905
FNUS76 KOTX 312251
FWSOTX

Spot Forecast for Kaiser Canyon...USFS
National Weather Service Spokane WA
351 PM PDT Mon Aug 31 2026

Forecast is based on forecast start time of 0600 PDT on September 01.
.DISCUSSION...

Tuesday will remain dry and warm, but an approaching system will
bring more clouds and some breezy conditions in the afternoon. Rain
chances move in Tuesday overnight into Wednesday, becoming more
becoming likely by Wednesday evening into Thursday.  A chance
for thunderstorms also develops; chances will be less than 10%
Wednesday and increase to 10-20% Thursday. Rain amounts by
Thursday night into Friday morning between 0.25 to 0.50" are possible.
Cooler temperatures and good to excellent RH recoveries come to the
area for middle and late week.


If conditions become unrepresentative, contact the National Weather
Service.
***************************************************************
Forecasts for 20 foot wind speeds (valleys and ridge tops) are
10 minute averages reflecting RAWS wind.
***Ventilation Index is derived from transport wind
   multiplied by the mixing height divided by 100.
   Categories: low (< 200), moderate (200-500),
   high (500-800), and very high (> 800).
***************************************************************

.TUESDAY...

Sky/weather.........Partly sunny.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....Ridgetops: 70-76.
                    Valleys: 77-83.
Min humidity........Ridgetops: 27-35 percent.
                    Valleys: 22-26 percent.
Wind (20 ft)........East winds 5 to 8 mph shifting to the south 7
                    to 11 mph with gusts to around 17 mph in the
                    afternoon...increasing to south-southwest
                    10 to 15 mph with gusts to 22 mph after 1500.
Mixing height.......3500 ft AGL increasing to 6000 ft AGL in the
                    afternoon.
Transport winds.....East around 6 mph shifting to the south around
                    13 mph in the afternoon.
Ventilation Index...Low (192) increasing to very high (802) in the
                    afternoon.

.TUESDAY NIGHT...

Sky/weather.........Mostly cloudy. Areas of smoke and haze. A 20
                    to 30% chance of rain showers overnight.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....Ridgetops: 48-52
                    Valleys: 54-57.
Max humidity........Ridgetops: 78-86
                    Valleys: 72-77 percent.
Wind (20 ft)........Southwest winds 10 to 15 mph with gusts to 20 mph
                    in the evening...becoming east-southwest 3 to 6 mph
                    from late evening into the overnight.
Mixing height.......4500 ft AGL falling to 500 ft AGL.
Transport winds.....South 8 to 11 mph.
Ventilation Index...High (531) decreasing to low (38) overnight.

.WEDNESDAY...

Sky/weather.........Mostly cloudy. A 40 to 50% chance of rain
                    showers during the day, increasing to 60-80%
                    toward late Wednesday evening into the
                    overnight.
CWR.................30 percent.
Chance of lightning.5 percent.
Max temperature.....Ridgetops: 56-63.
                   Valleys: 64-72.
Min humidity........Ridgetops: 55-63 percent.
                    Valleys: 37-54 percent.
Wind (20 ft)........Southeast winds 5 to 7 mph in the morning...
                    increasing to south 11to 17 mph with up to
                    30 mph in the afternoon.
Mixing height.......3500 ft AGL increasing to 7500 ft AGL in the
                    afternoon.
Transport winds.....South 10 to 16 mph.
Ventilation Index...Moderate (360) increasing to very high (1090)
                    in the afternoon.

$$
Forecaster...MSC
Requested by...Bill Coates
Type of request...WILDFIRE
.TAG 2620531.7/OTX
.DELDT 08/31/26
.FormatterVersion 2.0.0
.EMAIL william_coates@firenet.gov