FNUS76 KOTX 222247
FWSOTX

Spot Forecast for Hill Loop...USDA
National Weather Service Spokane WA
347 PM PDT Sat Aug 22 2026

Forecast is based on forecast start time of 0600 PDT on August 23. 

.DISCUSSION...

A robust upper low moving through the region will keep a risk for
isolated showers and thunderstorms on Sunday. A few storms could 
be strong with heavy downpours of rain/small hail and wind gusts 
around 30 mph. General winds will be breezy from the south- 
southwest in the morning and early afternoon and shift to the 
northwest around 1500 hours. Conditions dry out Sunday evening 
with a warming and drying trend Monday and Tuesday. 

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

.SUNDAY...

Sky/weather.........Partly sunny. 25% chance of rain showers in the 
                    morning, increasing to a 60% chance of rain showers
                    and a 30% chance of thunderstorms in the afternoon. 
CWR.................10 percent. 
Chance of lightning.10 percent in the morning increasing to 
                    30 percent in the afternoon.
Max temperature.....Around 75. 
Min humidity........35-40 percent. 
Wind (20 ft)........South-southwest winds 7 to 12 mph shifting to the 
                    Winds shifting to the northwest 8 to 12 mph around
                    1500 hours. Gusty and erratic winds expected near 
                    thunderstorms in the afternoon. 
Mixing height.......6500 ft AGL in the afternoon. 
Transport winds.....South around 10 mph shifting to the west in the 
                    afternoon. 
Ventilation Index...Moderate (250) increasing to high (659) in the 
                    afternoon. 

.SUNDAY NIGHT...

Sky/weather.........Partly cloudy. 
CWR.................0 percent. 
Chance of lightning.5 percent. 
Min temperature.....Around 52. 
Max humidity........78-83 percent. 
Wind (20 ft)........Northwest winds 7 to 11 mph through 1900 hours 
                    then shifting to the north 2 to 4 mph after 2000 hours.
Mixing height.......4500 ft AGL falling to near the surface
                    between 1900-2000 hours.
Transport winds.....Northwest 6 to 9 mph. 
Ventilation Index...Moderate (260) decreasing to low (28) 
                    overnight. 

.MONDAY...

Sky/weather.........Sunny. 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....Around 82. 
Min humidity........25-30 percent. 
Wind (20 ft)........East 2 to 4 mph in the morning shifting to 
                    the south-southeast 2 to 4 mph around 1300 hours.
Mixing height.......6500 ft AGL in the afternoon. 
Transport winds.....Variable 3 to 5 mph.
Ventilation Index...Moderate (242). 

$$
Forecaster...VT
Requested by...Bill Coates
Type of request...WILDFIRE
.TAG 2620245.0/OTX
.DELDT 08/22/26
.FormatterVersion 2.0.0
.EMAIL william_coates@firenet.gov,christopher.miller2@usda.gov