453
FNUS76 KPDT 151346
FWSPDT

Spot Forecast for North Cayuse...WFS
National Weather Service Pendleton OR
646 AM PDT Wed Jul 15 2026

Forecast is based on forecast start time of 1000 PDT on July 15.
***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...Mainly dry weather is expected through Thursday, though there
is a low  (<20 percent) chance of an afternoon or evening thunderstorm today.

MIN RH values will be around 20 percent today and around 30 percent on
Thursday, with moderate overnight recoveries around 45 to 50 percent.

.TODAY...

Sky/weather.........Sunny (10-20 percent). There is a low (<20%) chance
                    of afternoon thunderstorms.
CWR.................5 percent.
Chance of lightning.9 percent.
Max temperature.....87-94.
Min humidity........18-23 percent.
Wind (20 ft)........Northeast winds around 5 mph shifting to the
                    north 5 to 8 mph late in the morning.
Ridgetop wind.......West winds 5 to 10 mph in the morning becoming east
                    5 to 10 mph by noon then northeast in the afternoon.
Mixing height.......9100 ft AGL.
Transport winds.....Northeast 6 to 10 mph.
Ventilation Index...High (530-570) in the afternoon.

TIME (PDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM
Chc of ltng (%).0   0   0   0   0   0   0   10  10  10  10  10
Temp............77  80  83  85  87  89  89  89  90  87  86  82
RH..............33  31  28  26  24  24  23  23  23  25  25  28
20 FT wind dir..NE  N   N   N   N   N   NE  NE  N   N   NW  E
20 FT wind spd..6   7   7   8   8   8   8   8   8   7   7   6
20 FT wind gust.    8   10  12  13  14  13  13  11  10  8   7

.TONIGHT...

Sky/weather.........Mostly clear (20-30 percent). A low (<20%) chance
                    of thunderstorms in the evening.
CWR.................5 percent.
Chance of lightning.9 percent.
Min temperature.....65-68.
Max humidity........44-49 percent.
Wind (20 ft)........North winds 5 to 8 mph shifting to the
                    northwest 5 to 7 mph early in the evening,
                    shifting to the southeast 5 to 7 mph
                    late in the evening.
Ridgetop wind.......East wind 5 to 10 mph with gusts to around 15
                    mph in the evening becoming light overnight.
Mixing height.......500 ft AGL in the evening and overnight then
                    500 ft AGL early in the morning.
Transport winds.....Northeast 7 to 10 mph shifting to the south 7
                    to 9 mph overnight.
Ventilation Index...Moderate (260-280) decreasing to low (30)
                    overnight.

.THURSDAY...

Sky/weather.........Mostly sunny (20-30 percent). Slight chance of
                    showers early in the morning.
CWR.................0 percent.
Chance of lightning.14 percent.
Max temperature.....84-91.
Min humidity........28-33 percent.
Wind (20 ft)........Light winds becoming west 5 to 10 mph early in
                    the morning.
Ridgetop wind.......Light winds becoming west 10 to 15 mph with gusts
                    to 20 mph in the afternoon.
Mixing height.......4800 ft AGL.
Transport winds.....South 5 to 8 mph shifting to the west 10 to 12
                    mph late in the afternoon.
Ventilation Index...Low (50-70) increasing to moderate (280-310) in
                    the afternoon.

$$
Forecaster...Nierenberg
Requested by...IC
Type of request...WILDFIRE
.TAG 2617329.1/PDT
.DELDT 07/15/26
.FormatterVersion 2.0.0
.EMAIL michael_s_smith@firenet.gov,robert_nix@firenet.gov