FNUS72 KJAX 101230 FWSJAX SPOT FORECAST FOR JENNINGS10...DOF NATIONAL WEATHER SERVICE JACKSONVILLE FL 830 AM EDT FRI APR 10 2009 FORECAST IS BASED ON IGNITION TIME OF 0900 EDT ON APRIL 10. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A HIGH PRESSURE RIDGE EXTENDING FROM SOUTH FLORIDA INTO THE WESTERN ATLANTIC WILL SHIFT EAST AS A COLD FRONT APPROACHES THE AREA THROUGH SATURDAY. THIS FRONT WILL MOVE SOUTH OF THE AREA SATURDAY NIGHT AS IT BECOMES DIFFUSE. WINDS WILL INCREASE FROM THE SOUTH TO SOUTHWEST AT AROUND 15 MPH AND GUSTY TODAY. RH VALUES MAY NEAR 35 PERCENT OVER PORTIONS OF INTERIOR NORTHEAST FLORIDA... BUT DURATIONS BELOW 35 PERCENT ARE EXPECTED TO BE LESS THAN 4 HOURS. DISPERSION LEVELS WILL BE HIGH...POSSIBLY JUST OVER 90 THIS AFTERNOON. FIRE WEATHER INTERESTS SHOULD MONITOR THE FORECAST TODAY FOR POSSIBLE UPDATES DUE TO THE MARGINAL NATURE OF THE FORECAST. HIGHER RH VALUES AND LIGHTER WINDS ARE EXPECTED ON SATURDAY ALONG WITH A CHANCE OF SHOWERS AND THUNDERSTORMS. .TODAY... SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING PARTLY SUNNY (35-45 PERCENT). MAX TEMPERATURE.....AROUND 82. MIN HUMIDITY........37 PERCENT. WIND (20 FT)........SOUTH WINDS 6 MPH EARLY IN THE MORNING... THEN BECOMING SOUTHWEST 5 TO 13 MPH WITH GUSTS TO AROUND 25 MPH IN THE LATE MORNING AND AFTERNOON. LAL.................1. MIXING HEIGHT.......700-1100 FT AGL INCREASING TO 2700-4300 FT AGL LATE IN THE MORNING AND AFTERNOON. MIXING WINDS........SOUTH 9 TO 14 MPH INCREASING TO SOUTHWEST 21 TO 24 MPH LATE IN THE MORNING. DISPERSION INDEX....92. CHANCE OF PCPN......0 PERCENT. TIME (EDT) 9 AM 11 AM 1 PM 3 PM 5 PM SKY (%).........86 62 60 35 35 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE TEMP............63 73 78 81 81 RH..............75 51 42 39 42 20 FT WIND......S 6 S 9 SSW 13 SW 13 SW 12 20 FT WIND GUST.10 15 21 25 21 MIX HGT (FT)....1100 2700 2700 4300 4500 TRANSPORT WIND..S 14 S 21 S 21 S 24 SW 24 CHC OF PCPN (%).0 0 0 0 5 LAL.............1 1 1 1 1 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING MOSTLY CLOUDY (50-60 PERCENT). MIN TEMPERATURE.....AROUND 62. MAX HUMIDITY........100 PERCENT. WIND (20 FT)........SOUTHWEST WINDS 5 TO 10 MPH BECOMING LIGHT. LAL.................1. MIXING HEIGHT.......3500 FT AGL DECREASING TO 400-1000 FT AGL LATE IN THE EVENING AND OVERNIGHT. MIXING WINDS........SOUTHWEST 16 TO 24 MPH DECREASING TO 14 TO 16 MPH LATE IN THE EVENING. DISPERSION INDEX....11. CHANCE OF PCPN......0 PERCENT. TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........36 42 42 46 50 52 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............79 74 70 68 66 65 RH..............45 55 67 77 87 92 20 FT WIND......SW 10 SW 8 SW 7 SW 7 SW 6 SW 5 20 FT WIND GUST.20 15 15 10 10 10 MIX HGT (FT)....3400 1600 1600 1000 400 400 TRANSPORT WIND..SW 24 SW 16 SW 16 SW 14 SW 16 SW 16 CHC OF PCPN (%).0 0 0 0 0 0 LAL.............1 1 1 1 1 1 .SATURDAY... SKY/WEATHER.........PARTLY CLOUDY (60-70 PERCENT). A CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....AROUND 83. MIN HUMIDITY........47 PERCENT. WIND (20 FT)........LIGHT WINDS BECOMING WEST 5 TO 12 MPH IN THE LATE MORNING AND AFTERNOON. LAL.................1 UNTIL 1400...THEN 3. MIXING HEIGHT.......800-1200 FT AGL INCREASING TO 4300-4500 FT AGL BY LATE MORNING AND EARLY AFTERNOON. MIXING WINDS........WEST 14 TO 22 MPH. DISPERSION INDEX....79. CHANCE OF PCPN......30 PERCENT. $$ FORECASTER...SHASHY REQUESTED BY...KEVIN MACEWEN TYPE OF REQUEST...PRESCRIBED .TAG 20090410.JENNI.01/JAX