FNUS76 KPDT 171838
FWSPDT

SPOT FORECAST FOR NORTH FORK COMPLEX...USFS UMF
NATIONAL WEATHER SERVICE PENDLETON OR
1138 AM PDT THU SEP 17 2009

FORECAST IS BASED ON REQUEST TIME OF 1048 PDT ON SEPTEMBER 17.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...TODAY WILL BE MOSTLY SUNNY AS HIGH PRESSURE BUILDS
OVER NORTHEAST OREGON. WINDS TODAY WILL BE DRIVEN BY PRESSURE
GRADIENTS. PRESSURE GRADIENTS RELAX THIS EVENING ALLOWING WINDS TO
BECOME LIGHT AND TERRAIN DRIVEN BY EARLY THIS EVENING WITH TERRAIN
DRIVEN WINDS CONTINUING OVERNIGHT AND ON FRIDAY. THE NEXT FRONT WILL
BRING A SLIGHT CHANCE OF SHOWERS ON SATURDAY WITH INCREASING WINDS
SATURDAY AFTERNOON INTO SATURDAY EVENING.

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

.REST OF TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0.
MAX TEMPERATURE.....74.
MIN HUMIDITY........29 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 9 MPH.
RIDGETOP WIND.......NORTHWEST WINDS 6 TO 10 MPH.
MIXING HEIGHT.......4500 FT AGL.
TRANSPORT WINDS.....NORTH AROUND 6 MPH.
LAL.................1.
HAINES INDEX........2 (VERY LOW).

.TONIGHT...

SKY/WEATHER.........CLEAR.
CWR.................0.
MIN TEMPERATURE.....39.
MAX HUMIDITY........75 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 3 TO 7 MPH UNTIL 2000 THEN
                    DRAINAGE WINDS 1 TO 4 MPH.
RIDGETOP WIND.......NORTHWEST WINDS 3 TO 8 MPH UNTIL 2200...THEN
                    SHIFTING TO EAST WINDS 2 TO 5 MPH.
MIXING HEIGHT.......4500 FT AGL DECREASING TO 0 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTH AROUND 6 MPH SHIFTING TO THE EAST AROUND
                    5 MPH AFTER MIDNIGHT.
LAL.................1.
HAINES INDEX........4 (LOW).

.FRIDAY...

SKY/WEATHER.........SUNNY.
CWR.................0.
MAX TEMPERATURE.....83.
MIN HUMIDITY........16 PERCENT.
WIND (20 FT)........DRAINAGE WINDS 1 TO 4 MPH UNTIL 0900 THEN
                    BECOMING UPVALLEY AND UPSLOPE WINDS 3 TO 8 MPH.
RIDGETOP WIND.......SOUTHEAST WINDS 2 TO 6 MPH IN THE MORNING THEN
                    BECOMING NORTH WINDS 4 TO 9 MPH.
MIXING HEIGHT.......0 FT AGL INCREASING TO 8000 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
LAL.................1.
HAINES INDEX........4 (LOW).

$$
FORECASTER...ALAN POLAN
REQUESTED BY...UNION IHC
TYPE OF REQUEST...WILDFIRE
.TAG 20090917.NORTH.02/PDT