FNUS76 KSTO 160600
FWSSTO

SPOT FORECAST FOR YUBA INCIDENT...NEVADA/YUBA/PLACER UNIT
NATIONAL WEATHER SERVICE SACRAMENTO CA
1100 PM PDT SAT AUG 15 2009

FORECAST IS BASED ON REQUEST TIME OF 2208 PDT ON AUGUST 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
HIGH PRESSURE WILL BUILD ACROSS THE REGION THE NEXT FEW DAYS
RESULTING IN WARM AND DRY CONDITIONS FOR THE FIRE. LIGHT TO MODERATE
NORTHERLY WIND PATTERN WILL PERSIST THROUGH THE EARLY PART OF THIS
WEEK WITH SURFACE WINDS GENERALLY NORTHEASTERLY DURING THE NIGHT AND
MORNING HOURS TRANSITIONING TO NORTHWEST BY LATE MORNING AND
CONTINUING DURING THE AFTERNOONS. STRONGEST GUSTS EXPECTED RIDGETOPS
AND CANYONS DURING THE EARLY MORNING HOURS AND AGAIN LATE IN THE
AFTERNOONS.

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....94-98.
MIN HUMIDITY........10-15 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....NORTHEAST 2-5 MPH WITH GUSTS 8-10 MPH NEAR
                    CANYONS IN THE MORNING BECOMING WEST 3-6 MPH
                    GUSTS TO 8 MPH IN THE AFTERNOON.
   RIDGETOP.........NORTHEAST 4-8 MPH GUSTS 12-14 MPH IN THE MORNING
                    BECOMING WEST NORTHWEST 4-8 MPH GUSTS TO 12 MPH
                    IN THE AFTERNOON.
CWR.................0 PERCENT.
LAL.................1.
MIXING HEIGHT.......INCREASING TO 10000 FT AGL IN THE AFTERNOON.
                    INVERSION BREAKING AROUND NOON TO 1300 PDT.
MIXING WINDS........WEST NORTHWEST 5 MPH.

.TONIGHT...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....65-70.
MAX HUMIDITY........50-60 PERCENT DRAINAGES AND LOWER SLOPES...25-35
                    PERCENT MID-SLOPES TO RIDGETOPS.
WIND (20 FT)........
   SLOPE/VALLEY.....WEST 2-5 MPH IN THE EARLY EVENING BECOMING
                    NORTHEAST 2-6 MPH BY LATE EVENING WITH GUSTS
                    8-10 MPH NEAR CANYONS AFTER MIDNIGHT.
   RIDGETOP.........WEST NORTHWEST 3-6 MPH IN THE EARLY EVENING
                    BECOMING NORTHEAST 4-8 MPH BY LATE EVENING WITH
                    GUSTS 12-14 MPH AFTER MIDNIGHT.
CWR.................0 PERCENT.
LAL.................1.
MIXING HEIGHT.......DECREASING TO BELOW 1000 FT AGL IN THE EVENING.
                    STRONG INVERSION DEVELOPING BY 2100 PDT.
MIXING WINDS........EAST AROUND 5 MPH.

.MONDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....98-102.
MIN HUMIDITY........AROUND 15 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....NORTHEAST 3-6 MPH WITH GUSTS 8-10 MPH NEAR
                    CANYONS IN THE MORNING BECOMING WEST 2-5 MPH
                    GUSTS TO 8 MPH IN THE AFTERNOON.
   RIDGETOP.........NORTHEAST 4-8 MPH GUSTS 12-14 MPH IN THE EARLY
                    MORNING BECOMING WEST NORTHWEST 3-6 MPH GUSTS TO
                    10 MPH IN THE AFTERNOON.
CWR.................0 PERCENT.
LAL.................1.
MIXING HEIGHT.......INCREASING TO 10000 FT AGL IN THE AFTERNOON.
                    INVERSION BREAKING AROUND NOON TO 1300 PDT.
MIXING WINDS........BECOMING WEST AROUND 5 MPH.

FORECASTER...DFR
REQUESTED BY...CHRIS WATERS
REASON FOR REQUEST...WILDFIRE
.TAG 20090815.YUBAI.01/STO

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