Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 13, NWS Corpus Christi, TX

May 12, 2011La Salle County, Webb County, Texas

NWS Corpus Christi, TX issued this severe thunderstorm warning at May 12, 2011, 9:27 AM CDT for La Salle County, Webb County, Texas. It was in force for 63 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, 9:27 AM CDT (14:27 UTC)
Expired: May 12, 2011, 10:30 AM CDT
In force: 63 min
Issued by: NWS Corpus Christi, TX
Area: Storm-based polygon

Counties La Salle County, TX, Webb County, TX

The radar

The Laughlin AFB radar (KDFX), 137 km from the middle of the area, began a volume at 14:28 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.

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

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 2.5 hours before the alert went out and 210 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.

236 
WUUS54 KCRP 121427
SVRCRP
TXC283-479-121530-
/O.NEW.KCRP.SV.W.0013.110512T1427Z-110512T1530Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
927 AM CDT THU MAY 12 2011

THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN LA SALLE COUNTY IN SOUTH TEXAS
  NORTHWESTERN WEBB COUNTY IN SOUTH TEXAS

* UNTIL 1030 AM CDT

* AT 923 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 20 MILES NORTH OF MILLETT TO 36
  MILES NORTHWEST OF LA ESPERANZA RANCH AIRPORT...OR ALONG A LINE
  EXTENDING FROM PEARSALL TO 20 MILES SOUTHEAST OF EL INDIO...AND
  MOVING SOUTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WOODWARD...
  MILLETT...
  COTULLA...
  ARTESIA WELLS...
  GARDENDALE...
  LOS ANGELES...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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 300 PM CDT
THURSDAY AFTERNOON FOR CENTRAL TEXAS.

&&

LAT...LON 2821 9940 2864 9939 2865 9892 2863 9886
      2815 9924 2792 9977 2821 10000
TIME...MOT...LOC 1425Z 325DEG 18KT 2886 9916 2830 10009

$$

MLG/77

1 follow-up statement

984 
WWUS54 KCRP 121500
SVSCRP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1000 AM CDT THU MAY 12 2011

TXC283-479-121530-
/O.CON.KCRP.SV.W.0013.000000T0000Z-110512T1530Z/
LA SALLE-WEBB-
1000 AM CDT THU MAY 12 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 AM CDT
FOR NORTHWESTERN WEBB AND WESTERN LA SALLE COUNTIES...

AT 954 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF
BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE 
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 8 MILES NORTHEAST OF 
DILLEY TO NEAR CHUPADERA RANCH AIRPORT IN NORTHWESTERN WEBB 
COUNTY...MOVING SOUTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MILLET...
  GARDENDALE...
  COTULLA...
  LOS ANGELES...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

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

&&

LAT...LON 2821 9940 2864 9939 2865 9892 2863 9886
      2815 9924 2792 9977 2821 10000
TIME...MOT...LOC 1455Z 325DEG 18KT 2874 9906 2818 9999

$$

TE

The office that day

Everything else NWS Corpus Christi, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 12, 10:29 AM CDT	Severe Thunderstorm Warning	CRP	La Salle, McMullen, Webb	61 min
May 12, 11:30 AM CDT	Severe Thunderstorm Warning	CRP	La Salle, Webb	60 min
May 12, 12:09 PM CDT	Flash Flood Warning	CRP	Webb	111 min
May 12, 12:29 PM CDT	Severe Thunderstorm Warning	CRP	Webb	41 min
May 12, 1:02 PM CDT	Severe Thunderstorm Warning	CRP	Aransas, Bee, Nueces, Refugio, San Patricio	58 min
May 12, 1:05 PM CDT	Special Marine Warning	CRP		3 hr
May 12, 1:23 PM CDT	Severe Thunderstorm Warning	CRP	Aransas, Calhoun, Refugio, Victoria	52 min
May 12, 1:49 PM CDT	Special Marine Warning	CRP		3 hr
May 12, 2:35 PM CDT	Areal Flood Advisory	CRP	Nueces	115 min
May 12, 3:08 PM CDT	Areal Flood Advisory	CRP	Kleberg	112 min
May 12, 3:22 PM CDT	Severe Thunderstorm Warning	CRP	Kleberg	38 min
May 12, 3:54 PM CDT	Special Marine Warning	CRP		2 hr
May 12, 3:57 PM CDT	Severe Thunderstorm Warning	CRP	Kleberg	37 min
May 12, 4:35 PM CDT	Special Marine Warning	CRP		115 min
May 12, 5:48 PM CDT	Special Marine Warning	CRP		57 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.