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FNUS76 KOTX 271515
FWSOTX

Spot Forecast for Rhymer Weir Machine Piles...USFWS
National Weather Service Spokane WA
815 AM PDT Tue Oct 27 2026

Forecast is based on ignition time of 0900 PDT on October 27.
.DISCUSSION...

Off and on showers under a trough of low pressure through
Wednesday night. There is a 50 percent chance of seeing wetting
precipitation overnight tonight through Wednesday. Temperatures
also cool with lowering snow levels tonight with a dusting of
wet snow by Wednesday morning. Ventilation will be moderate
this afternoon after inversion lifts around 1200. Smoke
transport will be to the north-northeast. Some mixing potential
is expected to continue tonight with light southerly 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).
***************************************************************

.TODAY...

Sky/weather.........Cloudy. A 50 percent chance of rain showers.
CWR.................15 percent.
Chance of lightning.5 percent.
Max temperature.....45.
Min humidity........79-83 percent.
Wind (20 ft)........West-Southwest winds 2 to 5 mph.
Mixing height.......Inversion breaks around 1200. Mixing height
                    increasing to 1600 ft AGL between 1400 and
                    1800 hours.
Transport winds.....Southwest 8 to 10 mph.
Ventilation Index...Moderate (230).

.TONIGHT...

Sky/weather.........Cloudy. Rain showers in the evening. Rain
                    showers transitioning to snow shower after
                    0300. Total precipitation of between 0.02
                    and 0.06 inches expected. Snow accumulation
                    of a trace expected overnight.
CWR.................10 percent.
Chance of lightning.0 percent.
Min temperature.....Around 32.
Max humidity........95-99 percent.
Wind (20 ft)........South-Southwest winds 3 to 6 mph. Gusts up
                    10 mph.
Mixing height.......1000 ft AGL.
Transport winds.....South 9 to 12 mph.
Ventilation Index...Low (86).

.WEDNESDAY...

Sky/weather.........Cloudy. A 70 percent chance of a mix rain and
                    snow showers. Additional precipitation of
                    between 0.04 and 0.10 inches expected. A trace
                    of snow expected.
CWR.................40 percent.
Chance of lightning.0 percent.
Max temperature.....40.
Min humidity........90-94 percent.
Wind (20 ft)........South-Southwest winds 2 to 5 mph.
Mixing height.......Increasing to 1500 ft AGL in the afternoon.
Transport winds.....South 6 to 9 mph.
Ventilation Index...Low (98).

$$
Forecaster...SVH
Requested by...Jordan Reeves
Type of request...PRESCRIBED
.TAG 2624625.0/OTX
.DELDT 10/27/26
.FormatterVersion 2.0.0
.EMAIL jordan_reeves@fws.gov