FNUS76 KSEW 040006
FWSSEW

SPOT FORECAST FOR BIG HUMP...WASHINGTON DNR
NATIONAL WEATHER SERVICE SEATTLE WA
506 PM PDT SAT SEP 3 2011

FORECAST IS BASED ON REQUEST TIME OF 1638 PDT ON SEPTEMBER 03.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

...A RED FLAG WARNING IS IN EFFECT THROUGH SUNDAY...

.DISCUSSION...A CRITICAL PERIOD OF FIRE WEATHER IS UPON THE
OLYMPIC MOUNTAINS. A THERMAL PRESSURE TROUGH WAS LOCATED ALONG
THE COAST THIS AFTERNOON AND WILL REMAIN IN PLACE TONIGHT. THE
THERMAL TROUGH AXIS WILL MOVE ACROSS THE OLYMPIC MOUNTAINS ON
SUNDAY MORNING...BRINGING A CRITICALLY DRY AND UNSTABLE
ATMSOPHERE. IN FACT ABOVE THE NIGHTTIME INVERSION TONIGHT...
OVERNIGHT HUMIDITY VALUES ARE EXPECTED TO DROP ON THE MID-SLOPES
AND RIDGES ABOVE THE FIRE.

 FORECAST FOR 20 FOOT WIND SPEED (VALLEYS AND RIDGE TOPS) ARE 10
 MINUTE AVERAGES REFLECTING RAWS WINDS.

.TONIGHT...

SKY/WEATHER.........CLEAR.
CWR.................0%.
MIN TEMPERATURE.....AROUND 50-52.
MAX HUMIDITY........65-70 PERCENT IN THE BOTTOM OF THE DRAINAGE.
                    ABOVE THE NIGHTTIME INVERSION...EVENING RECOVERY
                    OF 38-45 PERCENT...THEN HUMIDITY FALLING
                    OVERNIGHT TO 30 PERCENT OR LESS.
WIND (20 FT)........
 SLOPE/VALLEY.......BECOMING DOWNSLOPE/DOWNVALLEY 3 TO 5 MPH AROUND
                    SUNSET...THEN BECOMING LIGHT OVERNIGHT.
 MIDSLOPES/RIDGES...SOUTHEAST WINDS 5 TO 7 MPH.
MIXING HEIGHT.......6500 FT MSL EARLY THIS EVENING...THEN DECREASING TO
                    NEAR 0 FT AGL BY LATE THIS EVEING.
TRANSPORT WINDS.....EAST 5 MPH THIS EVENING...THEN SMOKE WILL DRIFT
                    DOWN THE DUCKABUSH DRAINAGE NEAR 5 MPH DURING
                    THE LATE EVENING AND OVERNIGHT.
HAINES INDEX........MID-LEVEL....5 OR MODERATE.
                    HIGH-LEVEL...5 OR MODERATE.
LAL.................1.
RAINFALL AMOUNT.....0.00 INCHES.

.SUNDAY...

SKY/WEATHER.........SUNNY.
CWR.................0%.
MAX TEMPERATURE.....80-84.
MIN HUMIDITY........20-23 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......DOWNSLOPE/DOWNVALLEY 1 TO 3 MPH EARLY IN THE
                    MORNING...BECOMING UPSLOPE/UPVALLEY 4 TO 8 MPH
                    BY LATE MORNING.
 MIDSLOPES/RIDGES...SOUTH WIND 5 TO 7 MPH...BECOMING SOUTHWEST.
MIXING HEIGHT.......0 FT AGL INCREASING TO 7400 FT MSL DURING THE
                    DAY.
TRANSPORT WINDS.....AFTER THE MORNING INVERSION BREAKS...
                    SOUTH AT 5 MPH...BECOMING SOUTHWEST IN THE
                    AFTERNOON.
HAINES INDEX........MID-LEVEL....5 OR MODERATE.
                    HIGH-LEVEL...5 OR MODERATE.
LAL.................1.
RAINFALL AMOUNT.....0.00 INCHES.

$$
FORECASTER...HANER
REQUESTED BY...TISHA ANDERSON
TYPE OF REQUEST...WILDFIRE
.TAG 20110903.BIGHU.02/SEW