Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 63, NWS Shreveport, LA

April 9, 20214 parishes in Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 9, 2021, 5:15 PM CDT for 4 parishes in Louisiana. It was in force for 45 min. 6 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 9, 2021, 5:15 PM CDT (22:15 UTC)
Expired
Apr 9, 2021, 6:00 PM CDT
In force
45 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon
Tornado
Possible
Hail
1.0 in
Wind
60.0 mph

Counties Claiborne Parish, LA, Lincoln Parish, LA, Ouachita Parish, LA, Union Parish, LA

The radar

The Shreveport radar (KSHV), 119 km from the middle of the area, began a volume at 22:15 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

TimeReportWhereRemark
Apr 9, 5:15 PM CDTHAIL 1.5Vienna, LAPUBLIC POST PICTURE OF PING PONG BALL SIZE HAIL IN VIENNA VIA SOCIAL MEDIA.
Apr 9, 5:20 PM CDTHAIL 0.885 N Choudrant, LAREPORT OF NICKEL SIZE HAIL NEAR THE DOUGLAS COMMUNITY OFF NEW HOPE ROAD.
Apr 9, 5:20 PM CDTHAIL 1.75Vienna, LAHAIL UP TO PING PONG SIZE IN VIENNA LA NORTH OF RUSTON.
Apr 9, 5:22 PM CDTHAIL 0.754 Ne Ruston, LAPENNY SIZE HAIL REPORTED ON STABLE ROAD.
Apr 9, 5:22 PM CDTHAIL 0.885 Wsw Downsville, LANICKLE-SIZED HAIL REPORTED OFF NEW HOPE ROAD IN DOUGLAS.
Apr 9, 5:30 PM CDTHAIL 1Downsville, LADIME TO QUARTER SIZE HAIL REPORTED IN DOWNSVILLE.

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.

IssuedProductOfficeLasted
Apr 9, 12:07 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 10.3 hours before the alert went out and 110 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-pSkew-T log-p diagram, Shreveport, LA at 12:00Z on 2021-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 928 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 12:00Z on 2021-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
928 J/kg
Mixed-layer CIN
-310 J/kg
Mixed-layer LCL
1043 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
61 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

561 
WUUS54 KSHV 092215
SVRSHV
LAC027-061-073-111-092300-
/O.NEW.KSHV.SV.W.0063.210409T2215Z-210409T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
515 PM CDT Fri Apr 9 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Central Union Parish in north central Louisiana...
  Northwestern Ouachita Parish in north central Louisiana...
  Southeastern Claiborne Parish in northwestern Louisiana...
  Lincoln Parish in north central Louisiana...

* Until 600 PM CDT.

* At 515 PM CDT, a severe thunderstorm was located 10 miles south of
  Bernice, or 11 miles north of Grambling, moving northeast at 40
  mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Ruston, Grambling, Farmerville, Bernice, Dubach, Choudrant,
  Simsboro, Vienna, Lisbon, Downsville, D Arbonne, Spencer, Mount
  Zion, Bayou D Arbonne Lake, Rocky Branch, Corinth, Shiloh,
  Unionville and Eureka.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3254 9288 3278 9288 3296 9236 3274 9211
      3250 9241 3250 9262
TIME...MOT...LOC 2215Z 244DEG 36KT 3269 9271 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

19
2 follow-up statements
088 
WWUS54 KSHV 092233
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
533 PM CDT Fri Apr 9 2021

LAC027-092242-
/O.CAN.KSHV.SV.W.0063.000000T0000Z-210409T2300Z/
Claiborne LA-
533 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLAIBORNE PARISH
IS CANCELLED...
    
The severe 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 1100 PM CDT for
north central Louisiana.

