FNUS76 KSEW 050002
FWSSEW

SPOT FORECAST FOR RAINBOW BRIDGE...NPS NORTH CASCADES
NATIONAL WEATHER SERVICE SEATTLE WA
502 PM PDT WED AUG 4 2010

FORECAST IS BASED ON REQUEST TIME OF 1733 MDT ON AUGUST 04.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...AN UPPER LOW OVER THE REGION WILL WEAKEN AND BECOME A
TROUGH ALIGNED ALONG THE WEST COAST THROUGH THURSDAY.  THIS WILL
MAINTAIN THE CHANCE OF SHOWERS AND THUNDERSTORMS IN THE VICINITY
OF THE FIRE THROUGH THURSDAY...WITH ONLY A SLIGHT CHANCE LATE FRIDAY
AND SATURDAY.

A MODERATE ONSHORE PUSH WILL DEVELOP LATE FRIDAY IN ADVANCE OF
A TROUGH APPROACHING FROM THE WEST.  THIS TROUGH WILL MOVE SLOWLY
ACROSS THE AREA THROUGH THE WEEKEND BRINGING COOLER TEMPERATURES
AND HIGHER HUMIDITIES.  THIS WILL ALSO BRING ABOUT AN INCREASE IN
THE LATE AFTERNOON AND EVENING DOWNVALLY WIND ON LAKE CHELAN
FRIDAY AND SATURDAY COMPARED TO WHAT WE HAVE HAD RECENTLY.

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

.THURSDAY...

SKY/WEATHER.........MOSTLY SUNNY IN THE MORNING THEN PARTLY SUNNY.
                    SCATTERED SHOWERS AND THUNDERSTORMS...MAINLY
                    DURING THE AFTERNOON.
CWR.................12 PERCENT.
MAX TEMPERATURE.....86 AT 1400 FT AND 69 AT 6000 FT.
MIN HUMIDITY........31 PERCENT AT 1400 FT AND 48 PERCENT AT 6000 FT.
WIND (20 FT)........UPSLOPE/UPVALLEY 3 TO 5 MPH BECOMING NORTHWEST
                    3 TO 6 MPH LATE AFTERNOON.
                    BECOMING LIGHT.
HAINES INDEX........3 OR VERY LOW.
LAL.................4.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
                    SCATTERED SHOWERS AND THUNDERSTORMS IN THE
                    EVENING.
CWR.................LESS THAN 10%.
MIN TEMPERATURE.....56 AT 1400 FT AND 49 AT 6000 FT.
MAX HUMIDITY........90 PERCENT AT 1400 FT AND 75 PERCENT AT 6000 FT.
WIND (20 FT)........NORTHWEST WINDS 3 TO 7 MPH BECOMING DOWNSLOPE
                    DOWNVALLEY 2 TO 4 MPH AFT 2200 PDT.
HAINES INDEX........3 OR VERY LOW.
LAL.................4.

.FRIDAY...

SKY/WEATHER.........MOSTLY SUNNY. SLIGHT CHANCE OF A THUNDERSTORM
                    LATE.
CWR.................LESS THAN 10%.
MAX TEMPERATURE.....88 AT 1400 FT AND 72 AT 6000 FT.
MIN HUMIDITY........24-29 PERCENT AT 1400 FT AND 40-45 PERCENT AT
                    6000 FT.
WIND (20 FT)........NORTHWEST WINDS 3 TO 8 MPH...INCREASING TO
                    7 TO 10 MPH TOWARD EVENING WITH OCCASIONAL
                    GUSTS TO 20 MPH
HAINES INDEX........3 OR VERY LOW.
LAL.................1.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...
MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE 50S. HIGHS IN
THE LOWER 80S VALLEY AND 65 TO 70 RIDGES. NORTHWEST WINDS 5 TO 9
MPH. OCCASIONAL LATE DAY GUSTS TO 18 MPH.
.SUNDAY...
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS IN THE 50S. HIGHS AROUND 80
VALLEY AND 65 TO 70 RIDGES. NORTHWEST WINDS 4 TO 8 MPH.
.MONDAY...
PARTLY CLOUDY. LOWS IN THE MID 50S. HIGHS IN THE MID 80S VALLEY
AND AROUND 70 RIDGES. NORTHWEST WINDS AROUND 5 MPH.

$$
FORECASTER...CERNIGLIA
REQUESTED BY...FBAN
TYPE OF REQUEST...WILDFIRE
.TAG 20100804.RAINB.01/SEW