Alert archive / Texas / Tornado Warnings in 2021

Tornado Warning 24, NWS Shreveport, LA

May 18, 2021Bowie County, Cass County, Texas

NWS Shreveport, LA issued this tornado warning at May 18, 2021, 5:07 PM CDT for Bowie County, Cass County, Texas. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 18, 2021, 5:07 PM CDT (22:07 UTC)
Expired: May 18, 2021, 5:42 PM CDT
In force: 35 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Bowie County, TX, Cass County, TX

The radar

The Shreveport radar (KSHV), 91 km from the middle of the area, began a volume at 22:06 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 18, 3:51 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 10.1 hours before the alert went out and 94 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: 56 J/kg
Mixed-layer CIN: -268 J/kg
Mixed-layer LCL: 968 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

703 
WFUS54 KSHV 182207
TORSHV
TXC037-067-182300-
/O.NEW.KSHV.TO.W.0024.210518T2207Z-210518T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
507 PM CDT Tue May 18 2021

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  Central Cass County in northeastern Texas...
  South central Bowie County in northeastern Texas...

* Until 600 PM CDT.
    
* At 507 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 8 miles northeast of Hughes Springs, or 20 miles west
  of Atlanta, moving northeast at 25 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Maud around 555 PM CDT.

Other locations impacted by this tornadic thunderstorm include Bryans
Mill, Douglassville and Red Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3297 9448 3308 9461 3335 9436 3320 9417
TIME...MOT...LOC 2207Z 224DEG 22KT 3306 9451 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

19

2 follow-up statements

227 
WWUS54 KSHV 182226
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
526 PM CDT Tue May 18 2021

TXC037-067-182300-
/O.CON.KSHV.TO.W.0024.000000T0000Z-210518T2300Z/
Cass TX-Bowie TX-
526 PM CDT Tue May 18 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR NORTH
CENTRAL CASS AND SOUTH CENTRAL BOWIE COUNTIES...
    
At 525 PM CDT, a severe thunderstorm capable of producing a tornado
was located 9 miles north of Linden, or 14 miles west of Atlanta,
moving northeast at 25 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Maud around 555 PM CDT.

Other locations impacted by this tornadic thunderstorm include Bryans
Mill, Douglassville and Red Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3307 9437 3319 9451 3335 9436 3322 9419
TIME...MOT...LOC 2225Z 224DEG 22KT 3314 9442 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

19

883 
WWUS54 KSHV 182242
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
542 PM CDT Tue May 18 2021

TXC037-067-182252-
/O.CAN.KSHV.TO.W.0024.000000T0000Z-210518T2300Z/
Cass TX-Bowie TX-
542 PM CDT Tue May 18 2021

...THE TORNADO WARNING FOR NORTH CENTRAL CASS AND SOUTH CENTRAL BOWIE
COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
northeastern Texas.

LAT...LON 3307 9437 3319 9451 3335 9436 3322 9419
TIME...MOT...LOC 2241Z 224DEG 22KT 3322 9433 

$$

19

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 8:55 AM CDT	River Flood Warning	SHV	Gregg, Rusk	21 days
May 18, 8:55 AM CDT	River Flood Warning	SHV	Gregg, Harrison, Panola, Rusk	21 days
May 18, 9:01 AM CDT	River Flood Warning	SHV	Angelina, Cherokee, Nacogdoches	6 days
May 18, 9:04 AM CDT	River Flood Warning	SHV	Nacogdoches, Rusk	5 days
May 18, 9:04 AM CDT	River Flood Warning	SHV	Cherokee, Nacogdoches, Rusk, Smith	21 days
May 18, 9:11 AM CDT	River Flood Warning	SHV	Sabine, San Augustine	4 days
May 18, 11:15 AM CDT	River Flood Warning	SHV	Upshur, Wood	21 days
May 18, 2:12 PM CDT	Special Weather Statement	SHV	Franklin, Red River, Titus, Wood	48 min
May 18, 2:59 PM CDT	Special Weather Statement	SHV	Franklin, Red River, Titus	46 min
May 18, 3:33 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Red River	57 min
May 18, 3:51 PM CDT	Special Weather Statement	SHV	Bowie, Camp, Morris, Titus, Upshur	54 min
May 18, 4:46 PM CDT	Special Weather Statement	SHV	Bowie, Cass, Morris	59 min
May 18, 5:44 PM CDT	Special Weather Statement	SHV	Cass	46 min

Nearby

Tornado Warnings in Texas, 2021 Every tornado warning in 2021 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.