Alert archive / Texas / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 49, NWS Austin/San Antonio, TX

April 21, 2014Kendall County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 21, 2014, 9:28 PM CDT for Kendall County, Texas. It was in force for 32 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 21, 2014, 9:28 PM CDT (02:28 UTC)
Expired
Apr 21, 2014, 10:00 PM CDT
In force
32 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon

County Kendall County, TX

The radar

The Austin/San Antonio radar (KEWX), 71 km from the middle of the area, began a volume at 02:28 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.

IssuedProductOfficeLasted
Apr 21, 2:52 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Del Rio, TX (KDLF), launched 00:00Z, 2.5 hours before the alert went out and 212 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 00:00Z on 2014-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1322 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2014-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.193958Sfc1 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
1322 J/kg
Mixed-layer CIN
-165 J/kg
Mixed-layer LCL
1604 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
54 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

002 
WUUS54 KEWX 220228
SVREWX
TXC259-220300-
/O.NEW.KEWX.SV.W.0049.140422T0228Z-140422T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
928 PM CDT MON APR 21 2014

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL KENDALL COUNTY...

* UNTIL 1000 PM CDT.

* AT 923 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM
  WAS LOCATED NEAR WARING...OR 7 MILES EAST OF COMFORT...AND MOVING
  SOUTHEAST AT 15 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE SISTERDALE...WELFARE...NELSON
  CITY...KREUTZBERG...WALNUT GROVE...BOERNE AND BERGHEIM.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
MONDAY EVENING FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 2982 9857 2977 9876 2980 9891 3007 9892
      3007 9867
TIME...MOT...LOC 0229Z 330DEG 11KT 2996 9878

$$
1 follow-up statement
239 
WWUS54 KEWX 220251
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
951 PM CDT MON APR 21 2014

TXC259-220300-
/O.CAN.KEWX.SV.W.0049.000000T0000Z-140422T0300Z/
KENDALL TX-
951 PM CDT MON APR 21 2014

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL KENDALL COUNTY IS
CANCELLED...

THE STORM IS RAPIDLY WEAKENING. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
MONDAY EVENING FOR SOUTH CENTRAL TEXAS.

LAT...LON 2982 9857 2977 9876 2980 9891 3007 9892
      3007 9867
TIME...MOT...LOC 0250Z 330DEG 11KT 2990 9874

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 21, 7:08 PM CDTSevere Thunderstorm WarningEWXBlanco, Gillespie, Kendall52 min
Apr 21, 7:31 PM CDTSevere Thunderstorm WarningEWXGillespie, Kendall, Kerr59 min
Apr 21, 8:09 PM CDTSpecial Weather StatementEWXKendall36 min
Apr 21, 8:29 PM CDTSevere Thunderstorm WarningEWXGillespie, Kendall, Kerr61 min
Apr 21, 9:02 PM CDTSpecial Weather StatementEWXGillespie28 min
Apr 21, 9:18 PM CDTSpecial Weather StatementEWXKerr27 min
Apr 21, 9:26 PM CDTSevere Thunderstorm WarningEWXKerr34 min
Apr 21, 9:56 PM CDTSevere Thunderstorm WarningEWXKerr64 min
Apr 21, 10:06 PM CDTSpecial Weather StatementEWXKimble39 min
Apr 21, 10:36 PM CDTSevere Thunderstorm WarningEWXKerr39 min
Apr 21, 10:59 PM CDTSpecial Weather StatementEWXKerr46 min
Apr 21, 11:41 PM CDTSpecial Weather StatementEWXGillespie49 min
Apr 21, 11:52 PM CDTSpecial Weather StatementEWXEdwards38 min
Apr 22, 12:27 AM CDTSpecial Weather StatementEWXEdwards48 min

Nearby

Severe Thunderstorm Warnings in Texas, 2014Every severe thunderstorm warning in 2014

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.