FNUS76 KSEW 211547
FWSSEW

SPOT FORECAST FOR TA 15 PRAIRIE...FT LEWIS FORESTRY
NATIONAL WEATHER SERVICE SEATTLE WA
847 AM PDT MON SEP 21 2009

FORECAST IS BASED ON IGNITION TIME OF 1100 PDT ON SEPTEMBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...A BUILDING UPPER LEVEL RIDGE AND DEVELOPING LOW LEVEL
EASTERLY FLOW WILL GIVE VERY DRY WEATHER AND A WARMING TREND TO THE
AREA THROUGH MID WEEK. TEMPERATURES WILL AVERAGE WELL ABOVE NORMAL
THROUGH WEDNESDAY. A WEAK DISTURBANCE WILL PASS BY TO NORTH
WEDNESDAY NIGHT AND THURSDAY. AS THE DISTURBANCE PASSES...MARINE
CLOUDS WILL PUSH INLAND AND LOWLAND TEMPERATURES WILL RETURN TO NEAR
NORMAL. THE UPPER LEVEL RIDGE WILL REBUILD FRIDAY INTO NEXT WEEKEND
BUT THE LOW LEVEL FLOW WILL REMAIN ONSHORE KEEPING DAYTIME HIGHS JUST
A FEW DEGREES ABOVE NORMAL.

NOTE...THE OLYMPIA AND CHEHALIS AIRPORTS AND THE CHEHALIS RAWS
OBSERVATIONS WERE USED IN MAKING THIS FORECAST.

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

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....60-63 DEGREES AT IGNITION WITH A MAX TEMP OF
                    77-80 DEGREES.
MIN HUMIDITY........62-65 PERCENT AT IGNITION WITH A MIN RH OF
                    28-32 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......LIGHT AND VARIABLE WINDS 2 TO 4 MPH AT IGNITION
                    BECOMING EAST TO NORTHEAST 5 TO 8 MPH THIS
                    AFTERNOON.
MIXING HEIGHT.......700 FT AGL INCREASING TO 3000 FT AGL LATE IN
                    THE MORNING.
TRANSPORT WINDS.....NORTHEAST 4 TO 7 MPH.
HAINES MID-LEVEL....5 OR MODERATE.
       HIGH-LEVEL...4 OR LOW.

.TONIGHT...

MIXING HEIGHT.......3000 FT AGL DECREASING TO 0 FT AGL LATE IN THE
                    EVENING.
TRANSPORT WINDS.....NORTHEAST 5 TO 8 MPH.

$$
FORECASTER...PRANGE
REQUESTED BY...DAN LEEPER
TYPE OF REQUEST...PRESCRIBED
.TAG 20090921.TA15P.01/SEW