008
FNUS75 KBYZ 280108
FWSBYZ

Spot Forecast for West Fork...USFS
National Weather Service Billings MT
708 PM MDT Wed Aug 27 2025

Forecast is based on forecast start time of 1900 MDT on August 27.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office if you have questions
or concerns with this forecast.

.DISCUSSION...

Cool and wet weather will continue near the site through the
forecast period. A line of weak thunderstorms south of the site is
slowly moving north this evening and is most likely to impact the
site between 2100 MDT and midnight. The main threat with these storms
is heavy rain and gusty, erratic winds up to 40 mph. So far, observed
gusts near storms have remained around 15 to 25 mph.

Rain showers will continue through the day Thursday, with continued
concerns of heavy rain and erratic winds up to 40 mph. By Friday
evening, the chance for showers and thunderstorms falls to less
than 20%.

.TONIGHT...

Sky/weather.........Cloudy. Chance of thunderstorms in the evening.
                    Rain showers through the night. Slight chance
                    of thunderstorms overnight.
CWR.................78 percent.
Chance of lightning.35 percent.
Min temperature.....42-46.
Max humidity........98-100 percent.
Wind (20 ft)........
 Slope/valley.......South winds 5 to 8 mph. Gusty and erratic
                    winds expected near thunderstorms.
 Ridgetop...........South around 15 mph.
Mixing height.......Decreasing to 700 ft AGL overnight.
Transport winds.....South around 10 mph.

.THURSDAY...

Sky/weather.........Cloudy. Slight chance of thunderstorms in the
                    morning. Rain showers through the day. Chance
                    of thunderstorms in the afternoon.
CWR.................83 percent.
Chance of lightning.49 percent.
Max temperature.....56-60.
Min humidity........70-74 percent.
Wind (20 ft)........
 Slope/valley.......Southwest winds 5 to 8 mph. Gusty and erratic
                    winds expected near thunderstorms.
 Ridgetop...........Southwest around 15 mph.
Mixing height.......700 ft AGL early in the morning increasing to
                    4200 ft AGL in the afternoon.
Transport winds.....Southwest around 10 mph.

.THURSDAY NIGHT...

Sky/weather.........Mostly cloudy. Chance of rain showers and
                    slight chance of thunderstorms in the evening,
                    then slight chance of rain showers overnight.
CWR.................30 percent.
Chance of lightning.22 percent.
Min temperature.....38-42.
Max humidity........90-94 percent.
Wind (20 ft)........
 Slope/valley.......West winds 5 to 8 mph in the evening becoming
                    light. Gusty and erratic winds expected near
                    thunderstorms in the evening.
 Ridgetop...........West around 15 mph.
Mixing height.......4200 ft AGL early in the evening decreasing to
                    600 ft AGL overnight.
Transport winds.....West around 10 mph.

.FRIDAY...

Sky/weather.........Partly sunny. Slight chance of rain showers in
                    the morning, then chance of rain showers and
                    slight chance of thunderstorms in the
                    afternoon.
CWR.................16 percent.
Chance of lightning.18 percent.
Max temperature.....60-64.
Min humidity........46-50 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming west 5 to 8 mph in the
                    afternoon. Gusty and erratic winds expected
                    near thunderstorms in the afternoon.
 Ridgetop...........Northwest around 15 mph.
Mixing height.......600 ft AGL early in the morning increasing to
                    8600 ft AGL in the afternoon.
Transport winds.....Northwest around 10 mph.

$$
Forecaster...Archer
Requested by...Joe Domitrovich
Type of request...WILDFIRE
.TAG 2520413.7/BYZ
.DELDT 08/27/25
.FormatterVersion 2.0.0
.EMAIL joseph_domitrovich@firenet.gov