FNUS76 KSEW 211513
FWSSEW

SPOT FORECAST FOR BIG HUMP...USFS OLYMPIC
NATIONAL WEATHER SERVICE SEATTLE WA
813 AM PDT WED SEP 21 2011

FORECAST IS BASED ON REQUEST TIME OF 0741 PDT ON SEPTEMBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...DRY AIR THIS MORNING OVER ELEVATIONS ABOVE 2500 FEET
MSL WILL GET WIPED OUT BY INCREASING SOUTHWEST FLOW ALOFT TODAY.
THIS WILL BRING INCREASING AMOUNTS OF CLOUDS AND MOISTURE INTO THE
FIRE AREA TODAY AND TONIGHT. CLOUDS WILL INHIBIT THE TERRAIN-
DRIVEN SLOPE AND VALLEY WINDS...BUT BREEZY OR WINDY CONDITIONS ARE
POSSIBLE BY THIS EVENING NEAR THE TOP OF THE FIRE. THIS WILL OCCUR
IN ADVANCE OF A MARGINAL WETTING RAIN...WITH RAINFALL INTENSITY
PEAKING EARLY THURSDAY MORNING. A MILD AND MUGGY AIR MASS IS
EXPECTED TODAY AND THURSDAY.

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

.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY.
CWR (>0.25")........0%.
MAX TEMPERATURE.....63-68...DEPENDING ON ELEVATION.
MIN HUMIDITY........40-50 PERCENT ABOVE 2500 FEET MSL...
                    60-70 PERCENT BELOW 2500 FEET MSL.
WIND (20 FT)........
 SLOPE/VALLEY.......UPSLOPE/UPVALLEY WINDS 2 TO 5 MPH.
 RIDGE TOP..........SOUTHWEST WINDS 6 TO 9 MPH.
MIXING HEIGHT.......PEAKING AT 5000 FEET MSL THIS AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 25 MPH AT THE TOP OF THE MIXED LAYER.
HAINES INDEX........MID-LEVEL....4 OR LOW.
                    HIGH-LEVEL...2 OR VERY LOW.

.TONIGHT...

SKY/WEATHER.........RAIN DEVELOPING...MAINLY AFTER MIDNIGHT.
CWR (>0.25")........30 PERCENT.
MIN TEMPERATURE.....51-54.
MAX HUMIDITY........95-100 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......LIGHT WIND.
 RIDGE TOP..........SOUTHWEST WINDS 8 TO 12 MPH...GUSTS TO 20 MPH.
MIXING HEIGHT.......DECREASING TO 500 FT AGL LATE THIS EVENING.
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH.
HAINES INDEX........MID-LEVEL....4 OR LOW.
                    HIGH-LEVEL...2 OR VERY LOW.

.THURSDAY...

SKY/WEATHER.........CLOUDY. RAIN LIKELY IN THE MORNING...THEN
                    CHANCE OF RAIN IN THE AFTERNOON.
CWR (>0.25")........45 PERCENT.
MAX TEMPERATURE.....58-66...DEPENDING ON ELEVATION.
MIN HUMIDITY........70-80 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......LIGHT WIND.
 RIDGE TOP..........SOUTHWEST WINDS 7 TO 11 MPH. MORNING GUSTS TO
                    20 MPH.
MIXING HEIGHT.......PEAKING NEAR 5600 FEET MSL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST-SOUTHWEST AROUND 15 MPH AT THE TOP OF THE
                    MIXED LAYER.
HAINES INDEX........MID-LEVEL....3 OR VERY LOW.
                    HIGH-LEVEL...2 OR VERY LOW.

$$
FORECASTER...HANER
REQUESTED BY...ICT3 THOMPSON NEIL
TYPE OF REQUEST...WILDFIRE
.TAG 20110921.BIGHU.01/SEW