FNUS71 KAKQ 051630 FWSAKQ SPOT FORECAST FOR BLACKWATER UNIT D...US FISH AND WILDLIFE SERVICE (NWR) NATIONAL WEATHER SERVICE WAKEFIELD VA 1130 AM EST THU FEB 5 2009 FORECAST IS BASED ON IGNITION TIME OF 1230 EST ON FEBRUARY 05. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... ...VERY DRY THIS AFTERNOON WITH WIDESPREAD MINIMUM RELATIVE HUMIDITIES BELOW 30 PERCENT... HIGH PRESSURE BUILDS INTO THE REGION THIS AFTERNOON. THE HIGH WILL THEN SETTLE INTO THE SOUTHEAST STATES THROUGH THE WEEKEND...AS A DRY COLD FRONT APPROACHES THE MID ATLANTIC REGION FROM THE NORTHWEST ON SUNDAY. THE FRONT PUSHES OFF THE COAST SUNDAY NIGHT...AS HIGH PRESSURE BUILDS INTO THE AREA FROM THE NORTH ON MONDAY. .REST OF TODAY... SKY/WEATHER.........SUNNY (0-10 PERCENT). MAX TEMPERATURE.....AROUND 28. MIN HUMIDITY........40 PERCENT. WIND (20FT/2MIN)....NORTHWEST WINDS 12 TO 17 MPH. GUSTS UP TO 30 MPH. MIXING HEIGHT.......4300-4700 FT AGL. TRANSPORT WINDS.....NORTHWEST 20 TO 21 MPH. VENTILATION RATE....GOOD (73600-84700 FT-MPH). TIME (EST) 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P 11P SKY (%).........0 2 3 4 5 7 8 11 13 16 18 21 WEATHER COV..... WEATHER TYPE.... TEMP............25 25 26 26 26 25 23 21 21 20 19 19 RH..............45 44 44 42 44 47 52 52 56 59 59 59 20 FT WIND DIR..NW NW NW NW NW NW NW NW NW NW NW W 20 FT WIND SPD..15 14 14 12 11 8 6 4 3 2 1 1 20 FT WIND GUST.30 25 25 20 20 15 10 5 5 MIX HGT (KFT)...4.7 4.7 4.7 4.7 4.7 4.3 3.9 3.5 2.7 1.8 1.0 0.8 MIXNG WIND DIR..NW NW NW NW NW NW NW NW NW NW NW NW MIXNG WIND SPD..21 21 21 20 20 20 20 20 17 15 13 12 .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT). MIN TEMPERATURE.....AROUND 15. MAX HUMIDITY........62 PERCENT. WIND (20FT/2MIN)....NORTHWEST WINDS AROUND 7 MPH EARLY IN THE EVENING...BECOMING LIGHT AND VARIABLE. MIXING HEIGHT.......2700-3900 FT AGL...DECREASING TO 400-1800 FT AGL IN THE LATE EVENING AND OVERNIGHT. TRANSPORT WINDS.....NORTHWEST 12 TO 20 MPH...BECOMING WEST 7 TO 10 MPH AFTER MIDNIGHT. VENTILATION RATE....VERY POOR TO GOOD (23400-67300 FT-MPH)...DECREASING TO VERY POOR (2900-10500 FT-MPH) IN THE LATE EVENING AND OVERNIGHT. .FRIDAY... SKY/WEATHER.........SUNNY (15-25 PERCENT). MAX TEMPERATURE.....AROUND 39. MIN HUMIDITY........36 PERCENT. WIND (20FT/2MIN)....LIGHT AND VARIABLE WINDS...BECOMING SOUTH 6 TO 8 MPH IN THE LATE MORNING AND AFTERNOON. MIXING HEIGHT.......300-2200 FT AGL...INCREASING TO 1600-2500 FT AGL LATE IN THE MORNING. TRANSPORT WINDS.....SOUTH 5 TO 10 MPH. VENTILATION RATE....VERY POOR (1000-21800 FT-MPH). FORECASTER...GINGRICH REQUESTED BY...KEITH MORRIS TYPE OF REQUEST...PRESCRIBED .TAG 20090205.BLACK.01/AKQ