583 FXUS64 KEWX 042013 AFDEWX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 313 PM CDT SAT MAY 4 2013 .SHORT TERM (TONIGHT THROUGH SUNDAY NIGHT)... THE DEEPENING CLOSED UPPER LOW MOVING OVER THE SOUTHEASTERN U.S. WILL SEND A WEAK COLD FRONT THROUGH MUCH OF THE REGION TONIGHT AND SUNDAY. FORECAST LOWS WILL BE TRICKY WITH SOME MINOR INCREASE IN HIGH CLOUDS AND SURFACE WINDS. FORECAST LOWS WILL BE GENERALLY IN THE 40S TONIGHT WITH LOW 50S ALONG THE RIO GRANDE. UNDER MOSTLY SUNNY SKIES SUNDAY...HIGHS WILL BE IN THE 70S OVER THE HILL COUNTRY AND ALONG AND EAST OF THE I-35 CORRIDOR FROM SAN ANTONIO NORTHWARD. ELSEWHERE LOW TO MID 80S WILL PREVAIL. && .LONG TERM (MONDAY THROUGH SATURDAY)... A WEAK RIDGE WILL REMAIN ANCHORED ACROSS THE REGION LATE SUNDAY THROUGH TUESDAY MORNING WITH CONTINUED COOL MORNING LOWS AND MILD TO WARM DAY-TIMES. RIDGING ALOFT WILL SOMEWHAT FLATTEN OUT FOR TUESDAY AS UPPER LEVEL PACIFIC MOISTURE AND CLOUDS INCREASE FROM THE WEST. SOUTHERLY FLOW WILL RETURN BY LATE TUESDAY AS WELL WITH AN INCREASE IN LOWER LEVEL GULF MOISTURE AND RESULTANT HUMIDITIES. THIS TREND TOWARD INCREASED GULF AND PACIFIC MOISTURE WILL CONTINUE THROUGH THE REMAINDER OF THE WEEK AS AN ACTIVE AND STRENGTHENING SUBTROPICAL JET BECOMES THE DOMINANT FEATURE. WITH THE STRENGTHENING OF THE JET...PRESSURE FALLS OVER NORTHWEST TEXAS WILL INCREASE LOW LEVEL GULF MOISTURE AND BY LATE IN THE WEEK...NIGHTTIME LOWS WILL BE SLIGHTLY ABOVE NORMAL AND DAYTIME HIGHS NEAR SEASONAL. BY LATE WEDNESDAY AFTERNOON/EVENING ENOUGH RICH GULF MOISTURE WILL HAVE REACHED THE MEXICAN PLATEAU TO DEVELOP STORMS WHICH MAY BE FORCED OFF THE PLATEAU BY UPPER LEVEL DISTURBANCES. ISOLATED SHOWERS AND STORMS WEDNESDAY EVENING FROM THE SOUTHERN EDWARDS PLATEAU TO THE MID RIO GRANDE PLAINS. THE WEATHER PATTERN WILL CHANGE LITTLE ON THURSDAY WITH CONTINUED WEAK DISTURBANCES AND SIERRA DEL BURRO ACTIVITY PUSHING EASTWARD. THERE IS A SLIGHT CHANCE THESE STORMS COULD TRAVERSE ACROSS THE REGION THURSDAY NIGHT AND FRIDAY IN THE UPPER LEVEL SOUTHWESTERLY JET. A BROAD UPPER LOW...HAVING MEANDERED OVER MUCH OF THE SOUTHWEST U.S. TUESDAY THROUGH THURSDAY WILL PUSH INTO WEST TEXAS BY SATURDAY...SENDING A DRY LINE INTO WESTERN PORTIONS OF OUR REGION. THIS WILL BECOME FOCUS FOR POTENTIAL THUNDERSTORM DEVELOPMENT SATURDAY BEFORE A COLD FRONT PUSHES INTO THE REGION SATURDAY NIGHT. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 48 78 52 82 56 / 0 0 0 - - AUSTIN BERGSTROM INTL AIRPORT 45 77 48 81 53 / 0 0 0 - - NEW BRAUNFELS MUNI AIRPORT 47 79 49 83 53 / 0 0 0 - - BURNET MUNI AIRPORT 46 77 50 80 55 / 0 0 0 - - DEL RIO INTL AIRPORT 53 86 59 84 61 / 0 0 0 10 10 GEORGETOWN MUNI AIRPORT 46 76 49 80 54 / 0 0 0 - - HONDO MUNI AIRPORT 48 82 51 82 55 / 0 0 0 - 10 SAN MARCOS MUNI AIRPORT 47 77 50 81 54 / 0 0 0 - - LA GRANGE - FAYETTE REGIONAL 46 77 51 81 57 / 0 0 0 - - SAN ANTONIO INTL AIRPORT 49 79 52 81 56 / 0 0 0 - - STINSON MUNI AIRPORT 49 79 52 81 56 / 0 0 0 - - && .EWX WATCHES/WARNINGS/ADVISORIES...NONE. && $$ MESOSCALE/AVIATION...13 SYNOPTIC/GRIDS...02 PUBLIC SERVICE/DATA COLLECTION...33