FNUS76 KSEW 042118
FWSSEW

SPOT FORECAST FOR BIG HUMP...USFS OLYMPIC
NATIONAL WEATHER SERVICE SEATTLE WA
218 PM PDT SUN SEP 4 2011

FORECAST IS BASED ON REQUEST TIME OF 1340 PDT ON SEPTEMBER 04.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

...RED FLAG WARNING REMAINS IN EFFECT THROUGH 600 PM SUNDAY...

.DISCUSSION...A THERMAL PRESSURE TROUGH WAS MOVING ACROSS THE
OLYMPIC MOUNTAINS ON SUNDAY AFTERNOON. A MORE STABLE AND SLIGHTLY
MORE HUMID AIR MASS WILL SPREAD INTO THE OLYMPIC MOUNTAINS ON
MONDAY...BUT A FLAT UPPER RIDGE WILL SUPPORT ABOVE NORMAL
TEMPERATURES AND BELOW NORMAL HUMIDITY FOR EARLY SEPTEMBER.

 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.....50 VALLEY BOTTOM...53-57 MID-SLOPES.
MAX HUMIDITY........80 PERCENT VALLEY BOTTOM...50-57 PERCENT ON
                    MID-SLOPES.
WIND (20 FT)........
 VALLEY BOTTOM......DOWNSLOPE/DOWNVALLEY 3 TO 5 MPH THIS EVENING...
                    BECOMING LIGHT OVERNIGHT.
 MIDSLOPES/RIDGES...WEST-SOUTHWEST 4 TO 6 MPH.
MIXING HEIGHT.......DECREASING TO 200 FT AGL OR LESS BY LATE THIS
                    EVENING.
TRANSPORT WINDS.....SMOKE DRIFTING DOWNSLOPE INTO THE VALLEY AND
                    THEN DOWNVALLEY TOWARD HOOD CANAL AT 3 TO 5 MPH.
HAINES INDEX........MID-LEVEL....5 OR MODERATE.
                    HIGH-LEVEL...4 OR LOW.
LAL.................1.
RAINFALL AMOUNT.....0.00 INCHES.

.LABOR DAY...

SKY/WEATHER.........SUNNY.
CWR.................0%.
MAX TEMPERATURE.....AROUND 80 AT 1200 FEET. AROUND 68 AT 3500 FEET.
MIN HUMIDITY........36-44 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......BECOMING UPSLOPE/UPVALLEY 4 TO 8 MPH BY LATE
                    MORNING
 MIDSLOPES/RIDGES...SOUTH-SOUTHWEST 4 TO 7 MPH.
MIXING HEIGHT.......RISING TO 6700 FT MSL IN THE AFTERNOON.
TRANSPORT WINDS.....AFTER THE NIGHTTIME INVERSION BREAKS...
                    SOUTHWEST 5 TO 10 MPH.
HAINES INDEX........MID-LEVEL....5 OR MODERATE.
                    HIGH-LEVEL...5 OR MODERATE.
LAL.................1.
RAINFALL AMOUNT.....0.00 INCHES.

$$
FORECASTER...HANER
REQUESTED BY...KATY DRESSLER
TYPE OF REQUEST...WILDFIRE
.TAG 20110904.BIGHU.01/SEW