000 FXUS64 KBRO 251819 AFDBRO AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BROWNSVILLE TX 120 PM CDT MON JUN 25 2007 .DISCUSSION...ONLY A FEW ISOLATED SHOWERS HAVE MOVED OVER THE RIO GRANDE VALLEY TODAY. HOWEVER THERE IS A CHANCE FOR SHOWERS AND ISOLATED THUNDERSTORMS MOVING ACROSS PORTIONS OF THE CWA THROUGH THIS EVENING ALONG THE SEABREEZE BOUNDARY. A LOW PRESSURE TROUGH LOCATED ACROSS THE CENTRAL UNITED STATES COMBINED WITH A MOIST ATMOSPHERE WILL CONTINUE TO PRODUCE A CHANCE FOR SHOWERS AND ISOLATED THUNDERSTORMS ON TUESDAY, PRIMARILY DURING THE AFTERNOON AND EARLY EVENING ALONG THE SEABREEZE BOUNDARY. DRIER CONDITIONS WILL PREVAIL OVER THE RIO GRANDE VALLEY WEDNESDAY THROUGH FRIDAY. TEMPERATURES WILL WARM TO ABOVE NORMAL VALUES FOR THIS TIME OF THE YEAR BY WEDNESDAY AS PARTLY CLOUDY SKIES AND DRIER CONDITIONS PREVAIL OVER DEEP SOUTH TEXAS. THE HIGH PRESSURE RIDGE EXTENDING INTO THE CWA WILL CONTINUE TO PRODUCE SOUTHEAST TO EAST WINDS OVER THE RIO GRANDE VALLEY THROUGH THE END OF THE FORECAST PERIOD. THE COMBINATION OF THE HIGH PRESSURE RIDGE AND THE LOW PRESSURE TROUGH LOCATED OVER THE CENTRAL UNITED STATES HAS INCREASED THE PRESSURE GRADIENT OVER THE CWA. THE WINDS HAVE INCREASED THIS AFTERNOON BECOMING MODERATE TO MODERATE AND GUSTY. THE WINDS WILL DECREASE OVERNIGHT BECOMING LIGHT TO MODERATE THEN INCREASE ON TUESDAY BECOMING MODERATE TO STRONG AND GUSTY. THE PRESSURE GRADIENT WILL RELAX OVER THE CWA BY WEDNESDAY AND LIGHT WINDS WILL PREVAIL OVER DEEP SOUTH TEXAS DURING THE OVERNIGHT PERIODS THEN LIGHT TO MODERATE WINDS WILL PREVAIL ACROSS THE RIO GRANDE VALLEY DURING THE AFTERNOONS AND EARLY EVENINGS WEDNESDAY THROUGH THE WEEKEND. && .MARINE...BUOY020 REPORTED SE WINDS AT 15 KTS AND SEAS AT 4 FT. THE PRESSURE GRADIENT WILL CONTINUE TO TIGHTEN THIS AFTERNOON AND EVENING AS DEEPENING LOW PRESSURE OVER THE CENTRAL PLAINS INTERACTS WITH HIGH PRESSURE OVER THE EASTERN GULF OF MEXICO AND SMALL CRAFT SHOULD EXERCISE CAUTION. THE PRESSURE GRADIENT WILL RELAX WEDNESDAY ALLOWING WINDS AND SEAS TO SUBSIDE HEADING INTO THE WEEKEND. && .AVIATION...ISOLD TO SCT CONVECTION WILL PRODUCE IFR TO MVFR CONDITIONS THROUGH THIS EVENING. MVFR CIGS EXPECTED TUE AM BETWEEN 13-16Z AS CU FIELD DEVELOPS LIFTING/SCATTERING TO VFR BY LATE AM. && .PRELIMINARY POINT TEMPS/POPS... BAYVIEW/PORT ISABEL 78 90 79 90 79 / 10 30 00 00 00 BROWNSVILLE 76 92 77 92 77 / 10 30 00 00 00 HARLINGEN 76 93 76 94 76 / 10 30 00 00 00 MCALLEN 76 95 76 95 76 / 00 30 00 00 00 RIO GRANDE CITY 76 97 76 98 76 / 00 10 00 00 00 SOUTH PADRE ISLAND 80 86 80 87 80 / 10 30 00 00 00 && .BRO WATCHES/WARNINGS/ADVISORIES...NONE. && $$ THIS PRODUCT IS ALSO AVAILABLE ON OUR INTERNET WEB PAGE AT: HTTP://WWW.SRH.NOAA.GOV/BRO SYNOPTIC/GRIDS....63 MARINE/AVIATION...55 MESOSCALE...MARTINEZ