FNUS72 KMFL 231211 FWSMFL SPOT FORECAST FOR LOST PRAIRIE RX NATIONAL WEATHER SERVICE MIAMI FL 811 AM EDT FRI APR 23 2010 IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER SERVICE. SPOT FORECAST FOR LOST PRAIRIE RX...BIG CYPRESS NATIONAL PRESERVE NATIONAL WEATHER SERVICE MIAMI FL 808 AM EDT FRI APR 23 2010 FORECAST IS BASED ON IGNITION TIME OF 1000 EDT ON APRIL 23. IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A RIDGE IF SURFACE HIGH PRESSURE WILL CONTINUE TO SHIFT SLOWLY EASTWARD AND AWAY FROM THE FLORIDA PENINSULA TODAY, RESULTING IN SLIGHTLY MORE PRONOUNCED SOUTHEASTERLY FLOW. THE LINGERING EFFECTS OF A DRY LOW-LEVEL AIR MASS WILL RESULT IN MINIMUM RELATIVE HUMIDITY VALUES DROPPING TO AROUND 35 PERCENT FOR A FEW HOURS THIS AFTERNOON IN THE VICINITY OF THE PRESCRIBED BURN SITE. SMOKE DISPERSION TO THE WEST-NORTHWEST SHOULD BE IN THE GENERALLY GOOD RANGE AS TRANSPORT LAYER FLOW WILL BE AROUND 10 KNOTS. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT). TEMPERATURE.........75 AT IGNITION...MAX 88. MIN HUMIDITY........64 PERCENT AT IGNITION...MIN 36 PERCENT. DEWPOINT............63. WIND (20 FT)........WINDS EAST AT 3 MPH AT IGNITION...OTHERWISE LIGHT WINDS BECOMING EAST 5 TO 8 MPH IN THE LATE MORNING AND AFTERNOON. WIND (EYE LEVEL)....LIGHT WINDS BECOMING EAST 5 TO 8 MPH IN THE LATE MORNING AND AFTERNOON. POP (12 HR).........0 PERCENT. LAL.................1. MIXING HEIGHT.......1600 FT AGL AT IGNITION...OTHERWISE 1600-3100 FT AGL INCREASING TO 4500 FT AGL IN THE AFTERNOON. MIXING WINDS........EAST 5 TO 10 MPH. DISPERSION INDEX....10 INCREASING TO 45. LVORI...............3. TIME (EDT) 10 AM NOON 2 PM 4 PM 6 PM 8 PM SKY (%).........35 35 35 35 35 40 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE 12 HR CHC PCPN. 0 0 0 0 0 10 TEMP............75 83 88 88 84 78 RH..............64 46 36 39 48 60 20 FT WIND......E 2 E 4 E 5 E 5 E 6 E 6 20 FT WIND GUST.5 10 10 10 10 10 EYE LEVEL WIND..E 2 E 4 E 5 E 5 E 6 E 6 EYE LVL WND GST.5 10 10 10 10 10 MIX HGT (FT)....1600 3100 4500 4500 4500 2600 MIXNG WIND......E 5 E 9 E 9 E 9 E 10 E 10 DISP IDX (LDSI).10 35 47 47 43 7 LVORI...........4 1 1 1 1 3 LAL.............1 1 1 1 1 1 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT). MIN TEMPERATURE.....63. MAX HUMIDITY........100 PERCENT. DEWPOINT............65. WIND (20 FT)........EAST WINDS 6 TO 8 MPH. WIND (EYE LEVEL)....EAST WINDS 6 TO 8 MPH. POP (12 HR).........10 PERCENT. LAL.................1. MIXING HEIGHT.......700-2600 FT AGL. MIXING WINDS........EAST 8 TO 10 MPH. DISPERSION INDEX....6. LVORI...............6. .SATURDAY... SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT). MAX TEMPERATURE.....88. MIN HUMIDITY........47 PERCENT. DEWPOINT............67. WIND (20 FT)........SOUTHEAST WINDS 7 TO 10 MPH. WIND (EYE LEVEL)....SOUTHEAST WINDS 7 TO 10 MPH. POP (12 HR).........10 PERCENT. LAL.................1. MIXING HEIGHT.......2000-3200 FT AGL INCREASING TO 4000-4500 FT AGL IN THE AFTERNOON. MIXING WINDS........SOUTHEAST 10 TO 15 MPH. DISPERSION INDEX....25 INCREASING TO 55. LVORI...............3. .FORECAST DAYS 3 THROUGH 5... .SUNDAY... PARTLY CLOUDY. LOWS IN THE MID 60S. HIGHS IN THE UPPER 80S. SOUTH WINDS AROUND 9 MPH. .MONDAY... MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S. HIGHS IN THE UPPER 80S. SOUTHWEST WINDS AROUND 8 MPH. .TUESDAY... PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S. HIGHS IN THE MID 80S. WEST WINDS AROUND 7 MPH. $$ FORECASTER...DIXON REQUESTED BY...MINDY WRIGHT TYPE OF REQUEST...PRESCRIBED $$ REQUESTED BY...MINDY WRIGHT REASON FOR REQUEST...UNDER THE INTERAGENCY AGREEMENT FOR METEOROLOGICAL SERVICES (USFS, BLM, NPS, U