Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 7, NWS Austin/San Antonio, TX

May 12, 2011Fayette County, Gonzales County, Lavaca County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at May 12, 2011, 11:32 AM CDT for Fayette County, Gonzales County, Lavaca County, Texas. It was in force for 28 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: May 12, 2011, 11:32 AM CDT (16:32 UTC)
Expired: May 12, 2011, 12:00 PM CDT
In force: 28 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon

Counties Fayette County, TX, Gonzales County, TX, Lavaca County, TX

The radar

The Austin/San Antonio radar (KEWX), 95 km from the middle of the area, began a volume at 16:32 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.

Issued	Product	Office	Lasted
May 12, 7:52 AM CDT	Severe Thunderstorm Watch	SPC	9 hr
May 12, 9:02 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 4.5 hours before the alert went out and 207 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: 2980 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 458 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 2.9
Supercell composite: 13.7

Open this sounding in Storm Lab

The text

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

831 
WFUS54 KEWX 121632
TOREWX
TXC149-177-285-121700-
/O.NEW.KEWX.TO.W.0007.110512T1632Z-110512T1700Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1132 AM CDT THU MAY 12 2011

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* TORNADO WARNING FOR...
  EXTREME SOUTH CENTRAL FAYETTE COUNTY...
  NORTHEASTERN GONZALES COUNTY...
  NORTHWESTERN LAVACA COUNTY...

* UNTIL NOON CDT.

* AT 1128 AM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES WEST OF
  MOULTON...MOVING EAST AT 40 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE MOULTON AND HALLETTSVILLE.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM CDT
THURSDAY AFTERNOON FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 2963 9687 2942 9692 2951 9733 2969 9729
TIME...MOT...LOC 1632Z 280DEG 35KT 2958 9720

$$

1 follow-up statement

155 
WWUS54 KEWX 121654
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1154 AM CDT THU MAY 12 2011

TXC149-177-285-121702-
/O.EXP.KEWX.TO.W.0007.000000T0000Z-110512T1700Z/
FAYETTE TX-GONZALES TX-LAVACA TX-
1154 AM CDT THU MAY 12 2011

...THE TORNADO WARNING FOR NORTHWESTERN LAVACA...NORTHEASTERN
GONZALES AND EXTREME SOUTH CENTRAL FAYETTE COUNTIES WILL EXPIRE AT
NOON CDT...

THE CIRCULATION THAT PROMPTED THE TORNADO WARNING NEAR MOULTON HAS 
WEAKENED.  THUS THE TORNADO WARNING WILL BE ALLOWED TO EXPIRE

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM CDT
THURSDAY AFTERNOON FOR SOUTH CENTRAL TEXAS.

LAT...LON 2963 9687 2942 9692 2951 9733 2969 9729
TIME...MOT...LOC 1652Z 280DEG 35KT 2955 9698

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 7:09 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Llano	51 min
May 11, 7:12 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Llano	63 min
May 11, 7:15 PM CDT	Areal Flood Advisory	EWX	Llano	105 min
May 11, 7:59 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Llano	46 min
May 11, 8:37 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Llano	23 min
May 11, 8:42 PM CDT	Areal Flood Advisory	EWX	Burnet	108 min
May 11, 8:56 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Llano, Travis, Williamson	49 min
May 11, 9:33 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Williamson	27 min
May 11, 9:53 PM CDT	Severe Thunderstorm Warning	EWX	Williamson	37 min
May 11, 10:19 PM CDT	Severe Thunderstorm Warning	EWX	Hays, Travis	41 min
May 11, 10:49 PM CDT	Severe Thunderstorm Warning	EWX	Hays, Travis	41 min
May 12, 3:28 AM CDT	Severe Thunderstorm Warning	EWX	Val Verde	47 min
May 12, 4:20 AM CDT	Severe Thunderstorm Warning	EWX	Val Verde	40 min
May 12, 5:00 AM CDT	Areal Flood Advisory	EWX	Val Verde	2 hr
May 12, 5:05 AM CDT	Severe Thunderstorm Warning	EWX	Val Verde	40 min
May 12, 5:24 AM CDT	Flash Flood Warning	EWX	Val Verde	3 hr
May 12, 5:46 AM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Val Verde	44 min
May 12, 6:30 AM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Uvalde	60 min
May 12, 6:40 AM CDT	Tornado Warning	EWX	Kinney	35 min
May 12, 6:59 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Edwards, Kerr, Kinney, Maverick, Medina and 4 more	61 min
May 12, 7:06 AM CDT	Tornado Warning	EWX	Uvalde	39 min
May 12, 7:45 AM CDT	Tornado Warning	EWX	Uvalde	45 min
May 12, 8:05 AM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Kinney, Maverick, Medina, Uvalde, Zavala	40 min
May 12, 8:26 AM CDT	Tornado Warning	EWX	Dimmit, Maverick, Zavala	49 min
May 12, 8:41 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Bexar, Comal, Dimmit, Frio, Kendall and 5 more	64 min
May 12, 8:49 AM CDT	River Flood Warning	EWX	Val Verde	11 hr
May 12, 8:53 AM CDT	Severe Thunderstorm Warning	EWX	Travis	37 min
May 12, 9:03 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar, Medina	42 min
May 12, 9:07 AM CDT	Tornado Warning	EWX	Medina	23 min
May 12, 9:11 AM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Comal, Gillespie, Hays, Kendall and 3 more	64 min
May 12, 9:20 AM CDT	Severe Thunderstorm Warning	EWX	Dimmit	40 min
May 12, 9:26 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Lee, Travis, Williamson	49 min
May 12, 9:36 AM CDT	Severe Thunderstorm Warning	EWX	Bexar, Comal, Guadalupe, Medina	54 min
May 12, 9:46 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar, Blanco, Caldwell, Comal, Frio and 5 more	59 min
May 12, 9:48 AM CDT	Severe Thunderstorm Warning	EWX	Fayette, Lee	29 min
May 12, 9:50 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Dimmit, Frio, Zavala	55 min
May 12, 10:02 AM CDT	Areal Flood Advisory	EWX	Atascosa, Bexar, Caldwell, Comal, Guadalupe, Hays and 4 more	118 min
May 12, 10:07 AM CDT	Severe Thunderstorm Warning	EWX	Dimmit	38 min
May 12, 10:15 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Hays, Lee, Travis, Williamson	45 min
May 12, 10:16 AM CDT	Flash Flood Warning	EWX	Bexar	104 min
May 12, 10:24 AM CDT	Flash Flood Warning	EWX	Caldwell, Hays, Travis, Williamson	3 hr
May 12, 10:37 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bastrop, Caldwell, DeWitt, Fayette, Gonzales and 4 more	53 min
May 12, 10:58 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Fayette, Gonzales, Lavaca, Lee and 1 more	47 min
May 12, 11:28 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bastrop, Caldwell, DeWitt, Fayette, Gonzales and 3 more	47 min

Nearby

Tornado Warnings in Texas, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.