FNUS71 KAKQ 211318 FWSAKQ SPOT FORECAST FOR SOUTH FARM FIELDS...USDA-US FOREST SERVICE (USFS) NATIONAL WEATHER SERVICE WAKEFIELD VA 818 AM EST SAT FEB 21 2009 FORECAST IS BASED ON IGNITION TIME OF 1100 EST ON FEBRUARY 21. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... ...LIGHTER WINDS TODAY... ...BECOMING DRY AND BREEZY SUNDAY... HIGH PRESSURE WILL MOVE OFF THE NORTH CAROLINA COAST THIS AFTERNOON. LOW PRESSURE WILL APPROACH FROM THE GREAT LAKES REGION THIS EVENING INTO SOUTHERN CANADA SUNDAY...WITH THE TRAILING COLD FRONT CROSSING THE REGION SUNDAY MORNING. ANOTHER PERIOD OF GUSTY WESTERLY WINDS IS POSSIBLE SUNDAY AFTERNOON AND EVENING. THESE WINDS...IN TANDEM WITH LOW RH VALUES AND DRYING FUELS MAY RESULT IN A PERIOD OF INCREASED FIRE DANGER SUNDAY AFTERNOON AND EVENING. .TODAY... SKY/WEATHER.........SUNNY (10-20 PERCENT). MAX TEMPERATURE.....AROUND 48. MIN HUMIDITY........32 PERCENT. WIND (20FT/2MIN)....NORTH WINDS 5 TO 7 MPH EARLY IN THE MORNING...BECOMING LIGHT AND VARIABLE...THEN BECOMING SOUTHEAST 5 TO 10 MPH IN THE AFTERNOON. MIXING HEIGHT.......1200 FT AGL...INCREASING TO 2600-3400 FT AGL IN THE LATE MORNING AND AFTERNOON. TRANSPORT WINDS.....NORTH 6 TO 10 MPH...BECOMING SOUTHEAST 7 TO 12 MPH IN THE AFTERNOON...THEN BECOMING SOUTH AROUND 15 MPH LATE. VENTILATION RATE....VERY POOR (5000-10000 FT-MPH)...BECOMING POOR (38600 FT-MPH). TIME (EST) 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P SKY (%).........8 11 15 18 21 24 27 31 34 41 48 55 WEATHER COV..... WEATHER TYPE.... TEMP............43 44 45 46 47 48 46 45 43 43 43 43 RH..............40 39 36 34 33 33 38 44 51 51 55 60 20 FT WIND DIR..E E SE SE SE SE SE SE SE S S S 20 FT WIND SPD..4 5 5 5 7 8 9 10 11 11 11 11 20 FT WIND GUST.5 10 10 12 13 14 16 18 18 18 MIX HGT (KFT)...2.5 3.0 3.0 3.3 3.4 3.4 3.0 2.6 2.2 1.9 1.6 1.3 MIXNG WIND DIR..N E SE SE SE S S S S S S S MIXNG WIND SPD..6 5 6 8 10 13 15 16 17 17 17 16 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT)...THEN BECOMING MOSTLY CLOUDY (65-75 PERCENT). A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. MIN TEMPERATURE.....AROUND 40. MAX HUMIDITY........86 PERCENT. WIND (20FT/2MIN)....SOUTH WINDS 11 TO 13 MPH. MIXING HEIGHT.......1300-2600 FT AGL...DECREASING TO 600 FT AGL LATE IN THE EVENING. TRANSPORT WINDS.....SOUTH 10 TO 17 MPH. VENTILATION RATE....POOR...BECOMING VERY POOR (2300-36900 FT-MPH). .SUNDAY... SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT)...THEN BECOMING MOSTLY SUNNY (35-45 PERCENT). A CHANCE OF SHOWERS IN THE MORNING. MAX TEMPERATURE.....AROUND 46. MIN HUMIDITY........48 PERCENT. WIND (20FT/2MIN)....BREEZY. WEST WINDS 13 TO 22 MPH WITH GUSTS UP TO 30 MPH...INCREASING TO 24 TO 26 MPH WITH GUSTS UP TO 40 MPH LATE. MIXING HEIGHT.......300-1300 FT AGL...INCREASING TO 6800-7300 FT AGL. TRANSPORT WINDS.....SOUTH 9 TO 15 MPH...INCREASING TO WEST 21 TO 28 MPH IN THE AFTERNOON. VENTILATION RATE....VERY POOR (2000-28800 FT-MPH)...INCREASING TO EXCELLENT (157300-160000 FT-MPH). FORECASTER...BROWN REQUESTED BY...JON BECK TYPE OF REQUEST...PRESCRIBED .TAG 20090221.SOUTH.01/AKQ