591
FNUS76 KPDT 102207
FWSPDT

Spot Forecast for Bologna...USFS
National Weather Service Pendleton OR
307 PM PDT Mon Aug 10 2026

Forecast is based on forecast start time of 1000 PDT on August 11.
***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...An inversion develops between 2200-2300 this
evening with the thermal belt around 2500 feet. Inversion breaks
up between 0700-0800 Tuesday as terrain-driven winds become
west-northwest by late morning before peaking between 1500-1800.
Inversion redevelops between 2100-2200 Tuesday night. Cooler (-3)
and less dry (+6%) conditions on Wednesday after good overnight
humidity recoveries.

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent). Areas of smoke.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....53-56.
Max humidity........48-53 percent.
Wind (20 ft)........Northwest winds 5 to 10 mph becoming light
                    after 2300.
Ridgetop wind.......Northwest winds 6 to 12 mph becoming light
                    after 2300.
Mixing height.......500 ft AGL in the evening.
Transport winds.....Northwest 5 to 10 mph becoming light.
Ventilation Index...Moderate (250) decreasing to low (30)
                    overnight.

.TUESDAY...

Sky/weather.........Sunny (10-20 percent). Areas of smoke.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....92-95.
Min humidity........14-19 percent.
Wind (20 ft)........Light downslope/downvalley winds becoming
                    west 5 to 9 mph after 1100 then northwest
                    4 to 8 mph after 1700.
Ridgetop wind.......Light winds becoming west 6 to 11 mph after
                    1100 then northwest after 1700.
Mixing height.......6400 ft AGL.
Transport winds.....Light winds becoming west 7 to 12 mph late in
                    the morning.
Ventilation Index...Moderate (410) in the afternoon.

TIME (PDT)      10 AM  NOON   2 PM   4 PM   6 PM   8 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............71     82     90     92     90     81
RH..............35     25     19     17     21     29
20 ft wind......NW 2   W 5    W 7    W 8    NW 5   NW 4
20 ft wind gust.4      7      10     12     12     8

.TUESDAY NIGHT...

Sky/weather.........Partly cloudy (20-30 percent). Areas of smoke.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....54-57.
Max humidity........65-70 percent.
Wind (20 ft)........Northwest winds 4 to 8 mph becoming light
                    after 2300.
Ridgetop wind.......Northwest winds 6 to 11 mph becoming light
                    after 2300.
Mixing height.......700 ft AGL in the evening.
Transport winds.....Northwest 5 to 12 mph becoming light.
Ventilation Index...Moderate (270) decreasing to low (30)
                    overnight.

.WEDNESDAY...

Sky/weather.........Sunny (0-10 percent). Patchy smoke.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 90.
Min humidity........19-24 percent.
Wind (20 ft)........Light downslope/downvalley winds becoming
                    northwest 5 to 10 mph after 1100.
Ridgetop wind.......Light winds becoming northwest 6 to 12 mph
                    after 1100.
Mixing height.......7100 ft AGL early in the morning.
Transport winds.....Light winds becoming west 6 to 13 mph late in
                    the morning.
Ventilation Index...Low (30) increasing to moderate (360) in the
                    afternoon.

$$
Forecaster...Callihan
Requested by...Kristen Marshall
Type of request...WILDFIRE
.TAG 2619346.1/PDT
.DELDT 08/10/26
.FormatterVersion 2.0.0
.EMAIL kristen.marshall@usda.gov