310 
FNUS76 KPDT 090924
FWSPDT

Spot Forecast for Mission Creek...BIA
National Weather Service Pendleton OR
224 AM PDT Tue Sep 9 2025

Forecast is based on forecast start time of 0700 PDT on September 09. 
***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.

.DISCUSSION...A slowly approaching weather system will bring 
another round of afternoon and early evening showers and 
thunderstorms today. Storms could produce gusty winds, small 
hail, and brief downpours. Although locally wetting rains are 
possible, overall CWRs remain generally low. Moisture from this 
system will foster both good RH recoveries overnight and minimum 
RHs today around 45 percent. Light winds will continue this 
morning and again overnight, northerly during the afternoon and 
evening.

.TODAY...

Sky/weather.........Partly sunny (50-60 percent). Slight chance of 
                    rain showers in the morning. Chance of rain 
                    showers and slight chance of thunderstorms late 
                    in the afternoon. 
CWR.................1 percent increasing to 12 percent late in the 
                    afternoon. 
Chance of lightning.22 percent. 
Max temperature.....70-73. 
Min humidity........43-48 percent. 
Wind (20 ft)........Light winds becoming west 5 to 7 mph early in 
                    the morning, then shifting to the northwest 5 
                    to 8 mph late in the morning. Gusty and erratic 
                    winds expected near thunderstorms late in the 
                    afternoon. 
Ridgetop wind.......Northwest around 5 mph increasing to 6 to 8 mph
                    late in the afternoon. 
Mixing height.......3100 ft AGL early in the morning. 
Transport winds.....Southwest around 6 mph shifting to the north 8 
                    to 9 mph late in the afternoon. 
Ventilation Index...Poor (30) increasing to fair (210) in the 
                    afternoon. 

TIME (PDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 
Chc of ltng (%).10  10  10  10  10  10  10  20  20  20  20  20  
Temp............58  60  60  61  63  65  67  68  68  68  70  68  
RH..............68  64  65  64  63  58  53  50  49  48  49  51  
20 FT wind dir..S   W   W   W   NW  NW  NW  NW  NW  NW  NW  NW  
20 FT wind spd..4   5   5   5   7   7   7   7   7   7   5   5   
20 FT wind gust.6   7   7   7   10  10  10  11  11  11  8   8   

.TONIGHT...

Sky/weather.........Mostly cloudy (55-65 percent) then becoming 
                    partly cloudy (35-45 percent). Chance of 
                    showers and slight chance of thunderstorms in 
                    the evening, then slight chance of showers late 
                    in the evening. Chance of showers early in the 
                    morning. 
CWR.................12 percent decreasing to 0 percent late in the 
                    evening. 
Chance of lightning.22 percent. 
Min temperature.....Around 60. 
Max humidity........69-74 percent. 
Wind (20 ft)........Northwest winds 5 to 7 mph early in the evening 
                    becoming light. Gusty and erratic winds 
                    expected near thunderstorms in the evening. 
Ridgetop wind.......Northwest around 7 mph in the evening easing
                    to around 5 mph. 
Mixing height.......1600 ft AGL early in the evening. 
Transport winds.....North around 8 mph shifting to the southwest 5 
                    to 6 mph early in the evening. 
Ventilation Index...Poor (50) decreasing to poor (30) overnight. 

$$
Forecaster...NWS Seattle
Requested by...IC
Type of request...WILDFIRE
.TAG 2521613.0/PDT
.DELDT 09/09/25
.FormatterVersion 2.0.0
.EMAIL orbmc@firenet.gov