000 FXUS62 KRAH 290659 AFDRAH AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RALEIGH NC 300 AM EDT FRI AUG 29 2008 .SYNOPSIS... BROAD WEAK HIGH PRESSURE OVER THE EASTERN UNITED STATES WILL BRING A FEW MAINLY AFTERNOON AND EVENING THUNDERSTORMS AND ABOVE NORMAL TEMPERATURES THROUGH SUNDAY. .NEAR TERM /THROUGH TONIGHT/... AS OF 215 AM... PRECIPITABLE WATER AROUND 1.5 INCHES ACROSS CENTRAL NORTH CAROLINA TODAY... BEING SLIGHTLY HIGHER EAST THAN IN THE WEST. A WEAK SURFACE AND MID LEVEL TROUGH IN THE VICINITY OF HIGHWAY ONE MAY SLIGHTLY ENHANCE RAIN CHANCES THERE AND POINTS EAST. WINDS FIELDS HOWEVER ARE WEAK...THUS HEATING OF THE LATE MORNING AND AFTERNOON WILL BE NEEDED TO SET CONVECTION OFF. A ONE IN FOUR CHANCE FOR MEASURABLE RAIN AT BEST IN THE EAST...TAPERING OFF TO THE WEST. AFTERNOON HIGHS CONTINUE ABOVE NORMAL AT 85 TO 90. MODELS SHOWING SOME UPPER LEVEL SUPPORT FOR CONVECTION TONIGHT WITH VORTICITY ROTATING AROUND WEAK UPPER GEORGIA LOW. HOWEVER SOME MID LEVEL CAPPING OF LIFT IS ALSO INDICATED. SURFACE BASED LIFT DOES NOT LOOK STRONG ENOUGH TO OVERCOME THE SETTING UP OF THE NIGHTTIME INVERSION. THUS DO NOT EXPECT TO PERSIST TOO DEEP INTO THE EVENING HOURS. TEMPERATURES BY SUNRISE SATURDAY SHOULD BE IN THE 66 TO 72 DEGREE RANGE. .SHORT TERM /SATURDAY THROUGH SUNDAY/... AS OF 215 AM... NOT A TREMENDOUS AMOUNT OF DIFFERENCE BETWEEN FRIDAY AND THE WEEKEND. BROAD HIGH PRESSURE ALOFT TO OUR WEST FRIDAY IS FORECAST TO STRENGTHEN SLIGHTLY AND LIFT TO THE GREAT LAKES AREA BY SUNDAY MORNING. AS WITH FRIDAY... SLIGHTLY BETTER RAIN CHANCES IN THE EAST WHERE MOISTURE IS BEST...WITH MINIMAL CHANCES IN THE WEST. HIGHS MOSTLY UPPER 80S TO LOWER 90S... WITH LOWS MID 60S TO LOWER 70S. .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... AS 250 AM FRIDAY... AN UPPER LEVEL DISTURBANCES ASSOCIATED WITH A SURFACE LOW OVER THE EASTERN GULF WILL KEEP THE CHANCE OF UNSETTLED WEATHER MAINLY ACROSS THE SOUTHERN PORTION OF THE REGION SUNDAY HIGHT INTO EARLY MONDAY... OTHERWISE HIGH PRESSURE BUILDING DOWN THE ATLANTIC SEABOARD AT THE SURFACE AND ALOFT WILL BE THE CONTROLLING FEATURE OF THE AREAS WEATHER. TROPICAL SYSTEMS MOVING ACROSS THE GULF WILL BE MONITORED FOR POSSIBLE CHANGES TO OUR WEATHER THROUGH MID WEEK. HIGHS IN THE 80S. LOWS IN THE 60S. .AVIATION /06Z FRIDAY THROUGH TUESDAY/... AS OF 245 AM FRIDAY... ABUNDANT MOISTURE ESPECIALLY DOWN EAST...LIGHT WINDS AND THE LACK OF CLOUD COVER OVER SOME OF THE REGION WILL ALLOW FOR THE DEVELOPMENT OF FOG OVERNIGHT. IFR TO LIFR CONDITIONS WILL OVERSPREAD THE REGION THROUGH THE EARLY MORNING HOURS. THE STRATUS AND FOG WILL LIFT/DISSIPATE BETWEEN 13-14Z... RETURNING VFR CONDITIONS FOR THE AFTERNOON AND EVENING. SOUNDING DATA INDICATES AT LEAST THE DEVELOPMENT OF LOW CLOUDINESS AGAIN TONIGHT... WITH FOG POSSIBLE THROUGH EARLY SATURDAY MORNING. CHANCES FOR DIURNAL CONVECTION WILL BE BEST... ALTHOUGH LOW CHANCE ...OVER THE EAST DUE TO ABUNDANT MOISTURE AND WEAK SURFACE BOUNDARY. THE CHANCE FOR AFTERNOON AND EVENING CONVECTION WILL CONTINUE THROUGH SUNDAY... THEN HIGH PRESSURE WILL BUILD INTO THE THE REGION FROM THE NORTH... RETURNING VFR CONDITIONS TO THE AREA MONDAY AND TUESDAY. .RAH WATCHES/WARNINGS/ADVISORIES... NONE.