FNUS76 KOTX 151947
FWSOTX

Spot Forecast for Keller Ridge Block 182...WA-CAC
National Weather Service Spokane WA
1247 PM PDT Thu Oct 15 2026

Forecast is based on ignition time of 1300 PDT on October 15. 
.DISCUSSION...

Mild temperatures the next couple days, with high pressure. 
Skies will be mostly sunny this afternoon, then higher clouds
increase tonight into Friday. Strong inversions develop around 
sunset and inversions lift near 1000-1100 hours. A dry cold 
front is forecast to push in Saturday between late morning to 
early afternoon, with slightly stronger winds, better mixing 
and the start of a slow cooling trend.
 
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). 
***************************************************************

.REST OF TODAY...

Sky/weather.........Sunny. 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....Around 62. 
Min humidity........34-38 percent. 
Wind (20 ft)........Southeast winds 4 to 7 mph.
Mixing height.......2000 ft AGL. 
Transport winds.....Southeast around 6 mph. 
Ventilation Index...Low (177). 

.TONIGHT...

Sky/weather.........Partly cloudy. 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Min temperature.....Around 40. 
Max humidity........77 percent. 
Wind (20 ft)........Northeast winds 4 to 6 mph. 
Mixing height.......Dropping to near surface after 1900. 
Transport winds.....East 7 to 9 mph. 
Ventilation Index...Low (40). 

.FRIDAY...

Sky/weather.........Partly cloudy 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....Around 62. 
Min humidity........31 percent. 
Wind (20 ft)........East winds around 5 mph shifting to the 
                    southeast 5 to 8 mph in the afternoon with
                    gusts to 13 mph
Mixing height.......Near the surface in the morning, with the 
                    inversion lifting after 1000-1000, rising
                    to 2500 ft AGL in the afternoon. 
Transport winds.....East around 7 mph shifting to the south around 
                    9 mph in the afternoon. 
Ventilation Index...Moderate (238). 

$$
Forecaster...MSC
Requested by...Ron Salas
Type of request...PRESCRIBED
.TAG 2623856.0/OTX
.DELDT 10/15/26
.FormatterVersion 2.0.0
.EMAIL twila.leith-monaghan.mtf@colvilletribes.com