Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 128, NWS Austin/San Antonio, TX

May 17, 2021Val Verde County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 17, 2021, 6:48 PM CDT for Val Verde County, Texas. It was in force for 41 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 17, 2021, 6:48 PM CDT (23:48 UTC)
Expired: May 17, 2021, 7:29 PM CDT
In force: 41 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 148 km from the middle of the area, began a volume at 23:47 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 17, 3:04 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 11.8 hours before the alert went out and 103 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: 2620 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 577 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 181 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

870 
WUUS54 KEWX 172348
SVREWX
TXC465-180045-
/O.NEW.KEWX.SV.W.0128.210517T2348Z-210518T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
648 PM CDT Mon May 17 2021

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Northwestern Val Verde County in south central Texas...

* Until 745 PM CDT.

* At 647 PM CDT, a severe thunderstorm was located near Pandale, or
  24 miles north of Langtry, moving east at 25 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...
  Juno, Pandale and Bakers Crossing. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for south central
Texas.

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

&&

A Tornado Watch remains in effect until 1100 PM CDT for south central
Texas.

LAT...LON 3009 10174 3026 10171 3020 10105 2993 10110
TIME...MOT...LOC 2347Z 279DEG 23KT 3015 10162 

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

BRADY

2 follow-up statements

500 
WWUS54 KEWX 180010
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
710 PM CDT Mon May 17 2021

TXC465-180045-
/O.CON.KEWX.SV.W.0128.000000T0000Z-210518T0045Z/
Val Verde TX-
710 PM CDT Mon May 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR NORTHWESTERN VAL VERDE COUNTY...

At 709 PM CDT, a severe thunderstorm was located near Pandale, or 20
miles west of Juno, moving east at 25 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...
Juno, Pandale and Bakers Crossing. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for south central
Texas.

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

&&

LAT...LON 3005 10160 3025 10157 3020 10105 2993 10110
TIME...MOT...LOC 0009Z 274DEG 23KT 3013 10145 

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

BRADY

539 
WWUS54 KEWX 180029
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
729 PM CDT Mon May 17 2021

TXC465-180039-
/O.CAN.KEWX.SV.W.0128.000000T0000Z-210518T0045Z/
Val Verde TX-
729 PM CDT Mon May 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN VAL VERDE COUNTY
IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However small hail and
gusty winds are still possible with this thunderstorm.

A Tornado Watch remains in effect until 1100 PM CDT for south central
Texas.

LAT...LON 3005 10160 3025 10157 3020 10105 2993 10110
TIME...MOT...LOC 0028Z 279DEG 23KT 3011 10130 

$$

BRADY

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 17, 9:21 AM CDT	River Flood Warning	EWX	Frio	19 hr
May 17, 11:36 AM CDT	Special Weather Statement	EWX	Burnet	54 min
May 17, 11:58 AM CDT	Special Weather Statement	EWX	Burnet	47 min
May 17, 12:05 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Llano	55 min
May 17, 1:00 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Travis, Williamson	60 min
May 17, 1:53 PM CDT	Special Weather Statement	EWX	Bastrop, Hays, Travis, Williamson	52 min
May 17, 2:34 PM CDT	Flash Flood Watch	EWX	Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 19 more	55 hr
May 17, 2:37 PM CDT	Special Weather Statement	EWX	Comal	38 min
May 17, 3:16 PM CDT	Special Weather Statement	EWX	Fayette, Gonzales	44 min
May 17, 3:25 PM CDT	Areal Flood Advisory	EWX	Fayette	3 hr
May 17, 3:51 PM CDT	Special Weather Statement	EWX	Comal	39 min
May 17, 3:59 PM CDT	Special Weather Statement	EWX	Gonzales, Lavaca	61 min
May 17, 4:15 PM CDT	Areal Flood Advisory	EWX	Gonzales, Lavaca	2 hr
May 17, 5:05 PM CDT	Special Weather Statement	EWX	Lavaca	40 min
May 17, 6:08 PM CDT	Special Weather Statement	EWX	Val Verde	52 min
May 17, 6:11 PM CDT	Special Weather Statement	EWX	Dimmit	49 min
May 17, 6:46 PM CDT	Special Weather Statement	EWX	Dimmit	44 min
May 17, 6:50 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit	25 min

Nearby

Severe Thunderstorm Warnings in Texas, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.