Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 97, NWS Shreveport, LA

April 13, 2021Harrison County, Panola County, Texas; Caddo Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 13, 2021, 8:00 PM CDT for Harrison County, Panola County, Texas; Caddo Parish, Louisiana. It was in force for 38 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 13, 2021, 8:00 PM CDT (01:00 UTC)
Expired: Apr 13, 2021, 8:38 PM CDT
In force: 38 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Caddo Parish, LA, Harrison County, TX, Panola County, TX

The radar

The Shreveport radar (KSHV), 24 km from the middle of the area, began a volume at 01:00 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 13, 8:00 PM CDT	HAIL 1	13 Ssw Waskom, TX

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

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 1.0 hours before the alert went out and 32 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: 1508 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1286 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

366 
WUUS54 KSHV 140100
SVRSHV
LAC017-TXC203-365-140200-
/O.NEW.KSHV.SV.W.0097.210414T0100Z-210414T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
800 PM CDT Tue Apr 13 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  West central Caddo Parish in northwestern Louisiana...
  Southeastern Harrison County in northeastern Texas...
  Northeastern Panola County in northeastern Texas...

* Until 900 PM CDT.

* At 800 PM CDT, severe thunderstorms were located along a line
  extending from near Elysian Fields to near Deberry to 7 miles
  southwest of Greenwood, moving north at 25 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...
  Shreveport, Greenwood, Blanchard, Waskom, Mooringsport, Deberry,
  Elysian Fields, Jonesville, Cross Lake, Bethany and Leigh.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3261 9421 3269 9397 3257 9383 3230 9397
      3227 9416 3231 9430
TIME...MOT...LOC 0100Z 200DEG 23KT 3234 9423 3233 9414 3235 9404 

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

24

2 follow-up statements

411 
WWUS54 KSHV 140122
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
822 PM CDT Tue Apr 13 2021

TXC365-140131-
/O.CAN.KSHV.SV.W.0097.000000T0000Z-210414T0200Z/
Panola TX-
822 PM CDT Tue Apr 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PANOLA COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 3261 9421 3269 9397 3255 9393 3239 9400
      3239 9423
TIME...MOT...LOC 0121Z 200DEG 23KT 3244 9419 3243 9410 3245 9400 

$$

LAC017-TXC203-140200-
/O.CON.KSHV.SV.W.0097.000000T0000Z-210414T0200Z/
Caddo LA-Harrison TX-
822 PM CDT Tue Apr 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR WEST CENTRAL CADDO PARISH IN NORTHWESTERN LOUISIANA AND
SOUTHEASTERN HARRISON COUNTIES...

At 821 PM CDT, severe thunderstorms were located along a line
extending from near Elysian Fields to near Waskom to Greenwood,
moving north at 15 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...
Greenwood, Waskom, Mooringsport, Jonesville, Bethany and Leigh. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3261 9421 3269 9397 3255 9393 3239 9400
      3239 9423
TIME...MOT...LOC 0121Z 200DEG 23KT 3244 9419 3243 9410 3245 9400 

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

24

647 
WWUS54 KSHV 140138
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
838 PM CDT Tue Apr 13 2021

LAC017-TXC203-140147-
/O.CAN.KSHV.SV.W.0097.000000T0000Z-210414T0200Z/
Caddo LA-Harrison TX-
838 PM CDT Tue Apr 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL CADDO PARISH IN
NORTHWESTERN LOUISIANA AND SOUTHEASTERN HARRISON COUNTIES IS
CANCELLED...

The line of storms which prompted the warning has weakened. 
Therefore, the warning has been cancelled.

LAT...LON 3261 9421 3269 9397 3255 9393 3239 9400
      3239 9423
TIME...MOT...LOC 0132Z 200DEG 23KT 3251 9416 3250 9407 3252 9397 

$$

24

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 7:16 PM CDT	Severe Thunderstorm Warning	SHV	Harrison, Panola	44 min
Apr 13, 7:30 PM CDT	Special Weather Statement	SHV	Shelby	30 min
Apr 13, 9:28 PM CDT	Special Weather Statement	SHV	Cherokee	62 min
Apr 13, 10:24 PM CDT	Special Weather Statement	SHV	Rusk	36 min
Apr 14, 12:55 AM CDT	Special Weather Statement	SHV	Smith	35 min
Apr 14, 1:13 AM CDT	Special Weather Statement	SHV	Smith	32 min
Apr 14, 1:27 AM CDT	Severe Thunderstorm Warning	SHV	Smith, Upshur, Wood	63 min
Apr 14, 1:59 AM CDT	Special Weather Statement	SHV	Upshur	31 min
Apr 14, 2:09 AM CDT	Special Weather Statement	SHV	Gregg	36 min
Apr 14, 2:33 AM CDT	Special Weather Statement	SHV	Upshur	42 min
Apr 14, 2:41 AM CDT	Special Weather Statement	SHV	Gregg	49 min
Apr 14, 3:30 AM CDT	Special Weather Statement	SHV	Marion	45 min
Apr 14, 4:29 AM CDT	Special Weather Statement	SHV	Franklin, Titus	46 min
Apr 14, 4:54 AM CDT	Severe Thunderstorm Warning	SHV	Bowie, Morris, Red River, Titus	50 min
Apr 14, 4:13 AM CDT	Special Weather Statement	SHV	Bossier	62 min
Apr 14, 5:13 AM CDT	Special Weather Statement	SHV	Bienville	62 min
Apr 14, 5:25 AM CDT	Special Weather Statement	SHV	Bossier	65 min
Apr 14, 5:38 AM CDT	Severe Thunderstorm Warning	SHV	Grant, LaSalle, Winn	41 min
Apr 14, 5:41 AM CDT	Special Weather Statement	SHV	Bossier	49 min
Apr 14, 6:31 AM CDT	Special Weather Statement	SHV	Claiborne, Webster	59 min
Apr 14, 7:28 AM CDT	Special Weather Statement	SHV	Claiborne	62 min
Apr 14, 8:29 AM CDT	Special Weather Statement	SHV	Union	61 min
Apr 14, 10:09 AM CDT	Special Weather Statement	SHV	Natchitoches	51 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021 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.