297
FNUS76 KPDT 241303
FWSPDT

Spot Forecast for Monument Fire...Forest Service
National Weather Service Pendleton OR
603 AM PDT Mon Aug 24 2026

Forecast is based on forecast start time of 0800 PDT on August 24.
***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...Dry and warm conditions will persist over the fire
through the period. Winds will be primarily from the E 5-8 mph
with humidity in the low 20%. Inversion will break after 0800.
Winds overnight will be from the NE 5-8 mph with recoveries in
the upper 20%. Tuesday the inversion will break after 0800 with
S winds 5-7 mph shifting to the SW after 1100, then shifting
to the N 5-6 mph after 1600. Humidity will be in the upper teens.

.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent). Patchy smoke late in the
                    afternoon.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....76-79.
Min humidity........22-27 percent.
Wind (20 ft)........East winds around 5 mph after 0800, then becoming
                    southeast 5 to 8 mph in the after 1100 shifting
                    to the east 5 to 7 mph after 1700.
Ridgetop wind.......East winds around 7 mph after 0800, then becoming
                    southeast 7 to 10 mph in the after 1100 shifting
                    to the east 7 to 9 mph after 1700.
Mixing height.......5900 ft AGL.
Transport winds.....Southeast around 5 mph shifting to the
                    southwest 7 to 9 mph late in the morning, then
                    shifting to the east around 7 mph late in the
                    afternoon.
Ventilation Index...Low (40) increasing to moderate (350) in the
                    afternoon.

TIME (PDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............58  60  64  67  70  74  74  75  76  74  74  70
RH..............42  40  38  35  32  29  27  26  26  28  30  34
20 FT wind dir..E   SE  SE  SE  SE  SE  SE  SE  SE  E   NE  NE
20 FT wind spd..5   4   6   6   6   6   6   7   7   7   8   7
20 FT wind gust.6   5           7   8   10  10  10  10  11  8

.TONIGHT...

Sky/weather.........Partly cloudy (20-30 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Min temperature.....61-64.
Max humidity........27-32 percent.
Wind (20 ft)........Northeast winds 5 to 8 mph after 1800 becoming
                    light, then becoming south around 5 mph around
                    0600.
Ridgetop wind.......Northeast winds 7 to 10 mph after 1800 becoming
                    light, then becoming south around 7 mph around
                    0600.
Mixing height.......500 ft AGL.
Transport winds.....East 7 to 8 mph shifting to the south around 7
                    mph early in the morning.
Ventilation Index...Low (110) decreasing to low (30) overnight.

.TUESDAY...

Sky/weather.........Mostly sunny (20-30 percent).
CWR.................0 percent.
Chance of lightning.7 percent.
Max temperature.....81-84.
Min humidity........19-24 percent.
Wind (20 ft)........South winds 5 to 7 mph shifting to the
                    southwest after 1100, then shifting
                    to the north 5 to 6 mph after 1600.
Ridgetop wind.......South winds 7 to 9 mph shifting to the
                    southwest after 1100, then shifting
                    to the north 7 to 8 mph after 1600.
Mixing height.......7800 ft AGL increasing to 11200 ft AGL late in
                    the afternoon.
Transport winds.....South 7 to 10 mph shifting to the northwest
                    late in the afternoon.
Ventilation Index...Low (60) increasing to very high (810) in the
                    afternoon.

$$
Forecaster...Bennese
Requested by...William Sliger
Type of request...WILDFIRE
.TAG 2620335.0/PDT
.DELDT 08/24/26
.FormatterVersion 2.0.0
.EMAIL eric.crawford@usda.gov,brady.mock@usda.gov,williamsliger24@gmail.com