FNUS72 KJAX 211417
FWSJAX

SPOT FORECAST FOR YELLOW WATER...DOF
NATIONAL WEATHER SERVICE JACKSONVILLE FL
917 AM EST MON DEC 21 2009

FORECAST IS BASED ON IGNITION TIME OF 1000 EST ON DECEMBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
HIGH PRESSURE WILL WILL SETTLE OVER THE FORECAST AREA TODAY AND TUESDAY.
HIGH PRESSURE WILL MOVE EAST OF THE REGION WEDNESDAY AS THE NEXT FRONTAL
SYSTEM PUSHES INTO THE FORECAST AREA WITH THE NEXT CHANCE OF RAIN ON
THURSDAY AND FRIDAY. HIGH PRESSURE AND DRY WEATHER WILL MOVE BACK INTO
THE REGION OVER THE WEEKEND.

A RED FLAG WARNING HAS BEEN POSTED FOR MOST OF INLAND NORTHEAST FLORIDA
THIS AFTERNOON AS MIN RH VALUES FALL INTO THE 25 TO 35 PERCENT RANGE AND
DURATIONS OF CRITICAL RH'S OF UP TO 4 TO 5 HOURS WILL BE POSSIBLE.
SUSTAINED WINDS WILL BE LESS THAN 10 MPH.

A FIRE WEATHER WATCH HAS BEEN POSTED FOR MOST OF INLAND NORTHEAST FLORIDA
TUESDAY AFTERNOON AS MIN RH VALUES FALL INTO THE 25 TO 35 PERCENT RANGE AND
DURATIONS OF CRITICAL RH'S OF UP TO 4 TO 6 HOURS WILL BE POSSIBLE.
SUSTAINED WINDS WILL BE LESS THAN 10 MPH.

RED FLAG CONDITIONS ARE NOT EXPECTED FROM WEDNESDAY THROUGH FRIDAY. DRIER
AIR FILTERING INTO THE REGION NEXT WEEKEND MAY BRING CONDITIONS CLOSE TO
RED FLAGS ONCE AGAIN. SUSTAINED WINDS WILL BE LESS THAN 15 MPH ON WEDNESDAY...
THEN WILL INCREASE TO AROUND 15 MPH AND GUSTY IN ASSOCIATION WITH THE NEXT
FRONTAL SYSTEM ON THURSDAY AND FRIDAY WITH CONTINUED GUSTY NORTHWEST FLOW
NEXT WEEKEND AS WELL.

.TODAY...

SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT). PATCHY FROST
                    EARLY IN THE MORNING.
MAX TEMPERATURE.....AROUND 58.
MIN HUMIDITY........34 PERCENT.
WIND (20 FT)........NORTHWEST 5 TO 8 MPH.
MIXING HEIGHT.......400-2200 FT AGL.
MIXING WINDS........NORTHWEST 7 TO 13 MPH.
DISPERSION INDEX....32.

TIME (EST)      10 AM  NOON   2 PM   4 PM
SKY (%).........60     60     60     60
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE
TEMP............44     53     55     55
RH..............57     41     36     37
20 FT WIND......NW 7   NW 8   NW 8   NW 8
20 FT WIND GUST.10     15     15     10
MIX HGT (FT)....1400   1400   2200   2100
TRANSPORT WIND..NW 13  NW 13  NW 12  NW 10

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (30-40 PERCENT). AREAS OF FROST
                    EARLY IN THE MORNING.
MIN TEMPERATURE.....AROUND 33.
MAX HUMIDITY........88 PERCENT.
WIND (20 FT)........WEST WINDS AROUND 5 MPH EARLY IN THE EVENING
                    BECOMING LIGHT.
MIXING HEIGHT.......300-2100 FT AGL.
MIXING WINDS........NORTHWEST 3 TO 10 MPH.
DISPERSION INDEX....2.

TIME (EST)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).........60     46     46     46     24     24
WEATHER COV.....                                   AREAS
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   FROST
TEMP............47     42     39     38     36     35
RH..............53     67     75     78     82     85
20 FT WIND......W 5    W 2    W 3    W 2    W 2    NW 2
20 FT WIND GUST.       5      5      5      5      5
MIX HGT (FT)....2100   800    300    300    300    300
TRANSPORT WIND..NW 10  NW 8   W 5    W 5    W 3    NW 6

$$
FORECASTER...WOLF
REQUESTED BY...PAT DEREN
TYPE OF REQUEST...PRESCRIBED
.TAG 20091221.YELLO.01/JAX