FNUS71 KAKQ 231123 FWSAKQ SPOT FORECAST FOR CHESAPEAKE...MD. FOREST SERVICE NATIONAL WEATHER SERVICE WAKEFIELD VA 723 AM EDT FRI APR 23 2010 FORECAST IS BASED ON IGNITION TIME OF 1100 EDT ON APRIL 20. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... A WEAK BACKDOOR FRONT WILL DROP SOUTH ACROSS THE CAROLINAS TODAY...THEN DISSIPATE. WEAK HIGH PRESSURE BUILDS INTO THE AREA FROM THE NORTH TODAY AND TONIGHT...WHILE A WARM FRONT SLOWLY APPROACHES FROM THE SOUTHWEST. ON SATURDAY...LOW PRESSURE MOVES INTO THE MID MISSISSIPPI VALLEY...AS THE WARM FRONT PUSHES INTO THE MID ATLANTIC REGION. THE LOW WILL MOVE INTO THE UPPER MIDWEST REGION BY SUNDAY MORNING...AS ANOTHER WARM FRONT EXTENDING EAST FROM THE LOW LIFTS INTO THE MID ATLANTIC REGION. THE WARM FRONT WILL LIFT NORTH OF THE AREA BY SUNDAY AFTERNOON...WHILE A COLD FRONT CROSSES THE AREA FROM THE WEST SUNDAY NIGHT. THE LOW WILL TRACK THROUGH THE NORTHERN MID ATLANTIC REGION ON MONDAY...AS ANOTHER COLD FRONT PUSHES THROUGH THE AREA. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). MAX TEMPERATURE.....AROUND 69. MIN HUMIDITY........30 PERCENT. WIND (20FT/2MIN)....NORTHEAST WINDS 5 TO 9 MPH. MIXING HEIGHT.......400-2200 FT AGL...INCREASING TO 4500-5300 FT AGL. TRANSPORT WINDS.....NORTHWEST 7 TO 16 MPH...INCREASING TO 17 TO 18 MPH LATE. VENTILATION RATE....VERY POOR TO FAIR (3300-52500 FT-MPH)...INCREASING TO GOOD (69800-79300 FT-MPH) EARLY IN THE AFTERNOON. TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY (%).........23 27 30 31 31 32 33 33 34 35 35 36 WEATHER COV..... WEATHER TYPE.... TEMP............52 52 55 58 61 64 66 67 68 68 68 68 RH..............80 77 69 59 51 45 40 37 34 33 32 32 20 FT WIND DIR..NW N N N N N N N N N N N 20 FT WIND SPD..5 6 7 6 6 6 6 6 7 5 4 3 20 FT WIND GUST.10 10 15 15 15 10 15 15 15 10 10 5 MIX HGT (KFT)...0.4 0.6 0.8 1.5 2.2 2.9 3.7 4.5 5.3 5.1 4.8 4.5 TRANSP WIND DIR.N N N N N N NW NW NW NW NW NW TRANSP WIND SPD.9 10 12 10 8 7 10 14 16 18 18 17 FORECASTER...ALEXANDER REQUESTED BY...DON KRONNER TYPE OF REQUEST...PRESCRIBED .TAG 20100420.CHESA.01/AKQ