FNUS71 KAKQ 120956 FWSAKQ SPOT FORECAST FOR LATERAL WEST WF...FWS NATIONAL WEATHER SERVICE WAKEFIELD VA 556 AM EDT MON SEP 12 2011 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... AN UPPER LEVEL TROUGH OVER THE OHIO AND TENNESSEE VALLEYS WILL TRACK OVER THE REGION TODAY. THIS FEATURE COULD INTERACT WITH SEA BREEZE BOUNDARIES THIS AFTERNOON AND PRODUCE ISOLATED THUNDERSTORMS THROUGH LATE THIS EVENING. ONCE AGAIN...BRIEF PERIODS OF HEAVY RAIN AND GUSTY WINDS IN VICINITY OF THUNDERSTORMS WILL BE THE MAIN IMPACTS. WEAK HIGH PRESSURE BUILDS INTO THE MID ATLANTIC REGION TUESDAY BUT SEA BREEZE BOUNDARIES COULD TRIGGER VERY LIGHT ISOLATED SHOWERS IN THE AFTERNOON. ON WEDNESDAY A COLD FRONT WILL SLOWLY APPROACH FROM THE WEST... INCREASING HIGH CLOUDS THROUGH THE DAY. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT). ISOLATED SHOWERS AND THUNDERSTORMS THROUGH 0800 HOURS. THEN ISOLATED SHOWERS AND THUNDERSTORMS AFTER 1400 HOURS. MAX TEMPERATURE.....86 TO 91. MIN HUMIDITY........37 TO 42 PERCENT. WIND (20FT/2MIN)....LIGHT SOUTH WINDS THIS MORNING...BECOMING SOUTHWEST 5 TO 8 MPH AROUND 1200 HOURS. GUSTS TO 13 MPH ARE EXPECTED TO DEVELOP AFTER 1400 HOURS. GUSTY AND ERRATIC WINDS POSSIBLE NEAR THUNDERSTORMS IN THE AFTERNOON. MIXING HEIGHT.......300-2100 FT AGL...INCREASING TO 1600-3000 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....SOUTHWEST 9 TO 12 MPH. VENTILATION RATE....VERY POOR (2500-23800 FT-MPH). TIME (EDT) 5AM 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY (%).............40 38 35 27 29 31 33 34 36 38 40 42 44 WEATHER COV.........ISO ISO ISO ISO ISO ISO ISO WEATHER TYPE........RW RW RW RW RW RW RW TSTM COV............ISO ISO ISO ISO ISO ISO ISO TEMP................64 66 68 70 72 74 76 78 80 82 84 86 84 RH..................97 90 90 87 81 76 71 64 58 55 51 48 51 20 FT WIND DIR......W W W W W NW NW NW W W W S S 20 FT WIND SPD......2 2 3 3 2 2 1 3 3 6 5 5 3 20 FT WIND GUST..... 5 5 5 5 5 5 10 10 5 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT)...BECOMING MOSTLY CLEAR LATE. ISOLATED SHOWERS AND THUNDERSTORMS IN THE EVENING. MIN TEMPERATURE.....62 TO 64. MAX HUMIDITY........95 TO 99 PERCENT. WIND (20FT/2MIN)....SOUTHWEST 5 TO 8 MPH WITH GUSTS TO 13 MPH EARLY IN THE EVENING...BECOMING LIGHT AND VARIABLE LESS THAN 5 MPH. GUSTY AND ERRATIC WINDS POSSIBLE NEAR THUNDERSTORMS IN THE EVENING. MIXING HEIGHT.......300-1200 FT AGL. TRANSPORT WINDS.....SOUTHWEST 9 TO 15 MPH. VENTILATION RATE....VERY POOR (2300-9500 FT-MPH). TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM SKY (%).............46 48 50 45 39 34 29 23 18 17 16 16 WEATHER COV.........ISO ISO ISO ISO ISO ISO WEATHER TYPE........RW RW RW RW RW RW TSTM COV............ISO ISO ISO ISO ISO ISO TEMP................83 81 79 78 76 74 72 71 69 67 66 64 RH..................53 56 62 64 69 74 79 81 87 90 93 97 20 FT WIND DIR......S S S S S S S S S S S SW 20 FT WIND SPD......3 2 2 2 3 3 3 3 3 3 3 3 20 FT WIND GUST.....5 5 5 5 5 5 5 5 5 5 5 .TUESDAY... SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT). A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....87 TO 91. MIN HUMIDITY........35 TO 40 PERCENT. WIND (20FT/2MIN)....SOUTHWEST LESS THAN 5 MPH...BECOMING 5 TO 8 MPH AROUND 1200 HOURS. GUSTY AND ERRATIC WINDS POSSIBLE NEAR THUNDERSTORMS IN THE AFTERNOON. MIXING HEIGHT.......300-2000 FT AGL...INCREASING TO 2000-3700 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....SOUTHWEST 10 TO 13 MPH. VENTILATION RATE....VERY POOR (2400-32700 FT-MPH). TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY (%).............15 14 13 17 21 26 30 34 38 35 32 30 WEATHER COV......... SCH SCH SCH SCH WEATHER TYPE........ RW RW RW RW TSTM COV............ SCH SCH SCH SCH TEMP................66 68 70 72 74 77 79 81 83 85 87 85 RH..................90 87 81 76 71 64 60 56 53 50 45 48 20 FT WIND DIR......SW SW SW SW SW SW SW SW SW SW SW SW 20 FT WIND SPD......3 3 3 3 5 5 5 6 6 6 5 5 20 FT WIND GUST.....5 5 5 5 10 10 10 10 10 FORECASTER...DEROSA REQUESTED BY...MICHAEL DURFEE TYPE OF REQUEST...PRESCRIBED .TAG 20110912.LATER.01/AKQ