FNUS71 KAKQ 241355 FWSAKQ SPOT FORECAST FOR OWEN RX...TNC NATIONAL WEATHER SERVICE WAKEFIELD VA 855 AM EST THU FEB 24 2011 FORECAST IS BASED ON IGNITION TIME OF 1100 EST ON FEBRUARY 24. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... CLOUD COVER WILL INCREASE AND THICKEN TODAY AS LOW PRESSURE TRACKS NORTHEAST FROM THE LOWER MISSISSIPPI VALLEY...THEN ACROSS THE NORTHERN MID ATLANTIC STATES ON FRIDAY. THERE IS A CHANCE OF LIGHT RAIN LATER IN THE AFTERNOON AND EVENING AROUND THE BURN AREA. HOWEVER...THE BULK OF THE RAINFALL IS EXPECTED TO REMAIN TO THE NORTH. A COLD FRONT ASSOCIATED WITH 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 (35-45 PERCENT)...THEN BECOMING MOSTLY CLOUDY (80-90 PERCENT). A SLIGHT CHANCE OF LIGHT RAIN IN THE AFTERNOON...THEN A CHANCE OF RAIN LATE. MAX TEMPERATURE.....AROUND 58. MIN HUMIDITY........36 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 1400-3200 FT AGL EARLY IN THE AFTERNOON...THEN DECREASING TO 500-600 FT AGL LATE. TRANSPORT WINDS.....SOUTH 5 TO 12 MPH...INCREASING TO 15 TO 20 MPH IN THE LATE MORNING AND AFTERNOON. VENTILATION RATE....VERY POOR TO POOR (900-36300 FT-MPH)...INCREASING TO VERY POOR TO FAIR (5800-54200 FT-MPH) IN THE AFTERNOON. TIME (EST) 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P SKY (%).........66 78 89 91 93 94 96 98 99 96 94 91 WEATHER COV..... SCH SCH SCH CHC CHC CHC CHC CHC CHC WEATHER TYPE.... RN RN RN RN RN RN RN RN RN TEMP............50 53 56 56 57 57 56 55 54 53 52 53 RH..............44 41 38 40 40 42 45 51 54 61 66 69 20 FT WIND DIR..S S S S S S S S S S S S 20 FT WIND SPD..6 8 9 9 8 8 7 6 5 6 8 9 20 FT WIND GUST.10 10 15 15 15 15 10 10 10 10 15 15 MIX HGT (KFT)...1.2 2.2 3.2 2.3 1.4 0.6 0.5 0.4 0.3 0.3 0.3 0.3 TRANSP WIND DIR.S S S S SW SW S S S S S S TRANSP WIND SPD.17 18 20 20 20 18 15 12 9 12 16 21 .TONIGHT... SKY/WEATHER.........CLOUDY (85-95 PERCENT). A CHANCE OF RAIN EARLY IN THE EVENING. A SLIGHT CHANCE OF SHOWERS LATE. MIN TEMPERATURE.....AROUND 52. MAX HUMIDITY........78 PERCENT. WIND (20FT/2MIN)....SOUTH WINDS 6 TO 14 MPH. MIXING HEIGHT.......300-500 FT AGL. TRANSPORT WINDS.....SOUTH 9 TO 16 MPH...INCREASING TO 21 TO 29 MPH IN THE LATE EVENING AND OVERNIGHT. VENTILATION RATE....VERY POOR (2000-11500 FT-MPH). .FRIDAY... SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). A CHANCE OF SHOWERS IN THE MORNING. SHOWERS AND A CHANCE OF THUNDERSTORMS LATE IN THE MORNING...THEN A CHANCE OF SHOWERS LATE. MAX TEMPERATURE.....AROUND 71. MIN HUMIDITY........47 PERCENT. WIND (20FT/2MIN)....WEST WINDS 16 TO 20 MPH WITH GUSTS UP TO 40 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS LATE IN THE MORNING. MIXING HEIGHT.......700-2000 FT AGL...INCREASING TO 2800-4500 FT AGL EARLY IN THE AFTERNOON...THEN INCREASING TO 5500-6600 FT AGL LATE...DECREASING TO 4500 FT AGL LATE. TRANSPORT WINDS.....SOUTHWEST 32 TO 39 MPH...BECOMING WEST 43 TO 47 MPH IN THE AFTERNOON. VENTILATION RATE....VERY POOR TO GOOD (19200-60900 FT-MPH)...INCREASING TO GOOD TO EXCELLENT (93200-130000 FT-MPH) EARLY IN THE AFTERNOON...THEN INCREASING TO EXCELLENT (176900-224100 FT-MPH) EARLY IN THE AFTERNOON...INCREASING TO EXCELLENT (267400 FT-MPH) LATE...DECREASING TO EXCELLENT (179900 FT-MPH). FORECASTER...ZIMMERMAN REQUESTED BY...BOBBY CLONTZ TYPE OF REQUEST...PRESCRIBED .TAG 20110224.OWENR.01/AKQ