913
FNUS76 KPDT 271245
FWSPDT

Spot Forecast for Swauk Creek Fire...USFS
National Weather Service Pendleton OR
545 AM PDT Fri Sep 27 2024

Forecast is based on forecast start time of 0700 PDT on September 27.
***Thunderstorms imply gusty and erratic winds***
***Winds are 20 foot 10-minute averages***
***CWR-Chance of wetting rain 0.10 or greater***

If you have questions or concerns with this forecast, please
contact our office at (541) 276-8134.

.DISCUSSION...Ridging occurs today to provide dry and mostly sunny
skies across the fire area. High temperatures will increase about
3 degrees from yesterday as afternoon humidities improve by 5 to
10%. Winds will be from the west by 9 AM and peak between noon
and 3 PM and become light and variable after 7 PM. Clouds increase
into Saturday as a system approaches the coast with good
overnight recoveries. Highs bump up another 4 degrees as afternoon
humidities drop 1-4% on Saturday. Winds will be similar to
Friday, but will turn from the south by 10 AM then from the west
between 2 PM and 3 PM through the remainder of the period.



.REST OF TODAY...

Sky/weather.........Mostly sunny (30-40 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....65-68.
Min humidity........30-35 percent.
Wind (20 ft)........Light, variable winds becoming west 4 to 8
                    mph early in the morning.
Ridgetop wind.......Light, variable winds becoming west 5 to 10
                    mph with gusts up to 15 mph in exposed
                    areas.
Mixing height.......2800 ft AGL.
Transport winds.....West 10 to 17 mph shifting to the northwest
                    around 7 mph late in the afternoon.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (PDT)      7 AM   9 AM   11 AM  1 PM   3 PM   5 PM
Temp............49     51     56     62     64     63
RH..............86     78     54     40     35     37
20 ft wind......NW 4   W 5    W 8    W 8    W 8    W 7
20 ft wind gust.8      10     12     13     12     10

.TONIGHT...

Sky/weather.........Partly cloudy (20-30 percent) then becoming
                    mostly cloudy (50-60 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....46-49.
Max humidity........63-68 percent.
Wind (20 ft)........West winds 4 to 8 mph early in the evening
                    becoming light and variable late.
Ridgetop wind.......West winds 5 to 10 mph with gusts up to 15
                    mph early in the evening becoming north
                    northeast around 5 mph late.
Mixing height.......500 ft AGL in the evening then 500 ft AGL
                    overnight.
Transport winds.....Northwest around 7 mph shifting to the
                    northeast around 6 mph late in the evening.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

.SATURDAY...

Sky/weather.........Partly sunny (55-65 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....69-72.
Min humidity........28-33 percent.
Wind (20 ft)........Light winds becoming south 4 to 8 mph late in
                    the morning, then shifting to the west 5 to 10
                    mph late in the afternoon.
Ridgetop wind.......Light winds becoming south 5 to 10 mph late in
                    the morning, then shifting to the west 6 to 12
                    mph with gusts up to 16 mph late in the
                    afternoon.
Mixing height.......2800 ft AGL.
Transport winds.....East 5 to 6 mph shifting to the southwest 7 to
                    8 mph late in the morning, then shifting to the
                    west around 13 mph late in the afternoon.
Haines Index........3 to 5 or very low to moderate potential for
                    large plume dominated fire growth.

$$
Forecaster...Callihan
Requested by...Rachel Granberg
Type of request...WILDFIRE
.TAG 2422869.11/PDT
.DELDT 09/27/24
.FormatterVersion 2.0.0
.EMAIL rachel.granberg@usda.gov