FNUS76 KPDT 091046
FWSPDT

Spot Forecast for Greenhorn...USFS
National Weather Service Pendleton OR
346 AM PDT Thu Jul 9 2026

Forecast is based on forecast start time of 0400 PDT on July 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 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...Weak inversion breaks around 0700 with a cooler (-1)
and drier (-3%) day ahead. Winds will shift from northwest to 
west mid-afternoon, shifting back to the northwest in the evening.
Another inversion sets up around 2100 and breaks around 0700 
Friday. Winds increase Friday morning and peak between 1300-1700, 
becoming more from the northwest as winds subside through the 
evening.

.REST OF TONIGHT...

Sky/weather.........Clear (0-5 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Min temperature.....Around 50. 
Max humidity........49-54 percent. 
Wind (20 ft)........Northwest winds 5 to 10 mph. 
Ridgetop wind.......Northwest winds 5 to 10 mph. 
Mixing height.......500 ft AGL early in the morning. 
Transport winds.....Northwest around 10 mph. 
Ventilation Index...Low (45). 

.TODAY...

Sky/weather.........Sunny (0-5 percent). Patchy smoke in the 
                    afternoon. 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....Around 70. 
Min humidity........15-20 percent. 
Wind (20 ft)........Northwest winds 4 to 8 mph then from the 
                    west around 1400, returning northwest at 
                    1900. 
Ridgetop wind.......Northwest winds 5 to 10 mph then from the 
                    west around 1400, returning northwest at 
                    1900. 
Mixing height.......5900 ft AGL. 
Transport winds.....West around 9 mph. 
Ventilation Index...Low (100) increasing to moderate (400) in the 
                    afternoon. 

.TONIGHT...

Sky/weather.........Clear (0-5 percent). Areas of smoke in the 
                    evening. 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Min temperature.....50-53. 
Max humidity........33-38 percent. 
Wind (20 ft)........Northwest winds 5 to 10 mph becoming 2 to 6
                    mph after 0100.
Ridgetop wind.......Northwest winds 6 to 12 mph becoming 3 to 7
                    mph after 0100. 
Mixing height.......600 ft AGL in the evening. 
Transport winds.....Northwest around 8 mph. 
Ventilation Index...Moderate (200) decreasing to low (30) 
                    overnight. 

.FRIDAY...

Sky/weather.........Sunny (0-10 percent). Patchy smoke in the 
                    afternoon. 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....70-73. 
Min humidity........19-24 percent. 
Wind (20 ft)........Light winds becoming southwest 5 to 10 mph 
                    around 0800 then west 10 to 15 mph with
                    gusts up to 20 mph after 1100.
Ridgetop wind.......Light winds becoming southwest 6 to 12 mph 
                    around 0800 then west 12 to 17 mph with gusts
                    up to 23 mph after 1000 
Mixing height.......9800 ft AGL early in the morning. 
Transport winds.....Southwest around 13 mph. 
Ventilation Index...Low (50) increasing to very high (1050) in the 
                    afternoon. 

$$
Forecaster...Callihan
Requested by...IC-Turner
Type of request...WILDFIRE
.TAG 2616971.5/PDT
.DELDT 07/09/26
.FormatterVersion 2.0.0
.EMAIL orbmc@firenet.gov,kip.turner@usda.gov,kevin.bomberger@usda.gov