705 
FNUS76 KPDT 251629
FWSPDT

Spot Forecast for DMPRC RX...DoD
National Weather Service Pendleton OR
929 AM PDT Thu Sep 25 2025

Forecast is based on ignition time of 0900 PDT on September 26. 
***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...Good to moderate (55-65%) overnight humidity
recoveries Friday morning as a weak inversion breaks between 0900
and 1000. High pressure moves over the fire area from the west to
promote sunny skies and dry conditions. The exiting cold front and
incoming high pressure will create a north-south pressure gradient
across the region, leading to windy morning conditions that will
slacken through the afternoon. Overnight humidity recoveries look
to degrade 5-8% from Friday morning to Saturday morning, as weak 
inversion redevelops around 2200 Friday night. 

.FRIDAY...

Sky/weather.........Sunny (0-10 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....70-74. 
Min humidity........21-26 percent. 
Wind (20 ft)........West winds 10 to 15 mph with gusts up to 25
                    mph before 1200 then shifting to the 
                    southwest 5 to 10 mph with gusts up to 15
                    mph, peaking before 1000.
Mixing height.......4200 ft AGL. 
Transport winds.....West 8 to 17 mph. 
Ventilation Index...Poor (50) increasing to fair (420) in the 
                    afternoon. 

TIME (PDT)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0   
Temp............54  58  61  64  67  70  72  71  69  66  62  59  
RH..............50  42  37  32  28  26  25  25  26  29  33  37  
20 FT wind dir..W   W   W   W   SW  SW  SW  SW  SW  SW  SW  W   
20 FT wind spd..14  13  12  11  9   9   8   8   8   8   6   7   
20 FT wind gust.22  20  19  18  15  13  11  11  11  11  10  10  

.FRIDAY NIGHT...

Sky/weather.........Mostly clear (15-25 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Min temperature.....51-54. 
Max humidity........54-60 percent. 
Wind (20 ft)........West winds 5 to 10 mph shifting to the northwest 
                    3 to 7 mph after 2200.
Mixing height.......3500 ft AGL early in the evening. 
Transport winds.....West 7 to 10 mph. 
Ventilation Index...Poor (130) decreasing to poor (30) overnight. 

$$
Forecaster...Callihan
Requested by...Jeremy Johnson
Type of request...PRESCRIBED
.TAG 2522525.0/PDT
.DELDT 09/25/25
.FormatterVersion 2.0.0
.EMAIL jeremy.d.johnson151.civ@zrmy.mil