Alert archive / Louisiana / Tornado Warnings in 2021

Tornado Warning 21, NWS Shreveport, LA

April 7, 20214 parishes in Louisiana

NWS Shreveport, LA issued this tornado warning at Apr 7, 2021, 6:38 PM CDT for 4 parishes in Louisiana. It was in force for 52 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 7, 2021, 6:38 PM CDT (23:38 UTC)
Expired: Apr 7, 2021, 7:30 PM CDT
In force: 52 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Jackson Parish, LA, Lincoln Parish, LA, Ouachita Parish, LA, Union Parish, LA

The radar

The Shreveport radar (KSHV), 169 km from the middle of the area, began a volume at 23:41 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.

What was reported inside it

Time	Report	Where	Remark
Apr 7, 6:48 PM CDT	TORNADO	5 S Downsville, LA	THIS WEAK AND NARROW TORNADO STARTED NEAR THE INTERSECTION OF ABE BENTON ROAD AND SIBLEY ROAD AND TRACKED EAST NORTHEAST FOR ROUGHLY 2 MILES DOING MINOR TREE DAMAGE NORTH OF CALHOUN. LITTLE TO NO STRUCTURAL DAMAGE OBSERVED. PEAK WIND 85 MPH. MAX WIDTH OF 50 YA
Apr 7, 7:02 PM CDT	TSTM WND DMG	7 Ese Farmerville, LA	THUNDERSTORM WINDS BLEW A SMALL PORTION OF TIN ROOF OFF OF A CHICKEN HOUSE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 7, 12:38 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 11.6 hours before the alert went out and 160 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: 532 J/kg
Mixed-layer CIN: -229 J/kg
Mixed-layer LCL: 506 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 267 m²/s²
0-3 km storm-relative helicity: 433 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

095 
WFUS54 KSHV 072338
TORSHV
LAC049-061-073-111-080030-
/O.NEW.KSHV.TO.W.0021.210407T2338Z-210408T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
638 PM CDT Wed Apr 7 2021

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  Northeastern Jackson Parish in north central Louisiana...
  Southeastern Union Parish in north central Louisiana...
  Northern Ouachita Parish in north central Louisiana...
  Southeastern Lincoln Parish in north central Louisiana...

* Until 730 PM CDT.
    
* At 637 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 9 miles east of Ruston, moving northeast at 45 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...
  Claiborne around 655 PM CDT.
  Sterlington around 710 PM CDT.

Other locations impacted by this tornadic thunderstorm include Drew,
Fairbanks, D Arbonne, Perryville, Calhoun, Loch Lomon, Spencer,
Linville, Haile and Folksville.

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 3259 9193 3239 9247 3259 9261 3292 9208
      3287 9208 3284 9206 3283 9207 3280 9205
      3276 9206 3274 9205 3273 9207 3269 9205
      3270 9203 3271 9204 3271 9197 3268 9197
      3266 9194 3267 9193 3265 9192
TIME...MOT...LOC 2337Z 238DEG 39KT 3255 9247 

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

$$

44

2 follow-up statements

227 
WWUS54 KSHV 072352
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
652 PM CDT Wed Apr 7 2021

LAC049-061-080001-
/O.CAN.KSHV.TO.W.0021.000000T0000Z-210408T0030Z/
Jackson LA-Lincoln LA-
652 PM CDT Wed Apr 7 2021

...THE TORNADO WARNING FOR NORTHEASTERN JACKSON AND SOUTHEASTERN
LINCOLN PARISHES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 800 PM CDT for north central
Louisiana.

LAT...LON 3259 9193 3241 9242 3267 9242 3267 9248
      3292 9208 3287 9208 3284 9206 3283 9207
      3279 9205 3276 9206 3274 9205 3273 9207
      3269 9205 3270 9204 3271 9204 3270 9202
      3271 9197 3268 9197 3265 9192
TIME...MOT...LOC 2351Z 238DEG 39KT 3263 9231 

$$

LAC073-111-080030-
/O.CON.KSHV.TO.W.0021.000000T0000Z-210408T0030Z/
Union LA-Ouachita LA-
652 PM CDT Wed Apr 7 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
SOUTHEASTERN UNION AND NORTHERN OUACHITA PARISHES...
    
At 651 PM CDT, a severe thunderstorm capable of producing a tornado
was located 9 miles northwest of Claiborne, moving northeast at 45
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...
  Claiborne around 655 PM CDT.
  Sterlington around 710 PM CDT.

Other locations impacted by this tornadic thunderstorm include Drew,
Fairbanks, Perryville, Calhoun, Loch Lomon, Spencer, Linville, Haile,
Folksville and Cheniere.

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 3259 9193 3241 9242 3267 9242 3267 9248
      3292 9208 3287 9208 3284 9206 3283 9207
      3279 9205 3276 9206 3274 9205 3273 9207
      3269 9205 3270 9204 3271 9204 3270 9202
      3271 9197 3268 9197 3265 9192
TIME...MOT...LOC 2351Z 238DEG 39KT 3263 9231 

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

$$

44

532 
WWUS54 KSHV 080014
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
714 PM CDT Wed Apr 7 2021

LAC073-111-080030-
/O.CON.KSHV.TO.W.0021.000000T0000Z-210408T0030Z/
Union LA-Ouachita LA-
714 PM CDT Wed Apr 7 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
SOUTHEASTERN UNION AND NORTHWESTERN OUACHITA PARISHES...
    
At 713 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Sterlington, or 8 miles west of Bastrop, moving
northeast at 45 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 tornadic thunderstorm will remain over mainly rural areas of
southeastern Union and northwestern Ouachita Parishes, including the
following locations... Deshard, Spencer, Linville, Haile, Rocky
Branch and Loch Lomon.

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 3265 9204 3256 9230 3275 9236 3292 9208
      3287 9208 3284 9206 3283 9207 3279 9205
      3276 9206 3274 9205 3273 9207 3269 9205
      3270 9204
TIME...MOT...LOC 0013Z 238DEG 39KT 3276 9206 

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

$$

44

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 7, 1:22 PM CDT	Severe Thunderstorm Warning	SHV	De Soto, Sabine	38 min
Apr 7, 1:50 PM CDT	Special Weather Statement	SHV	De Soto	40 min
Apr 7, 3:12 PM CDT	Special Weather Statement	SHV	Lincoln, Union	48 min
Apr 7, 3:21 PM CDT	Special Weather Statement	SHV	Claiborne, Webster	39 min
Apr 7, 3:56 PM CDT	Special Weather Statement	SHV	De Soto	49 min
Apr 7, 4:09 PM CDT	Special Weather Statement	SHV	Claiborne	51 min
Apr 7, 4:20 PM CDT	Tornado Warning	SHV	Bienville, Bossier, Caddo, De Soto, Red River	40 min
Apr 7, 4:31 PM CDT	Tornado Warning	SHV	Bienville, Bossier, Caddo, Claiborne, Webster	19 min
Apr 7, 4:52 PM CDT	Tornado Warning	SHV	Bienville, Red River	25 min
Apr 7, 5:16 PM CDT	Tornado Warning	SHV	Bienville, Claiborne, Jackson, Lincoln, Webster	14 min
Apr 7, 5:36 PM CDT	Severe Thunderstorm Warning	SHV	Sabine	39 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.