FNUS76 KSEW 170254
FWSSEW

SPOT FORECAST FOR RICHERT...SOUTH PUGET SOUND DISPATCH
NATIONAL WEATHER SERVICE SEATTLE WA
754 PM PDT MON AUG 16 2010

FORECAST IS BASED ON REQUEST TIME OF 2042 MDT ON AUGUST 16.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...A HOT...DRY AND UNSTABLE AIR MASS WILL REMAIN OVER A
LARGE PART OF WESTERN WASHINGTON INTO MID DAY TUESDAY BEFORE MARINE
AIR BEGINS TO MOVE INTO THE REGION.  A SURFACE THERMAL TROUGH WILL
BE OVER THE PUGET SOUND LOWLANDS TUESDAY MORNING WHICH WILL
TRANSITION ACROSS THE CASCADES THROUGH THE AFTERNOON AND END UP OVER
EASTERN WASHINGTON BY TUESDAY EVENING.  AS THE TROUGH TRANSITIONS
ACROSS THE CASCADES...VERY WARM...DRY AND UNSTABLE CONDITIONS WILL
BE IN PLACE OVER THE CASCADES DURING THE DAY WHILE THE MID LEVEL
HAINES REMAINS AT A 5 OR 6 LEVEL.  THUS...THE RED FLAG WARNING WILL
BE IN PLACE FOR TUESDAY AFTERNOON OVER THE CASCADES ONLY.

FOR THE REMAINDER OF THE AREA...MARINE AIR WILL BEGIN TO SPILL INTO
WESTERN WASHINGTON BEHIND THE THERMAL TROUGH FOR SOMEWHAT COOLER
LATE AFTERNOON TEMPERATURES AND HIGHER RELATIVE HUMIDITIES BELOW
2000 FEET AND WEST OF THE PUGET SOUND.  THE MARINE LAYER WILL DEEPEN
ACROSS ALL OF WESTERN WASHINGTON BELOW ABOUT 4000 FEET TUESDAY NIGHT
AND WEDNESDAY.

AN UPPER LEVEL TROUGH WILL DEVELOP OVER THE WEST COAST THURSDAY
ONWARD WHICH WILL BRING A PERIOD OF COOLER THAN NORMAL TEMPERATURES
AND HIGHER RELATIVE HUMIDITIES THROUGH THE WEEKEND.

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

.REST OF TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR THEN PATCHY LOW CLOUDS AND FOG LATE.
CWR.................LESS THAN 10%.
MIN TEMPERATURE.....AROUND 53.
MAX HUMIDITY........85 PERCENT.
WIND (EYE LEVEL)....LIGHT AND VARIABLE WIND OR WESTERLY DOWNVALLEY TO 5 MPH.

WIND (20 FT)........
HAINES INDEX........5 OR MODERATE.
LAL.................1.

.TUESDAY...

SKY/WEATHER.........PATCHY MORNING FOG OR LOW CLOUDS OTHERWISE SUNNY.
CWR.................LESS THAN 10%.
MAX TEMPERATURE.....AROUND 84.
MIN HUMIDITY........38 PERCENT.
WIND (EYE LEVEL)....LIGHT WIND BECOMING SOUTHWEST 10 MPH IN THE
                    AFTERNOON.
WIND (20 FT)........

HAINES INDEX........5 OR MODERATE.
LAL.................1.


.TUESDAY EVENING AND NIGHT...BREEZY AND COOLER.
SKY/WEATHER.........BREEZY AND COOLER...THEN LOW CLOUDS AND FOG
                    DEVELOPING AROUND MIDNIGHT.
CWR.................LESS THAN 10%.
MIN TEMPERATURE.....AROUND 53.
MIN HUMIDITY........100 PERCENT.
WIND (EYE LEVEL)....SOUTHWEST WIND 10 TO 20 MPH WITH A FEW HIGHER
                    GUSTS FOR SEVERAL HOURS IN THE EVENING.
HAINES INDEX........5 OR MODERATE EARLY...THEN DECREASING RAPIDLY
                    TO STABLE CONDITIONS.
LAL.................1.


.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...
COOLER. MOSTLY CLOUDY. AREAS OF FOG IN THE EVENING. LOWS IN THE
LOWER 50S. HIGHS IN THE MID 60S. SOUTHWEST WINDS 4 TO 7 MPH.
.THURSDAY...
MOSTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE UPPER 60S.
SOUTHWEST WINDS 3 TO 7 MPH.
.FRIDAY...
MOSTLY CLOUDY. LOWS AROUND 50. HIGHS IN THE UPPER 60S. SOUTHWEST
WINDS UP TO 5 MPH.
.SATURDAY...
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS IN THE MID 60S.
SOUTHWEST WINDS 3 TO 6 MPH.

$$
FORECASTER...MCFARLAND
REQUESTED BY...LINDA N  SHAFFER
TYPE OF REQUEST...WILDFIRE
.TAG 20100816.RICHE.02/SEW