FNUS72 KFFC 272141
FWSFFC

SPOT FORECAST FOR TRAIL RIDGE PLANNING...US FOREST SERVICE
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
541 PM EDT WED MAR 27 2013

FORECAST IS BASED ON IGNITION TIME OF 1030 EDT ON MARCH 28.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

SITE SPECIFIC DISCUSSION...
NOT EXPECTING AS LOW OF RH VALUES AS THE REMAINDER OF NORTH AND
CENTRAL GEORGIA FOR AREAS IN AND AROUND THE BURN ON THURSDAY.
MINIMUM RH SHOULD BOTTOM OUT AROUND 30 PERCENT. GENERALLY
EXPECTING LIGHT WINDS BUT GIVEN THE ELEVATION OF THE BURN AND THE
ASPECT AND EXPOSURE...WOULD NOT BE SURPRISED TO SEE SLIGHTLY
ELEVATED VALUES IN THE AFTERNOON OF 10 TO 15 MPH OUT OF THE NW WITH
GUSTS TO 20 MPH. IF WINDS DO REACH THIS THRESHOLD...SOME ADDITIONAL
MIXING WOULD BE PRESENT DRIVING RH VALUES INTO THE UPPER 20S.
PLEASE CALL WITH ANY QUESTIONS.

.THURSDAY...

SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT).
MAX TEMPERATURE.....AROUND 53.
MIN HUMIDITY........28 TO 30 PERCENT.
WIND (20 FT)........NORTHWEST WINDS AROUND 6 MPH EARLY IN THE
                    MORNING BECOMING NORTHWEST 10 MPH WITH
                    GUSTS TO AROUND 20 MPH IN THE LATE MORNING
                    AND AFTERNOON.
CWR.................0 PERCENT.
LAL.................1.
MIXING HEIGHT.......0-200 FT AGL INCREASING TO 3600-4400 FT AGL
                    LATE IN THE MORNING.
TRANSPORT WINDS.....NORTHWEST 6 TO 15 MPH INCREASING TO 15 TO 18
                    MPH LATE IN THE MORNING.
DISPERSION INDEX....INCREASING TO 61.
LVORI...............3.

TIME (EDT)      10 AM  NOON   2 PM   4 PM
SKY (%).........42     38     35     32
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE
TEMP............36     44     50     53
RH..............61     44     33     30
20 FT WIND......NW 5   NW 6   NW 14  NW 10
20 FT WIND GUST.       10     15     20
DISPERSION IDX..14     63     59     61
LVORI...........2      1      1      1
CWR.............0      0      0      0

.THURSDAY NIGHT...

SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).
MIN TEMPERATURE.....AROUND 32.
MAX HUMIDITY........81 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 9 MPH EARLY IN THE EVENING
                    BECOMING LIGHT.
CWR.................10 PERCENT.
LAL.................1.
MIXING HEIGHT.......4300 FT AGL DECREASING TO 0-100 FT AGL EARLY IN
                    THE EVENING.
TRANSPORT WINDS.....NORTH 5 TO 14 MPH.
DISPERSION INDEX....49 DECREASING TO 4.
LVORI...............3.

.FRIDAY...

SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT). SLIGHT CHANCE OF
                    RAIN SHOWERS EARLY IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 59.
MIN HUMIDITY........34 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING WEST 5 TO 7 MPH LATE IN
                    THE MORNING.
CWR.................10 PERCENT INCREASING TO 20 PERCENT EARLY IN
                    THE AFTERNOON.
LAL.................1.
MIXING HEIGHT.......0 FT AGL INCREASING TO 4400-4900 FT AGL LATE IN
                    THE MORNING.
TRANSPORT WINDS.....NORTHWEST 5 TO 14 MPH.
DISPERSION INDEX....5 INCREASING TO 48 LATE IN THE MORNING...THEN
                    DECREASING TO 37 LATE IN THE AFTERNOON.
LVORI...............3.

$$
FORECASTER...DEESE
REQUESTED BY...DAVE MARTIN
TYPE OF REQUEST...PRESCRIBED
.TAG 20130328.TRAIL.01/FFC