FNUS76 KPDT 181308
FWSPDT

SPOT FORECAST FOR HIGHWAY 20  104...USFS DEF
NATIONAL WEATHER SERVICE PENDLETON OR
610 AM PDT SUN APR 18 2010

FORECAST IS BASED ON IGNITION TIME OF 0800 PDT ON APRIL 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...DRY AND UNSEASONABLY WARM CONDITIONS ARE EXPECTED
TODAY AND TONIGHT.  A LARGE LOW PRESSURE TROUGH OFFSHORE WILL
GRADUALLY MOVE INLAND ON MONDAY...SPREADING PRECIPITATION TO THE
CASCADE RANGE MONDAY MORNING THEN ACROSS CENTRAL OREGON IN THE LATE
AFTERNOON. THE AIR MASS WILL BE UNSTABLE...THUS THERE IS A
POSSIBILITY OF A LATE AFTERNOON AND EVENING THUNDERSTORM.

***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***

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0.
MAX TEMPERATURE.....68.
MIN HUMIDITY........25 PERCENT.
WIND (20 FT)........UPSLOPE (MAINLY SOUTH) LESS THAN 5 MPH.
 UPR SLP/RIDGETOP...SOUTHEAST-SOUTH 3-7 MPH.
MIXING HEIGHT.......NEAR SURFACE INCREASING TO 8500 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....LIGHT WINDS BECOMING SOUTH AROUND 12 MPH IN THE
                    AFTERNOON.


                            TEMPERATURE     HUMIDITY     20-FT WIND (MPH)
                    1000        51             70
                    1200        60             43
                    1400        65             32
                    1600        67             31
                    1800        63             43
                    2000        54             65



.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0.
MIN TEMPERATURE.....41.
MAX HUMIDITY........86 PERCENT.
WIND (20 FT)........SOUTH-SOUTHWEST WINDS 3-7 MPH BECOMING DRAINAGE
                    1-2 MPH AFTER 8 PM.
 UPR SLP/RIDGETOP...WEST 2-4 MPH...BECOMING NORTHWEST 5-9 MPH AFTER
                    8 PM.
MIXING HEIGHT.......8500 FT AGL DECREASING TO NEAR SURFACE AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....WEST AROUND 5 MPH.

.MONDAY...

SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS AND A
                    SLIGHT CHANCE OF THUNDERSTORMS AFTER 2 PM.
CWR.................0.
MAX TEMPERATURE.....70.
MIN HUMIDITY........30 PERCENT.
WIND (20 FT)........UPSLOPE LESS THAN 5 MPH BECOMING SOUTHWEST 3-6
                    MPH IN THE LATE AFTERNOON.
 UPR SLP/RIDGETOP...SOUTH 3-6 MPH.
MIXING HEIGHT.......NEAR SURFACE INCREASING TO 4500 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 5 TO 7 MPH.

$$

FORECASTER...MARY JOHNSON
REQUESTED BY...TREVOR MILLER
TYPE OF REQUEST...PRESCRIBED
.TAG 20100418.HIGHW.01/PDT