FNUS72 KJAX 201114
FWSJAX

SPOT FORECAST FOR CECIL...DOF
NATIONAL WEATHER SERVICE JACKSONVILLE FL
614 AM EST FRI FEB 20 2009

FORECAST IS BASED ON IGNITION TIME OF 0930 EST ON FEBRUARY 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT FROM 10 AM THIS MORNING TO 7 PM EST
THIS EVENING DUE TO LOW RH...
...FIRE WEATHER WATCH IN EFFECT SATURDAY AFTERNOON DUE TO LOW RH...

.DISCUSSION...HIGH PRESSURE WILL BUILD INTO THE AREA BRINGING
IN A VERY DRY AIRMASS. RED FLAG CONDITIONS ARE EXPECTED ACROSS
ALL OF NORTHEAST FLORIDA AS RH'S FALL WELL BELOW CRITICAL VALUES.
THE DRY AIRMASS WILL LINGER INTO SATURDAY ESPECIALLY ACROSS THE
INLAND AREAS AND A FIRE WEATHER WATCH HAS BEEN ISSUED.

.TODAY...

SKY/WEATHER.........SUNNY (0-10 PERCENT).
TEMPERATURE.........46 AT IGNITION...MAX 56.
RH..................38 PERCENT AT IGNITION...MIN 18 PERCENT.
WIND (20 FT)........WINDS NORTH AT 9 MPH AT IGNITION...OTHERWISE
                    NORTHWEST WINDS 6 TO 9 MPH. GUSTS UP TO 20 MPH
                    EARLY IN THE AFTERNOON.
MIXING HEIGHT.......2300 FT AGL AT IGNITION...INCREASING TO 3500 FT AGL IN THE
                    AFTERNOON.
MIXING WINDS........NORTH 10 TO 16 MPH.
DISPERSION INDEX....57.

TIME (EST)      9 AM   11 AM  1 PM   3 PM   5 PM
SKY (%).........4      0      0      0      0
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE
TEMP............46     52     55     55     53
RH..............38     26     20     22     30
20 FT WIND......N 9    NW 9   NW 8   NW 8   NW 6
20 FT WIND GUST.15     15     20     15     10
MIX HGT (FT)....2300   2300   3500   3500   2200
TRANSPORT WIND..N 16   N 16   NW 14  N 14   N 10

.TONIGHT...

SKY/WEATHER.........CLEAR (0-10 PERCENT). PATCHY FROST EARLY IN THE
                    MORNING.
TEMPERATURE.........MIN 29.
RH..................MAX 63 PERCENT.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........NORTH 2 MPH.
DISPERSION INDEX....1.

TIME (EST)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).........0      0      0      0      8      5
WEATHER COV.....                                   PATCHY
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   FROST
TEMP............49     41     38     36     34     32
RH..............30     42     48     53     57     59
20 FT WIND......NW 3   NW 2   NW 2   NW 1   N 1    N 2
20 FT WIND GUST.5      5      5      5      5      5
MIX HGT (FT)....2200   800    500    500    300    300
TRANSPORT WIND..N 10   N 6    N 3    N 3    N 2    N 6

.SATURDAY...

SKY/WEATHER.........SUNNY (5-15 PERCENT). PATCHY FROST EARLY IN THE
                    MORNING.
TEMPERATURE.........MAX 67.
RH..................MIN 25 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHEAST 5 TO 8 MPH IN
                    THE LATE MORNING AND AFTERNOON.
MIXING HEIGHT.......300-400 FT AGL INCREASING TO 2400-4300 FT AGL
                    IN THE LATE MORNING AND AFTERNOON.
MIXING WINDS........SOUTH 6 TO 12 MPH.
DISPERSION INDEX....60.

$$
FORECASTER...PETERSON
REQUESTED BY...PAT DEREN
TYPE OF REQUEST...PRESCRIBED
.TAG 20090220.CECIL.01/JAX