Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 35, NWS Austin/San Antonio, TX

April 15, 2021Edwards County, Val Verde County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 15, 2021, 8:31 AM CDT for Edwards County, Val Verde County, Texas. It was in force for 59 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: Apr 15, 2021, 8:31 AM CDT (13:31 UTC)
Expired: Apr 15, 2021, 9:30 AM CDT
In force: 59 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Edwards County, TX, Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 62 km from the middle of the area, began a volume at 13:33 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 nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 1.5 hours before the alert went out and 46 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: 2593 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 634 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 338 m²/s²
Significant tornado parameter: 4.6
Supercell composite: 21.4

Open this sounding in Storm Lab

The text

As transmitted.

434 
WUUS54 KEWX 151331
SVREWX
TXC137-465-151430-
/O.NEW.KEWX.SV.W.0035.210415T1331Z-210415T1430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
Issued by National Weather Service Corpus Christi TX
831 AM CDT Thu Apr 15 2021

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Southwestern Edwards County in south central Texas...
  East central Val Verde County in south central Texas...

* Until 930 AM CDT

* At 830 AM CDT, a severe thunderstorm was located near Carta Valley,
  or 11 miles south of Loma Alta, moving east 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...
  Carta Valley and Kickapoo Cavern State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2967 10079 2985 10078 2988 10038 2963 10040
TIME...MOT...LOC 1330Z 272DEG 14KT 2976 10070 

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

87

2 follow-up statements

226 
WWUS54 KEWX 151346
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
846 AM CDT Thu Apr 15 2021

TXC137-465-151430-
/O.CON.KEWX.SV.W.0035.000000T0000Z-210415T1430Z/
Edwards TX-Val Verde TX-
846 AM CDT Thu Apr 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 AM CDT
FOR SOUTHWESTERN EDWARDS AND EAST CENTRAL VAL VERDE COUNTIES...

At 845 AM CDT, a severe thunderstorm was located near Carta Valley,
or 14 miles southeast of Loma Alta, moving east 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...
Carta Valley and Kickapoo Cavern State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 2967 10079 2985 10078 2988 10038 2963 10040
TIME...MOT...LOC 1345Z 272DEG 14KT 2976 10063 

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

BF

117 
WWUS54 KEWX 151407
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
907 AM CDT Thu Apr 15 2021

TXC465-151416-
/O.CAN.KEWX.SV.W.0035.000000T0000Z-210415T1430Z/
Val Verde TX-
907 AM CDT Thu Apr 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL VAL VERDE COUNTY
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 300 PM CDT for
south central Texas.

LAT...LON 2970 10064 2986 10063 2988 10038 2963 10040
TIME...MOT...LOC 1406Z 272DEG 14KT 2976 10053 

$$

TXC137-151430-
/O.CON.KEWX.SV.W.0035.000000T0000Z-210415T1430Z/
Edwards TX-
907 AM CDT Thu Apr 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 AM CDT
FOR SOUTHWESTERN EDWARDS COUNTY...

At 906 AM CDT, a severe thunderstorm was located 9 miles east of
Carta Valley, or 18 miles southeast of Loma Alta, moving east 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.

This severe thunderstorm will remain over mainly rural areas of
southwestern Edwards County east of Carta Valley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 2970 10064 2986 10063 2988 10038 2963 10040
TIME...MOT...LOC 1406Z 272DEG 14KT 2976 10053 

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

BF

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 7:34 AM CDT	Special Weather Statement	EWX	Kinney	41 min
Apr 15, 8:12 AM CDT	Special Weather Statement	EWX	Edwards	48 min
Apr 15, 8:14 AM CDT	Special Weather Statement	EWX	Kinney	46 min
Apr 15, 8:40 AM CDT	Severe Thunderstorm Warning	EWX	Kinney	65 min
Apr 15, 8:55 AM CDT	Special Weather Statement	EWX	Edwards	50 min
Apr 15, 9:04 AM CDT	Severe Thunderstorm Warning	EWX	Edwards	24 min
Apr 15, 9:32 AM CDT	Severe Thunderstorm Warning	EWX	Edwards	17 min
Apr 15, 9:42 AM CDT	Severe Thunderstorm Warning	EWX	Kinney, Uvalde	63 min
Apr 15, 10:42 AM CDT	Severe Thunderstorm Warning	EWX	Uvalde	45 min
Apr 15, 12:15 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Llano	60 min
Apr 15, 1:07 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Llano, Travis	53 min
Apr 15, 1:52 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Williamson	36 min
Apr 15, 2:07 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Williamson	40 min
Apr 15, 2:57 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Llano	63 min
Apr 15, 3:21 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Williamson	54 min
Apr 15, 3:56 PM CDT	Severe Thunderstorm Warning	EWX	Travis, Williamson	49 min
Apr 15, 4:11 PM CDT	Special Weather Statement	EWX	Williamson	49 min
Apr 15, 4:36 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Lee, Travis, Williamson	54 min
Apr 15, 5:22 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Fayette, Lee	29 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.