FNUS76 KSEW 090007
FWSSEW

SPOT FORECAST FOR RAINBOW BRIDGE FIRE...NPS NORTH CASCADES
NATIONAL WEATHER SERVICE SEATTLE WA
507 PM PDT SUN AUG 8 2010

FORECAST IS BASED ON REQUEST TIME OF 1700 PDT ON AUGUST 08.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...AN UPPER LOW WILL DROP SOUTH OVER WESTERN WASHINGTON
LATE MONDAY INTO TUESDAY THEN CONTINUE SOUTH INTO OREGON WEDNESDAY.
THIS LOW WILL BRING A THREAT OF SHOWERS TO THE REGION MONDAY THROUGH
WEDNESDAY. IT IS ALSO EXPECTED TO GENERATE ENOUGH INSTABILITY TO
BRING A THREAT OF THUNDERSTORMS TO THE NORTH CASCADES LATE
MONDAY THROUGH WEDNESDAY. THE THUNDERSTORMS THAT DO DEVELOP WILL
BE WET. TEMPERATURES WILL REMAIN ON THE COOL SIDE THROUGH TUESDAY
WITH HIGHER THAN NORMAL RELATIVE HUMIDITY VALUES.

AT THIS TIME THE LOW IS EXPECTED TO DROP FAR ENOUGH SOUTH THURSDAY
ONWARD TO NOT HAVE A SIGNIFICANT EFFECT ON THE AREA.  THIS WILL
RESULT IN A WARMING AND DRYING TREND LATER IN THE WEEK WHERE
TEMPERATURES WILL BECOME WARMER THAN NORMAL WITH LOWER RELATIVE
HUMIDITIES.

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

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
                    EVENING.
CWR.................LESS THAN 10%.
MIN TEMPERATURE.....52-59.
MAX HUMIDITY........80-89 PERCENT.
WIND (EYE LEVEL)....NORTHWEST WINDS 5 TO 7 MPH.
WIND (20 FT)........
 LWR SLP/VALLEY.....NORTHWEST WINDS 5 TO 7 MPH.
HAINES INDEX........3 OR VERY LOW.
LAL.................1.

.MONDAY...

SKY/WEATHER.........PARTLY SUNNY. SLIGHT CHANCE OF SHOWERS IN THE
                    AFTERNOON.
CWR.................LESS THAN 10%.
MAX TEMPERATURE.....76-85.
MIN HUMIDITY........31-38 PERCENT.
WIND (EYE LEVEL)....WEST WINDS 3 TO 6 MPH.
WIND (20 FT)........
 LWR SLP/VALLEY.....WEST WINDS 3 TO 6 MPH.
HAINES INDEX........3 OR VERY LOW.
LAL.................1.

$$
FORECASTER...SCHNEIDER
REQUESTED BY...LESHA HASTINGS-SKAER
TYPE OF REQUEST...WILDFIRE
.TAG 20100808.RAINB.01/SEW