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FNAK79 PAFG 171700
FWSAFG

Spot Forecast for 901 Ptarmigan Complex...Bureau of Land Management
National Weather Service Fairbanks AK
900 AM AKDT Thu Jul 17 2025

Forecast is based on forecast start time of 0700 AKDT on July 17.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
A high pressure ridge has strengthened over the eastern Interior.
Humidities remain up this morning due to the recent light rainfall.
A warming and drying trend develops Thursday into Saturday. We have
lowered the forecast for afternoon humidities the next couple days.
Winds will remain light through the weekend. The atmosphere will
become more unstable each day supporting an increase in fire activity.
There will also be an increasing chance for isolated showers and
thunderstorms over the higher terrain each afternoon. Saturday
afternoon could have scattered shower and thunderstorm coverage.
Beyond this weekend...a moist southwest flow is expected to develop
next week with more widespread light rain expected Monday into Tuesday.

.REST OF TODAY...
Sky/weather.........Partly sunny (60-70 percent). A slight chance of
                    rain showers later this afternoon.
CWR.................1 percent.
Tstm Coverage.......None.
Max temperature.....Around 70.
Min humidity........37 percent.
Wind (20 ft)........Northeast winds 2 to 6 mph.
Ridgetop wind.......Northeast 5 mph.
Mixing height.......800 ft AGL increasing to 4000 ft AGL in the
                    late morning and afternoon.
Transport winds.....North around 5 mph.
Inversion burnoff...Around noon AKDT.

.TONIGHT...
Sky/weather.........Mostly cloudy (50-60 percent). A slight chance of
                    rain showers.
CWR.................2 percent.
Tstm Coverage.......None.
Min temperature.....Around 46.
Max humidity........86 percent.
Wind (20 ft)........East winds 2 to 6 mph.
Ridgetop wind.......East 5 mph.
Mixing height.......3800 ft AGL decreasing to 400 ft AGL in the
                    late evening and overnight.
Transport winds.....Northeast around 3 mph.
Inversion setup.....Around 2200 AKDT.

.FRIDAY...
Sky/weather.........Partly sunny (50-60 percent). Scattered rain showers
                    and isolated thunderstorms in the afternoon.
CWR.................5 percent.
Tstm Coverage.......Isolated.
Max temperature.....Around 73.
Min humidity........31 percent.
Wind (20 ft)........East winds 3 to 7 mph. Gusty and erratic winds expected
                    near any thunderstorms.
Ridgetop wind.......East 5 mph.
Mixing height.......400 ft AGL increasing to 5200 ft AGL in the
                    late morning and afternoon.
Transport winds.....Northeast around 5 mph.
Inversion burnoff...Around 1000 AKDT.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...
Mostly cloudy with scattered showers and thunderstorms. Lows in the
lower 50s. Highs in the upper 70s. Northeast winds around 8 mph.
.SUNDAY...
Partly cloudy. Isolated showers and thunderstorms possible. Lows in the
lower 50s. Highs in the mid 70s. Light winds.
.MONDAY...
Mostly cloudy with scattered showers. Lows in the mid 50s. Highs
in the lower 70s. West winds around 10 mph.

$$
Forecaster...CHRIEST
Requested by...Upper Yukon Zone
Type of request...WILDFIRE
.TAG 2516410.8/AFG
.DELDT 07/17/25
.FormatterVersion 2.0.0
.EMAIL 2025.ptarmigancomplex@firenet.gov,kerry_webster@firenet.gov,akyfdc@firenet.gov,rbradley@blm.gov