FNUS72 KJAX 211027
FWSJAX

SPOT FORECAST FOR CECIL...DOF
NATIONAL WEATHER SERVICE JACKSONVILLE FL
527 AM EST WED JAN 21 2009

FORECAST IS BASED ON IGNITION TIME OF 0900 EST ON JANUARY 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 6 PM EST
THIS AFTERNOON...
...FIRE WEATHER WATCH IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY AFTERNOON...

.DISCUSSION...
COLD HIGH PRESSURE WILL BUILD INTO THE REGION TODAY AND KEEP VERY
DRY AIR IN PLACE. THERE WILL BE LONG DURATIONS OF CRITICALLY LOW
RH VALUES TODAY. HUMIDITIES WILL DROP BELOW 30 PERCENT BY NOON AND
BOTTOM OUT NEAR 20 PERCENT DURING THE AFTERNOON. WINDS WILL
REMAIN LESS THAN 15 MPH.

.TODAY...

SKY/WEATHER.........SUNNY (0-5 PERCENT).
MAX TEMPERATURE.....AROUND 47.
MIN HUMIDITY........21 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 6 TO 8 MPH.
MIXING HEIGHT.......400-1900 FT AGL INCREASING TO 1900-3300 FT AGL
                    IN THE AFTERNOON.
MIXING WINDS........NORTHWEST 10 TO 15 MPH.
DISPERSION INDEX....56.
CHANCE OF PCPN......0 PERCENT.

TIME (EST)      9 AM   11 AM  1 PM   3 PM   5 PM
SKY (%).........2      1      2      2      1
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE
TEMP............29     38     44     46     44
RH..............48     32     24     23     28
20 FT WIND......NW 8   NW 8   NW 8   NW 7   W 6
20 FT WIND GUST.15     15     15     10     10
MIX HGT (FT)....400    1900   3300   3300   1900
TRANSPORT WIND..NW 15  NW 15  NW 14  NW 14  NW 10
CHC OF PCPN (%).0      0      0      0      0

.TONIGHT...

SKY/WEATHER.........CLEAR (0-10 PERCENT). PATCHY FROST EARLY IN THE
                    MORNING.
MIN TEMPERATURE.....AROUND 20.
MAX HUMIDITY........74 PERCENT.
WIND (20 FT)........WEST WINDS AROUND 5 MPH EARLY IN THE EVENING
                    BECOMING LIGHT.
MIXING HEIGHT.......200-1900 FT AGL.
MIXING WINDS........NORTHWEST 3 TO 10 MPH.
DISPERSION INDEX....1.
CHANCE OF PCPN......0 PERCENT.

TIME (EST)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).........1      1      1      1      5      4
WEATHER COV.....                                   PATCHY
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   FROST
TEMP............39     31     27     25     23     22
RH..............36     51     62     67     70     71
20 FT WIND......W 5    W 2    W 2    NW 2   NW 1   NW 1
20 FT WIND GUST.10     10     5      5      5      5
MIX HGT (FT)....1900   400    300    300    200    300
TRANSPORT WIND..NW 10  NW 6   NW 3   NW 3   N 3    NW 3
CHC OF PCPN (%).0      0      0      0      0      0

.THURSDAY...

SKY/WEATHER.........SUNNY (0-5 PERCENT). PATCHY FROST EARLY IN THE
                    MORNING.
MAX TEMPERATURE.....AROUND 59.
MIN HUMIDITY........19 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHWEST 5 TO 6 MPH IN
                    THE AFTERNOON.
MIXING HEIGHT.......300-1900 FT AGL INCREASING TO 1900-3300 FT AGL
                    IN THE AFTERNOON.
MIXING WINDS........WEST 3 TO 8 MPH.
DISPERSION INDEX....31.

$$
FORECASTER...SHULER
REQUESTED BY...PAT DEREN
TYPE OF REQUEST...PRESCRIBED
.TAG 20090121.CECIL.01/JAX