FNUS72 KMFL 111538 FWSMFL SPOT FORECAST FOR S-130 190 RX...DOI / NPS EVERGLADES NATIONAL WEATHER SERVICE MIAMI FL 1038 AM EST THU FEB 11 2010 FORECAST IS BASED ON IGNITION TIME OF 1300 EST ON FEBRUARY 11. IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER SERVICE. ...RED FLAG WARNING IN EFFECT UNTIL 6 PM EST THIS EVENING... .DISCUSSION...A RIDGE OF SURFACE HIGH PRESSURE CENTERED ACROSS THE MISSISSIPPI VALLEY WILL CONTINUE TO IMPACT THE WEATHER ACROSS SOUTH FLORIDA TODAY...WITH LIGHT NORTHWEST WINDS MAINTAINING A COOL AND DRY AIR MASS OVER THE REGION. RELATIVE HUMIDITY VALUES WILL FALL RAPIDLY ONCE AGAIN TODAY...AS A WARMING TREND OCCURS THROUGH LATE AFTERNOON...WITH VALUES EXPECTED TO FALL TO AROUND 35 PERCENT IN THE VICINITY OF THE BURN SITE. COOL TEMPERATURES WILL LEAD TO MIXING HEIGHTS NO HIGHER THAN 2400 FEET...WITH NORTHERLY TRANSPORT LAYER WINDS ALLOWING FOR SMOKE DISPERSION TO THE SOUTH. DISPERSION INDICES WILL BE POOR TO FAIR...GIVEN LIGHT WINDS IN THE MIXING LAYER. WITH A DRY AIR MASS EXPECTED TO REMAIN IN PLACE ACROSS SOUTH FLORIDA OVERNIGHT...THE POTENTIAL FOR NOCTURNAL FOG DEVELOPMENT IS LOW. .TODAY... SKY/WEATHER.........SUNNY (15-25 PERCENT). TEMPERATURE.........64 AT IGNITION...MAX 65. MIN HUMIDITY........36 PERCENT AT IGNITION...MIN 34 PERCENT. DEWPOINT............40. WIND (20 FT)........WINDS NORTH AT 7 MPH AT IGNITION...OTHERWISE NORTH WINDS 7 TO 14 MPH. WIND (EYE LEVEL)....NORTH WINDS 7 TO 14 MPH. POP (12 HR).................0 PERCENT. POP (12 HR).................0 PERCENT. LAL.................1. MIXING HEIGHT.......2400 FT AGL AT IGNITION...OTHERWISE 1500-2400 FT AGL. MIXING WINDS........NORTHEAST 9 TO 16 MPH. DISPERSION INDEX....31. LVORI...............2. TIME (EST) 1 PM 3 PM 5 PM 7 PM 9 PM 11 PM SKY (%).........20 20 20 23 34 46 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE 12 HR CHC PCPN. 0 0 0 10 10 10 6 HR CHC PCPN. 0 0 0 10 10 10 TEMP............64 65 63 59 54 51 RH..............36 36 42 53 65 71 20 FT WIND......N 6 N 6 N 5 NE 5 NE 5 NE 5 20 FT WIND GUST.10 10 10 10 10 10 EYE LEVEL WIND..N 6 N 6 N 5 NE 5 NE 5 NE 5 EYE LVL WIND G..10 10 10 10 10 10 MIX HGT (FT)....2400 2400 2400 1600 1600 700 MIXNG WIND......N 10 N 10 NE 9 NE 10 NE 10 E 12 DISP IDX (LDSI).29 29 28 7 7 10 LVORI...........2 2 2 3 3 3 LAL.............1 1 1 1 1 1 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING MOSTLY CLOUDY (65-75 PERCENT). MIN TEMPERATURE.....49. MAX HUMIDITY........82 PERCENT. DEWPOINT............46. WIND (20 FT)........EAST WINDS 6 TO 7 MPH. WIND (EYE LEVEL)....EAST WINDS 6 TO 7 MPH. POP (12 HR).................10 PERCENT. POP (12 HR).................10 PERCENT. LAL.................1. MIXING HEIGHT.......700-1600 FT AGL. MIXING WINDS........SOUTHEAST 10 TO 13 MPH. DISPERSION INDEX....9. LVORI...............4. .FRIDAY... SKY/WEATHER.........CLOUDY (85-95 PERCENT). RAIN SHOWERS LIKELY IN THE AFTERNOON. MAX TEMPERATURE.....74. MIN HUMIDITY........60 PERCENT. DEWPOINT............60. WIND (20 FT)........SOUTHEAST WINDS 7 TO 13 MPH INCREASING TO SOUTHWEST 20 TO 23 MPH WITH GUSTS TO AROUND 35 MPH IN THE AFTERNOON. WIND (EYE LEVEL)....SOUTHEAST WINDS 7 TO 13 MPH INCREASING TO SOUTHWEST 20 TO 23 MPH IN THE AFTERNOON. POP (12 HR).................60 PERCENT. POP (12 HR).................60 PERCENT. LAL.................1. MIXING HEIGHT.......1500-3000 FT AGL. MIXING WINDS........SOUTH 13 TO 20 MPH INCREASING TO SOUTHWEST 28 TO 32 MPH IN THE AFTERNOON. DISPERSION INDEX....24 INCREASING TO 70. LVORI...............2. .FORECAST DAYS 3 THROUGH 5... .SATURDAY... MOSTLY CLOUDY. SHOWERS LIKELY. LOWS IN THE MID 40S. HIGHS IN THE MID 60S. NORTHWEST WINDS AROUND 17 MPH. .SUNDAY... PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS AROUND 70. NORTH WINDS AROUND 9 MPH. .PRESIDENTS DAY... PARTLY CLOUDY. LOWS IN THE LOWER 40S. HIGHS IN THE MID 70S. NORTHWEST WINDS AROUND 7 MPH. $$ FORECASTER...DIXON REQUESTED BY...ANDREW GILL TYPE OF REQUEST...PRESCRIBED