FNUS76 KSEW 032305
FWSSEW

SPOT FORECAST FOR LANGILLE...FEDERAL AGENCY
NATIONAL WEATHER SERVICE SEATTLE WA
405 PM PDT MON AUG 3 2009

FORECAST IS BASED ON REQUEST TIME OF 1627 MDT ON AUGUST 03.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...AN UPPER LEVEL RIDGE OF HIGH PRESSURE OVER WESTERN
WASHINGTON CONTINUES TO GRADUALLY WEAKEN AS LOW LEVEL ONSHORE FLOW
GRADUALLY INCREASES. THIS WILL RESULT IN COOLER MAX TEMPERATURES
EACH DAY THROUGH WEDNESDAY. A WEAK WEATHER SYSTEM MOVING NORTHWARD
AND AN UPPER LEVEL TROUGH SINKING SOUTHWARD FROM BRITISH COLUMBIA
HAS PROMPTED THE INCLUSION OF A SLIGHT CHANCE OF THUNDERSTORMS IN
THE FORECAST NEAR THE CASCADE CREST FOR TUESDAY EVENING.
AN UPPER LEVEL TROUGH OF LOW PRESSURE OFF THE CALIFORNIA COAST IS
STILL EXPECTED TO SHIFT INLAND LATE WEDNESDAY OR THURSDAY PRODUCING
EVEN COOLER TEMPERATURES AND THE THREAT OF SHOWERS TO THE REGION.

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

.MONDAY NIGHT...
SKY/WEATHER.........MOSTLY CLEAR OVERNIGHT.
CWR.................0%.
MIN TEMPERATURE.....53-57 VALLEYS AND RIDGES.
MAX HUMIDITY........85-100% VALLEYS.
WIND (20 FT)........
 SLOPE/VALLEY.......WIND BECOMING DOWNSLOPE/DOWNVALLEY 1 TO 4 MPH
                    WITH GUST 6 TO 9 MPH AFTER SUNSET.
 RIDGETOP...........SOUTHWEST 3 TO 5
MIXING HEIGHT.......NEAR 5000 FT AGL...DECREASING TO NEAR 100 FT AGL
                    BY MORNING.
TRANSPORT WINDS.....SOUTHWEST 3 TO 5 MPH.
HAINES INDEX........4 OR LOW (HIGH LEVEL HAINES).
LAL.................1.

.TUESDAY...
SKY/WEATHER.........MOSTLY SUNNY WITH CUMULUS BUILDUPS NEAR THE CASCADE
                    RIDGES IN THE AFTERNOON. SLIGHT CHANCE OF A LATE
                    AFTERNOON SHOWER OR THUNDERSTORMS NEAR THE CASCADE
                    CREST.
CWR.................LESS THAN 10%.
MAX TEMPERATURE.....84-88 VALLEYS AND RIDGES.
MIN HUMIDITY........30-34% VALLEYS...19-24% RIDGES.
WIND (20 FT)........
 SLOPE/VALLEY.......LIGHT AND VARIABLE IN THE MORNING...BECOMING
    UPSLOPE/UPVALLEY 3 TO 7 MPH WITH GUSTS 10 TO 14 MPH
                    BY MID AFTERNOON.
 RIDGETOP...........SOUTHWEST 4 TO 6 MPH INCREASING TO 8 TO 12 MPH LATE
                    IN THE AFTERNOON.
MIXING HEIGHT.......2200 FT AGL INCREASING TO 6300 FT AGL LATE IN
                    THE MORNING.
TRANSPORT WINDS.....SOUTH WEST 5 TO 8 MPH.
HAINES INDEX........5 OR MODERATE (HIGH LEVEL HAINES).
LAL.................1...INCRERASING TO 2 IN THE AFTERNOON.

.TUESDAY NIGHT...
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF AN EVENING SHOWER
                    OR THUNDERSTORM NEAR THE CASCADE CREST.
CWR.................LESS THAN 10%.
MIN TEMPERATURE.....52-55 VALLEYS AND RIDGES.
MAX HUMIDITY........72-88 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST TO SOUTHWEST WINDS 5 TO 8 MPH IN THE EVENING
                    BECOMING LIGHT AFTER MIDNIGHT.
 RIDGETOP...........SOUTH TO SOUTHWEST 7 TO 10 MPH WITH GUSTS 14 TO 18
                    MPH AT TIMES. GUSTS DIMINISHING AFTER MIDNIGHT.
MIXING HEIGHT.......6300 FT AGL DECREASING TO 100 FT AGL LATE IN
                    THE EVENING.
TRANSPORT WINDS.....SOUTHWEST 5 TO 8 MPH.
HAINES INDEX........5 OR MODERATE (HIGH LEVEL HAINES).
LAL.................1.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...
MOSTLY CLOUDY. CHANCE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS,
LOWS IN THE LOW TO MID 50S. HIGHS IN THE MID TO UPPER 780S VALLEYS...LOW
TO MID 70S RIDGES. FREEZING LEVEL 13500 FEET. WEST WIND 5 TO 8 MPH.
.THURSDAY...
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS LOWS IN THE UPPER 40S TO MID 50S.
HIGHS IN THE MID 60S TO LOWER 70S. FREEZING LEVEL 12500 FEET. WEST
WINDS 4 TO 6 MPH.
.FRIDAY...
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS LOWS IN THE MID 40S TO NEAR 50.
HIGHS IN THE MID 60S TO NEAR 70. FREEZING LEVEL 11700 FEET. WEST WINDS
4 TO 6 MPH.

$$
FORECASTER...PRANGE
REQUESTED BY...RISA LANGE-NAVARRO
TYPE OF REQUEST...WILDFIRE
.TAG 20090803.LANGI.01/SEW