Alert archive / Texas / Special Weather Statements in 2012

Special Weather Statement, NWS Austin/San Antonio, TX

November 4, 2012Val Verde County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Nov 4, 2012, 1:24 AM CST for Val Verde County, Texas. It was in force for 66 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: Nov 4, 2012, 1:24 AM CST (07:24 UTC)
Expired: Nov 4, 2012, 2:30 AM CST
In force: 66 min
Issued by: NWS Austin/San Antonio, TX

County Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 116 km from the middle of the area, began a volume at 07:27 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

Del Rio, TX (KDRT), launched 00:00Z, 7.4 hours before the alert went out and 63 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: 980 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 1882 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Austin/San Antonio, TX wrote its last area forecast discussion before this special weather statement went out at Nov 4, 12:03 AM CDT, 2 hours 21 minutes earlier.

Area forecast discussion, Nov 4, 12:03 AM CDT, 2 hours 21 minutes before

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Hazardous weather outlook, Nov 3, 4:45 PM CDT, 9 hours 39 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
445 PM CDT SAT NOV 3 2012

TXZ171>173-183>194-202>209-217>225-228-042145-
LLANO-BURNET-WILLIAMSON-VAL VERDE-EDWARDS-REAL-KERR-BANDERA-
GILLESPIE-KENDALL-BLANCO-HAYS-TRAVIS-BASTROP-LEE-KINNEY-UVALDE-
MEDINA-BEXAR-COMAL-GUADALUPE-CALDWELL-FAYETTE-MAVERICK-ZAVALA-
FRIO-ATASCOSA-WILSON-KARNES-GONZALES-DE WITT-LAVACA-DIMMIT-
445 PM CDT SAT NOV 3 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TONIGHT...

A FEW STRONG THUNDERSTORMS COULD AFFECT PORTIONS OF SOUTH CENTRAL
TEXAS THROUGH TONIGHT...ESPECIALLY ALONG AND NORTH OF A DEL RIO TO
BURNET LINE. THE MAIN CONCERN WITH THE STRONGER STORMS WILL BE
SMALL HAIL AND GUSTY WINDS. IN ADDITION... OCCASIONAL LIGHTNING
STRIKES AND BRIEF HEAVY RAINFALL WILL ACCOMPANY THE STRONGER
THUNDERSTORMS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

In the hours before

Special weather statement, Nov 3, 8:38 PM CDT, 5 hours 46 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
838 PM CDT SAT NOV 3 2012

TXZ183-040230-
VAL VERDE-
838 PM CDT SAT NOV 3 2012

...SIGNIFICANT WEATHER ADVISORY FOR VAL VERDE COUNTY UNTIL 930 PM
CDT...

AT 836 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 6 MILES NORTHWEST OF PANDALE...OR 30 MILES NORTH
OF LANGTRY...MOVING SOUTHEAST AT 20 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  PANDALE...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3030 10175 3029 10124 3028 10124 3009 10141
      3007 10176 3025 10177
TIME...MOT...LOC 0138Z 295DEG 14KT 3024 10162

Special weather statement, Nov 3, 10:20 PM CDT, 4 hours 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1020 PM CDT SAT NOV 3 2012

TXZ183-040400-
VAL VERDE-
1020 PM CDT SAT NOV 3 2012

...SIGNIFICANT WEATHER ADVISORY FOR VAL VERDE COUNTY UNTIL 1100 PM
CDT...

AT 1014 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 11 MILES NORTHEAST
OF JUNO TO 14 MILES SOUTH OF JUNO...AND MOVING EAST AT 15 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
  DEVILS RIVER STATE NATURAL AREA...
  FARM TO MARKET ROAD 189...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER
CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED
ROADWAYS.

LAT...LON 3028 10071 2980 10081 2984 10124 3027 10108
TIME...MOT...LOC 0318Z 273DEG 12KT 3023 10095 3008 10098
          2994 10107

Special weather statement, Nov 3, 10:41 PM CDT, 3 hours 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1041 PM CDT SAT NOV 3 2012

TXZ183-184-202-040430-
EDWARDS-KINNEY-VAL VERDE-
1041 PM CDT SAT NOV 3 2012

...SIGNIFICANT WEATHER ADVISORY FOR VAL VERDE...NORTHWESTERN KINNEY
AND WESTERN EDWARDS COUNTIES UNTIL 1130 PM CDT...

AT 1037 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 17 MILES NORTH OF
FLOUR MILLS TO 6 MILES NORTH OF DEL RIO...AND MOVING EAST AT 25 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN.

LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
  LOMA ALTA...
  LAUGHLIN AFB...
  FLOUR MILLS...
  CARTA VALLEY...
  AMANDA...
  STANDART...
  VINEGARONE...
  KICKAPOO CAVERN STATE PARK...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER
CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED
ROADWAYS.

LAT...LON 3030 10083 3029 10029 2925 10052 2934 10098
      2937 10101
TIME...MOT...LOC 0341Z 278DEG 20KT 3026 10072 2946 10086

Special weather statement, Nov 3, 11:59 PM CDT, 2 hours 25 minutes before

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Special weather statement, Nov 4, 1:24 AM CST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 3, 7:49 PM CDT	Special Weather Statement	EWX	Lavaca	26 min
Nov 3, 8:38 PM CDT	Special Weather Statement	EWX	Val Verde	52 min
Nov 3, 10:20 PM CDT	Special Weather Statement	EWX	Val Verde	40 min
Nov 3, 10:41 PM CDT	Special Weather Statement	EWX	Edwards	49 min
Nov 3, 10:51 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Val Verde	54 min
Nov 3, 11:59 PM CDT	Special Weather Statement	EWX	Kinney	46 min
Nov 4, 2:51 AM CST	Areal Flood Advisory	EWX	Bexar	2 hr
Nov 4, 3:00 AM CST	Special Weather Statement	EWX	Wilson	30 min

Nearby

Special Weather Statements in Texas, 2012 Every special weather statement 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.