FNUS76 KSEW 200101
FWSSEW

SPOT FORECAST FOR BIG HUMP...USFS OLF
NATIONAL WEATHER SERVICE SEATTLE WA
601 PM PDT MON SEP 19 2011

FORECAST IS BASED ON REQUEST TIME OF 1720 PDT ON SEPTEMBER 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...AN UPPER LEVEL RIDGE OF HIGH PRESSURE WILL MOVE OVER
THE AREA THROUGH TUESDAY THEN DRIFT EAST WEDNESDAY PROVIDING FOR A
PERIOD OF DRY AND MOSTLY CLEAR WEATHER. AN APPROACHING COLD FRONT
WILL BRING ABOUT A SMALL THREAT OF RAIN TO THE NORTHWEST TIP OF THE
OLYMPIC PENINSULA WEDNESDAY THEN TO THE REST OF THE AREA WEDNESDAY
NIGHT AND THURSDAY. THE RIDGE WILL REBOUND OVER THE REGION FRIDAY
INTO THE WEEKEND FOR ANOTHER WARM AND DRY PERIOD.

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

.DISCUSSION...AN UPPER LEVEL RIDGE OF HIGH PRESSURE WILL MOVE OVER
THE AREA THROUGH TUESDAY THEN DRIFT EAST WEDNESDAY PROVIDING FOR A
PERIOD OF DRY AND MOSTLY CLEAR WEATHER. AN APPROACHING COLD FRONT
WILL BRING ABOUT A SMALL THREAT OF RAIN TO THE NORTHWEST TIP OF THE
OLYMPIC PENINSULA WEDNESDAY THEN TO THE REST OF THE AREA WEDNESDAY
NIGHT AND THURSDAY. THE FIRE AREA WILL AGAIN BE SHELTERED FROM THE
WORST OF THIS SYSTEM AND MAY NOT SEE A WETTING RAIN. THE RIDGE WILL
REBOUND OVER THE REGION FRIDAY INTO THE WEEKEND FOR ANOTHER WARM AND
DRY PERIOD.

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

.TUESDAY...

SKY/WEATHER.........SUNNY.
CWR.................0%.
MAX TEMPERATURE.....AROUND 74 VALLEYS AND 67 RIDGES.
MIN HUMIDITY........40-50 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......UPSLOPE/UPVALLEY 3 TO 7 MPH.
 RIDGE TOP..........LIGHT WIND BECOMING SOUTH 3 TO 7 MPH.
MIXING HEIGHT.......RISING TO 4000 FT MSL IN THE AFTERNOON.
TRANSPORT WINDS.....LIGHT WIND.
HAINES INDEX........MID-LEVEL...5 OR MODERATE.
    HIGH-LEVEL...3 OR VERY LOW.

.TUESDAY NIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0%.
MIN TEMPERATURE.....AROUND 50.
MAX HUMIDITY........85-95 PERCENT VALLEYS...60-70 PERCENT RIDGES.
WIND (20 FT)........
 SLOPE/VALLEY.......DRAINAGE WIND TO 4 MPH.
 RIDGE TOP..........SOUTH TO SOUTHWEST WIND 5 TO 9 MPH.
MIXING HEIGHT.......DECREASING TO 400 FT AGL.
TRANSPORT WINDS.....LIGHT WIND. SMOKE WILL MOVE DOWN VALLEY IN
                    THE DRAINAGE WINDS.
HAINES INDEX........MID-LEVEL...5 OR MODERATE.
    HIGH-LEVEL...3 OR VERY LOW.

.WEDNESDAY...

SKY/WEATHER.........MOSTLY CLEAR THEN INCREASING CLOUDS.
CWR.................0%.
MAX TEMPERATURE.....AROUND 73 VALLEYS AND 66 RIDGES.
MIN HUMIDITY........AROUND 45 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 4 TO 8 MPH.
 RIDGE TOP..........SOUTH TO SOUTHWEST WIND 8 TO 14 MPH.
MIXING HEIGHT.......RISING TO 4600 FT MSL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 9 MPH.
HAINES INDEX........MID-LEVEL...4 OR LOW.
                    HIGH-LEVEL...2 OR VERY LOW.

$$
FORECASTER...FELTON
REQUESTED BY...KATY DRESSLER
TYPE OF REQUEST...WILDFIRE
.TAG 20110919.BIGHU.01/SEW