Suppression Forecast
Issued by NWS Portland, OR

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FNUS76 KPQR 220023
FWSPQR

Spot Forecast for Eagle Creek West...USFS MH
National Weather Service Portland OR
523 PM PDT Thu Sep 21 2017

Forecast is based on request time of 0600 PDT on September 22.
If conditions become unrepresentative...contact the National Weather
Service Portland, Oregon office.

...DRYING TREND BEGINNING FRIDAY...
...OFFSHORE PATTERN POSSIBLE MIDDLE OF NEXT WEEK...

.DISCUSSION...High pressure will build into Northwest
Oregon Friday and Saturday, which will result in
North to Northeast flow aloft. The combination of
light wind, moist ground and clearing skies will
provide the potential for fog formation at the west
end of the Gorge and also above the Gorge in the
higher terrain early Friday morning and again Saturday
morning. Expect a gradual warming trend over the
next couple of days, but daytime temperatures are
expected to remain slightly below normal.

SEE EXTENDED DISCUSSION BELOW IN THE EXTENDED FORECAST
SECTION.

.FRIDAY...

Sky/weather.........Cloudy in the morning with areas of
                    fog then partly to mostly cloudy.
CWR.................0 percent.
LAL.................1.
Max temperature.....62-67, but 56-61 above 1500 ft.
Min humidity........45-55 percent, but 55-65 percent above 1500
                    feet and sheltered slopes.
Wind (20 ft)........
 Slope/valley.......Columbia Gorge: Variable to 5 mph in the
                    morning then West to Northwest 4 to 7 mph.

                    Elsewhere: Up-slope less than 5 mph in the
                    morning then 3 to 7 mph in the afternoon.
Haines Index(High)..2 (very low).
Rainfall amount.....0.00 inches.

.FRIDAY NIGHT...

Sky/weather.........Partly cloudy. Areas of fog after midnight.
CWR.................0 percent.
LAL.................1.
Min temperature.....40-45.
Max humidity........Above 85 percent.
Wind (20 ft)........
 Slope/valley.......Columbia Gorge: West to Northwest 4 to 7 mph
                    in the early evening then light and variable.

                    Elsewhere: Up-slope 2 to 6 mph early evening then
                    local drainage to 5 mph.
Haines Index(High)..2 (very low).
Rainfall amount.....0.00 inches.

.SATURDAY...

Sky/weather.........Sunny in the morning then becoming partly cloudy.
                    Areas of morning fog and low clouds.
CWR.................0 percent.
LAL.................1.
Max temperature.....66-71, but 61-66 above 1500 ft.
Min humidity........40-45 percent, but to 55 percent
                    sheltered slopes and drainage bottoms.
Wind (20 ft)........
 Slope/valley.......Columbia Gorge: Light wind in the morning then
                    West to Northwest 4 to 8 mph.

                    Elsewhere: Up-slope to 6 mph.
Haines Index(High)..2 (very low).
Rainfall amount.....0.00 inches.

.FORECAST DAYS 3 THROUGH 7...

.DISCUSSION...A weak disturbance moves across Western Washington
and far Northwest Oregon Sunday, which will help to maintain
onshore low-level flow. Daytime temperatures get close to seasonal
values early next week. The upper ridge offshore strengthens Tuesday
through at least the middle of next week. Models show a surface
thermal trough developing over the Oregon Coast Range into the
Southwest Washington interior valleys by Wednesday. There is the
potential for east wind to develop Wednesday.


.SUNDAY...
Partly cloudy. Patchy fog. Lows 41 to 48. Highs 65 to 70, but 60 to
65 ridges. West wind to 6 mph. Minimum humidity 45-55 percent, but to
65 percent ridges.
.MONDAY...
Partly cloudy. Lows 43 to 51. Highs 68 to 73, but 62 to 67 ridges.
Southwest wind to 6 mph. Minimum humidity 45-55 percent.
.TUESDAY...
Partly cloudy. Patchy fog. Lows 46 to 54. Highs 72 to 77 but 66 to
71 ridges. Northwest wind to 5 mph. Minimum humidity 35-45 percent.
.WEDNESDAY...
Mostly clear. Patchy fog. Lows 48 to 57. Highs 74 to 81. East
wind 5 to 10 mph with gusts to 20 mph, but to 15 mph with gusts
to 35 mph far west end of the Gorge, including Corbett and Vista
House. Minimum humidity 25-35 percent but to 40 percent sheltered
slopes and valley bottoms.
.THURSDAY...
Mostly clear. Lows 50 to 58. Highs 73 to 81. East wind to 10 mph
with gusts to 20 mph, but 10 to 15 mph with gusts to 35 mph far
west end of the Gorge. Minimum humidity 30-45 percent.

$$
Forecaster...Weishaar
Requested by...FBAN
Type of request...WILDFIRE
.TAG 1716084.1/PQR
.EMAIL colin.robertson@dnr.wa.gov


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