Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 47, NWS Austin/San Antonio, TX

March 29, 2012Wilson County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 29, 2012, 12:52 AM CDT for Wilson County, Texas. It was in force for 38 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
Mar 29, 2012, 12:52 AM CDT (05:52 UTC)
Expired
Mar 29, 2012, 1:30 AM CDT
In force
38 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon

County Wilson County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 5.9 hours before the alert went out and 178 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, Corpus Christi, TX at 00:00Z on 2012-03-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 801 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, Corpus Christi, TX at 00:00Z on 2012-03-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 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
801 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
986 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

917 
WUUS54 KEWX 290552
SVREWX
TXC493-290630-
/O.NEW.KEWX.SV.W.0047.120329T0552Z-120329T0630Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1252 AM CDT THU MAR 29 2012

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 130 AM CDT.

* AT 1248 AM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE         
  THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL AND WINDS UP   
  TO 60 MPH.  THIS STORM WAS LOCATED NEAR FLORESVILLE...AND MOVING   
  NORTHEAST AT 10 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE SUTHERLAND SPRINGS AND
  STOCKDALE.

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 2933 9800 2914 9786 2903 9815 2917 9827
TIME...MOT...LOC 0551Z 235DEG 8KT 2915 9812

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 28, 7:30 PM CDTFlash Flood WarningEWXAtascosa, DeWitt, Karnes, Wilson3 hr
Mar 29, 1:16 AM CDTAreal Flood AdvisoryEWXWilson104 min
Mar 29, 1:33 AM CDTSevere Thunderstorm WarningEWXBexar, Guadalupe21 min
Mar 29, 8:55 AM CDTAreal Flood AdvisoryEWXCaldwell4 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2012Every 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; the sounding from the Mesonet's radiosonde archive.