Alert archive / Texas / Wind Advisories in 2011

Wind Advisory 10, NWS Austin/San Antonio, TX

September 4, 20119 counties in Texas

NWS Austin/San Antonio, TX issued this wind advisory at Sep 4, 2011, 5:35 AM CDT for 9 counties in Texas. It took effect at Sep 4, 2011, 1:00 PM CDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Sep 4, 2011, 5:35 AM CDT (10:35 UTC)
In effect from
Sep 4, 2011, 1:00 PM CDT
Expired
Sep 4, 2011, 8:00 PM CDT
In force
7 hr
Issued by
NWS Austin/San Antonio, TX

Counties Bastrop County, TX, Caldwell County, TX, DeWitt County, TX, Fayette County, TX, Gonzales County, TX, Lavaca County, TX, Lee County, TX, Travis County, TX, Williamson County, TX

The radar

The Austin/San Antonio radar (KEWX), 70 km from the middle of the area, began a volume at 10:34 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 00:00Z, 10.6 hours before the alert went out and 240 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 00:00Z on 2011-09-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 13 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 00:00Z on 2011-09-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 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
13 J/kg
Mixed-layer CIN
-323 J/kg
Mixed-layer LCL
3119 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
55 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.

738 
WWUS74 KEWX 041035
NPWEWX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
535 AM CDT SUN SEP 4 2011

...A WIND ADVISORY IS IN EFFECT FROM 1 PM TO 6 PM THIS AFTERNOON
OVER EASTERN PORTIONS OF SOUTH CENTRAL TEXAS...GENERALLY ALONG AND 
EAST OF U.S. HIGHWAY 183...

.A COLD FRONT PUSHING SOUTHWARD INTO THE REGION THIS AFTERNOON
COUPLED WITH MIXING OF STRONG NORTH WINDS TO THE SURFACE VIA
TROPICAL STORM LEE'S BROAD CIRCULATION OF INFLUENCE WILL PRODUCE
SUSTAINED AND GUSTY NORTH WINDS OF 25 TO 35 MPH.

TXZ173-192>194-208-209-223>225-042300-
/O.NEW.KEWX.WI.Y.0010.110904T1800Z-110904T2300Z/
WILLIAMSON-TRAVIS-BASTROP-LEE-CALDWELL-FAYETTE-GONZALES-DE WITT-
LAVACA-
INCLUDING THE CITIES OF...GEORGETOWN...AUSTIN...BASTROP...
GIDDINGS...LOCKHART...LA GRANGE...GONZALES...CUERO...
HALLETTSVILLE
535 AM CDT SUN SEP 4 2011

...WIND ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO 6 PM CDT
THIS EVENING...

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
WIND ADVISORY...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO
6 PM CDT THIS EVENING. 

* EVENT...NORTH WINDS INCREASING TO 25 TO 35 MPH.

* TIMING...1 PM TO 6 PM. 

* IMPACT...CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
  PROFILE VEHICLES. TRASH CANS AND OTHER LIGHT OBJECTS LEFT
  UN-ANCHORED COULD BE BLOWN OVER.

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
955 
WWUS74 KEWX 042256
NPWEWX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
556 PM CDT SUN SEP 4 2011

...A WIND ADVISORY IS IN EFFECT UNTIL 8 PM FOR EASTERN PORTIONS
OF SOUTH CENTRAL TEXAS...GENERALLY ALONG AND EAST OF U.S. HIGHWAY
183...

.A COLD FRONT PUSHING SOUTHWARD INTO THE REGION HAS COMBINED
WITH TROPICAL STORM LEE'S BROAD CIRCULATION AND HAS RESULTED IN
STRONG AND GUSTY NORTH WINDS. SUSTAINED WINDS NEAR 25 MPH WITH
GUSTS REACHING 35 MPH WILL CONTINUE THROUGH THIS EVENING. THE
STRONG WINDS AND GUSTS WILL GRADUALLY DECREASE AFTER SUNSET...BUT
WINDS ARE EXPECTED TO REMAIN 15 TO 20 MPH THROUGH THE REST OF THE
NIGHT.

TXZ173-192>194-208-209-223>225-050100-
/O.EXT.KEWX.WI.Y.0010.000000T0000Z-110905T0100Z/
WILLIAMSON-TRAVIS-BASTROP-LEE-CALDWELL-FAYETTE-GONZALES-DE WITT-
LAVACA-
INCLUDING THE CITIES OF...GEORGETOWN...AUSTIN...BASTROP...
GIDDINGS...LOCKHART...LA GRANGE...GONZALES...CUERO...
HALLETTSVILLE
556 PM CDT SUN SEP 4 2011

...WIND ADVISORY NOW IN EFFECT UNTIL 8 PM CDT THIS EVENING...

* EVENT...NORTH WINDS OF 25 TO 30 MPH.

* TIMING...UNTIL 8 PM.

* IMPACT...CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH 
  PROFILE VEHICLES. TRASH CANS AND OTHER LIGHT OBJECTS LEFT UN- 
  ANCHORED COULD BE BLOWN OVER. 

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.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 4, 10:54 AM CDTRed Flag WarningEWXAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 27 more35 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.