FNUS72 KMFL 171311
FWSMFL

SPOT FORECAST FOR SIR UNIT 21...FDEP
NATIONAL WEATHER SERVICE MIAMI FL
811 AM EST TUE JAN 17 2012

FORECAST IS BASED ON IGNITION TIME OF 0825 EST ON JANUARY 17.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A RIDGE OF HIGH PRESSURE ACROSS NORTH FLORIDA WILL REMAIN NEARLY
STATIONARY TODAY. THIS WILL RESULT IN A MODERATE LOW LEVEL EAST TO
SOUTHEAST WIND FLOW. RELATIVE HUMIDITIES WILL REMAIN WELL ABOVE CRITICAL
THRESHOLDS THROUGH TODAY WITH MAXIMUM AFTERNOON DISPERSION VALUES IN THE
GENERALLY GOOD RANGE TODAY. THE RIDGE SHOULD MOVE SOUTH WEDNESDAY AS A
COLD FRONT MOVES INTO NORTH FLORIDA. SURFACE WINDS SHOULD BECOME SOUTH
TO SOUTHWEST ON WEDNESDAY. PATCHY FOG COULD DEVELOP TOWARD THE EARLY MORNING
HOURS ON WEDNESDAY.

.TODAY...

SKY/WEATHER.........PARTLY SUNNY.
MAX TEMPERATURE.....MAX 77.
MIN HUMIDITY........MIN 49 PERCENT.
WIND (20 FT)........SOUTH WINDS 5 TO 10 MPH.
MIXING HEIGHT.......500-1800 FT AGL INCREASING TO 3000-3500 FT AGL
                    IN THE LATE MORNING AND AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST 6 TO 15 MPH.
DISPERSION INDEX....3 INCREASING TO 16 EARLY IN THE MORNING...THEN
                    INCREASING TO 48 LATE IN THE MORNING DECREASING
                    TO 36 EARLY IN THE AFTERNOON DECREASING TO 18.
LVORI...............4.
CHANCE OF PCPN......10 PERCENT.

TIME (EST)      8 AM   10 AM  NOON   2 PM   4 PM   6 PM
SKY (%).........30     50     50     50     50     50
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
TSTM COV........
TEMP............63     71     77     77     76     73
RH..............81     64     51     50     56     64
20 FT WIND......E 4    E 7    SE 8   SE 8   S 6    S 6
20 FT WIND GUST.5      15     15     15     15     15
MIX HGT (FT)....1800   3000   3500   3500   3000   3000
MIXNG WIND......E 7    SE 15  SE 15  SE 10  SE 6   E 6
DISPERSION IDX..16     48     48     36     18     18
LVORI...........4      4      4      4      4      6
CHC OF PCPN (%).10     10     10     10     10     10

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY. PATCHY FOG EARLY IN THE MORNING.
MIN TEMPERATURE.....MIN 59.
MAX HUMIDITY........MAX 94 PERCENT.
WIND (20 FT)........SOUTH WINDS AROUND 9 MPH EARLY IN THE EVENING
                    BECOMING LIGHT.
MIXING HEIGHT.......1700-3000 FT AGL DECREASING TO 200-300 FT AGL
                    IN THE LATE EVENING AND OVERNIGHT.
TRANSPORT WINDS.....SOUTHEAST AROUND 6 MPH DECREASING TO 1 TO 3 MPH
                    UNTIL EARLY MORNING...THEN SHIFTING TO THE
                    NORTH AROUND 3 MPH EARLY IN THE MORNING.
DISPERSION INDEX....18 DECREASING TO 2.
LVORI...............6.
CHANCE OF PCPN......10 PERCENT.

.WEDNESDAY...

SKY/WEATHER.........PARTLY CLOUDY. PATCHY FOG EARLY IN THE MORNING.
MAX TEMPERATURE.....MAX 74.
MIN HUMIDITY........MIN 59 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING WEST 6 TO 8 MPH IN THE
                    AFTERNOON.
MIXING HEIGHT.......200-1500 FT AGL INCREASING TO 2700-3000 FT AGL
                    IN THE LATE MORNING AND AFTERNOON.
TRANSPORT WINDS.....NORTH AROUND 3 MPH SHIFTING TO THE SOUTHEAST
                    EARLY IN THE MORNING...THEN SHIFTING TO THE
                    WEST 7 TO 12 MPH IN THE LATE MORNING AND
                    AFTERNOON.
DISPERSION INDEX....4 INCREASING TO 37.
LVORI...............5.
CHANCE OF PCPN......10 PERCENT.

$$
FORECASTER...GARCIA
REQUESTED BY...GREG CURRY
TYPE OF REQUEST...PRESCRIBED
.TAG 20120117.SIRUN.01/MFL