353
FNUS76 KOTX 282347
FWSOTX

Spot Forecast for Kaiser Canyon / Modrite...SE Washington Type 3 Team
National Weather Service Spokane WA
447 PM PDT Mon Sep 28 2026

Forecast is based on forecast start time of 0600 PDT on September 29.

.DISCUSSION...

A weather system moving through the region on Tuesday will bring
gusty west to southwest winds. Wind gusts up to 30 mph are
forecast over the fire area with the strongest winds on upper
slopes and ridgetops. Minimum RHs will trend wetter Tuesday, and
overnight RH recoveries Tuesday night will be good to excellent.
Winds will subside Tuesday night into Wednesday, and afternoon RHs
will trend drier again Wednesday as the weather system exits.

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.........Mostly cloudy.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....65-71.
Min humidity........49-54 percent.
Wind (20 ft)........South 2-5 mph in the morning becoming southwest
                    5-10 mph after 1000 hours, then becoming
                    west-southwest 11-14 mph with gusts of 25-30
                    mph after 1400 hours.
Mixing height.......Inversion lifting around 0830 hours. Mixing
                    height increasing to 2500 ft AGL in the
                    afternoon.
Transport winds.....South-southwest 15-20 mph in the morning
                    becoming west-southwest 30-35 mph after 1200
                    hours.
Ventilation Index...Moderate (260) increasing to high (614) in the
                    afternoon.

.TUESDAY NIGHT...

Sky/weather.........Mostly cloudy in the evening becoming mostly
                    clear overnight.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....40-45.
Max humidity........80-85 percent.
Wind (20 ft)........West 2-5 mph in the evening becoming variable
                    1-4 mph after 0100 hours.
Mixing height.......Falling to near surface around 1900 hours.
Transport winds.....West 12-18 mph in the evening becoming variable
                    5-8 mph after 0100 hours.
Ventilation Index...Moderate (346) decreasing to low (34)
                    overnight.

.WEDNESDAY...

Sky/weather.........Mostly sunny.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....66-72.
Min humidity........28-33 percent.
Wind (20 ft)........Northwest winds 4-7 mph.
Mixing height.......Increasing to 5500 ft AGL in the afternoon.
Transport winds.....Northwest 6-10 mph.
Ventilation Index...Moderate (281).

$$
Forecaster...RFKS
Requested by...David Winter
Type of request...WILDFIRE
.TAG 2622713.0/OTX
.DELDT 09/28/26
.FormatterVersion 2.0.0
.EMAIL david_winter@firenet.gov