Alert archive / Louisiana / Tornado Warnings in 2021

Tornado Warning 17, NWS Shreveport, LA

April 7, 20215 parishes in Louisiana

NWS Shreveport, LA issued this tornado warning at Apr 7, 2021, 4:20 PM CDT for 5 parishes in Louisiana. It was in force for 40 min. 3 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, 4:20 PM CDT (21:20 UTC)
Expired: Apr 7, 2021, 5:00 PM CDT
In force: 40 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, De Soto Parish, LA, Red River Parish, LA

The radar

The Shreveport radar (KSHV), 42 km from the middle of the area, began a volume at 21:22 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, 4:35 PM CDT	TORNADO	10 W Hall Summit, LA	A TORNADO TOUCHED DOWN ALONG HWY 1 NEAR THE WESTDALE COMMUNITY, SNAPPING AND UPROOTING NUMEROUS TREES ALONG ITS 13.6 MILE TRACK, BEFORE LIFTING ALONG US HWY 371 JUST NORTH OF WOODARDVILLE. THE TRACK WIDTH WAS 300 YDS AT ITS WIDEST PONIT, AND MAXIMUM WINDS WERE
Apr 7, 4:55 PM CDT	TSTM WND DMG	5 Nnw Hall Summit, LA	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 5 NNW HALL SUMMIT. REPORT OF ROOF DAMAGE ALONG HWY 783 NEAR RINGGOLD / SPRINGHILL BAPTIST CHURCH.
Apr 7, 4:55 PM CDT	TSTM WND DMG	5 W Hall Summit, LA	LARGE OAK TREE BLOWN DOWN.

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, 9.3 hours before the alert went out and 40 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.

191 
WFUS54 KSHV 072120
TORSHV
LAC013-015-017-031-081-072200-
/O.NEW.KSHV.TO.W.0017.210407T2120Z-210407T2200Z/

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

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  Central De Soto Parish in northwestern Louisiana...
  Northern Red River Parish in northwestern Louisiana...
  Southeastern Caddo Parish in northwestern Louisiana...
  Southwestern Bienville Parish in northwestern Louisiana...
  Southeastern Bossier Parish in northwestern Louisiana...

* Until 500 PM CDT.
    
* At 420 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 8 miles north of Mansfield, moving east at 40 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...
  Ringgold around 500 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Womack, Ninock, Carmel, Frierson, Crichton, Hall Summit, Caspiana,
Kingston and Loggy Bayou.

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 3203 9372 3222 9380 3239 9329 3216 9321
TIME...MOT...LOC 2120Z 250DEG 36KT 3216 9368 

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

$$

44

1 follow-up statement

134 
WWUS54 KSHV 072142
SVSSHV

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

LAC013-015-017-031-081-072200-
/O.CON.KSHV.TO.W.0017.000000T0000Z-210407T2200Z/
De Soto LA-Red River LA-Caddo LA-Bienville LA-Bossier LA-
442 PM CDT Wed Apr 7 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR EAST
CENTRAL DE SOTO...NORTHERN RED RIVER...SOUTHEASTERN CADDO...
SOUTHWESTERN BIENVILLE AND SOUTHEASTERN BOSSIER PARISHES...
        
At 441 PM CDT, a confirmed tornado was located 10 miles southwest of
Ringgold, or 20 miles northeast of Mansfield, moving east at 40 mph.

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado.

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 tornado will be near...
  Ringgold around 500 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Womack, Ninock, Crichton, Hall Summit, Caspiana and Loggy Bayou.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 3208 9352 3228 9361 3239 9329 3216 9321
TIME...MOT...LOC 2141Z 250DEG 36KT 3223 9344 

TORNADO...OBSERVED
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, 4:31 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
Apr 7, 6:38 PM CDT	Tornado Warning	SHV	Jackson, Lincoln, Ouachita, Union	52 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.