457
FNUS76 KPDT 191056
FWSPDT

Spot Forecast for North Cayuse...WFS
National Weather Service Pendleton OR
356 AM PDT Sun Jul 19 2026

Forecast is based on forecast start time of 0600 PDT on July 19.
***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...Relative humidities will be in the upper-teens to
the low 20 percent range. Winds will generally be light in
nature at less than 12 mph. A brief 15 mph gusts is possible.
Winds will be mostly terrain driven in the very early morning
hours. Overnight recoveries will be poor to low end moderate.

.TODAY...

Sky/weather.........Sunny (15-25 percent). Patchy smoke in the
                    morning.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....83-88.
Min humidity........15-20 percent.
Wind (20 ft)........Light winds becoming northwest 5 to 10 mph
                    by 10 AM.
Ridgetop wind.......Light winds becoming northwest 7 to 12 mph
                    by 10 AM.
Mixing height.......4200 ft AGL.
Transport winds.....South 5 to 10 mph shifting to the west 5 to 10
                    mph early in the morning.
Ventilation Index...Low (40-50) increasing to moderate (260-280) in
                    the afternoon.

TIME (PDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............61     65     71     77     81     84
RH..............50     46     40     31     24     21
20 ft wind......S 4    NW 4   NW 6   NW 7   NW 8   NW 8
20 ft wind gust.       5      7      10     11     11

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent). Areas of smoke.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....65-70.
Max humidity........28-33 percent.
Wind (20 ft)........North winds 5 to 10 mph, then becoming southeast
                    4 to 9 mph by 10 PM.
Ridgetop wind.......North winds 7 to 12 mph, then becoming southeast
                    7 to 12 mph by 10 PM.
Mixing height.......3100 ft AGL early in the evening.
Transport winds.....Northwest 5 to 10 mph shifting to the
                    northeast 5 to 10 mph early in the evening,
                    then shifting to the southeast 6 to 11 mph late
                    in the evening.
Ventilation Index...Low (60-70) decreasing to low (30) overnight.

.MONDAY...

Sky/weather.........Mostly cloudy (75-85 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....83-88.
Min humidity........20-25 percent.
Wind (20 ft)........Light winds becoming north 5 to 10 mph by 10 AM.
Ridgetop wind.......Light winds becoming north 7 to 12 mph by 10 AM.
Mixing height.......4300 ft AGL early in the morning.
Transport winds.....Southeast 5 to 10 mph shifting to the north 5
                    to 10 mph early in the morning.
Ventilation Index...Low (30) increasing to low (170-180) in the
                    afternoon.

$$
Forecaster...Day
Requested by...IC
Type of request...WILDFIRE
.TAG 2617422.3/PDT
.DELDT 07/19/26
.FormatterVersion 2.0.0
.EMAIL robert_nix@bia.gov,SydneyThompson@ctuir.org,michael_s_smith@firenet.gov