FNUS76 KPQR 250424
FWSPQR

SPOT FORECAST FOR SCOTT MOUNTAIN FIRE...USFS WNF
NATIONAL WEATHER SERVICE PORTLAND OR
924 PM PDT TUE AUG 24 2010

FORECAST IS BASED ON REQUEST TIME OF 1921 PDT ON AUGUST 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT UNTIL 8 PM PDT WEDNESDAY FOR MID-LEVEL
HAINES 6...

.DISCUSSION...A RED FLAG WARNING REMAINS IN EFFECT FOR THE WILLAMETTE
NATIONAL FOREST THROUGH WEDNESDAY EVENING DUE TO DRY AND UNSTABLE
AIR MASS IN CONJUNCTION WITH CRITICALLY DRY FUELS. A SURFACE THERMAL
TROUGH WAS LOCATED OVER THE WILLAMETTE VALLEY AS OF 2000 PDT. IT WILL
REMAIN NEARLY STATIONARY TONIGHT...POSSIBLY RETREATING A LITTLE WEST.
HOWEVER...IT SHOULD GET PUSHED TO THE CASCADES BY LATE WEDNESDAY
MORNING AND THEN BE ON THE EAST CASCADE SLOPES BY LATE AFTERNOON.
THE THERMAL TROUGH WILL LIKELY PASS OVER THE FIRE BETWEEN 1300 AND
1600 PDT. ONSHORE FLOW SHOULD REACH THE FIRE AREA LATE WEDNESDAY
EVENING AND INCREASE OVERNIGHT. IT WILL BE MUCH COOLER THURSDAY...BUT
EXPECT BREEZY CONDITIONS IN THE AFTERNOON.

NOTE: FORECAST TEMPS/RH/WIND BASED ON PEBBLE RAWS. RH RECOVERY TONIGHT
WILL LIKELY BE LOWER THAN PEBBLE...ESPECIALLY AT THE HIGHER ELEVATIONS
OF THE FIRE.


CHANCE OF WETTING RAIN (CWR) 0.25 INCHES OR GREATER.
FORECAST WINDS ARE 10 MINUTE AVERAGES 20 FT ABOVE VEGETATION.
THUNDERSTORMS IMPLY GUSTY AND ERRATIC WINDS.


.REST OF TONIGHT...

SKY/WEATHER.........CLEAR.
CWR (%).............0 PERCENT.
MIN TEMPERATURE.....51 TO 55.
MAX HUMIDITY........50 TO 60 PERCENT...BUT 40S NEAR THE TOP.
WIND (20 FT)........EAST 3 TO 8 MPH UNTIL MIDNIGHT THEN SOUTHEAST LESS THAN
                    5 MPH.
VISIBILITY..........GREATER THAN 6 MILES UNTIL MIDNIGHT THEN GENERALLY
                    LESS THAN 3 MILES.
HAINES INDEX(HIGH)..5 (MODERATE)
HAINES INDEX(MID)...6 (HIGH)

.WEDNESDAY...

SKY/WEATHER.........SUNNY.
CWR (%).............0 PERCENT.
MAX TEMPERATURE.....82 TO 85.
MIN HUMIDITY........15 TO 20 PERCENT.
WIND (20 FT)........SOUTHEAST TO 5 MPH THROUGH ABOUT 1000 THEN ERRATIC
                    WIND 3 TO 8 MPH...PREDOMINANTLY UP-SLOPE IN THE
                    AFTERNOON. WATCH FOR SHIFTING WIND DIRECTION IN THE
                    MID TO LATE AFTERNOON AS THE THERMAL TROUGH MOVES
                    ACROSS THE FIRE. WIND WILL SHIFT TO WEST TO NORTHWEST
                    5 TO 10 MPH LATE IN THE DAY WITH GUSTS TO 18 MPH.
VISIBILITY..........1-2 MILES THROUGH 0900 THEN GREATER THAN 6 MILES.
HAINES INDEX(HIGH)..5 (MODERATE)
HAINES INDEX(MID)...6 (HIGH)


.WEDNESDAY NIGHT...
SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....45 TO 50.
MAX HUMIDITY........65 TO 75 PERCENT.
WIND (20 FT)........WEST TO NORTHWEST 5 TO 10 MPH WITH GUSTS TO 18 MPH.
                    WIND EASING TO 4 TO 8 MPH BY MIDNIGHT. THE ONSHORE
                    GRADIENT WILL INCREASE DURING THE NIGHT SO THE
                    DIURNAL DOWN-SLOPE MAY NOT DEVELOP AT ALL.
CWR.................ZERO.
HAINES INDEX(HIGH)..5 (MODERATE).
HAINES INDEX(MID)...5 (MODERATE).
LAL.................1.


.THURSDAY...
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
                    LATE MORNING AND AFTERNOON.
MAX TEMPERATURE.....60 TO 65.
MIN HUMIDITY........40-50 PERCENT.
WIND (20 FT)........20-FOOT WINDS.......
    VALLEYS/LWR SLOPES...WEST TO NORTHWEST 4 TO 8 MPH IN THE MORNING THEN
                         8 TO 14 MPH. AFTERNOON GUSTS UP TO 25 MPH.
CWR.................ZERO.
HAINES INDEX(HIGH)..3 (VERY LOW).
HAINES INDEX(MID)...4 (LOW).
LAL.................1.

.EXTENDED...
.FRIDAY...MOSTLY CLOUDY. LOWS 40 TO 45. HIGHS NEAR 60. MINIMUM
RH 40 TO 50 PERCENT. WEST TO NORTHWEST DAYTIME WIND 7 TO 12 MPH.
GUSTS TO 20 MPH.
.SATURDAY AND SUNDAY...MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS.
LOWS 40 TO 45. HIGHS IN THE MID TO UPPER 50S. MINIMUM 50 TO 60 PERCENT.
WEST TO NORTHWEST DAYTIME 7 TO 14 MPH.


$$
FORECASTER...WEISHAAR
REQUESTED BY...JOHN HECKMAN
REASON FOR REQUEST...WILDFIRE
.TAG 20100824.SCOTT.01/PQR