FNUS76 KPDT 090035
FWSPDT

SPOT FORECAST FOR HIGHWAY 141...WA IMT #5
NATIONAL WEATHER SERVICE PENDLETON OR
535 PM PDT SAT SEP 8 2012

FORECAST IS BASED ON REQUEST TIME OF 1640 PDT ON SEPTEMBER 08.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT FROM 11 AM SUNDAY TO 11 PM PDT
MONDAY...

.DISCUSSION...A COLD FRONT WILL PUSH ACROSS THE AREA TOMORROW AND
INTO MONDAY AS AN UPPER LEVEL TROUGH DEEPENS ACROSS THE INTERIOR
PACIFIC NORTHWEST.  STRONG WESTERLY SURFACE GRADIENTS WILL SET UP
ALONG THE COLUMBIA RIVER GORGE AND CAN EXPECT INCREASED WEST WINDS
FROM TONIGHT THROUGH MONDAY NIGHT. EXPECT RIDGETOP WINDS TO BE
SIMILAR TO THAT OF THE SLOP WINDS...SINCE THE MAIN FORCE DRIVING
THESE WINDS IS THE WEATHER SYSTEM.  IT IS POSSIBLE FOR WINDS TO TURN
UP CANYON AND FOLLOW A MORE SOUTH SOUTHWEST FLOW...BUT THE CURRENT
FORECAST WILL REFLECT THE OVERALL DOMINATE WEST WIND.  THERE IS A
SLIGHT CHANCE FOR THUNDERSTORMS TONIGHT AND SHOWERS TOMORROW
NIGHT...BUT DO NOT EXPECT SIGNIFICANT RAINFALL AMOUNTS.

***THUNDERSTORMS IMPLY GUSTY AND ERRATIC WINDS***
***WINDS ARE 20 FOOT 10 MINUTE AVERAGES***
***CWR-CHANCE OF WETTING RAIN 0.10 OR GREATER***
***FORECAST IS VALID FOR 12 HOURS AFTER ISSUANCE***

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND
                    THUNDERSTORMS.
CWR.................0.
MIN TEMPERATURE.....57.
MAX HUMIDITY........70 PERCENT.
WIND (20 FT)........WEST NORTHWEST WINDS 3 TO 5 MPH IN THE EVENING.
                    INCREASING WEST 8 TO 12 MPH OVERNIGHT GUSTING UP
                    TO 20 MPH.
RIDGETOP WIND.......WEST NORTHWEST 4 TO 6 MPH IN THE EVENING.
                    INCREASING 10 TO 15 MPH OVERNIGHT GUSTING UP TO
                    25 MPH.
MIXING HEIGHT.......1000 FT AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST WINDS 8 TO 12 MPH.
LAL.................2.
HAINES INDEX........3 (VERY LOW).

.SUNDAY...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0.
MAX TEMPERATURE.....75.
MIN HUMIDITY........43 PERCENT.
WIND (20 FT)........WEST WINDS 8 TO 12 MPH INCREASING 15 TO 25 MPH
                    GUSTING UP TO 35 MPH BY LATE AFTERNOON.
RIDGETOP WIND.......WEST WINDS 10 TO 15 MPH INCREASING 15 TO 25 MPH
                    WITH GUSTS UP TO 35 MPH BY LATE AFTERNOON.
MIXING HEIGHT.......4500 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 18 TO 22 MPH.
LAL.................1.
HAINES INDEX........4 (LOW).

.SUNDAY NIGHT...

SKY/WEATHER.........PARTLY CLOUDY IN THE EVENING BECOMING MOSTLY
                    CLOUDY OVERNIGHT.  A SLIGHT CHANCE OF SHOWERS.
CWR.................0.
MIN TEMPERATURE.....49.
MAX HUMIDITY........81 PERCENT.
WIND (20 FT)........WEST WINDS 15 TO 25 MPH IN THE EVENING
                    DECREASING 10 TO 15 MPH WITH GUSTS UP TO 25 MPH
                    OVERNIGHT.
RIDGETOP WIND.......WEST WINDS 15 TO 25 IN THE EVENING DECREASING 10
                    TO 15 MPH WITH GUST UP TO 25 MPH OVERNIGHT.
MIXING HEIGHT.......1000 FT AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST 10 TO 15 MPH.
LAL.................2.
HAINES INDEX........3 (VERY LOW).

$$
FORECASTER...DOUGLAS WEBER
REQUESTED BY...MATT CASTLE
TYPE OF REQUEST...WILDFIRE
.TAG 20120908.HIGHW.01/PDT