553
FNUS76 KSEW 220019
FWSSEW

Spot Forecast for Miners Fire...U.S. Forest Service
National Weather Service Seattle WA
519 PM PDT Fri Aug 21 2026

Forecast is based on forecast start time of 1800 PDT on August 21.
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.

...RED FLAG WARNING IN EFFECT FROM 5 AM TO 8 PM PDT SATURDAY...

.DISCUSSION...Elevated to critical fire weather conditions at the
incident site through Saturday night as a Red Flag Warning has
been issued for thunderstorms. An upper level low offshore will
move through the area early Saturday morning, bringing a 25-30%
chance of thunderstorms in and around the incident site throughout
the afternoon and evening hours. In any thunderstorms that
develop, likely could see abundant lightning, and gusty, erratic
winds that could worsen fire conditions locally. The main
thunderstorm threat will diminish heading into Sunday, with light
shower activity remaining near the incident site. Onshore flow
will continue throughout the period, maintaining generally good
relative humidity recoveries in the area.

.TONIGHT...

Sky/weather.........Cloudy (85-95 percent). Slight chance of rain
                    overnight.
CWR.................0 percent.
Chance of lightning.11 percent.
Min temperature.....Around 61.
Max humidity........74 percent.
Wind (20 ft)........Southeast winds 5 to 6 mph.
Mixing height.......400 ft AGL.
Transport winds.....Southeast around 8 mph.
Rainfall amount.....0.01 inches.
Ceiling (KFT).......25 decreasing to 11 overnight.
Visibility..........5 increasing to 10 overnight.

.SATURDAY...

Sky/weather.........Partly sunny (65-75 percent). Chance of showers
                    and slight chance of thunderstorms in the
                    morning, then showers likely and chance of
                    thunderstorms in the afternoon.
CWR.................12 percent.
Chance of lightning.31 percent.
Max temperature.....Around 73.
Min humidity........67 percent.
Wind (20 ft)........Light winds becoming west 7 to 9 mph in the
                    afternoon. Gusty and erratic winds expected
                    near thunderstorms.
Mixing height.......2100 ft AGL.
Transport winds.....West around 8 mph.
Rainfall amount.....0.03 inches.
Ceiling (KFT).......7.3 increasing to 8.7 in the afternoon.
Visibility..........6.

.SATURDAY NIGHT...

Sky/weather.........Mostly cloudy (65-75 percent). Chance of rain
                    showers and slight chance of thunderstorms in
                    the evening. Chance of rain overnight.
CWR.................4 percent.
Chance of lightning.19 percent.
Min temperature.....Around 52.
Max humidity........92 percent.
Wind (20 ft)........West winds 6 to 7 mph. Gusty and erratic winds
                    expected near thunderstorms in the evening.
Mixing height.......900 ft AGL.
Transport winds.....West around 10 mph.
Rainfall amount.....0.01 inches.
Ceiling (KFT).......10 lowering to 3.5.
Visibility..........10 lowering to 5.


.SUNDAY...

Sky/weather.........Mostly sunny (40-50 percent). Slight chance of
                    rain in the morning.
CWR.................0 percent.
Chance of lightning.5 percent.
Max temperature.....Around 63.
Min humidity........81 percent.
Wind (20 ft)........West winds 6 to 8 mph.
Mixing height.......2300 ft AGL.
Transport winds.....West around 10 mph.
Rainfall amount.....0.00 inches.
Ceiling (KFT).......5 to 10 rising around 15 in the afternoon.
Visibility..........6.

$$
Forecaster...Mazurkiewicz
Requested by...Mitchell Forte
Type of request...WILDFIRE
.TAG 2619848.6/SEW
.DELDT 08/21/26
.FormatterVersion 2.0.0
.EMAIL Robin.Nuyen@usda.gov,Mitchell.Forte@usda.gov