789 
FNUS76 KPDT 251250
FWSPDT

Spot Forecast for Klickitat Rim Prescribed Burn...Mount Adams Resource Stewards
National Weather Service Pendleton OR
550 AM PDT Thu Sep 25 2025

Forecast is based on ignition time of 0600 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...After a dry cold front passes on Thursday, 
temperatures will cool heading into Friday, before warming back up
over the weekend as high pressure moves into the region. Winds 
will generally be light and terrain-driven, with speeds highest on
Friday and gradually decreasing through the weekend. Rain chances
then return by early next week. 

.FRIDAY...

Sky/weather.........Sunny (0-10 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....71-74. 
Min humidity........26-31 percent. 
Wind (20 ft)........Northwest winds 5 to 10 mph. 
Ridgetop wind.......Northwest winds 10 to 18 mph.  
Mixing height.......4000 ft AGL. 
Transport winds.....Northwest around 5 mph early in the morning 
                    becoming West-Southwest by the afternoon. 
Ventilation Index...Poor (30) increasing to poor (170) 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............41     42     53     61     68     71     
RH..............77     79     59     43     31     28     
20 ft wind......NW 5   NW 4   NW 4   NW 4   NW 6   NW 6   
20 ft wind gust.10     7      7      7      11     11     

.FRIDAY NIGHT...

Sky/weather.........Mostly clear (15-25 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Min temperature.....Around 50. 
Max humidity........60-65 percent. 
Wind (20 ft)........Southwest winds 5 to 8 mph. 
Ridgetop wind.......West-Northwest winds 6 to 12 mph.  
Mixing height.......3500 ft AGL early in the evening then 500 ft 
                    AGL late in the evening. 
Transport winds.....West 5 to 7 mph in the evening becoming
                    North overnight. 
Ventilation Index...Poor (100) decreasing to poor (30) overnight. 

.SATURDAY...

Sky/weather.........Mostly sunny (35-45 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....76-79. 
Min humidity........22-27 percent. 
Wind (20 ft)........Light winds becoming Northwest 5 to 8 mph by 
                    the afternoon. 
Ridgetop wind.......West-Southwest winds 6 to 12 mph.  
Mixing height.......500 ft AGL early in the morning then 3200 ft 
                    AGL late in the morning. 
Transport winds.....Light winds becoming Southwest 5 to 8 mph late 
                    in the morning. 
Ventilation Index...Poor (30) increasing to poor (120) in the 
                    afternoon. 

$$
Forecaster...Evans
Requested by...Lucas King
Type of request...PRESCRIBED
.TAG 2522503.0/PDT
.DELDT 09/25/25
.FormatterVersion 2.0.0
.EMAIL lucas@mtadamsstewards.org