LAT...LON 3271 9270 3285 9268 3296 9236 3274 9211
      3250 9241 3262 9270
TIME...MOT...LOC 2232Z 244DEG 36KT 3277 9252 

$$

LAC061-073-111-092300-
/O.CON.KSHV.SV.W.0063.000000T0000Z-210409T2300Z/
Union LA-Ouachita LA-Lincoln LA-
533 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR CENTRAL UNION...NORTHWESTERN OUACHITA AND NORTHEASTERN LINCOLN
PARISHES...

At 532 PM CDT, a severe thunderstorm was located 7 miles west of
Farmerville, or 17 miles northeast of Ruston, moving northeast at 40
mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Farmerville, Bernice, Dubach, Vienna, Downsville, D Arbonne, Bayou D
Arbonne Lake, Rocky Branch, Shiloh, Spencer, Unionville and Eureka.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3271 9270 3285 9268 3296 9236 3274 9211
      3250 9241 3262 9270
TIME...MOT...LOC 2232Z 244DEG 36KT 3277 9252 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

19
004 
WWUS54 KSHV 092247
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
547 PM CDT Fri Apr 9 2021

LAC061-092257-
/O.CAN.KSHV.SV.W.0063.000000T0000Z-210409T2300Z/
Lincoln LA-
547 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LINCOLN PARISH IS
CANCELLED...
    
The severe 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 1100 PM CDT for
north central Louisiana.

LAT...LON 3296 9236 3274 9211 3250 9241 3294 9242
TIME...MOT...LOC 2247Z 244DEG 36KT 3284 9236 

$$

LAC073-111-092300-
/O.CON.KSHV.SV.W.0063.000000T0000Z-210409T2300Z/
Union LA-Ouachita LA-
547 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR CENTRAL UNION AND NORTHWESTERN OUACHITA PARISHES...

At 547 PM CDT, a severe thunderstorm was located near Farmerville, or
17 miles southwest of Huttig, moving northeast at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Farmerville, Downsville, Spencer, Rocky Branch and Eureka. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3296 9236 3274 9211 3250 9241 3294 9242
TIME...MOT...LOC 2247Z 244DEG 36KT 3284 9236 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

19

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 2:28 PM CDTSevere Thunderstorm WarningSHVBossier, Caddo, Claiborne, Webster32 min
Apr 9, 2:51 PM CDTSpecial Weather StatementSHVCaddo39 min
Apr 9, 4:28 PM CDTSevere Thunderstorm WarningSHVBienville, Claiborne, Lincoln, Webster47 min
Apr 9, 5:01 PM CDTSevere Thunderstorm WarningSHVUnion44 min
Apr 9, 5:38 PM CDTSevere Thunderstorm WarningSHVBossier, Claiborne, Webster67 min
Apr 9, 5:40 PM CDTSpecial Weather StatementSHVDe Soto50 min
Apr 9, 5:44 PM CDTSevere Thunderstorm WarningSHVOuachita, Union46 min
Apr 9, 5:49 PM CDTSevere Thunderstorm WarningSHVDe Soto56 min
Apr 9, 5:54 PM CDTSevere Thunderstorm WarningSHVCaldwell, Jackson, Ouachita, Winn66 min
Apr 9, 5:58 PM CDTSevere Thunderstorm WarningSHVUnion21 min
Apr 9, 6:23 PM CDTSevere Thunderstorm WarningSHVBienville, Jackson, Lincoln, Natchitoches, Red River, Winn52 min
Apr 9, 6:27 PM CDTSpecial Weather StatementSHVBienville48 min
Apr 9, 6:37 PM CDTSpecial Weather StatementSHVOuachita38 min
Apr 9, 6:40 PM CDTSevere Thunderstorm WarningSHVBienville, Claiborne, Lincoln, Union65 min
Apr 9, 6:49 PM CDTSevere Thunderstorm WarningSHVBienville, Caddo, De Soto, Red River56 min
Apr 9, 6:55 PM CDTSevere Thunderstorm WarningSHVOuachita, Union65 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2021Every severe thunderstorm warning 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.