Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 90, NWS Austin/San Antonio, TX

May 14, 2012Val Verde County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 14, 2012, 3:08 AM CDT for Val Verde County, Texas. It was in force for 67 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: May 14, 2012, 3:08 AM CDT (08:08 UTC)
Expired: May 14, 2012, 4:15 AM CDT
In force: 67 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon

County Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 116 km from the middle of the area, began a volume at 08:09 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
May 14, 3:55 AM CDT	TSTM WND DMG	Ene Seminole Canyon Sta, TX	FOUR INCH DIAMETER BRANCH OF A HEALTHY PALO VERDE TREE WAS TORN OFF BY WINDS

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

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 8.1 hours before the alert went out and 64 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: 34 J/kg
Mixed-layer CIN: -193 J/kg
Mixed-layer LCL: 2008 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -57 m²/s²
0-3 km storm-relative helicity: 16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

057 
WUUS54 KEWX 140808
SVREWX
TXC465-140915-
/O.NEW.KEWX.SV.W.0090.120514T0808Z-120514T0915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
308 AM CDT MON MAY 14 2012

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  VAL VERDE COUNTY...

* UNTIL 415 AM CDT.

* AT 305 AM CDT...NWS METEOROLOGISTS HAVE DETECTED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF
  70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 24
  MILES NORTHEAST OF OSMAN TO 14 MILES NORTHEAST OF OSMAN TO 12 MILES
  SOUTHWEST OF OSMAN TO 31 MILES SOUTHWEST OF LANGTRY...OR ALONG A
  LINE EXTENDING FROM 18 MILES WEST OF JUNO TO 15 MILES NORTHEAST OF
  LANGTRY TO 14 MILES WEST OF LANGTRY TO 31 MILES SOUTHWEST OF       
  LANGTRY...AND MOVING SOUTHEAST AT 40 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE SHUMLA...SEMINOLE CANYON
  STATE PARK...COMSTOCK AND AMISTAD VILLAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3008 10156 3029 10145 2974 10070 2950 10080
      2936 10099 2945 10108 2952 10127 2959 10126
      2957 10130 2964 10131 2964 10136 2977 10147
      2975 10154 2979 10155 2974 10165 2978 10177
      2993 10177
TIME...MOT...LOC 0808Z 311DEG 39KT 3014 10139 3000 10144
          2973 10176 2947 10190

$$

1 follow-up statement

382 
WWUS54 KEWX 140845
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
345 AM CDT MON MAY 14 2012

TXC465-140915-
/O.CON.KEWX.SV.W.0090.000000T0000Z-120514T0915Z/
VAL VERDE TX-
345 AM CDT MON MAY 14 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 AM CDT
FOR VAL VERDE COUNTY...

AT 341 AM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM BAKERS
CROSSING TO SEMINOLE CANYON STATE PARK TO 9 MILES SOUTHWEST OF
SEMINOLE CANYON STATE PARK TO 35 MILES SOUTHWEST OF SEMINOLE CANYON
STATE PARK...OR ALONG A LINE EXTENDING FROM 17 MILES SOUTH OF JUNO TO
11 MILES WEST OF COMSTOCK TO 15 MILES SOUTHEAST OF LANGTRY TO 40
MILES SOUTHWEST OF COMSTOCK...MOVING SOUTHEAST AT 40 MPH.

SOME LOCATIONS IN THE WARNING AREA INCLUDE PAFFORD CROSSING...ROUGH
CANYON REC AREA...DEVILS SHORES AND AMISTAD VILLAGE.

LAT...LON 2957 10130 2964 10131 2964 10136 2972 10143
      2975 10139 3003 10121 2968 10075 2940 10094
      2939 10095 2936 10099 2945 10108 2952 10127
      2959 10126
TIME...MOT...LOC 0845Z 311DEG 39KT 2990 10118 2969 10131
          2959 10142 2921 10155

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 2:12 AM CDT	Severe Thunderstorm Warning	EWX	Val Verde	63 min
May 14, 11:41 AM CDT	Flash Flood Watch	EWX	Bandera, Dimmit, Edwards, Frio, Kerr, Kinney and 6 more	12 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2012 Every severe thunderstorm warning in 2012

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.