000 FXUS64 KEWX 080543 AFDEWX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1143 PM CST SAT NOV 7 2009 .DISCUSSION... SEE AVIATION SECTION. && .AVIATION... BKN MID LVL CLDS EXPECTED TO KEEP DENSE FOG FROM DEVELOPING AS MUCH AS PREVIOUSLY FORECAST. VSBYS OF 1-3 MILES IN FOG BTWN 09Z- 15Z IN I-35 CORRIDOR TAFS WITH LOW CLOUDS OF 6 HND TO 12 HND FT THRU 15Z-17Z. SCT TSRA SUN AFTN AS UPR TROF LIFTS NEWD ACROSS AREA. LIGHT EAST TO SOUTHEAST WINDS TO PREVAIL WITH WINDS SHIFTING TO NORTHEAST LATE IN PERIOD IN 30 HR TAFS AT KAUS AND KSAT. && .PREV DISCUSSION... /ISSUED 756 PM CST SAT NOV 7 2009/ UPDATE... WILL ISSUE AN NPW FOR DENSE FOG AT 8 PM...VALID FROM 3 AM TO 10 AM SUNDAY. DECIDED THAT EVEN THOUGH MID-LEVEL CLOUDCOVER AND WARMER GROUND/BOUNDARY LAYER WILL DELAY AND/OR LIMIT FOG FORMATION... THERE STILL SHOULD BE ENOUGH FAVORABLE FACTORS FOR DENSE FOG ALONG THE BALCONES ESCARPMENT...LOW LYING AREAS OF ATASCOSA COUNTY...AND IN THE TREES OF BASTROP COUNTY. ELSEWHERE...EXPECT PATCHY FOG WITH WIDELY VARYING VISIBILITY FROM 1/2 TO 3 MILES. OTHERWISE...THE FORECAST IS ON TRACK. PREV DISCUSSION... /ISSUED 335 PM CST SAT NOV 7 2009/ DISCUSSION... INITIAL PATTERN IS AN UPPER LEVEL RIDGE EXTENDING FROM THE CENTRAL GULF COAST BACK ACROSS NORTHERN TX INTO NM WITH A TROUGH OVER THE BAJA PENINSULA. SFC HIGH PRESSURE IS CENTERED OVER THE CAROLINAS AND STRETCHES THROUGH THE SOUTHEAST TO CENTRAL TX. THIS SET UP WILL LEAD TO A CLOUDLESS EVENING AND GOOD RADIATIONAL COOLING. EXPECT THIS TO BRING A REPEAT OF MORNING FOG..THE WORST OF WHICH WILL BE ALONG THE ESCARPMENT AND DOWN I37. WE MAY NEED A DENSE FOG ADVISORY...BUT WILL LET LATER SHIFTS SEE HOW THINGS DEVELOP. LATER ON SUN THE TROUGH IN THE WEST WILL MOVE ACROSS NORTHERN MEXICO INTO TX. MODELS ARE IN GOOD AGREEMENT ON THIS. DEEP MOISTURE FROM THE GULF WILL ACCOMPANY THIS FEATURE AND BRING A CHANCE FOR SHOWERS AND THUNDERSTORMS...ESPECIALLY TO THE EAST. SHOWERS WILL LINGER INTO THE OVERNIGHT HOURS. STARTING MON...THE UPPER RIDGE WILL RE-ESTABLISH ITSELF ABOVE OUR AREA RETURNING DRY AND WARM WEATHER. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 61 74 61 77 60 / - 30 20 - - AUSTIN BERGSTROM INTL AIRPORT 56 74 58 77 56 / - 30 20 - 0 NEW BRAUNFELS MUNI AIRPORT 55 74 59 77 56 / - 30 20 0 0 BURNET MUNI AIRPORT 56 70 58 73 56 / - 20 20 0 - DEL RIO INTL AIRPORT 61 75 60 77 56 / - 10 - 0 - GEORGETOWN MUNI AIRPORT 58 73 59 75 57 / - 20 20 - - HONDO MUNI AIRPORT 55 75 60 77 58 / - 30 20 0 0 SAN MARCOS MUNI AIRPORT 56 74 59 76 58 / - 30 20 - 0 LA GRANGE - FAYETTE REGIONAL 57 75 61 77 58 / - 40 20 - - SAN ANTONIO INTL AIRPORT 57 74 60 77 59 / - 30 20 0 0 STINSON MUNI AIRPORT 58 75 60 76 58 / - 30 20 0 0 && .EWX WATCHES/WARNINGS/ADVISORIES... DENSE FOG ADVISORY FROM 3 AM TO 10 AM CST SUNDAY FOR THE FOLLOWING COUNTIES: ATASCOSA...BASTROP...BEXAR...COMAL...GUADALUPE...HAYS... MEDINA...TRAVIS...UVALDE...WILLIAMSON. && $$ 26/07