Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 65, NWS Austin/San Antonio, TX

May 12, 201110 counties in Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 12, 2011, 10:37 AM CDT for 10 counties in Texas. It was in force for 53 min. 2 reports 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: May 12, 2011, 10:37 AM CDT (15:37 UTC)
Expired: May 12, 2011, 11:30 AM CDT
In force: 53 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon

Counties Atascosa County, TX, Bastrop County, TX, Caldwell County, TX, DeWitt County, TX, Fayette County, TX, Gonzales County, TX, Guadalupe County, TX, Karnes County, TX, Lavaca County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 92 km from the middle of the area, began a volume at 15:36 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.

What was reported inside it

Time	Report	Where	Remark
May 12, 11:00 AM CDT	HAIL 0.25	2 W Smiley, TX	PEA SIZE HAIL IN SMILEY.
May 12, 11:20 AM CDT	TSTM WND DMG	1 S Gonzales, TX	TREES DOWN ON THE GOLF COURSE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 3.6 hours before the alert went out and 138 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.

339 
WUUS54 KEWX 121537
SVREWX
TXC013-021-055-123-149-177-187-255-285-493-121630-
/O.NEW.KEWX.SV.W.0065.110512T1537Z-110512T1630Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1037 AM CDT THU MAY 12 2011

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN ATASCOSA COUNTY...
  SOUTH CENTRAL BASTROP COUNTY...
  EASTERN CALDWELL COUNTY...
  DEWITT COUNTY...
  SOUTHWESTERN FAYETTE COUNTY...
  GONZALES COUNTY...
  SOUTHEASTERN GUADALUPE COUNTY...
  KARNES COUNTY...
  NORTHWESTERN LAVACA COUNTY...
  EASTERN WILSON COUNTY...

* UNTIL 1130 AM CDT.

* AT 1032 AM CDT...NWS METEOROLOGISTS HAVE DETECTED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF     
  60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 9   
  MILES NORTH OF LOCKHART TO CAMPBELLTON...AND MOVING SOUTHEAST AT   
  50 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE STOCKDALE...FALLS CITY...
  KOSCIUSKO...PANDORA...CESTOHOWA...PALMETO...NIXON...GILLETT...
  KARNES CITY...SMILEY...KENEDY...GONZALES...WAELDER...RUNGE...
  WESTHOFF...NORDHEIM...CHEAPSIDE...YORKTOWN...FLATONIA...HOCHHEIM...
  MOULTON...SHINER...CUERO AND YOAKUM.

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 2886 9731 2892 9743 2867 9777 2866 9784
      2871 9792 2868 9801 2877 9811 2863 9830
      2863 9844 2998 9759 2965 9687
TIME...MOT...LOC 1536Z 302DEG 43KT 2997 9759 2873 9825

$$

1 follow-up statement

517 
WWUS54 KEWX 121620
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1120 AM CDT THU MAY 12 2011

TXC013-021-055-123-149-177-187-255-285-493-121630-
/O.CON.KEWX.SV.W.0065.000000T0000Z-110512T1630Z/
BASTROP TX-FAYETTE TX-CALDWELL TX-GUADALUPE TX-GONZALES TX-LAVACA TX-
WILSON TX-DEWITT TX-ATASCOSA TX-KARNES TX-
1120 AM CDT THU MAY 12 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT
FOR KARNES...SOUTHEASTERN ATASCOSA...DEWITT...EASTERN WILSON...
NORTHWESTERN LAVACA...GONZALES...SOUTHEASTERN GUADALUPE...
SOUTHEASTERN CALDWELL...SOUTHWESTERN FAYETTE AND EXTREME SOUTH
CENTRAL BASTROP COUNTIES...

AT 1118 AM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG 
A LINE EXTENDING FROM FLATONIA TO 11 MILES SOUTHWEST OF  
KENEDY...MOVING EAST AT 50 MPH.

SOME LOCATIONS IN THE WARNING AREA INCLUDE HAMON...SAMPLE...NICKLE...
GARFIELD...NEW DAVY...MOULTON...CHEAPSIDE...GLAZE CITY...WESTHOFF...
GRUENAU...ENGLE...RUNGE...COTTON PATCH...DREYER...CHOATE...
MEYERSVILLE...ARNECKVILLE...EDGAR...CONCRETE...BRESLAU...KOMENSKY...
WITTING...HENKHAUS...WIED...MOUNT OLIVE...SWEET HOME...WORTHING...
MORAVIA...YORKTOWN...NORDHEIM...HOCHHEIM...CUERO...YOAKUM AND SHINER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2868 9839 2990 9757 2965 9687 2886 9731
      2892 9743 2867 9777 2866 9784 2871 9792
      2868 9801 2877 9811 2863 9830
TIME...MOT...LOC 1620Z 271DEG 44KT 2972 9712 2874 9799

$$

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, 10:58 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
May 12, 11:32 AM CDT	Tornado Warning	EWX	Fayette, Gonzales, Lavaca	28 min

Nearby

Severe Thunderstorm Warnings in Texas, 2011 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.