220 
FNUS76 KPDT 300245
FWSPDT

Spot Forecast for Butte Creek...WSA
National Weather Service Pendleton OR
745 PM PDT Tue Jul 29 2025

Forecast is based on forecast start time of 0600 PDT on July 30. 
***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 the
   transport wind multiplied by the mixing
   height in 100's of feet. Index categories
   are a generalized indicator only.***

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

...HEAT ADVISORY IN EFFECT FROM NOON TO 11 PM PDT WEDNESDAY...

.DISCUSSION...The region remains locked under a weather pattern
favorable for afternoon showers and thunderstorms. While the bulk
of shower and thunderstorm activity is expected to remain to the
south of the fire through early Thursday morning, there remains a
slight chance for a stray cell to creep up into the vicinity of
the site Wednesday afternoon. More widespread shower and
thunderstorm coverage is then expected beginning Thursday morning. 

.WEDNESDAY...

Sky/weather.........Sunny (20-30 percent) then becoming mostly 
                    cloudy (65-75 percent). Slight chance of showers 
                    and thunderstorms late in the afternoon (10-20
                    percent). 
CWR.................0 percent. 
Chance of lightning.23 percent. 
Max temperature.....94-97. 
Min humidity........13-18 percent. 
Wind (20 ft)........Light winds becoming Northeast 5 to 10 mph early 
                    in the morning. Gusty and erratic winds 
                    expected near thunderstorms late in the 
                    afternoon. 
Ridgetop wind.......Northeast winds 6 to 12 mph.  
Mixing height.......10600 ft AGL. 
Transport winds.....Northeast 6 to 10 mph shifting to the Northwest
                    by the afternoon. 
Ventilation Index...Poor (70) increasing to good (700) 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     72     81     88     92     94     
RH..............54     42     30     23     20     18     
20 ft wind......N 4    NE 5   NE 5   NE 7   NE 8   NE 8   
20 ft wind gust.6      6      6      8      11     11     

.WEDNESDAY NIGHT...

Sky/weather.........Mostly cloudy (65-75 percent). Slight chance of 
                    showers and thunderstorms (10-20 percent). 
CWR.................0 percent. 
Chance of lightning.23 percent. 
Min temperature.....63-66. 
Max humidity........56-61 percent. 
Wind (20 ft)........Northeast winds 5 to 10 mph early in the evening, 
                    shifting to the Southwest overnight. Gusty and erratic 
                    winds expected near thunderstorms. 
Ridgetop wind.......Northwest winds 6 to 12 mph.  
Mixing height.......700 ft AGL. 
Transport winds.....West-Northwest 8 to 12 mph. 
Ventilation Index...Fair (270) decreasing to poor (60) overnight. 

.THURSDAY...

Sky/weather.........Mostly cloudy (55-65 percent). Chance of showers 
                    (30-40 percent) and slight chance of thunderstorms. 
CWR.................1 percent. 
Chance of lightning.22 percent. 
Max temperature.....84-87. 
Min humidity........29-34 percent. 
Wind (20 ft)........Northwest winds 6 to 12 mph. Gusty and erratic winds 
                    expected near thunderstorms. 
Ridgetop wind.......Northwest winds 7 to 14 mph.  
Mixing height.......7200 ft AGL. 
Transport winds.....West-Northwest 8 to 16 mph. 
Ventilation Index...Poor (100) increasing to good (510) in the 
                    afternoon. 

$$
Forecaster...Evans
Requested by...Orrah David
Type of request...WILDFIRE
.TAG 2518850.0/PDT
.DELDT 07/29/25
.FormatterVersion 2.0.0
.EMAIL orrah.david@ctwsbnr.org