235 
FNUS76 KPDT 181458
FWSPDT

Spot Forecast for Guard School RX...USFS
National Weather Service Pendleton OR
758 AM PDT Wed Jun 18 2025

Forecast is based on ignition time of 0800 PDT on June 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.

.DISCUSSION...Breezy conditions will develop this afternoon as a
weak cold front moves across the area today. Tomorrow, winds will
increase from the northwest, but will be 10mph or less. RHs will
be in the lower 30s today thanks to a slight marine push with front
and winds, but will be in the mid 20s tomorrow afternoon. Overnight
recovery will be good.

.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent). 
CWR.................0 percent. 
Chance of lightning.1 percent. 
Max temperature.....74-77. 
Min humidity........32-37 percent. 
Wind (20 ft)........West winds 3 to 7 mph increasing to 7 to 12 mph
					after 1PM with gusts up to 25 mph.
Ridgetop wind.......West winds 7 to 12 mph increasing to 12 to
					20 mph after 1PM with gusts to around 27 mph.
Mixing height.......4700 ft AGL. 
Transport winds.....West 15 to 23 mph. 
Ventilation Index...Fair (240) increasing to excellent (830) in the 
                    afternoon. 

TIME (PDT)      8 AM   10 AM  NOON   2 PM   4 PM   6 PM   
Chc of ltng (%).0      0      0      0      0      0      
Temp............58     67     72     72     72     68     
RH..............64     51     40     38     37     40     
20 ft wind......W 5    W 5    W 7    W 11   W 11   W 11   
20 ft wind gust.10     10     16     21     21     23     

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Min temperature.....46-49. 
Max humidity........67-72 percent. 
Wind (20 ft)........West winds 7 to 12 mph with gusts to around 23 
                    mph becoming west winds 3 to 8 mph after 8PM,
					then becoming drainage winds after 1AM. 
Ridgetop wind.......West winds 12 to 20 mph with gusts to around 25
					mph decreasing to 3 to 8 mph after 8PM.
Mixing height.......800 ft AGL. 
Transport winds.....West 15 to 23 mph decreasing to around 7 mph 
                    late in the evening. 
Ventilation Index...Fair (410) decreasing to poor (60) overnight. 

.JUNETEENTH...

Sky/weather.........Mostly sunny (40-50 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....73-76. 
Min humidity........25-30 percent. 
Wind (20 ft)........Drainage winds becoming northwest 5 to 10 mph 
					after 2PM. 
Ridgetop wind.......West winds 3 to 8 mph becoming light after 6AM,
					then becoming northwest winds 5 to 10 mph after
					1PM.
Mixing height.......4500 ft AGL. 
Transport winds.....West around 7 mph early in the morning becoming 
                    light, then becoming west 6 to 12 mph late in 
                    the afternoon. 
Ventilation Index...Poor (70) increasing to poor (160) in the 
                    afternoon. 

$$
Forecaster...Lawhorn
Requested by...Andrew Bellairs
Type of request...PRESCRIBED
.TAG 2516077.1/PDT
.DELDT 06/18/25
.FormatterVersion 2.0.0
.EMAIL richard.lancaster@usda.gov,Chad.core@usda.gov,andrew.s.bellairs@usda.gov