Alert archive / Texas / Tornado Warnings in 2012

Tornado Warning 24, NWS Austin/San Antonio, TX

September 13, 2012Frio County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at Sep 13, 2012, 9:22 PM CDT for Frio County, Texas. It was in force for 23 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
Sep 13, 2012, 9:22 PM CDT (02:22 UTC)
Expired
Sep 13, 2012, 9:45 PM CDT
In force
23 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon

County Frio County, TX

The radar

The Laughlin AFB radar (KDFX), 110 km from the middle of the area, began a volume at 02:22 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

Corpus Christi, TX (KCRP), launched 00:00Z, 2.4 hours before the alert went out and 225 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 2012-09-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 424 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, Corpus Christi, TX at 00:00Z on 2012-09-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 square meters per square second.1939Sfc1 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
424 J/kg
Mixed-layer CIN
-131 J/kg
Mixed-layer LCL
1564 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
-10 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.

395 
WFUS54 KEWX 140222
TOREWX
TXC163-140245-
/O.NEW.KEWX.TO.W.0024.120914T0222Z-120914T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
922 PM CDT THU SEP 13 2012

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* TORNADO WARNING FOR...
  WEST CENTRAL FRIO COUNTY...

* UNTIL 945 PM CDT.

* AT 917 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR DIVOT...OR ABOUT
  10 MILES NORTHWEST OF DILLEY...MOVING NORTHEAST AT 5 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE BLUFF.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN A MOBILE HOME OR VEHICLE...GET OUT AND GO TO A STURDY
SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH
OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 2890 9930 2884 9916 2874 9926 2877 9933
TIME...MOT...LOC 0221Z 209DEG 5KT 2879 9927

$$
2 follow-up statements
531 
WWUS54 KEWX 140232
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
932 PM CDT THU SEP 13 2012

TXC163-140245-
/O.CON.KEWX.TO.W.0024.000000T0000Z-120914T0245Z/
FRIO TX-
932 PM CDT THU SEP 13 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR WEST
CENTRAL FRIO COUNTY...

AT 927 PM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A POSSIBLE 
TORNADO. THIS TORNADO WAS LOCATED NEAR BLUFF...OR 11 MILES NORTHWEST 
OF DILLEY...MOVING NORTHEAST AT 5 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF A
BUILDING IN AN INTERIOR HALLWAY...BATHROOM...OR CLOSET. COVER
YOURSELF WITH BLANKETS...PILLOWS OR EVEN A MATTRESS FOR BETTER
PROTECTION.

&&

LAT...LON 2878 9925 2879 9932 2890 9930 2884 9916
TIME...MOT...LOC 0232Z 209DEG 5KT 2881 9926

$$
218 
WWUS54 KEWX 140241
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
941 PM CDT THU SEP 13 2012

TXC163-140250-
/O.EXP.KEWX.TO.W.0024.000000T0000Z-120914T0245Z/
FRIO TX-
941 PM CDT THU SEP 13 2012

...THE TORNADO WARNING FOR WEST CENTRAL FRIO COUNTY WILL EXPIRE AT
945 PM CDT...

THE POSSIBLE TORNADIC STORM NEAR DIVOT HAS WEAKENED AND THE WARNING 
WILL BE ALLOWED TO EXPIRE.  

LAT...LON 2878 9925 2879 9932 2890 9930 2884 9916
TIME...MOT...LOC 0240Z 209DEG 5KT 2882 9925

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 13, 7:05 PM CDTAreal Flood AdvisoryEWXBlanco, Gillespie, Llano3 hr
Sep 13, 7:28 PM CDTAreal Flood AdvisoryEWXBandera, Medina, Uvalde3 hr
Sep 13, 8:04 PM CDTAreal Flood AdvisoryEWXDimmit, Maverick, Zavala116 min
Sep 13, 9:53 PM CDTAreal Flood AdvisoryEWXBexar, Comal, Kendall2 hr
Sep 13, 10:01 PM CDTAreal Flood AdvisoryEWXFrio, Medina119 min
Sep 13, 10:21 PM CDTSpecial Weather StatementEWXFrio39 min
Sep 13, 10:29 PM CDTFlash Flood WarningEWXBexar, Comal, Guadalupe3 hr
Sep 13, 10:44 PM CDTFlash Flood WarningEWXBlanco, Gillespie, Kendall3 hr
Sep 14, 12:52 AM CDTAreal Flood AdvisoryEWXMaverick2 hr
Sep 14, 1:40 AM CDTAreal Flood AdvisoryEWXBexar, Guadalupe, Wilson110 min
Sep 14, 2:37 AM CDTAreal Flood AdvisoryEWXBexar, Comal, Gonzales, Guadalupe113 min

Nearby

Tornado Warnings in Texas, 2012Every tornado warning in 2012Tornadoes 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; radar from the NEXRAD Level II archive.