Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 99, NWS Shreveport, LA

April 14, 20214 counties in Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 14, 2021, 4:54 AM CDT for 4 counties in Texas. It was in force for 50 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 14, 2021, 4:54 AM CDT (09:54 UTC)
Expired
Apr 14, 2021, 5:44 AM CDT
In force
50 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon
Hail
1.5 in
Wind
50.0 mph

Counties Bowie County, TX, Morris County, TX, Red River County, TX, Titus County, TX

The radar

The Shreveport radar (KSHV), 138 km from the middle of the area, began a volume at 09:54 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 14, 5:27 AM CDTHAIL 11 Ese De Kalb, TXPUBLIC REPORT OF HAIL UP TO QUARTER SIZE ON THE EAST SIDE OF DE KALB.

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, 9.9 hours before the alert went out and 139 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 00:00Z on 2021-04-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1508 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2021-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -34 square meters per square second.19395878Sfc1 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
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.

333 
WUUS54 KSHV 140954
SVRSHV
TXC037-343-387-449-141100-
/O.NEW.KSHV.SV.W.0099.210414T0954Z-210414T1100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
454 AM CDT Wed Apr 14 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Northwestern Bowie County in northeastern Texas...
  Northwestern Morris County in northeastern Texas...
  Northeastern Titus County in northeastern Texas...
  Southeastern Red River County in northeastern Texas...

* Until 600 AM CDT.

* At 454 AM CDT, a severe thunderstorm was located near Wilkerson, or
  9 miles northeast of Mount Pleasant, moving northeast at 40 mph.

  HAZARD...Ping pong ball size hail.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect 
           damage to roofs, siding, windows, and vehicles.

* Locations impacted include...
  New Boston, De Kalb, Dalby Springs, Lydia, Almont and Red Bank. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3328 9501 3367 9459 3366 9457 3364 9459
      3365 9455 3363 9457 3364 9453 3362 9453
      3363 9452 3361 9446 3360 9446 3357 9441
      3358 9438 3356 9440 3354 9438 3357 9434
      3355 9432 3356 9430 3353 9421 3321 9496
TIME...MOT...LOC 0954Z 238DEG 37KT 3330 9491 

HAIL...1.50IN
WIND...<50MPH
 
$$

15
2 follow-up statements
372 
WWUS54 KSHV 141016
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
516 AM CDT Wed Apr 14 2021

TXC343-387-449-141026-
/O.CAN.KSHV.SV.W.0099.000000T0000Z-210414T1100Z/
Morris TX-Titus TX-Red River TX-
516 AM CDT Wed Apr 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MORRIS...
NORTHEASTERN TITUS AND SOUTHEASTERN RED RIVER COUNTIES IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3346 9474 3367 9459 3366 9457 3364 9459
      3365 9455 3363 9457 3364 9453 3362 9453
      3363 9452 3361 9446 3360 9446 3357 9441
      3358 9438 3356 9440 3354 9438 3357 9434
      3355 9432 3356 9430 3353 9421 3333 9474
TIME...MOT...LOC 1016Z 237DEG 38KT 3343 9466 

$$

TXC037-141100-
/O.CON.KSHV.SV.W.0099.000000T0000Z-210414T1100Z/
Bowie TX-
516 AM CDT Wed Apr 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 AM CDT
FOR NORTHWESTERN BOWIE COUNTY...

At 516 AM CDT, a severe thunderstorm was located near Dalby Springs,
or 12 miles east of Boxelder, moving northeast at 45 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
New Boston, De Kalb, Dalby Springs, Almont and Red Bank. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3346 9474 3367 9459 3366 9457 3364 9459
      3365 9455 3363 9457 3364 9453 3362 9453
      3363 9452 3361 9446 3360 9446 3357 9441
      3358 9438 3356 9440 3354 9438 3357 9434
      3355 9432 3356 9430 3353 9421 3333 9474
TIME...MOT...LOC 1016Z 237DEG 38KT 3343 9466 

HAIL...1.00IN
WIND...<50MPH
 
$$

15
925 
WWUS54 KSHV 141044
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
544 AM CDT Wed Apr 14 2021

TXC037-141054-
/O.CAN.KSHV.SV.W.0099.000000T0000Z-210414T1100Z/
Bowie TX-
544 AM CDT Wed Apr 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BOWIE COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

LAT...LON 3346 9474 3367 9459 3366 9457 3364 9459
      3365 9455 3363 9457 3364 9453 3362 9453
      3363 9452 3361 9446 3360 9446 3357 9441
      3358 9438 3356 9440 3354 9438 3357 9434
      3355 9432 3356 9430 3353 9421 3333 9474
TIME...MOT...LOC 1043Z 238DEG 37KT 3359 9436 

$$

15

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 13, 7:16 PM CDTSevere Thunderstorm WarningSHVHarrison, Panola44 min
Apr 13, 7:30 PM CDTSpecial Weather StatementSHVShelby30 min
Apr 13, 8:00 PM CDTSevere Thunderstorm WarningSHVHarrison, Panola38 min
Apr 13, 9:28 PM CDTSpecial Weather StatementSHVCherokee62 min
Apr 13, 10:24 PM CDTSpecial Weather StatementSHVRusk36 min
Apr 14, 12:55 AM CDTSpecial Weather StatementSHVSmith35 min
Apr 14, 1:13 AM CDTSpecial Weather StatementSHVSmith32 min
Apr 14, 1:27 AM CDTSevere Thunderstorm WarningSHVSmith, Upshur, Wood63 min
Apr 14, 1:59 AM CDTSpecial Weather StatementSHVUpshur31 min
Apr 14, 2:09 AM CDTSpecial Weather StatementSHVGregg36 min
Apr 14, 2:33 AM CDTSpecial Weather StatementSHVUpshur42 min
Apr 14, 2:41 AM CDTSpecial Weather StatementSHVGregg49 min
Apr 14, 3:30 AM CDTSpecial Weather StatementSHVMarion45 min
Apr 14, 4:29 AM CDTSpecial Weather StatementSHVFranklin, Titus46 min

Nearby

Severe Thunderstorm Warnings in Texas, 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.