarepta around 855 PM CST.
  Springhill and Cullen around 900 PM CST.

Other locations impacted by this tornadic thunderstorm include Dixie,
Ivan, Alden Bridge, Rocky Mount, Cavett and Bolinger.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3285 9331 3264 9393 3280 9403 3302 9361
      3302 9341
TIME...MOT...LOC 0208Z 243DEG 31KT 3276 9390 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

44

2 follow-up statements

293 
WWUS54 KSHV 010230
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
830 PM CST Sun Feb 28 2021

LAC017-010240-
/O.CAN.KSHV.TO.W.0002.000000T0000Z-210301T0300Z/
Caddo LA-
830 PM CST Sun Feb 28 2021

...THE TORNADO WARNING FOR NORTHWESTERN CADDO PARISH IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM CST for
southwestern Arkansas...and northwestern Louisiana.

LAT...LON 3271 9372 3293 9379 3302 9361 3302 9341
      3285 9331
TIME...MOT...LOC 0230Z 243DEG 31KT 3285 9370 

$$

LAC015-119-010300-
/O.CON.KSHV.TO.W.0002.000000T0000Z-210301T0300Z/
Webster LA-Bossier LA-
830 PM CST Sun Feb 28 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CST FOR
NORTHWESTERN WEBSTER AND NORTHERN BOSSIER PARISHES...
    
At 830 PM CST, a severe thunderstorm capable of producing a tornado
was located near Plain Dealing, or 17 miles southwest of Springhill,
moving northeast at 35 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Sarepta around 855 PM CST.
  Springhill and Cullen around 900 PM CST.

Other locations impacted by this tornadic thunderstorm include Ivan,
Alden Bridge, Rocky Mount and Bolinger.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3271 9372 3293 9379 3302 9361 3302 9341
      3285 9331
TIME...MOT...LOC 0230Z 243DEG 31KT 3285 9370 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

44

408 
WWUS54 KSHV 010251
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
851 PM CST Sun Feb 28 2021

LAC015-119-010301-
/O.EXP.KSHV.TO.W.0002.000000T0000Z-210301T0300Z/
Webster LA-Bossier LA-
851 PM CST Sun Feb 28 2021

...THE TORNADO WARNING FOR NORTHWESTERN WEBSTER AND NORTHERN BOSSIER
PARISHES WILL EXPIRE AT 900 PM CST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 PM CST for
southwestern Arkansas...and northwestern Louisiana.

LAT...LON 3271 9372 3293 9379 3302 9361 3302 9341
      3285 9331
TIME...MOT...LOC 0251Z 243DEG 31KT 3292 9353 

$$

44

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 6:07 PM CST	Tornado Warning	SHV	Bossier, Caddo	38 min
Feb 28, 6:44 PM CST	Severe Thunderstorm Warning	SHV	Bossier, Caddo	31 min
Mar 1, 12:27 PM CST	River Flood Warning	SHV	Bienville, Bossier, Red River, Webster	11 days

Nearby

Tornado Warnings in Louisiana, 2021 Every tornado warning in 2021 Tornadoes in 2021

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.