FNUS76 KSEW 232123
FWSSEW

Spot Forecast for Backbone fire...IIMT-AUS/NZ IMT #3
National Weather Service Seattle WA
223 PM PDT Sun Aug 23 2026

Forecast is based on forecast start time of 1500 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 are in the forecast throughout the
period. Low-level onshore flow will switch offshore on Monday as
an upper-level ridge builds into the region in concert with a
surface thermal trough. As a result, warmer temperatures and near-
critical min RHs are possible across the incident area on Monday.


.REST OF TODAY...

Sky/weather.........Sunny (15-25 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....Around 73. 
Min humidity........57 percent. 
Wind (20 ft)........Southwest winds 5 to 8 mph. 
Mixing height.......3400 ft AGL. 
Transport winds.....West around 8 mph. 
Rainfall amount.....0.00 inches. 
Ceiling (KFT).......25. 
Visibility..........10. 

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent). Patchy smoke 
                    overnight. 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Min temperature.....Around 56. 
Max humidity........78 percent. 
Wind (20 ft)........Northwest winds around 5 mph in the evening 
                    becoming light. 
Mixing height.......400 ft AGL. 
Transport winds.....North around 4 mph. 
Rainfall amount.....0.00 inches. 
Ceiling (KFT).......25. 
Visibility..........10 decreasing to 6 overnight. 

.MONDAY...

Sky/weather.........Sunny (5-15 percent). Patchy smoke. 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....Around 88. 
Min humidity........25 percent. 
Wind (20 ft)........Light winds. 
Mixing height.......5500 ft AGL. 
Transport winds.....Southeast around 7 mph. 
Rainfall amount.....0.00 inches. 
Ceiling (KFT).......25. 
Visibility..........6. 

$$
Forecaster...McMillian
Requested by...Situation Unit Leader
Type of request...WILDFIRE
.TAG 2619416.15/SEW
.DELDT 08/23/26
.FormatterVersion 2.0.0
.EMAIL Jordan_Jobson@firenet.gov