FNUS72 KJAX 211139
FWSJAX

SPOT FORECAST FOR HUTTO SPRINGS...USDA - FOREST SERVICE
NATIONAL WEATHER SERVICE JACKSONVILLE FL
739 AM EDT TUE APR 21 2009

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

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 PM EDT THIS
EVENING...
...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...

.DISCUSSION...RELATIVE HUMIDITY LEVELS ARE EXPECTED TO DROP TO CRITICAL
VALUES THIS AFTERNOON IN WAKE OF A COLD FRONTAL PASSAGE. WEST WINDS WILL
BE GUSTY AT 15 TO 20 MPH. CRITICALLY LOW RH VALUES WILL AGAIN OCCUR OVER
THE AREA WEDNESDAY AFTERNOON. DISPERSION VALUES ARE CURRENTLY FORECAST
TO BE UP NEAR 100 ON WEDNESDAY.

RH VALUES WILL BE NEAR CRITICAL VALUES OVER INLAND NE FL ON THURSDAY AND
FRIDAY. WINDS WILL BE 15 MPH OR LESS.


.TODAY...

SKY/WEATHER.........SUNNY (10-20 PERCENT). SOME PATCHY FOG POSSIBLE EARLY
                    THIS MORNING.
MAX TEMPERATURE.....AROUND 80.
MIN HUMIDITY........26 PERCENT.
WIND (20 FT)........LIGHT WESTERLY WINDS BECOMING WEST 13 TO 16 MPH.
LAL.................1.
MIXING HEIGHT.......700-1100 FT AGL INCREASING TO 6100-6500 FT AGL.
MIXING WINDS........NORTHWEST 7 TO 15 MPH SHIFTING TO THE WEST
                    AROUND 20 MPH EARLY IN THE AFTERNOON.
DISPERSION INDEX....65.
CHANCE OF PCPN......0 PERCENT.

TIME (EDT)       9 AM   11 AM  1 PM   3 PM   5 PM
SKY (%)..........10     12     12     12     10
WEATHER COV......
WEATHER TYPE.....NONE   NONE   NONE   NONE   NONE
TEMP.............63     72     76     78     78
RH...............71     45     31     29     32
20 FT WIND.......W 6    W 10   W 14   W 15   W 14
20 FT WIND GUST..10     15     20     25     20
MIX HGT (FT).....1100   3600   3800   6100   6200
TRANSPORT WIND...NW 9   NW 15  NW 15  W 20   W 20
CHC OF PCPN (%)..0      0      0      0      0
LAL..............1      1      1      1      1

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....AROUND 50.
MAX HUMIDITY........89 PERCENT.
WIND (20 FT)........WEST WINDS 7 TO 13 MPH.
LAL.................1.
MIXING HEIGHT.......6100 FT AGL DECREASING TO 500-1200 FT AGL
                    IN THE EVENING.
MIXING WINDS........WEST 12 TO 20 MPH DECREASING TO AROUND 10 MPH
                    EARLY IN THE MORNING.
DISPERSION INDEX....8.
CHANCE OF PCPN......10 PERCENT.

TIME (EDT)       6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%)..........10     16     16     26     28     28
WEATHER COV......
WEATHER TYPE.....NONE   NONE   NONE   NONE   NONE   NONE
TEMP.............75     68     62     59     56     54
RH...............36     50     63     72     81     85
20 FT WIND.......W 13   SW 12  SW 10  SW 10  SW 9   W 8
20 FT WIND GUST..20     20     15     15     15     14
MIX HGT (FT).....6200   1200   1200   800    500    500
TRANSPORT WIND...W 20   SW 18  SW 18  SW 15  W 12   W 12
CHC OF PCPN (%)..0      10     10     10     10     10
LAL..............1      1      1      1      1      1

.WEDNESDAY...

SKY/WEATHER.........SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....AROUND 80.
MIN HUMIDITY........21 PERCENT.
WIND (20 FT)........WEST WINDS 7 TO 14 MPH.
LAL.................1.
MIXING HEIGHT.......800-1100 FT AGL INCREASING TO 3600 FT AGL LATE
                    IN THE MORNING...THEN INCREASING TO 6100 FT AGL
                    IN THE AFTERNOON.
MIXING WINDS........NORTHWEST 10 TO 18 MPH SHIFTING TO THE WEST 18
                    TO 23 MPH EARLY IN THE AFTERNOON.
DISPERSION INDEX....104.
CHANCE OF PCPN......0 PERCENT.

$$
FORECASTER...SHASHY
REQUESTED BY...WAYNE BURNS
TYPE OF REQUEST...PRESCRIBED
.TAG 20090421.HUTTO.01/JAX