FNUS72 KMFL 171355 FWSMFL SPOT FORECAST FOR HARNEY RIVER RX #2 NATIONAL WEATHER SERVICE MIAMI FL 855 AM EST SAT JAN 17 2009 IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER SERVICE. SPOT FORECAST FOR HARNEY RIVER 2...NATIONAL PARK SERVICE NATIONAL WEATHER SERVICE MIAMI FL 854 AM EST SAT JAN 17 2009 FORECAST IS BASED ON IGNITION TIME OF 1100 EST ON JANUARY 17. IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...LESS CLOUDINESS AND HIGHER AMOUNT OF SUNSHINE TODAY WILL LIKELY RESULT IN HIGHER AFTERNOON TEMPERATURES, WHICH COULD HAVE AN IMPACT ON RH VALUES. HOWEVER, THE LOW LEVEL FLOW IS EXPECTED TO SHIFT TO THE NE AND THIS MAY RESULT IN DEWPOINTS SLOWLY CLIMBING DURING THE AFTERNOON. MODERATE SFC AND TRANSPORT WINDS WILL RESULT IN GENERALLY GOOD DISPERSION INDICES TODAY WITH FAIR TO GENERALLY GOOD DISPERSION INDICES EXPECTED SUNDAY AS THE LOW LVL FLOW CONTINUES TO DECREASE IN SPEED. A COLD FRONT IS EXPECTED TO MOVE ACROSS SOUTH FLORIDA MONDAY WITH A SECOND FRONTAL PASSAGE ON TUESDAY. DRY AIR WILL THEN SPREAD SOUTH ACROSS THE AREA WITH RH VALUES SIGNIFICANTLY LOWER TUESDAY THROUGH FRIDAY. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT). BEGIN/END OF PCPN... MAX TEMPERATURE.....AROUND 72. MIN HUMIDITY........51 PERCENT. DEWPOINT............57. WIND (20 FT)........NORTHEAST WINDS 9 TO 13 MPH. EYE LEVEL WINDS.....NORTHEAST WINDS 9 TO 13 MPH. CHANCE OF PCPN......0. LAL.................1. MIXING HEIGHT.......1100-3000 FT AGL. MIXING WINDS........NORTHEAST 17 TO 21 MPH. DISPERSION INDEX....19 INCREASING TO 42. LVORI...............3. TIME (EST) 11 AM 1 PM 3 PM 5 PM 7 PM 9 PM SKY (%).........30 30 30 30 25 25 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE CHC OF PCPN (%).0 0 0 0 0 0 TEMP............62 68 71 69 62 58 RH..............67 51 55 61 67 69 20 FT WIND......NE 8 NE 9 NE 9 NE 10 NE 9 NE 9 20 FT WIND GUST.15 20 20 20 20 20 EYE LEVEL WIND..NE 8 NE 9 NE 9 NE 10 NE 9 NE 9 EYE LVL WIND G..15 20 20 20 20 20 MIX HGT (FT)....2700 3000 3000 2700 1700 1700 MIXNG WIND......NE 17 NE 18 NE 18 NE 18 NE 16 NE 16 DISP IDX (LDSI).41 43 43 43 19 19 LVORI...........3 1 1 1 3 3 LAL.............1 1 1 1 1 1 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT). BEGIN/END OF PCPN... MIN TEMPERATURE.....AROUND 49. MAX HUMIDITY........93 PERCENT. DEWPOINT............53. WIND (20 FT)........NORTHEAST WINDS 8 TO 13 MPH IN THE EVENING BECOMING LIGHT. EYE LEVEL WINDS.....NORTHEAST WINDS 8 TO 13 MPH IN THE EVENING BECOMING LIGHT. CHANCE OF PCPN......0 PERCENT. LAL.................1. MIXING HEIGHT.......1700-2700 FT AGL DECREASING TO 500-700 FT AGL IN THE LATE EVENING AND OVERNIGHT. MIXING WINDS........NORTHEAST 10 TO 18 MPH DECREASING TO 5 TO 6 MPH AFTER MIDNIGHT. DISPERSION INDEX....43 DECREASING TO 5. LVORI...............4. .SUNDAY... SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). BEGIN/END OF PCPN... MAX TEMPERATURE.....AROUND 76. MIN HUMIDITY........53 PERCENT. DEWPOINT............62. WIND (20 FT)........LIGHT WINDS BECOMING SOUTHEAST 5 TO 9 MPH. EYE LEVEL WINDS.....LIGHT WINDS BECOMING SOUTHEAST 5 TO 9 MPH. CHANCE OF PCPN......0 PERCENT. LAL.................1. MIXING HEIGHT.......500-1600 FT AGL INCREASING TO 2700-3000 FT AGL IN THE LATE MORNING AND AFTERNOON. MIXING WINDS........EAST 5 TO 12 MPH SHIFTING TO THE SOUTHEAST 13 TO 15 MPH IN THE AFTERNOON. DISPERSION INDEX....2 INCREASING TO 42. LVORI...............4. $$ FORECASTER...RADER REQUESTED BY...KAREN ROBERTS TYPE OF REQUEST...PRESCRIBED $$ REQUESTED BY...KAREN ROBERTS REASON FOR REQUEST...UNDER THE INTERAGENCY AGREEMENT FOR METEOROLOGICAL SERVICES (USFS, BLM, NPS, U