FNUS76 KMFR 271813
FWSMFR

SPOT FORECAST FOR BIG BEND...FS
NATIONAL WEATHER SERVICE MEDFORD OR
1113 AM PDT MON SEP 27 2010

FORECAST IS BASED ON IGNITION TIME OF 1200 PDT ON SEPTEMBER 27.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
SURFACE HIGH PRESSURE MOVING WEST OF THE AREA WILL ALLOW A THERMAL
TROUGH TO FORM ALONG THE COAST TODAY AND THEN LIFT NORTHWARD
TONIGHT THROUGH TUESDAY AS IT STRENGTHENS. LOCAL KNOWLEDGE OF THE
AREA INDICATES THAT THIS IS LIKELY TO CAUSE UPSLOPE AND UPVALLEY
WINDS TO BECOME DOWNVALLEY THIS AFTERNOON. THIS SWITCH USUALLY
OCCURS EARLY TO MID AFTERNOON. STRONGER NORTH FLOW ON TUESDAY
MAY PREVENT UPVALLEY FLOW...ESPECIALLY IN THE AFTERNOON.

.TODAY...
SKY/WEATHER.........CLEAR AND SUNNY.
MAX TEMPERATURE.....83-89.
MIN HUMIDITY........35-45 PERCENT.
EYE LEVEL WINDS.....UPVALLEY AND UPSLOPE SOUTH 2-6 MPH BECOMING
                    VARIABLE EARLY AFTERNOON...THEN DOWN VALLEY
                    NORTH 2-6 MPH DURING THE AFTERNOON.
MIXING HEIGHT.......3000 FT AGL THROUGH THE DAY.
MIXING WINDS........SOUTH 5-15 MPH BECOMING VARIABLE EARLY AFTERNOON
                    THEN NORTH 5-15 MPH DURING THE AFTERNOON.


.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR. PATCHY RIVER FOG LATE.
MIN TEMPERATURE.....55-60.
MAX HUMIDITY........96 PERCENT.
EYE LEVEL WINDS.....NORTHEAST DOWNSLOPE AND DOWNVALLEY 2-6 MPH.
MIXING HEIGHT.......FALLING TO 500 FT AGL MID EVENING.
MIXING WINDS........NORTHEAST 7 TO 15 MPH.


.TUESDAY...
SKY/WEATHER.........PATCHY RIVER FOG EARLY...THEN MOSTLY SUNNY.
MAX TEMPERATURE.....79-84.
MIN HUMIDITY........43-53 PERCENT.
EYE LEVEL WINDS.....NORTHEAST 1-3 MPH INCREASING TO 2-6 MPH.
MIXING HEIGHT.......500 AGL OR LESS EARLY...BECOMING 2000-3000 FEET
                    AGL.
MIXING WINDS........NORTHEAST 7 TO 15 MPH.


$$
FORECASTER...LUTZ
REQUESTED BY...LILIENTHAL
TYPE OF REQUEST...PRESCRIBED
.TAG 20100927.BIGBE.01/MFR