FNUS72 KJAX 071325
FWSJAX

SPOT FORECAST FOR PERCHMAN...U.S. FOREST SERVICE
NATIONAL WEATHER SERVICE JACKSONVILLE FL
825 AM EST THU JAN 7 2010

FORECAST IS BASED ON IGNITION TIME OF 0840 EST ON JANUARY 07.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT UNTIL 6 PM EST THIS EVENING DUE TO
LOW RHS...

.DISCUSSION...DRY AIR COMBINED WITH WARMER TEMPERATURES TODAY WILL
PRODUCE CRITICALLY LOW RH VALUES IN THE LOW 20S THIS AFTERNOON.
WINDS WILL BE LESS THAN 15 MPH.

A COLD FRONT WILL MOVE THROUGH THE AREA TONIGHT BRINGING A CHANCE
OF RAIN AND SLEET TO GEORGIA LATE TONIGHT AND FRIDAY MORNING. STRONG
HIGH PRESSURE WILL BUILD INTO THE AREA OVER THE WEEKEND BRINGING
CRITICALLY LOW HUMIDITY AND BREEZY CONDITIONS. ADDITIONAL WATCHES
AND WARNINGS WILL LIKELY BE NEEDED SATURDAY THROUGH MONDAY.


.TODAY...

MAX TEMPERATURE.....AROUND 56.
MIN HUMIDITY........23 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHWEST 5 TO 6 MPH LATE
                    IN THE MORNING.
MIXING HEIGHT.......500-2400 FT AGL.
MIXING WINDS........SOUTHWEST 7 TO 9 MPH.
DISPERSION INDEX....24.

TIME (EST)      8 AM   10 AM  NOON   2 PM   4 PM
TEMP............30     44     52     54     54
RH..............66     40     28     26     32
20 FT WIND......NW 2   W 5    W 6    W 6    SW 5
20 FT WIND GUST.5             10     10
MIX HGT (FT)....600    1500   2400   2400   1600
TRANSPORT WIND..NW 9   NW 9   W 9    W 8    SW 7

.TONIGHT...

MAX HUMIDITY........80 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHWEST AROUND 5 MPH
                    AFTER MIDNIGHT...THEN BECOMING LIGHT EARLY IN
                    THE MORNING BECOMING SOUTH AROUND 5 MPH EARLY
                    IN THE MORNING.
MIXING HEIGHT.......300-1600 FT AGL.
MIXING WINDS........SOUTHWEST 5 TO 9 MPH.
DISPERSION INDEX....3.

TIME (EST)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
RH..............40     51     58     63     67     71
20 FT WIND......SW 3   SW 3   SW 3   SW 3   SW 5   S 3
20 FT WIND GUST.5      5      5      5             5
MIX HGT (FT)....1600   800    600    600    300    500
TRANSPORT WIND..SW 7   S 7    SW 5   SW 5   SW 5   SW 9

.FRIDAY...

MIN HUMIDITY........51 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 14 MPH SHIFTING TO THE
                    NORTH 12 TO 15 MPH IN THE AFTERNOON.
MIXING HEIGHT.......500-1900 FT AGL.
MIXING WINDS........SOUTH 9 TO 15 MPH SHIFTING TO THE NORTHWEST 17
                    TO 20 MPH IN THE AFTERNOON.
DISPERSION INDEX....37.

$$
FORECASTER...ENYEDI
REQUESTED BY...MARK PLOSKI
TYPE OF REQUEST...PRESCRIBED
.TAG 20100107.PERCH.02/JAX