FNUS76 KPDT 100018
FWSPDT

SPOT FORECAST FOR HIGHWAY 141...WA IMT #5
NATIONAL WEATHER SERVICE PENDLETON OR
518 PM PDT SUN SEP 9 2012

FORECAST IS BASED ON REQUEST TIME OF 1625 PDT ON SEPTEMBER 09.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT UNTIL 11 PM PDT MONDAY...

.DISCUSSION...A COLD FRONT WILL PUSH ACROSS THE AREA MONDAY AS AN
UPPER LEVEL TROUGH DEEPENS ACROSS THE INTERIOR PACIFIC NORTHWEST.
STRONG WESTERLY SURFACE GRADIENTS CONTINUE ALONG THE COLUMBIA RIVER
GORGE AND WILL PERSIST TONIGHT THROUGH MONDAY EVENING BEFORE
DIMINISHING AFTER SUNSET MONDAY NIGHT.  EXPECT RIDGETOP WINDS TO BE
SIMILAR TO THAT OF THE SLOPE WINDS...SINCE THE MAIN FORCE DRIVING
THESE WINDS IS THE WEATHER SYSTEM.  THERE WILL BE A SLIGHT CHANCE OF
SHOWERS TONIGHT DUE TO SPILL OVER FROM THE CASCADE CREST.  WITH SKY
CONDITIONS TOMORROW.

***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.........MOSTLY CLOUDY WITH A SLIGHT CHANCE OF RAIN AFTER
                    MIDNIGHT.

CWR.................0.
MIN TEMPERATURE.....56.
MAX HUMIDITY........86 PERCENT.
WIND (20 FT)........WEST WINDS 12 TO 18 MPH WITH GUSTS UP TO
                    30 MPH DECREASING 7 TO 11 MPH GUSTING TO 20 MPH
                    OVERNIGHT.
RIDGETOP WIND.......WEST WINDS 12 TO 18 MPH DECREASING 10 TO 15 MPH
                    GUSTING TO 25 MPH OVERNIGHT.
MIXING HEIGHT.......1500 FT AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST AROUND 22 MPH DECREASING TO AROUND 10 MPH
                    AFTER MIDNIGHT.
LAL.................1.
HAINES INDEX........3 (VERY LOW).

.MONDAY...

SKY/WEATHER.........MOSTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS IN
                    THE MORNING.  CLOUDS DECREASING IN THE AFTERNOON
                    AND EVENING BECOMING MOSTLY SUNNY.
CWR.................0.
MAX TEMPERATURE.....67.
MIN HUMIDITY........44 PERCENT.
WIND (20 FT)........WEST WINDS 12 TO 17 MPH WITH GUSTS UP TO 30 MPH.
RIDGETOP WIND.......WEST WINDS 14 TO 20 MPH WITH GUSTS UP TO 35 MPH.
MIXING HEIGHT.......5000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 17 TO 22 MPH.
LAL.................1.
HAINES INDEX........3 (VERY LOW).

.MONDAY NIGHT...

SKY/WEATHER.........MOSTLY CLEAR
CWR.................0.
MIN TEMPERATURE.....46.
MAX HUMIDITY........86 PERCENT.
WIND (20 FT)........WEST WINDS 12 TO 17 MPH WITH GUSTS UP TO 30 MPH
                    IN THE EVENING DECREASING 7 TO 10 AFTER
                    MIDNIGHT.
RIDGETOP WIND.......WEST WINDS 14 TO 19 MPH WITH GUST UP TO 35 MPH
                    DECREASING 8 TO 11 AFTER MIDNIGHT.
MIXING HEIGHT.......1500 FT AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST NORTHWEST WINDS 5 TO 10 MPH.
LAL.................1.
HAINES INDEX........3 (VERY LOW).


$$
FORECASTER...DOUGLAS WEBER
REQUESTED BY...MATT CASTLE
TYPE OF REQUEST...WILDFIRE
.TAG 20120909.HIGHW.01/PDT