747
FNUS76 KPDT 121129
FWSPDT

Spot Forecast for Little Dean 16...USFS
National Weather Service Pendleton OR
429 AM PDT Tue May 12 2026

Forecast is based on ignition time of 0700 PDT on May 12.
***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 transport wind
   multiplied by the mixing height in 100`s of ft.
   Categories are a generalized indicator only:
   low (< 200), moderate (200-500), high (500-700),
   and very high (> 700).                           ***

If you have questions or concerns with this forecast, please
contact our office at (541) 276-8134.

.DISCUSSION...

Surface winds will remain out of the south through about 10 pm
This Evening before shifting out of the west. Look for afternoon
relative humidity for fall to around 15 percent and recover
overnight to about 50%.  Wednesday will become windy with scattered
rain showers and isolated thunderstorms creating risk for
erratic winds and lightning.

.REST OF TODAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
Chance of lightning.3 percent.
Max temperature.....81-84.
Min humidity........13-18 percent.
Wind (20 ft)........Light winds becoming southeast 5 to 13 mph with
                    gusts to around 20 mph in the late morning and
                    afternoon.
Ridgetop wind.......Light winds becoming southeast 7 to 15 mph with
                    gusts to around 25 mph in the late morning and
                    afternoon.
Mixing height.......7500 ft AGL.
Transport winds.....Southeast 5 to 8 mph increasing to south 14 to
                    20 mph late in the morning.
Ventilation Index...Low (50) increasing to very high (930) in the
                    afternoon.

TIME (PDT)      7 AM   9 AM   11 AM  1 PM   3 PM   5 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............54     62     68     77     79     80
RH..............43     33     26     22     19     17
20 ft wind......S 4    SE 6   SE 11  SE 12  S 12   S 11
20 ft wind gust.5      7      17     18     20     19

.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent) then becoming
                    mostly cloudy (65-75 percent).
CWR.................0 percent.
Chance of lightning.5 percent.
Min temperature.....51-54.
Max humidity........47-52 percent.
Wind (20 ft)........South winds 5 to 10 mph with gusts to around 18
                    mph shifting to the southwest 5 to 13 mph with
                    gusts to around 26 mph overnight.
Ridgetop wind.......South winds 7 to 13 mph with gusts to around 24
                    mph shifting to the southwest 7 to 15 mph with
                    gusts to around 30 mph overnight.
Mixing height.......500 ft AGL.
Transport winds.....South 10 to 14 mph.
Ventilation Index...Moderate (270) decreasing to low (60)
                    overnight.

.WEDNESDAY...

Sky/weather.........Partly sunny (65-75 percent). Chance of rain
                    showers. Slight chance of thunderstorms late
                    in the morning.
CWR.................12 percent.
Chance of lightning.20 percent.
Max temperature.....60-63.
Min humidity........34-39 percent.
Wind (20 ft)........West winds 10 to 20 mph becoming 15 to 25 mph
                    late in the afternoon. Gusts up to 40 mph.
                    Gusty and erratic winds expected near
                    thunderstorms late in the morning.
Ridgetop wind.......West winds 8 to 20 mph becoming 20 to 30 mph
                    late in the afternoon. Gusts up to 50 mph.
                    Gusty and erratic winds expected near
                    thunderstorms late in the morning.
Mixing height.......6300 ft AGL.
Transport winds.....Southwest 14 to 23 mph shifting to the west
                    around 24 mph late in the afternoon.
Ventilation Index...Moderate (340) increasing to very high (1050)
                    in the afternoon.

$$
Forecaster...Russell
Requested by...Kira Santulli
Type of request...PRESCRIBED
.TAG 2613395.1/PDT
.DELDT 05/12/26
.FormatterVersion 2.0.0
.EMAIL neil.fletcher@usda.gov,kira.santulli@usda.gov,lane.mcdonald@usda.gov,brett.johnson@usda.gov