FNUS76 KSEW 222316
FWSSEW

Spot Forecast for Backbone fire...IIMT-AUS/NZ IMT #3
National Weather Service Seattle WA
416 PM PDT Sat Aug 22 2026

Forecast is based on forecast start time of 0600 PDT on August 23. 
If conditions become unrepresentative, contact the National Weather
Service.

Please contact our office at (206) 526-6095, if you have questions
or concerns with this forecast.

.DISCUSSION...Dry conditions return Sunday and continue through Monday. 
Low clouds Sunday AM will slowly clear between 1000-1300. Minimum RH 
values will drop into the low 30 percent range on Monday. Southwest
winds on Sunday will transition to northeast Sunday night through 
Monday AM, generally remaining light.   

.SUNDAY...

Sky/weather.........Mostly cloudy (75-85 percent) then becoming 
                    mostly sunny (35-45 percent). 
CWR.................0 percent. 
Chance of lightning.3 percent. 
Max temperature.....Around 73. 
Min humidity........53 percent. 
Wind (20 ft)........Southwest winds 5 to 10 mph. 
Mixing height.......3200 ft AGL. 
Transport winds.....West around 8 mph. 
Rainfall amount.....0.00 inches. 
Ceiling (KFT).......0.7 increasing to 12 in the afternoon. 
Visibility..........5 becoming 10 in the afternoon. 

.SUNDAY NIGHT...

Sky/weather.........Mostly clear (10-20 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Min temperature.....Around 55. 
Max humidity........79 percent. 
Wind (20 ft)........Southwest winds around 5 mph becoming
                    northeast around 4 mph. 
Mixing height.......400 ft AGL. 
Transport winds.....North around 3 mph. 
Rainfall amount.....0.00 inches. 
Ceiling (KFT).......25. 
Visibility..........10. 

.MONDAY...

Sky/weather.........Sunny (5-15 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....Around 87. 
Min humidity........30 percent. 
Wind (20 ft)........Northeast around 5 mph becoming light
                    late in the morning. 
Mixing height.......5200 ft AGL. 
Transport winds.....Southeast around 6 mph. 
Rainfall amount.....0.00 inches. 
Ceiling (KFT).......25. 
Visibility..........10. 

$$
Forecaster...DeFlitch
Requested by...Situation Unit Leader
Type of request...WILDFIRE
.TAG 2619416.14/SEW
.DELDT 08/22/26
.FormatterVersion 2.0.0
.EMAIL Jordan_Jobson@firenet.gov