FNUS72 KJAX 252307
FWSJAX

SPOT FORECAST FOR GRESSMAN...FLORIDA HIGHWAY PATROL
NATIONAL WEATHER SERVICE JACKSONVILLE FL
607 PM EST FRI JAN 25 2013

FORECAST IS BASED ON IGNITION TIME OF 1820 EST ON JANUARY 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...


A COLD FRONT WILL APPROACH THE AREA TONIGHT AND EARLY SATURDAY AND
THEN PUSH INTO NORTHEAST FLORIDA SATURDAY EVENING. RELATIVE HUMIDITIES
ARE EXPECTED TO REMAIN ABOVE CRITICAL THRESHOLDS THIS WEEKEND. WINDS
REMAIN SOUTHWEST TO WEST TONIGHT AND THEN PREVAILING WESTERLY ON
SATURDAY. WINDS WILL TURN NORTHWEST SATURDAY EVENING AND THEN
NORTH SATURDAY NIGHT.

NOTE: WE PROVIDED FORECAST IN 1 HOURLY INCREMENTS FOR TONIGHT FOR
BETTER FORECAST INFORMATION. YOUR COMMENTS ARE APPRECIATED.


.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT).
MAX HUMIDITY........100 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 7 MPH.
MIXING HEIGHT.......1500-3000 FT AGL DECREASING TO 300-1000 FT AGL
                    LATE IN THE EVENING.
MIXING WINDS........WEST 7 TO 16 MPH DECREASING TO 3 TO 5 MPH LATE
                    IN THE NIGHT.
DISPERSION INDEX....48 DECREASING TO 6.
LVORI...............5.

TIME (EST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........52  64  66  68  68  67  67  66  63  60  57  57
WEATHER COV.....
WEATHER TYPE....
RH..............58  68  74  79  81  85  91  92  93  94  96  97
20 FT WIND DIR..SW  SW  SW  SW  SW  W   W   W   W   W   W   W
20 FT WIND SPD..7   6   6   6   6   6   6   6   6   6   5   5
20 FT WIND GUST.11  10  10  10  10  10  10  9   8   8   8   8
MIX HGT (KFT)...3.0 2.3 1.8 1.6 1.5 1.0 0.8 0.5 0.5 0.4 0.3 0.3
TRANSP WIND DIR.SW  SW  SW  W   W   W   W   W   W   W   W   W
TRANSP WIND SPD.15  15  16  16  15  15  14  12  9   7   5   3
LVORI...........1   3   3   3   4   4   6   6   6   7   8   8
DISPERSION INDX.51  44  37  34  31  8   7   6   5   4   3   3

.SATURDAY...

SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT).
MIN HUMIDITY........50 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 9 MPH.
MIXING HEIGHT.......100-1400 FT AGL INCREASING TO 2300-3700 FT AGL
                    LATE IN THE MORNING.
MIXING WINDS........WEST 3 TO 8 MPH INCREASING TO 9 TO 16 MPH IN
                    THE LATE MORNING AND AFTERNOON.
DISPERSION INDEX....7 INCREASING TO 29 LATE IN THE MORNING...THEN
                    INCREASING TO 52 THEN DECREASING TO 29 BY LATE
                    AFTERNOON.
LVORI...............5.

TIME (EST)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
SKY (%).........57     46     47     45     54     60
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
RH..............97     100    77     57     50     51
20 FT WIND......W 5    W 5    W 7    W 8    W 9    W 8
20 FT WIND GUST.10     10     10     15     15     10
MIX HGT (FT)....200    100    1400   3000   3700   3600
TRANSPORT WIND..W 3    W 8    W 16   W 15   W 13   W 10
LVORI...........8      8      3      1      1      1
DISPERSION INDX.3      7      29     56     45     31

$$
FORECASTER...SHASHY
REQUESTED BY...LT  J  ASBURY
TYPE OF REQUEST...PRESCRIBED
.TAG 20130125.GRESS.01/JAX