565
FNUS76 KPDT 222241
FWSPDT

Spot Forecast for S390_Training...NOAA
National Weather Service Pendleton OR
341 PM PDT Thu May 22 2025

Forecast is based on ignition time of 1619 PDT on May 22.
***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...Mostly dry and cool conditions forecast through
Friday as a couple weak weather system pass overhead. Excellent
overnight RH recovery is expected.

.REST OF TODAY...

Sky/weather.........Partly to mostly cloudy (40-70 percent).
CWR.................1.
Chance of lightning.1.
Max temperature.....55-58.
Min humidity........54-59 percent.
Wind (20 ft)........Northwest winds 4-7 mph with gusts of 10-15 mph.
Ridgetop wind.......Northwest winds 5-8 mph with gusts of 15-20 mph.
Mixing height.......4000-4500 ft AGL.
Transport winds.....West-northwest 9-12 mph.
Ventilation Index...Fair (215).

.TONIGHT...

Sky/weather.........Partly to mostly cloudy (30-60 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....36-39.
Max humidity........81-86 percent.
Wind (20 ft)........Northwest winds 3-7 mph with gusts of 10-15 mph
                    early evening.
Ridgetop wind.......Northwest winds 4-8 mph with gusts of 10-15 mph
                    early evening.
Mixing height.......Decreasing to near surface overnight.
Transport winds.....Northwest 6-10 mph.
Ventilation Index...Fair (210) decreasing to poor (30) overnight.

.FRIDAY...

Max temperature.....60-63.
Min humidity........41-46 percent.
Wind (20 ft)........Light winds becoming northwest 4-6 mph with
                    gusts up to 12 mph in the afternoon.
Ridgetop wind.......Light winds becoming northwest 5-8 mph with
                    gusts up to 15 mph in the afternoon.
Ventilation Index...Poor (30) increasing to fair (260) in the
                    afternoon.

$$
Forecaster...Plunkett
Requested by...Matt Callihan
Type of request...PRESCRIBED
.TAG 2514369.1/PDT
.DELDT 05/22/25
.FormatterVersion 2.0.0
.EMAIL matthew.callihan@noaa.gov