549
FNUS76 KOTX 290544
FWSOTX

Spot Forecast for Tillicum_1031...USFS
National Weather Service Spokane WA
1044 PM PDT Wed Oct 28 2026

Forecast is based on ignition time of 0800 PDT on October 29.
.DISCUSSION...

Cool conditions will continue through this weekend with chances
for light precipitation Thursday night through Friday. Winds will
be fairly light at the burn site. Chances for wetting rains are
low through Friday (15 percent or less each period). Total precip
amount expected to be near 0.05-0.10 of an inch. Inversion sets in
around 1800 and breaks around 1000. Incoming high pressure into
next week will bring mild temperatures and very light winds.

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

.THURSDAY...

Sky/weather.........Mostly sunny. 10 percent chance of sprinkles
                    or snow showers through the day.
CWR.................0 percent.
Max temperature.....35.
Min humidity........70-75 percent.
Wind (20 ft)........Light and variable winds 1-3 mph becoming
                    southeast 5-10 mph around 1100.
Mixing height.......2500 ft AGL.
Transport winds.....East 5 to 10 mph.
Ventilation Index...Low (185).

.THURSDAY NIGHT...

Sky/weather.........Mostly cloudy. 20 percent chance of snow showers
                    overnight.
CWR.................10 percent.
Min temperature.....30.
Max humidity........89-94 percent.
Wind (20 ft)........Southeast winds 2-5 mph in the evening
                    becoming variable 1-3 mph around 2000 hours.
Mixing height.......Falling to near surface around 1800 hours.
Transport winds.....Northeast around 6 mph.
Ventilation Index...Low (43).

.FRIDAY...

Sky/weather.........Mostly cloudy. 50 percent chance of rain. Snow may
                    mix in with rain in the morning hours.
CWR.................15 percent.
Max temperature.....38.
Min humidity........76 percent.
Wind (20 ft)........Light and variable 1-3 mph.
Mixing height.......1600 ft AGL.
Transport winds.....Northeast around 5 mph shifting to the south in
                    the afternoon.
Ventilation Index...Low (88).

$$
Forecaster...DB
Requested by...Josh Verellen
Type of request...PRESCRIBED
.TAG 2624781.0/OTX
.DELDT 10/29/26
.FormatterVersion 2.0.0
.EMAIL joshua.verellen@usda.gov