Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 59, NWS Shreveport, LA

April 9, 20214 parishes in Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 9, 2021, 4:28 PM CDT for 4 parishes in Louisiana. It was in force for 47 min. 1 report 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, 4:28 PM CDT (21:28 UTC)
Expired: Apr 9, 2021, 5:15 PM CDT
In force: 47 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Bienville Parish, LA, Claiborne Parish, LA, Lincoln Parish, LA, Webster Parish, LA

The radar

The Shreveport radar (KSHV), 74 km from the middle of the area, began a volume at 21:30 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 9, 4:50 PM CDT	TSTM WND DMG	3 Ene Gibsland, LA	PUBLIC REPORTS LARGE TREE DOWN ON HWY 80 BETWEEN GIBSLAND AND ARCADIA.

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 9, 12:07 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 9.5 hours before the alert went out and 65 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: 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.

207 
WUUS54 KSHV 092128
SVRSHV
LAC013-027-061-119-092215-
/O.NEW.KSHV.SV.W.0059.210409T2128Z-210409T2215Z/

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

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Southeastern Webster Parish in northwestern Louisiana...
  Southeastern Claiborne Parish in northwestern Louisiana...
  North central Bienville Parish in northwestern Louisiana...
  Northwestern Lincoln Parish in north central Louisiana...

* Until 515 PM CDT.

* At 428 PM CDT, a severe thunderstorm was located over Dubberly, or
  near Minden, moving northeast at 50 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Minden, Homer, Arcadia, Sibley, Gibsland, Dubberly, Dixie Inn,
  Heflin, Athens, Lisbon, Mount Lebanon, Holly Springs, Antioch,
  Mount Zion, Aycock, Spring Lake, Gilark, Lake Clairborne, Corinth
  and Ogden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3244 9326 3263 9338 3296 9286 3264 9265
TIME...MOT...LOC 2128Z 238DEG 48KT 3257 9323 

HAIL...1.25IN
WIND...60MPH
 
$$

19

2 follow-up statements

370 
WWUS54 KSHV 092146
SVSSHV

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

LAC119-092155-
/O.CAN.KSHV.SV.W.0059.000000T0000Z-210409T2215Z/
Webster LA-
446 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WEBSTER 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 600 PM CDT for
north central and northwestern Louisiana.

LAT...LON 3248 9314 3275 9319 3296 9286 3264 9265
TIME...MOT...LOC 2145Z 238DEG 48KT 3269 9300 

$$

LAC013-027-061-092215-
/O.CON.KSHV.SV.W.0059.000000T0000Z-210409T2215Z/
Claiborne LA-Bienville LA-Lincoln LA-
446 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHEASTERN CLAIBORNE...NORTH CENTRAL BIENVILLE AND NORTHWESTERN
LINCOLN PARISHES...

At 445 PM CDT, a severe thunderstorm was located near Gibsland, or 7 
miles southeast of Homer, moving northeast at 50 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Homer, Arcadia, Gibsland, Athens, Lisbon, Mount Lebanon, Holly
Springs, Antioch, Mount Zion, Aycock, Spring Lake, Lake Clairborne,
Corinth and Ada.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3248 9314 3275 9319 3296 9286 3264 9265
TIME...MOT...LOC 2145Z 238DEG 48KT 3269 9300 

HAIL...1.25IN
WIND...60MPH
 
$$

19

443 
WWUS54 KSHV 092204
SVSSHV

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

LAC013-027-061-092215-
/O.CON.KSHV.SV.W.0059.000000T0000Z-210409T2215Z/
Claiborne LA-Bienville LA-Lincoln LA-
504 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHEASTERN CLAIBORNE...NORTHEASTERN BIENVILLE AND NORTHWESTERN
LINCOLN PARISHES...

At 504 PM CDT, a severe thunderstorm was located near Bernice, or 13
miles south of Junction City, moving northeast at 50 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Arcadia, Lisbon, Corinth, Mount Zion and Aycock. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3254 9296 3272 9300 3287 9280 3264 9265
TIME...MOT...LOC 2204Z 238DEG 48KT 3282 9274 

HAIL...1.25IN
WIND...60MPH
 
$$

19

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 2:28 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Claiborne, Webster	32 min
Apr 9, 2:51 PM CDT	Special Weather Statement	SHV	Caddo	39 min
Apr 9, 5:01 PM CDT	Severe Thunderstorm Warning	SHV	Union	44 min
Apr 9, 5:15 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Lincoln, Ouachita, Union	45 min
Apr 9, 5:38 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Claiborne, Webster	67 min
Apr 9, 5:40 PM CDT	Special Weather Statement	SHV	De Soto	50 min
Apr 9, 5:44 PM CDT	Severe Thunderstorm Warning	SHV	Ouachita, Union	46 min
Apr 9, 5:49 PM CDT	Severe Thunderstorm Warning	SHV	De Soto	56 min
Apr 9, 5:54 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Jackson, Ouachita, Winn	66 min
Apr 9, 5:58 PM CDT	Severe Thunderstorm Warning	SHV	Union	21 min
Apr 9, 6:23 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Jackson, Lincoln, Natchitoches, Red River, Winn	52 min
Apr 9, 6:27 PM CDT	Special Weather Statement	SHV	Bienville	48 min
Apr 9, 6:37 PM CDT	Special Weather Statement	SHV	Ouachita	38 min
Apr 9, 6:40 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Lincoln, Union	65 min
Apr 9, 6:49 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Caddo, De Soto, Red River	56 min
Apr 9, 6:55 PM CDT	Severe Thunderstorm Warning	SHV	Ouachita, Union	65 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2021 Every 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.