FNUS72 KMFL 111355 FWSMFL SPOT FORECAST FOR MAILBOX TRUCK RX...FL. D.O.F. NATIONAL WEATHER SERVICE MIAMI FL 855 AM EST THU FEB 11 2010 FORECAST IS BASED ON IGNITION TIME OF 0900 EST ON FEBRUARY 11. IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER SERVICE. ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 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 25 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.........47 AT IGNITION...MAX 63. MIN HUMIDITY........57 PERCENT AT IGNITION...MIN 27 PERCENT. DEWPOINT............40. WIND (20 FT)........WINDS NORTH AT 6 MPH AT IGNITION...OTHERWISE NORTH WINDS 5 TO 7 MPH. WIND (EYE LEVEL)....NORTH WINDS 5 TO 7 MPH. POP (12 HR).................0 PERCENT. POP (12 HR).................0 PERCENT. LAL.................1. MIXING HEIGHT.......1300 FT AGL AT IGNITION...OTHERWISE 1300-2400 FT AGL. MIXING WINDS........NORTHEAST 10 TO 14 MPH. DISPERSION INDEX....27 INCREASING TO 32 IN THE AFTERNOON. LVORI...............2. TIME (EST) 9 AM 11 AM 1 PM 3 PM 5 PM 7 PM SKY (%).........20 20 20 20 20 23 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE 12 HR CHC PCPN. 0 0 0 0 0 10 6 HR CHC PCPN. 0 0 0 0 0 10 TEMP............47 55 61 63 59 53 RH..............57 41 32 27 44 69 20 FT WIND......N 5 N 5 N 5 N 5 N 4 NE 3 20 FT WIND GUST.10 10 10 10 5 5 EYE LEVEL WIND..N 5 N 5 N 5 N 5 N 4 NE 3 EYE LVL WIND G..10 10 10 10 5 5 MIX HGT (FT)....1300 1800 2400 2400 2200 1400 MIXNG WIND......N 14 N 13 N 12 N 12 NE 10 NE 9 DISP IDX (LDSI).23 30 35 35 29 4 LVORI...........3 2 1 1 2 4 LAL.............1 1 1 1 1 1 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING MOSTLY CLOUDY (65-75 PERCENT). MIN TEMPERATURE.....37. MAX HUMIDITY........99 PERCENT. DEWPOINT............43. WIND (20 FT)........LIGHT WINDS BECOMING EAST AROUND 5 MPH IN THE LATE EVENING AND OVERNIGHT. WIND (EYE LEVEL)....LIGHT WINDS BECOMING EAST AROUND 5 MPH IN THE LATE EVENING AND OVERNIGHT. POP (12 HR).................10 PERCENT. POP (12 HR).................10 PERCENT. LAL.................1. MIXING HEIGHT.......500-1400 FT AGL. MIXING WINDS........EAST 9 TO 13 MPH. DISPERSION INDEX....6. LVORI...............6. .FRIDAY... SKY/WEATHER.........CLOUDY (85-95 PERCENT). CHANCE OF RAIN SHOWERS IN THE MORNING...THEN RAIN SHOWERS IN THE AFTERNOON. MAX TEMPERATURE.....74. MIN HUMIDITY........54 PERCENT. DEWPOINT............57. WIND (20 FT)........SOUTHWEST WINDS 6 TO 14 MPH. WIND (EYE LEVEL)....SOUTHWEST WINDS 6 TO 14 MPH. POP (12 HR).................80 PERCENT. POP (12 HR).................80 PERCENT. LAL.................1. MIXING HEIGHT.......1300-3000 FT AGL. MIXING WINDS........SOUTHEAST 9 TO 14 MPH SHIFTING TO THE SOUTHWEST AROUND 20 MPH IN THE AFTERNOON. DISPERSION INDEX....16 INCREASING TO 46. LVORI...............3. .FORECAST DAYS 3 THROUGH 5... .SATURDAY... COOLER. MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE UPPER 40S. HIGHS IN THE MID 60S. NORTHWEST WINDS AROUND 10 MPH. .SUNDAY... PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS AROUND 60. NORTH WINDS AROUND 5 MPH. .PRESIDENTS DAY... WARMER. PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 70S. LIGHT WINDS. $$ FORECASTER...DIXON REQUESTED BY...JEFF CUMMINGS TYPE OF REQUEST...PRESCRIBED