971
FNUS76 KPDT 172337
FWSPDT

Spot Forecast for Waste Way...CWICC
National Weather Service Pendleton OR
437 PM PDT Sun May 17 2026

Forecast is based on forecast start time of 1700 PDT on May 17.
***Thunderstorms imply gusty and erratic winds      ***
***Winds are 20 foot 10-minute averages             ***
***CWR: Chance of wetting rain 0.10 or greater      ***
***Ventilation Index is derived from transport wind
   multiplied by the mixing height in 100`s of ft.
   Categories are a generalized indicator only:
   low (< 200), moderate (200-500), high (500-700),
   and very high (> 700).                           ***

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

.DISCUSSION...Dry conditions prevail with sustained winds of
around 5 to 15 mph with a small chance (5 to 15 percent) of
seeing a brief 20 mph gust, especially tonight.  Overall,
winds will be coming from the west before shifting more towards
the north on Monday. Relative humidity levels will be in the
teens today and tomorrow, with good overnight recoveries
in the 50s and 60s.

.REST OF TODAY...

Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
Chance of lightning.2 percent.
Max temperature.....70-75.
Min humidity........16-21 percent.
Wind (20 ft)........West winds 7 to 12 mph.
Ridgetop wind.......West winds 10 to 15 mph.
Mixing height.......8100 ft AGL.
Transport winds.....Northwest 7 to 12 mph.
Ventilation Index...Moderate (370).

TIME (PDT)      5PM 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............70  69  67  64  58  55  54  52  51  49  49  48
RH..............21  23  27  34  41  46  50  53  56  58  59  61
20 FT wind dir..W   WNW WNW W   W   W   W   W   W   W   W   W
20 FT wind spd..7   8   8   10  11  12  13  12  12  12  11  10
20 FT wind gust.10  10  12  13  14  16  17  17  16  14  14  13

.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent).
CWR.................0 percent.
Chance of lightning.2 percent.
Min temperature.....43-48.
Max humidity........55-60 percent.
Wind (20 ft)........West-northwest winds 7 to 12 mph shifting to the west
                    7 to 12 mph by 8 PM.
Ridgetop wind.......West-northwest winds 10 to 15 mph shifting to the west
                    10 to 15 mph by 8 PM.
Mixing height.......500 ft AGL.
Transport winds.....Northwest 9 to 14 mph.
Ventilation Index...Moderate (370) decreasing to low (40)
                    overnight.

.MONDAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Max temperature.....75-80.
Min humidity........12-17 percent.
Wind (20 ft)........Northwest winds 5 to 10 mph shifting to the
                    north 5 to 10 mph by 9 AM, then shifting to
                    the west 5 to 10 mph by 3 PM.
Ridgetop wind.......Northwest winds 9 to 14 mph shifting to the
                    north 7 to 12 mph by 9 AM, then shifting to
                    the west 7 to 12 mph by 3 PM.
Mixing height.......9300 ft AGL.
Transport winds.....Northwest 10 to 15 mph.
Ventilation Index...Low (100) increasing to moderate (380) in the
                    afternoon.

$$
Forecaster...Day
Requested by...Haley Crenshaw
Type of request...WILDFIRE
.TAG 2613888.0/PDT
.DELDT 05/17/26
.FormatterVersion 2.0.0
.EMAIL wacwc@firenet.gov