FNUS72 KCHS 211147
FWSCHS

SPOT FORECAST FOR C-85A 93...USDA FOREST SERVICE
NATIONAL WEATHER SERVICE CHARLESTON SC
747 AM EDT TUE APR 21 2009

FORECAST IS BASED ON IGNITION TIME OF 1000 EDT ON APRIL 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
WHILE A COLD FRONT PUSHES FURTHER INTO THE ATLANTIC TODAY...A SECOND
REINFORCING COLD FRONT WILL APPROACH FROM THE W AND PUSH THROUGH
THE AREA TONIGHT. WEAK HIGH PRESSURE WILL THEN BUILD OVER THE AREA
WEDNESDAY INTO THURSDAY.

MUCH DRIER AIR WILL MOVE INTO THE AREA TODAY BETWEEN BOTH COLD
FRONTS...DROPPING RH VALUES TO NEAR CRITICAL LEVELS /29-25 PERCENT/.
SEABREEZE MAY DEVELOP THIS AFTERNOON BUT NOT UNTIL LATE.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY EARLY...BECOMING MOSTLY CLOUDY
                    WITH ISOLATED SPRINKLES LATE.
MAX TEMPERATURE.....AROUND 77.
MIN HUMIDITY........32 PERCENT.
20 FT WINDS.........SOUTHWEST WINDS 11 TO 16 MPH WITH GUSTS UP
                    TO 25 MPH.
MIXING HEIGHT.......7200 FT AGL.
TRANSPORT WINDS.....WEST 16 TO 24 MPH.

TIME (EDT)      10 AM  NOON   2 PM   4 PM
SKY /PERCENT/...30     37     42     49
WEATHER COV.....              ISOLTD ISOLTD
WEATHER TYPE....NONE   NONE   SHWR   SHWR
TEMP............66     72     75     77
RH..............58     42     34     32
20 FT WIND......W 6    W 10   W 12   SW 13
20 FT WIND GUST.10     20     25     25


.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY...THEN BECOMING PARTLY CLOUDY LATE.
                    A SLIGHT CHANCE OF SHOWERS IN THE EVENING.
MIN TEMPERATURE.....AROUND 48.
MAX HUMIDITY........93 PERCENT.
20 FT WINDS.........WEST WINDS 9 TO 14 MPH.
INVERSION/DISPERSION...1900-900/FAIR.

$$
FORECASTER...CALDERONE
REQUESTED BY...BILL TWOMEY
TYPE OF REQUEST...PRESCRIBED
.TAG 20090421.C85A9.01/CHS