233 
FNUS76 KPDT 090224
FWSPDT

Spot Forecast for STONE...high dessert team 3
National Weather Service Pendleton OR
724 PM PDT Mon Sep 8 2025

Forecast is based on forecast start time of 2000 PDT on September 08. 
***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...Slight chance of showers and thunderstorms will
taper off tonight. Cooler and cloudy conditions continue through
tonight. Another round of showers and thunderstorms are expected
Tuesday afternoon and early evening. Gusty winds, small hail, and
brief downpours will be the main threats. Locally wetting rains
are possible. With clouds and moisture around, expect good RH
recoveries overnight, with minimum RHs during the day in the 40 to
50 percent range on Tuesday. Surface winds will be from the
west/northwest, with southerly flow aloft.

.REST OF TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent) then becoming 
                    mostly cloudy (55-65 percent). Chance for showers
					and isolated thunderstorms in the early evening.
CWR.................4 percent. 
Chance of lightning.11 percent. 
Min temperature.....51-54. 
Max humidity........85-90 percent. 
Wind (20 ft)........West winds 5 to 7 mph early in the evening 
                    becoming light. 
Ridgetop wind.......South around 10 mph. 
Mixing height.......500 ft AGL. 
Transport winds.....West 5 to 14 mph. 
Ventilation Index...Poor (140) decreasing to poor (30) overnight. 

TIME (PDT)      8 PM   10 PM  MIDNGT 2 AM   4 AM   6 AM   
Chc of ltng (%).10     10     0      0      0      10     
Temp............67     62     57     56     54     51     
RH..............55     66     75     78     82     90     
20 ft wind......W 5    W 5    W 5    SW 4   SW 4   SW 4   
20 ft wind gust.7      7      7      5      5             

.TUESDAY...

Sky/weather.........Partly sunny (55-65 percent). Chances of showers
					throughout the day, with thunderstorms possible
					in the afternoon.
CWR.................8 percent increasing to 25 percent late in the 
                    afternoon. 
Chance of lightning.25 percent. 
Max temperature.....72-75. 
Min humidity........40-50 percent. 
Wind (20 ft)........Light winds becoming northwest 5 to 7 mph 
					late in the afternoon. Gusty and erratic winds 
					expected near thunderstorms. 
Ridgetop wind.......South around 10 mph. 
Mixing height.......5200 ft AGL. 
Transport winds.....Northwest 5 to 7 mph shifting to the north 
					around 8 mph late in the afternoon. 
Ventilation Index...Poor (50) increasing to fair (230) in the afternoon. 

.TUESDAY NIGHT...

Sky/weather.........Mostly cloudy (50-70 percent). Slight chance of 
                    thunderstorms in the evening. Chance of rain 
                    showers through the night. 
CWR.................25 percent decreasing to 4 percent late in the 
                    evening. 
Chance of lightning.19 percent. 
Min temperature.....51-54. 
Max humidity........87-92 percent. 
Wind (20 ft)........Northwest winds 5 to 7 mph early in the evening 
                    becoming light. Gusty and erratic winds 
                    expected near thunderstorms.
Ridgetop wind.......South around 5 mph. 
Mixing height.......900 ft AGL in the evening then 500 ft AGL 
                    overnight. 
Transport winds.....North 5 to 8 mph shifting to the northwest 
                    around 5 mph overnight. 
Ventilation Index...Poor (90) decreasing to poor (30) overnight. 

.WEDNESDAY...

Sky/weather.........Mostly cloudy (70-80 percent). Slight chance of 
                    thunderstorms in the morning. Rain showers 
                    likely through the day. Chance of thunderstorms 
                    in the afternoon. 
CWR.................4 percent increasing to 71 percent late in the 
                    morning. 
Chance of lightning.25 percent. 
Max temperature.....Around 70. 
Min humidity........61-66 percent. 
Wind (20 ft)........Light winds becoming northwest 5 to 7 mph. 
                    Gusty and erratic winds expected near 
                    thunderstorms late in the morning. Gusty and 
                    erratic winds expected near thunderstorms late 
                    in the afternoon. 
Ridgetop wind.......South 5 to 10 mph. 
Mixing height.......3300 ft AGL early in the morning. 
Transport winds.....Northwest 5 to 6 mph shifting to the north 8 to 
                    9 mph late in the morning. 
Ventilation Index...Poor (30) increasing to fair (270) in the 
                    afternoon. 

$$
Forecaster...NWS Seattle
Requested by...chistoph
Type of request...WILDFIRE
.TAG 2521348.4/PDT
.DELDT 09/08/25
.FormatterVersion 2.0.0
.EMAIL Stacy.lauritsen@oregon.gov,orjdcc@firenet.gov,michale.j.cearns@odf.oregon.gov