FNUS71 KAKQ 241236 FWSAKQ SPOT FORECAST FOR WILNA 12...US FISH AND WILDLIFE SERVICE NATIONAL WEATHER SERVICE WAKEFIELD VA 736 AM EST TUE FEB 24 2009 FORECAST IS BASED ON IGNITION TIME OF 1030 EST ON FEBRUARY 24. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... ...MINIMUM RELATIVE HUMIDITY VALUES WILL BOTTOM OUT NEAR 20 PERCENT THIS AFTERNOON... GUSTY NORTHWEST WINDS EARLY TODAY...ESPECIALLY NEAR THE COAST...WILL DIMINISH TODAY...AS HIGH PRESSURE FROM THE WEST BUILDS INTO THE MID ATLANTIC REGION. THE HIGH GRADUALLY PUSHES OFF THE COAST WEDNESDAY AND THURSDAY. A COLD FRONT APPROACHES FROM THE WEST ON FRIDAY...THEN STALLS OFF THE MID ATLANTIC COAST FRIDAY NIGHT AND SATURDAY. LOW PRESSURE MAY FORM ALONG THE FRONT NEAR THE SOUTHEAST REGION ON SATURDAY. .TODAY... SKY/WEATHER.........SUNNY (0-10 PERCENT). MAX TEMPERATURE.....AROUND 42. MIN HUMIDITY........21 PERCENT. WIND (20FT/2MIN)....NORTHWEST WINDS 6 TO 11 MPH. MIXING HEIGHT.......2500-4300 FT AGL...INCREASING TO 3100-4700 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....NORTHWEST 13 TO 20 MPH...DECREASING TO AROUND 9 MPH LATE. VENTILATION RATE....VERY POOR TO FAIR (24400-52000 FT-MPH). TIME (EST) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM SKY (%).........1 2 2 3 5 6 7 9 10 11 11 12 WEATHER COV..... WEATHER TYPE.... TEMP............37 39 42 42 42 42 42 38 33 29 27 26 RH..............32 28 25 22 22 22 26 31 39 42 44 47 20 FT WIND DIR..NW NW NW NW NW NW NW NW NW W SW S 20 FT WIND SPD..10 9 8 7 7 6 6 5 4 2 3 3 20 FT WIND GUST.15 15 15 10 10 10 10 10 5 5 5 MIX HGT (KFT)...3.9 4.3 4.7 4.7 4.6 4.5 4.5 3.1 1.7 0.3 0.3 0.3 MIXNG WIND DIR..NW NW NW NW NW NW NW NW NW W SW S MIXNG WIND SPD..16 15 14 13 13 13 13 9 7 3 3 3 .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT). MIN TEMPERATURE.....AROUND 17. MAX HUMIDITY........62 PERCENT. WIND (20FT/2MIN)....LIGHT AND VARIABLE WINDS. MIXING HEIGHT.......300-1700 FT AGL. TRANSPORT WINDS.....NORTHWEST 3 TO 7 MPH...BECOMING SOUTH 2 TO 3 MPH IN THE LATE EVENING AND OVERNIGHT. VENTILATION RATE....VERY POOR (500-9900 FT-MPH). .WEDNESDAY... SKY/WEATHER.........SUNNY (15-25 PERCENT). MAX TEMPERATURE.....AROUND 51. MIN HUMIDITY........22 PERCENT. WIND (20FT/2MIN)....LIGHT AND VARIABLE WINDS...BECOMING SOUTH 5 TO 6 MPH IN THE LATE MORNING AND AFTERNOON. MIXING HEIGHT.......300-1900 FT AGL...INCREASING TO 2800-4300 FT AGL IN THE LATE MORNING AND AFTERNOON. TRANSPORT WINDS.....SOUTH 3 TO 12 MPH. VENTILATION RATE....VERY POOR TO POOR (800-43100 FT-MPH). FORECASTER...HURLEY REQUESTED BY...KYLE KRZYWICKI TYPE OF REQUEST...PRESCRIBED .TAG 20090224.WILNA.01/AKQ