000 FXUS64 KEWX 041728 AFDEWX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1228 PM CDT SAT JUL 4 2009 .DISCUSSION... SEE AVIATION DISCUSSION. && .AVIATION... VFR CONDITIONS WILL HOLD THROUGH THE PERIOD EXCEPT FOR A 5 HOUR WINDOW BETWEEN 09Z AND 14Z WHEN MVFR CEILINGS DEVELOP FROM KSSF TO KAUS. SOUTHERLY WINDS OF 10 TO 20 KTS WILL SUBSIDE TO ARND 10 KTS BY 06Z, THEN INCREASE TO 10 TO 15 KTS BY 15Z. && .PREV DISCUSSION... /ISSUED 1110 AM CDT SAT JUL 4 2009/ UPDATE...STRONG UPPER RIDGING CONTINUES WITH MOIST SOUTHERLY FLOW AT SURFACE. SOUTHERN AND EASTERN PORTIONS WILL REMAIN OPPRESSIVELY HOT WITH COMBINED HIGH HEAT AND HUMIDITIES. HEAT ADVISORY IN PLACE. LOWER DEWPOINTS WESTERN SECTIONS WILL MAKE THE AFTERNOON LESS OPPRESSIVE. LITTLE OTHER THAN MINOR TWEAKS TO GRIDS MADE..NOT AFFECTING TEXT FORECASTS. PREV DISCUSSION... /ISSUED 619 AM CDT SAT JUL 4 2009/ AVIATION... PATCHY MVFR CIGS THIS MORNING WILL QUICKLY GIVE WAY TO VFR CONDITIONS WITH SELY WINDS AT 10-20 KNOTS THROUGH THIS EVENING. AFTER 06Z PATCHY MVFR CIGS WILL DEVELOP AGAIN AT KSAT,KSSF, AND KAUS. ISOLATED SHRA/TSRA WILL DEVELOP OVER THER COASTAL PLAINS BETWEEN 04/20Z AND 05/00Z. PREV DISCUSSION... /ISSUED 512 AM CDT SAT JUL 4 2009/ DISCUSSION... QUICK UPDATE TO EXPAND AND EXTEND HEAT ADVISORY ACROSS SOUTHEASTERN HALF OF THE CWA UNTIL 7 PM SUNDAY. PREV DISCUSSION... /ISSUED 357 AM CDT SAT JUL 4 2009/ DISCUSSION... RIDGING ALOFT WILL MAKE FOR CONTINUING HOT CONDITIONS THROUGH THE HOLIDAY WEEKEND. AFTERNOON HIGHS WILL ONCE AGAIN HOVER NEAR 100 TODAY AND SUNDAY. AN UPPER LEVEL DISTURBANCE WILL APPROACH SOUTH CENTRAL TEXAS ON SUNDAY BRINGING A CHANCE FOR RAIN DURING THE AFTERNOON THROUGH OVERNIGHT. A WEAK SFC BOUNDARY REMAINING ACROSS THE AREA WILL KEEP MENTIONABLE CHANCES FOR RAIN THROUGH THE BEGINNING OF THE WEEK. AFTERNOON TEMPERATURES MONDAY AND TUESDAY WILL BE SLIGHTLY MODERATED DUE TO A COMBINATION OF THE RETURN OF SOME CLOUDS IN ADDITION TO THE RAIN CHANCES. NONETHELESS...STILL EXPECTING HIGHS TO PEAK IN THE MID TO UPPER 90S. THE RIDGE WILL SLOWLY TRY TO RE-STRENGTHEN THROUGH THE REST OF THE WORK WEEK...BUT WILL LIKELY SEE SEA-BREEZE ACTIVITY EACH AFTERNOON. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 78 99 75 95 76 / 10 20 30 40 30 AUSTIN BERGSTROM INTL AIRPORT 76 99 73 95 73 / - 20 30 40 30 NEW BRAUNFELS MUNI AIRPORT 75 101 73 97 74 / - 10 20 20 20 BURNET MUNI AIRPORT 76 97 74 94 74 / 10 20 30 40 30 DEL RIO INTL AIRPORT 78 100 77 97 78 / - - 20 20 20 GEORGETOWN MUNI AIRPORT 77 99 74 94 75 / 10 20 30 40 30 HONDO MUNI AIRPORT 75 100 74 97 75 / - - 10 20 20 SAN MARCOS MUNI AIRPORT 77 100 74 96 75 / - 10 20 30 20 LA GRANGE - FAYETTE REGIONAL 77 102 75 94 74 / 10 10 10 40 20 SAN ANTONIO INTL AIRPORT 78 100 77 96 77 / - - 10 20 20 STINSON MUNI AIRPORT 78 100 76 97 77 / - - - 20 20 && .EWX WATCHES/WARNINGS/ADVISORIES... HEAT ADVISORY UNTIL 7 PM CDT SUNDAY FOR THE FOLLOWING COUNTIES: ATASCOSA...BASTROP...BEXAR...CALDWELL...COMAL...DE WITT...DIMMIT... FAYETTE...FRIO...GONZALES...GUADALUPE...HAYS...KARNES...LAVACA... LEE...MAVERICK...MEDINA...TRAVIS...UVALDE...WILLIAMSON...WILSON... ZAVALA. && $$ 02/06