345 
FNUS76 KPDT 170615
FWSPDT

Spot Forecast for Guard School RX...USFS
National Weather Service Pendleton OR
1115 PM PDT Mon Jun 16 2025

Forecast is based on ignition time of 0600 PDT on June 17. 
***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 (58-63%) overnight humidity recoveries Tuesday
morning ahead of a weak system that will bring elevated winds by
late afternoon as minimum humidities improve about 10% from
Monday. Winds will briefly subside overnight with excellent
(75-82%) overnight recoveries expected into Wednesday morning. A 
more substantial system on Wednesday will bring slightly more 
clouds and breezy conditions during peak afternoon hours as 
minimum humidities continue to improve. 

.TUESDAY...

Sky/weather.........Sunny (0-10 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....Around 80. 
Min humidity........22-27 percent. 
Wind (20 ft)........West winds 3 to 7 mph becoming 6 to 12 mph 
                    with gusts to around 18 mph after noon, 
                    peaking between 4 PM and 8 PM. 
Mixing height.......5600 ft AGL. 
Transport winds.....West 9 to 17 mph. 
Ventilation Index...Poor (110) increasing to good (670) 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............51     59     70     74     77     78     
RH..............58     46     36     29     26     23     
20 ft wind......SW 4   W 4    W 5    W 6    W 8    W 10    
20 ft wind gust.6      7      8      10     14     16     

.TUESDAY NIGHT...

Sky/weather.........Mostly clear (5-15 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Min temperature.....55-58. 
Max humidity........73-78 percent. 
Wind (20 ft)........West winds 6 to 12 mph with gusts up to 22 
                    mph before 10 PM. West winds 3 to 7 mph overnight. 
Mixing height.......600 ft AGL. 
Transport winds.....West 12 to 17 mph. 
Ventilation Index...Fair (430) decreasing to poor (80) overnight. 

.WEDNESDAY...

Sky/weather.........Sunny (5-15 percent). 
CWR.................0 percent. 
Chance of lightning.1 percent. 
Max temperature.....74-77. 
Min humidity........30-36 percent. 
Wind (20 ft)........West winds 5 to 10 mph becoming 8 to 16 mph with gusts 
                    up to 26 mph after noon, peaking between 1 PM and 5 PM.
Mixing height.......5500 ft AGL. 
Transport winds.....West 13 to 20 mph. 
Ventilation Index...Poor (190) increasing to excellent (740) in the 
                    afternoon. 

$$
Forecaster...Callihan
Requested by...Andrew Bellairs
Type of request...PRESCRIBED
.TAG 2516077.0/PDT
.DELDT 06/17/25
.FormatterVersion 2.0.0
.EMAIL richard.lancaster@usda.gov,Chad.core@usda.gov,andrew.s.bellairs@usda.gov