822 
FNUS76 KPDT 190344
FWSPDT

Spot Forecast for SILLUSI...BLM
National Weather Service Pendleton OR
844 PM PDT Fri Jul 18 2025

Forecast is based on forecast start time of 2100 PDT on July 18. 
***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.

...RED FLAG WARNING IN EFFECT UNTIL 10 PM PDT THIS EVENING...

.DISCUSSION...Breezy southwest winds will continue to impact the
fire site tonight, with sustained winds up to 15 mph redeveloping
by tomorrow afternoon. Winds Sunday will be locally breezy in the
afternoon. Afternoon RHs will dip into the upper teens tomorrow
and Sunday, with good overnight recoveries. Weak inversions
developing overnight will keep smoke closer to surface, but winds
tonight will push smoke away from fire area. Inversions will break
after 8-9AM.

.REST OF TONIGHT...

Sky/weather.........Mostly cloudy (50-60 percent) then becoming 
                    mostly clear (20-30 percent). 
CWR.................0 percent. 
Chance of lightning.1 percent. 
Min temperature.....62-65. 
Max humidity........50-55 percent. 
Wind (20 ft)........Southwest winds 12 to 18 mph with gusts to
					around 24 mph, decreasing to 7 to 13 mph 
					around 11PM. 
Ridgetop wind.......Southwest winds 13 to 20 mph with gusts to
					around 24 mph, becoming 9 to 14 mph around
					11PM.
Mixing height.......600 ft AGL. 
Transport winds.....West 12 to 21 mph. 
Ventilation Index...Good (540) decreasing to poor (80) overnight. 

TIME (PDT)      9 PM   11 PM  1 AM   3 AM   5 AM   7 AM   
Chc of ltng (%).0      0      0      0      0      0      
Temp............80     74     69     67     63     66     
RH..............38     41     47     48     54     52     
20 ft wind......SW 17  SW 13  SW 12  SW 11  SW 8   SW 10  
20 ft wind gust.23     18     18     14     13     13     

.SATURDAY...

Sky/weather.........Mostly sunny (30-40 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....89-92. 
Min humidity........18-23 percent. 
Wind (20 ft)........Southwest winds 6 to 12 mph increasing to 
					9 to 15 mph with gusts to around 22 mph
					around 10AM. 
Ridgetop wind.......Southwest winds 6 to 12 mph increasing to
					11 to 17 mph with gusts to around 24 mph
					around 10AM.
Mixing height.......7000 ft AGL. 
Transport winds.....West 12 to 21 mph. 
Ventilation Index...Poor (170) increasing to excellent (940) in the 
                    afternoon. 

.SATURDAY NIGHT...

Sky/weather.........Partly cloudy (25-35 percent) then becoming 
                    mostly cloudy (55-65 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Min temperature.....61-64. 
Max humidity........53-58 percent. 
Wind (20 ft)........Southwest winds 9 to 14 mph decreasing to 5 to 
                    10 mph after 10PM. 
Ridgetop wind.......Southwest winds 10 to 15 mph decreasing to 
					5 to 10 mph after 10PM.
Mixing height.......500 ft AGL. 
Transport winds.....West 12 to 21 mph. 
Ventilation Index...Good (540) decreasing to poor (60) overnight. 

.SUNDAY...

Sky/weather.........Partly sunny (65-75 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....85-88. 
Min humidity........19-24 percent. 
Wind (20 ft)........Southwest winds 5 to 12 mph. 
Ridgetop wind.......Southwest winds 7 to 15 mph.
Mixing height.......6700 ft AGL. 
Transport winds.....Southwest 12 to 15 mph. 
Ventilation Index...Poor (150) increasing to good (600) in the 
                    afternoon. 

$$
Forecaster...Lawhorn
Requested by...CRAWFORD CUNNINGHAM
Type of request...WILDFIRE
.TAG 2518252.0/PDT
.DELDT 07/18/25
.FormatterVersion 2.0.0
.EMAIL wacwc@firenet.gov