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FNUS76 KOTX 051046
FWSOTX

Spot Forecast for Kaiser Canyon Wildfire...USFWS
National Weather Service Spokane WA
346 AM PDT Sat Sep 5 2026

Forecast is based on forecast start time of 0700 PDT on September 05.
.DISCUSSION...

Temperatures warm by a few degrees across the fire, with the
warmest temperatures along the Columbia River. Winds will be
lighter today with diurnal directional changes this morning and
afternoon. There is a small chance for showers over the fire
tonight though any precipitation will be light (under 0.05
inches). Relative humidity recoveries will be fair to good
Saturday night. Weather trends warmer and drier on Sunday with
slightly stronger northwest winds across the western portion of
the fire in the afternoon.


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).
***************************************************************

.TODAY...

Sky/weather.........Mostly sunny.
CWR.................10 percent.
Chance of lightning.10 percent.
Max temperature.....Ridgetops:56-60.
                    Valleys:66-73.
Min humidity........Ridgetops:45-53 percent.
                    Valleys:30-40 percent.
Wind (20 ft)........North-northeast 1 to 3 mph in the morning shifting
                    to the south-southwest around 1200 and then increasing
                    to south-southwest 4 to 7 mph after 1400.
Mixing height.......6500 ft AGL in the afternoon.
Transport winds.....Northeast around 5 mph in the morning shifting
                    to the southeast in the afternoon.
Ventilation Index...Moderate (348).

.TONIGHT...

Sky/weather.........Cloudy. 35% chance of rain showers through the
                    night.
CWR.................15 percent.
Chance of lightning.10 percent.
Min temperature.....Ridgetops:41-46.
                    Valleys:45-48.
Max humidity........Ridgetops:65-75 percent.
                    Valleys:66-80 percent.
Wind (20 ft)........South 3 to 6 mph shifting to the north 2 to 5 mph
                    between 2000-2100. Sustained winds up to 8 mph
                    across ridgetops.
Mixing height.......Near the surface.
Transport winds.....Northeast 5 to 9 mph.
Ventilation Index...Moderate (241).

.SUNDAY...

Sky/weather.........Partly sunny. 30% chance of rain showers in the
                    morning, then a 20% chance of rain showers in
                    the afternoon.
CWR.................25 percent.
Chance of lightning.10 percent.
Max temperature.....Ridgetops:60-64.
                    Valleys:70-76.
Min humidity........Ridgetops:40-48 percent.
                    Valleys:25-35 percent.
Wind (20 ft)........North winds 5 to 7 mph in the morning. Winds
                    on the western side of the perimeter becoming
                    northwest 6 to 9 mph in the afternoon.
Mixing height.......7000 ft AGL in the afternoon.
Transport winds.....North around 7 mph shifting to the southwest
                    around 5 mph in the afternoon.
Ventilation Index...Moderate (341).

$$
Forecaster...VT
Requested by...Jordan Reeves
Type of request...WILDFIRE
.TAG 2621072.2/OTX
.DELDT 09/05/26
.FormatterVersion 2.0.0
.EMAIL jordan_reeves@fws.gov