Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 64, NWS Shreveport, LA

April 9, 2021Bossier Parish, Claiborne Parish, Webster Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 9, 2021, 5:38 PM CDT for Bossier Parish, Claiborne Parish, Webster Parish, Louisiana. It was in force for 67 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, 5:38 PM CDT (22:38 UTC)
Expired: Apr 9, 2021, 6:45 PM CDT
In force: 67 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Bossier Parish, LA, Claiborne Parish, LA, Webster Parish, LA

The radar

The Shreveport radar (KSHV), 68 km from the middle of the area, began a volume at 22:42 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, 6:10 PM CDT	HAIL 1.25	Minden, LA	SOCIAL MEDIA REPORTS OF HAIL RANGING FROM NICKEL TO HALF DOLLAR SIZE IN THE CITY OF MINDEN.

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
Apr 9, 5:32 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 10.6 hours before the alert went out and 59 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.

567 
WUUS54 KSHV 092238
SVRSHV
LAC015-027-119-092345-
/O.NEW.KSHV.SV.W.0064.210409T2238Z-210409T2345Z/

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

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Central Webster Parish in northwestern Louisiana...
  Claiborne Parish in northwestern Louisiana...
  East central Bossier Parish in northwestern Louisiana...

* Until 645 PM CDT.

* At 538 PM CDT, a severe thunderstorm was located near Haughton, or
  10 miles west of Minden, 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...
  Minden, Homer, Haughton, Sibley, Doyline, Dixie Inn, Dubberly,
  Eastwood, Evergreen, Athens, Lisbon, Princeton, Fillmore, Holly
  Springs, Bellevue, Aycock, Spring Lake, Gilark, Lake Clairborne and
  Couchwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3272 9283 3258 9315 3259 9318 3257 9318
      3244 9348 3265 9361 3298 9298
TIME...MOT...LOC 2238Z 241DEG 33KT 3260 9345 

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

19

2 follow-up statements

440 
WWUS54 KSHV 092250
SVSSHV

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

LAC015-092300-
/O.CAN.KSHV.SV.W.0064.000000T0000Z-210409T2345Z/
Bossier LA-
550 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL BOSSIER 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
northwestern Louisiana.

LAT...LON 3272 9283 3258 9314 3259 9318 3257 9318
      3246 9344 3250 9344 3250 9345 3274 9345
      3298 9298
TIME...MOT...LOC 2250Z 241DEG 33KT 3265 9333 

$$

LAC027-119-092345-
/O.CON.KSHV.SV.W.0064.000000T0000Z-210409T2345Z/
Webster LA-Claiborne LA-
550 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR CENTRAL WEBSTER AND CLAIBORNE PARISHES...

At 550 PM CDT, a severe thunderstorm was located near Minden, 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...
Minden, Homer, Sibley, Doyline, Dixie Inn, Dubberly, Evergreen,
Athens, Lisbon, Holly Springs, Aycock, Spring Lake, Gilark, Lake
Clairborne and Couchwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3272 9283 3258 9314 3259 9318 3257 9318
      3246 9344 3250 9344 3250 9345 3274 9345
      3298 9298
TIME...MOT...LOC 2250Z 241DEG 33KT 3265 9333 

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

19

816 
WWUS54 KSHV 092325
SVSSHV

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

LAC119-092335-
/O.CAN.KSHV.SV.W.0064.000000T0000Z-210409T2345Z/
Webster LA-
625 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL 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 1100 PM CDT for
northwestern Louisiana.

LAT...LON 3272 9283 3258 9313 3259 9318 3263 9317
      3265 9318 3266 9318 3267 9319 3271 9319
      3272 9324 3285 9324 3298 9298
TIME...MOT...LOC 2325Z 241DEG 33KT 3281 9299 

$$

LAC027-092345-
/O.CON.KSHV.SV.W.0064.000000T0000Z-210409T2345Z/
Claiborne LA-
625 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR CLAIBORNE PARISH...

At 625 PM CDT, a severe thunderstorm was located near Homer, 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...
Homer, Athens, Lisbon, Spring Lake, Holly Springs, Lake Clairborne
and Aycock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3272 9283 3258 9313 3259 9318 3263 9317
      3265 9318 3266 9318 3267 9319 3271 9319
      3272 9324 3285 9324 3298 9298
TIME...MOT...LOC 2325Z 241DEG 33KT 3281 9299 

HAIL...1.00IN
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, 4:28 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Lincoln, Webster	47 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, 5:40 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.