FXUS64 KEWX 071125
AFDEWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
525 AM CST MON DEC 7 2009
.DISCUSSION...
SEE AVIATION FORM THE 12Z TAF DISCUSSION.
&&
.AVIATION...
LIFR/VLIFR CONDITIONS WILL PREVAIL THIS MORNING IMPROVING TO IFR
BY 18Z. CONDITIONS WILL DETERIORATE THIS EVENING AND TONIGHT TO
LIFR/VLIFR. A WEAK COLD FRONT WILL FILTER SOUTHWARD TODAY WHICH
WILL IMPROVE THE VSBYS AS THE TEMP/DEWPOINT SPREAD INCREASES.
OVERCAST SKIES WILL PREVAIL THRU THIS TAF CYCLE AS THE SHALLOW
AND COOL AIRMASS IS OVERRUN BY GULF MOISTURE. VSBYS AND CIGS
WILL LOWER AGAIN OVERNIGHT AS THE TEMP LOWERS AND APPROACHES
THE DEWPOINT. -DZ IS ALSO EXPECTED AFTER 06Z AS THE LOW LEVEL
JET INCREASES WITH THE APPROACH OF THE NEXT UPPER LEVEL DISTURBANCE.
&&
.PREV DISCUSSION... /ISSUED 337 AM CST MON DEC 7 2009/
DISCUSSION...
A REINFORCING COOL SURGE OF AIR TODAY WITH SHALLOW GULF OVERRUN
WILL RESULT LOW CHANCES OF LIGHT RAIN OR DRIZZLE WITH WIDESPREAD
FOG..DENSE IN SPOTS THIS MORNING. A DENSE FOG ADVISORY REMAINS IN
EFFECT UNTIL 10 AM THIS MORNING. MODIFICATION OF AIRMASS WILL
BEGIN TONIGHT AS WINDS WEAKEN AND GULF MOISTURE CONTINUES TO
OVERRUN SHALLOW COOL POOL WITH MOSTLY LIGHT DRIZZLE AND
DEVELOPING LATE NIGHT DENSE FOG AGAIN OVER ROUGHLY THE EASTERN
HALF OF THE REGION. WESTERLIES WILL MIX OUT THE MODIFIED AIRMASS
TUESDAY WITH DECREASING CLOUDINESS AND MILDER AFTERNOON
TEMPERATURES. SKIES WILL CLEAR TUESDAY NIGHT AS A DRIER PACIFIC
FRONT PUSHES THROUGH. ANOTHER SURGE OF COLDER AIR WILL BACKDOOR
ITS WAY INTO SOUTH CENTRAL TEXAS WEDNESDAY AFTERNOON WITH
COOLER AFTERNOON READINGS EXPECTED GENERALLY EAST OF INTERSTATE
HIGHWAY 281. MOSTLY CLEAR AND COLD WEDNESDAY NIGHT AS THE
SHALLOW COOL POOL SETTLES OVER THE REGION..THEN INCREASING
CLOUDINESS THURSDAY AS GULF MOISTURE BEGINS TO OVERRUN. A
DEVELOPING SURFACE LOW ALONG THE LOWER TEXAS COAST THURSDAY
NIGHT WILL AID IN OVERRUNNING GULF MOISTURE WITH A CHANCE OF
LIGHT RAIN OR SHOWERS. OUR STRONG WESTERLY JET WILL TRY TO
MIX OUT THE LOWER LEVEL MOISTURE DURING THE DAY FRIDAY EVEN AS
ANOTHER SURGE OF COLDER AIR PUSHES INTO THE NORTHEAST CORRIDOR.
CLEARING FRIDAY AS READINGS AGAIN LOWER IN DRIER CP (CONTINENTAL
POLAR) AIRMASS. A COOL RIDGE WILL SETTLE OVER THE REGION SATURDAY
WITH MOSTLY SUNNY SKIES BUT COOL DAYTIME READINGS. THEN..
SOUNDING LIKE A BROKEN RECORD IN THIS EL NINO PATTERN..RAPID
CHANGE TO LOW LEVEL SOUTHERLY FLOW AND INCREASING CLOUDINESS
SATURDAY NIGHT AS GULF BEGINS ITS OVERRUN. AIRMASS MODIFIES
NEXT SUNDAY IN SOUTHERLY FLOW AND MILDER DAYTIME READINGS.
&&
.PRELIMINARY POINT TEMPS/POPS...
AUSTIN CAMP MABRY 50 47 66 49 61 / 60 40 30 10 -
AUSTIN BERGSTROM INTL AIRPORT 53 47 67 45 62 / 60 40 30 10 -
NEW BRAUNFELS MUNI AIRPORT 54 48 69 48 69 / 50 30 20 10 -
BURNET MUNI AIRPORT 47 45 66 47 58 / 50 30 20 10 -
DEL RIO INTL AIRPORT 58 51 74 51 75 / 10 10 - - -
GEORGETOWN MUNI AIRPORT 49 46 64 48 57 / 60 40 30 10 -
HONDO MUNI AIRPORT 54 48 72 49 71 / 40 20 10 - -
SAN MARCOS MUNI AIRPORT 54 46 66 48 62 / 60 40 20 10 -
LA GRANGE - FAYETTE REGIONAL 56 53 65 48 59 / 70 60 30 10 10
SAN ANTONIO INTL AIRPORT 54 50 68 50 67 / 50 30 20 10 -
STINSON MUNI AIRPORT 55 48 73 51 65 / 50 20 20 10 -
&&
.EWX WATCHES/WARNINGS/ADVISORIES...
DENSE FOG ADVISORY UNTIL 10 AM CST THIS MORNING FOR THE FOLLOWING
COUNTIES: ATASCOSA...BANDERA...BASTROP...BEXAR...BLANCO...BURNET...
CALDWELL...COMAL...DE WITT...FAYETTE...FRIO...GILLESPIE...
GONZALES...GUADALUPE...HAYS...KARNES...KENDALL...KERR...LAVACA...
LEE...LLANO...MEDINA...TRAVIS...WILLIAMSON...WILSON.
&&
$$
02/13
