FNUS71 KAKQ 231613 FWSAKQ SPOT FORECAST FOR 780...NCFS NATIONAL WEATHER SERVICE WAKEFIELD VA 1113 AM EST WED FEB 23 2011 FORECAST IS BASED ON IGNITION TIME OF 1130 EST ON FEBRUARY 23. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... HIGH PRESSURE BECOMES CENTERED ALONG THE MID AND NORTHERN ATLANTIC SEABOARD TODAY...THEN SHIFTS OFF THE COAST TONIGHT. LOW PRESSURE WILL TRACK NORTHEAST FROM THE LOWER MISSISSIPPI VALLEY LATE THURSDAY...THEN ACROSS THE NORTHERN MID ATLANTIC STATES ON FRIDAY. A COLD FRONT ASSOCIATED SOUTHWEST OF THE LOW WILL PUSH THROUGH THE AREA FRIDAY AFTERNOON AND EARLY EVENING. HIGH PRESSURE RETURNS TO THE REGION FRIDAY NIGHT THROUGH THE WEEKEND. .TODAY... SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT)...THEN BECOMING SUNNY (5-15 PERCENT). MAX TEMPERATURE.....AROUND 48. MIN HUMIDITY........38 PERCENT. WIND (20FT/2MIN)....NORTHEAST WINDS 5 TO 8 MPH. MIXING HEIGHT.......300-2200 FT AGL...INCREASING TO 2000-3400 FT AGL LATE IN THE MORNING. TRANSPORT WINDS.....NORTHEAST 6 TO 12 MPH. VENTILATION RATE....VERY POOR (2000-20200 FT-MPH). TIME (EST) 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P SKY (%).........0 0 0 0 0 0 1 1 3 5 7 9 WEATHER COV..... WEATHER TYPE.... TEMP............44 46 47 47 46 45 44 42 39 36 35 34 RH..............49 45 40 42 43 47 53 59 64 66 69 78 20 FT WIND DIR..NE NE NE NE NE NE NE NE NE NE E E 20 FT WIND SPD..7 7 6 6 6 6 5 5 4 4 4 3 20 FT WIND GUST.10 10 10 10 10 10 10 10 10 5 5 5 MIX HGT (KFT)...3.0 3.4 3.4 3.2 3.1 2.9 2.0 1.1 0.3 0.3 0.3 0.3 TRANSP WIND DIR.N N NE NE NE NE E E E E E E TRANSP WIND SPD.9 7 6 6 7 7 8 9 9 8 7 6 .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT). MIN TEMPERATURE.....AROUND 31. MAX HUMIDITY........92 PERCENT. WIND (20FT/2MIN)....NORTHEAST WINDS 5 TO 6 MPH EARLY IN THE EVENING...BECOMING LIGHT. MIXING HEIGHT.......300-1100 FT AGL. TRANSPORT WINDS.....SOUTHEAST 6 TO 9 MPH. VENTILATION RATE....VERY POOR (1200-8200 FT-MPH). .THURSDAY... SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT)...THEN BECOMING MOSTLY CLOUDY (75-85 PERCENT). MAX TEMPERATURE.....AROUND 57. MIN HUMIDITY........52 PERCENT. WIND (20FT/2MIN)....LIGHT WINDS...BECOMING SOUTH 5 TO 9 MPH IN THE LATE MORNING AND AFTERNOON. MIXING HEIGHT.......300-2000 FT AGL...INCREASING TO 1500-2800 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....SOUTH 6 TO 15 MPH. VENTILATION RATE....VERY POOR (1300-30300 FT-MPH). .FORECAST DAYS 3 THROUGH 5... .FRIDAY... WARMER. MOSTLY CLOUDY. SHOWERS LIKELY. LOWS IN THE UPPER 40S. HIGHS IN THE LOWER 70S. SOUTH WINDS AROUND 14 MPH. .SATURDAY... COOLER. MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 50S. NORTH WINDS AROUND 9 MPH. .SUNDAY... WARMER. MOSTLY CLOUDY. LOWS IN THE LOWER 40S. HIGHS IN THE MID 60S. SOUTH WINDS AROUND 5 MPH. FORECASTER...HURLEY REQUESTED BY...T HURDLE TYPE OF REQUEST...PRESCRIBED .TAG 20110223.780__.01/AKQ