FNUS71 KAKQ 231614 FWSAKQ SPOT FORECAST FOR 750...NCFS NATIONAL WEATHER SERVICE WAKEFIELD VA 1114 AM EST WED FEB 23 2011 FORECAST IS BASED ON IGNITION TIME OF 1115 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.........CLOUDY (85-95 PERCENT)...THEN BECOMING MOSTLY SUNNY (30-40 PERCENT). MAX TEMPERATURE.....AROUND 50. MIN HUMIDITY........37 PERCENT. WIND (20FT/2MIN)....LIGHT WINDS...BECOMING NORTHEAST 5 TO 6 MPH IN THE LATE MORNING AND EARLY AFTERNOON...THEN BECOMING LIGHT EARLY IN THE AFTERNOON. MIXING HEIGHT.......300-1900 FT AGL...INCREASING TO 2300-4100 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....NORTH 3 TO 12 MPH. VENTILATION RATE....VERY POOR (2000-16700 FT-MPH). TIME (EST) 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P SKY (%).........29 29 29 20 11 2 2 1 5 9 13 17 WEATHER COV..... WEATHER TYPE.... TEMP............41 43 46 47 49 49 49 43 41 39 37 36 RH..............52 50 47 42 40 40 53 59 62 67 67 75 20 FT WIND DIR..NE NE NE NE NE E E E E E E SE 20 FT WIND SPD..4 4 4 3 3 3 3 3 2 2 2 2 20 FT WIND GUST.5 5 5 5 5 5 5 5 MIX HGT (KFT)...2.3 2.6 3.1 3.6 4.1 4.1 2.8 1.5 0.3 0.3 0.3 0.3 TRANSP WIND DIR.N N N N N N E E E E E E TRANSP WIND SPD.9 8 7 6 5 5 6 7 7 7 6 6 .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT). MIN TEMPERATURE.....AROUND 30. MAX HUMIDITY........88 PERCENT. WIND (20FT/2MIN)....LIGHT WINDS. MIXING HEIGHT.......300-1500 FT AGL. TRANSPORT WINDS.....SOUTHEAST 5 TO 7 MPH. VENTILATION RATE....VERY POOR (900-7300 FT-MPH). .THURSDAY... SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT)...THEN BECOMING CLOUDY (85-95 PERCENT). MAX TEMPERATURE.....AROUND 60. MIN HUMIDITY........40 PERCENT. WIND (20FT/2MIN)....LIGHT WINDS...BECOMING SOUTH 6 TO 10 MPH IN THE LATE MORNING AND AFTERNOON. MIXING HEIGHT.......300-2200 FT AGL...INCREASING TO 2100-3300 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....SOUTH 3 TO 12 MPH...INCREASING TO 13 TO 17 MPH LATE IN THE MORNING. VENTILATION RATE....VERY POOR TO FAIR (900-46400 FT-MPH). .FORECAST DAYS 3 THROUGH 5... .FRIDAY... WARMER. MOSTLY CLOUDY WITH SHOWERS LIKELY. LOWS IN THE LOWER 50S. HIGHS IN THE LOWER 70S. SOUTH WINDS AROUND 12 MPH. .SATURDAY... COOLER. MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE UPPER 50S. NORTH WINDS AROUND 5 MPH. .SUNDAY... WARMER. MOSTLY CLOUDY. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 60S. LIGHT WINDS. FORECASTER...HURLEY REQUESTED BY...T HURDLE TYPE OF REQUEST...PRESCRIBED .TAG 20110223.750__.01/AKQ