Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 2, NWS Austin/San Antonio, TX

April 12, 2015Val Verde County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 12, 2015, 5:49 PM CDT for Val Verde County, Texas. It was in force for 56 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 12, 2015, 5:49 PM CDT (22:49 UTC)
Expired
Apr 12, 2015, 6:45 PM CDT
In force
56 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

County Val Verde County, TX

What was reported inside it

TimeReportWhereRemark
Apr 12, 6:42 PM CDTTSTM WND GST 44Del Rio, TXDEL RIO INTERNATIONAL AIRPORT ASOS REPORTED A WIND GUST OF 39 KNOTS.

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 (KDLF), launched 12:00Z, 10.8 hours before the alert went out and 62 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, Del Rio, TX at 12:00Z on 2015-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1227 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 12:00Z on 2015-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.1939587897Sfc1 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
1227 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
596 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.9

Open this sounding in Storm Lab

The text

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

910 
WUUS54 KEWX 122249
SVREWX
TXC465-122345-
/O.NEW.KEWX.SV.W.0002.150412T2249Z-150412T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
549 PM CDT SUN APR 12 2015

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  VAL VERDE COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL 645 PM CDT

* AT 548 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR PANDALE TO 30 MILES SOUTHWEST OF BOX
  CANYON-AMISTAD...MOVING EAST AT 25 MPH.

  HAZARD...70 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT CONSIDERABLE 
           TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO MOBILE 
           HOMES...ROOFS AND OUTBUILDINGS. 

* LOCATIONS IMPACTED INCLUDE...
  DEL RIO...LANGTRY...JUNO...COMSTOCK...OSMAN...PANDALE...SHUMLA...
  LAKE VIEW...SEMINOLE CANYON STATE PARK...CIENEGAS TERRACE...AMISTAD
  VILLAGE...BOX CANYON-AMISTAD...VAL VERDE PARK...PAFFORD CROSSING...
  ROUGH CANYON REC AREA...DEVILS SHORES...BAKERS CROSSING...HACKBERRY
  CROSSING AND DEVILS RIVER STATE NATURAL AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3027 10169 3026 10081 2935 10084 2938 10101
      2946 10106 2952 10118 2952 10125 2962 10125
      2963 10126 2957 10129 2965 10130 2965 10136
      2975 10142 2977 10140 2975 10144 2979 10147
      2976 10154 2981 10155 2977 10158 2976 10164
TIME...MOT...LOC 2248Z 268DEG 23KT 3020 10162 2930 10160 

HAIL...1.00IN
WIND...70MPH
 
$$

LENZ
1 follow-up statement
080 
WWUS54 KEWX 122316
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
616 PM CDT SUN APR 12 2015

TXC465-122345-
/O.CON.KEWX.SV.W.0002.000000T0000Z-150412T2345Z/
VAL VERDE TX-
616 PM CDT SUN APR 12 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR VAL VERDE COUNTY...

AT 615 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 7 MILES EAST OF PANDALE TO 21 MILES SOUTHWEST OF BOX
CANYON-AMISTAD...MOVING EAST AT 25 MPH.

HAZARD...70 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT CONSIDERABLE 
         TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO MOBILE 
         HOMES...ROOFS AND OUTBUILDINGS. 

LOCATIONS IMPACTED INCLUDE...
DEL RIO...LANGTRY...JUNO...COMSTOCK...OSMAN...PANDALE...SHUMLA...LAKE
VIEW...SEMINOLE CANYON STATE PARK...CIENEGAS TERRACE...AMISTAD
VILLAGE...BOX CANYON-AMISTAD...VAL VERDE PARK...PAFFORD CROSSING...
ROUGH CANYON REC AREA...DEVILS SHORES...BAKERS CROSSING...HACKBERRY
CROSSING AND DEVILS RIVER STATE NATURAL AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3027 10169 3026 10081 2935 10084 2938 10101
      2946 10106 2952 10118 2952 10125 2962 10125
      2963 10126 2957 10129 2965 10130 2965 10136
      2975 10142 2977 10140 2975 10144 2979 10147
      2976 10154 2981 10155 2977 10158 2976 10164
TIME...MOT...LOC 2315Z 268DEG 23KT 3021 10143 2931 10141 

HAIL...1.00IN
WIND...70MPH
 
$$

LENZ

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 11, 7:36 PM CDTSpecial Weather StatementEWXDimmit54 min
Apr 11, 7:42 PM CDTAreal Flood AdvisoryEWXDimmit63 min
Apr 12, 9:09 AM CDTAreal Flood AdvisoryEWXWilson2 hr
Apr 12, 6:46 PM CDTSevere Thunderstorm WarningEWXEdwards, Kinney, Val Verde59 min
Apr 12, 6:56 PM CDTSevere Thunderstorm WarningEWXDimmit, Kinney, Maverick, Zavala64 min

Nearby

Severe Thunderstorm Warnings in Texas, 2015Every severe thunderstorm warning in 2015

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.