FNUS76 KSEW 111444
FWSSEW

SPOT FORECAST FOR RAINBOW BRIDGE FIRE...NPS NORTH CASCADES
NATIONAL WEATHER SERVICE SEATTLE WA
744 AM PDT WED AUG 11 2010

FORECAST IS BASED ON REQUEST TIME OF 0705 PDT ON AUGUST 11.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...LINGERING WEAK INSTABILITY WILL ALLOW FOR SOME
CUMULUS TO BUILD UP THIS AFTERNOON WITH A SMALL CHANCE OF A
SHOWER NEAR THE FIRE AREA...MAINLY AROUND THE CREST. I CAN'T RULE
OUT A DYING SHOWER MOVING OVER THE FIRE BUT IF ONE DOES...IT
WOULD BE LIGHT.

A WEAK UPPER LEVEL DISTURBANCE WILL ENHANCE THE NORMAL NORTHWEST
BREEZE A BIT LATE THURSDAY AFTERNOON AND EVENING BUT IT WILL PASS
BY DRY.  BEYOND THAT...AN UPPER LEVEL RIDGE WILL BEGIN TO NUDGE
INTO WASHINGTON LATE THURSDAY AND BUILD OVER THE WEST COAST
THROUGH THE WEEKEND AND POSSIBLY INTO NEXT WEEK.  THIS WILL BRING
ABOUT A WARMING AND DRYING TREND WITH WINDS BECOMING PREDOMINATELY
TERRAIN DRIVEN.

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

.TODAY...

SKY/WEATHER.........SUNNY WITH A FEW AFTERNOON BUILD-UPS. SLIGHT
                    CHANCE OF A LIGHT SHOWER OR SPRINKLE LATE.
CWR.................LESS THAN 10%.
MAX TEMPERATURE.....AROUND 85 AT 1200 FT AND 71 AT 3500 FT.
MIN HUMIDITY........22-27 PERCENT AT 1200 FT AND 30-35 PERCENT
                    AT 3500 FT.
WIND (20 FT)........BECOMING UPSLOPE/UPVALLEY 4 TO 6 MPH...EXCEPT
                    BECOMING NORTHWEST 5 TO 8 MPH WITH A FEW GUSTS
                    NEAR 18 MPH LATE LOWER ELEVATIONS.
HAINES INDEX........2 OR VERY LOW.
LAL.................1.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY THIS EVENING THEN CLEAR.
CWR.................LESS THAN 10%.
MIN TEMPERATURE.....54-58 AT 1200 FT AND 48-52 AT 3500 FT.
MAX HUMIDITY........75-82 PERCENT THROUGHOUT.
WIND (20 FT)........NORTHWEST WINDS 3 TO 6 MPH WITH A FEW EARLY
                    EVENING GUSTS NEAR 18 LOWER ELEVATIONS. WIND
                    BECOMING DOWNSLOPE/DOWNVALLEY 1 TO 4 MPH
                    LATE EVENING.
HAINES INDEX........2 OR VERY LOW.
LAL.................1.

.THURSDAY...

SKY/WEATHER.........SUNNY.
CWR.................0%.
MAX TEMPERATURE.....AROUND 90 AT 1200 FT AND 76 AT 3500 FT.
MIN HUMIDITY........17-22 PERCENT AT 1200 FT AND 26-32 PERCENT
                    AT 3500 FT.
WIND (20 FT)........UPSLOPE/UPVALLEY 4 TO 6 MPH...EXCEPT BECOMING
                    NORTHWEST 6 TO 9 MPH WITH GUSTS 18 TO 22 MPH
                    LATE LOWER ELEVATIONS.
HAINES INDEX........3 OR VERY LOW.
LAL.................1.

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY THROUGH SUNDAY...
MOSTLY CLEAR. LOWS IN THE UPPER 50S. HIGHS 90 TO 95 VALLEYS AND
75 TO 80 RIDGES. WIND UPSLOPE/UPVALLEY 5 TO 7 MPH.

$$
FORECASTER...CERNIGLIA
REQUESTED BY...LESHA HASTINGS-SKAER
TYPE OF REQUEST...WILDFIRE
.TAG 20100811.RAINB.01/SEW