Alert archive / Texas / Wind Advisories in 2011

Wind Advisory 6, NWS Austin/San Antonio, TX

April 10, 201118 counties in Texas

NWS Austin/San Antonio, TX issued this wind advisory at Apr 10, 2011, 11:21 AM CDT for 18 counties in Texas. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Apr 10, 2011, 11:21 AM CDT (16:21 UTC)
Expired
Apr 10, 2011, 9:23 PM CDT
In force
10 hr
Issued by
NWS Austin/San Antonio, TX

Counties Atascosa County, TX, Bastrop County, TX, Bexar County, TX, Blanco County, TX, Burnet County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Lavaca County, TX, Lee County, TX, Travis County, TX, Williamson County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 26 km from the middle of the area, began a volume at 16:20 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 12:00Z, 4.4 hours before the alert went out and 231 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 12:00Z on 2011-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 229 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 12:00Z on 2011-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 square meters per square second.193958Sfc1 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
229 J/kg
Mixed-layer CIN
-851 J/kg
Mixed-layer LCL
723 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
84 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.

054 
WWUS74 KEWX 101621
NPWEWX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1121 AM CDT SUN APR 10 2011

...A WIND ADVISORY IS IN EFFECT UNTIL 10 PM CDT TODAY FOR AREAS
ALONG AND EAST OF HIGHWAY 281...

.A TIGHTENING SURFACE PRESSURE GRADIENT COMBINED WITH HIGHER
WINDS ALOFT MIXING TO THE SURFACE WILL PRODUCE WINDS 20 TO 30 MPH
WITH GUST OVER 35 MPH. WINDS WILL DECREASE BELOW ADVISORY VALUES
DURING THE LATE EVENING HOURS.

TXZ172-173-190>194-205>209-220>225-110300-
/O.NEW.KEWX.WI.Y.0006.110410T1621Z-110411T0300Z/
BURNET-WILLIAMSON-BLANCO-HAYS-TRAVIS-BASTROP-LEE-BEXAR-COMAL-
GUADALUPE-CALDWELL-FAYETTE-ATASCOSA-WILSON-KARNES-GONZALES-
DE WITT-LAVACA-
INCLUDING THE CITIES OF...BURNET...GEORGETOWN...BLANCO...
SAN MARCOS...AUSTIN...BASTROP...GIDDINGS...SAN ANTONIO...
NEW BRAUNFELS...SEGUIN...LOCKHART...LA GRANGE...PLEASANTON...
FLORESVILLE...KARNES CITY...GONZALES...CUERO...HALLETTSVILLE
1121 AM CDT SUN APR 10 2011

...WIND ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING...

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
WIND ADVISORY...WHICH IS IN EFFECT UNTIL 10 PM CDT THIS EVENING. 

A TIGHTENING SURFACE PRESSURE GRADIENT COMBINED WITH HIGHER WINDS
ALOFT MIXING TO THE SURFACE WILL PRODUCE WINDS 20 TO 30 MPH WITH
GUST OVER 35 MPH. WINDS WILL DECREASE BELOW ADVISORY VALUES DURING
THE LATE EVENING HOURS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT SUSTAINED WINDS OF 26 TO 39 MPH ARE
EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...
ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$
1 follow-up statement
765 
WWUS74 KEWX 110223
NPWEWX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
923 PM CDT SUN APR 10 2011

...WIND ADVISORY FOR AREAS ALONG AND EAST OF HIGHWAY 281 HAS
BEEN CANCELLED...

.WITH THE LOSS OF DAYTIME HEATING...MIXING OF THE STRONGER UPPER 
LEVEL WINDS TO THE SURFACE HAS ENDED...THUS LOWERING SURFACE WINDS
SPEEDS FROM CRITERIA LEVELS. THUS...THE WIND ADVISORY HAS BEEN
CANCELLED.

TXZ172-173-190>194-205>209-220>225-110330-
/O.CAN.KEWX.WI.Y.0006.000000T0000Z-110411T0300Z/
BURNET-WILLIAMSON-BLANCO-HAYS-TRAVIS-BASTROP-LEE-BEXAR-COMAL-
GUADALUPE-CALDWELL-FAYETTE-ATASCOSA-WILSON-KARNES-GONZALES-
DE WITT-LAVACA-
INCLUDING THE CITIES OF...BURNET...GEORGETOWN...BLANCO...
SAN MARCOS...AUSTIN...BASTROP...GIDDINGS...SAN ANTONIO...
NEW BRAUNFELS...SEGUIN...LOCKHART...LA GRANGE...PLEASANTON...
FLORESVILLE...KARNES CITY...GONZALES...CUERO...HALLETTSVILLE
923 PM CDT SUN APR 10 2011

...WIND ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS CANCELLED
THE WIND ADVISORY. 

WITH THE LOSS OF DAYTIME HEATING...MIXING OF THE STRONGER UPPER 
LEVEL WINDS TO THE SURFACE HAS ENDED...THUS LOWERING SURFACE WINDS
SPEEDS FROM CRITERIA LEVELS. THUS...THE WIND ADVISORY HAS BEEN
CANCELLED. 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 9:09 PM CDTRed Flag WarningEWXEdwards, Kinney, Maverick, Val Verde42 hr
Apr 10, 3:11 PM CDTRed Flag WarningEWXAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 23 more24 hr

Nearby

Wind Advisories in Texas, 2011Every wind advisory 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.