771
FNUS75 KBYZ 282351
FWSBYZ

Spot Forecast for West Fork...USFS
National Weather Service Billings MT
551 PM MDT Thu Aug 28 2025

Forecast is based on forecast start time of 1800 MDT on August 28.
If conditions become unrepresentative...contact the National Weather
Service.

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

.DISCUSSION...

Showers and thunderstorms are most likely through 2200 MDT tonight,
with heavy rain and erratic wind gusts up to 40 mph as the main
threats. Then, the chance of showers or storms decreases to less
than 20% through Friday morning. Much of the atmospheric moisture
allowing heavy rain moves east of the site during this time. After
1100 MDT Friday, the chance of precipitation increases to around
30% for showers and 20% for thunderstorms through 1900 MDT Friday,
although the chance of at least 0.1" of rain remains below 10%.
Conditions will trend drier and warmer Friday evening into the
weekend, with minimum humidities falling into the 30s by
Saturday afternoon. An isolated thunderstorm or two will remain
possible (15% chance) over the mountains Saturday afternoon.

.TONIGHT...

Sky/weather.........Mostly cloudy. Chance of showers and
                    thunderstorms in the evening. Slight chance of
                    rain showers overnight. Patchy fog overnight.
CWR.................20 percent.
Chance of lightning.32 percent.
Min temperature.....36-40.
Max humidity........96-100 percent.
Wind (20 ft)........
 Slope/valley.......West winds 6 to 10 mph in the evening becoming
                    light. Gusty and erratic winds expected near
                    thunderstorms in the evening.
 Ridgetop...........West around 15 mph.
Mixing height.......Decreasing to 700 ft AGL overnight.
Transport winds.....West around 10 mph.

.FRIDAY...

Sky/weather.........Partly sunny. Patchy fog in the morning. Slight
                    chance of rain showers in the morning, then
                    chance of rain showers and slight chance of
                    thunderstorms in the afternoon.
CWR.................6 percent.
Chance of lightning.19 percent.
Max temperature.....60-64.
Min humidity........41-45 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming northwest winds 5 to 10 mph
                    with gusts up to 20 mph in the afternoon. Gusty
                    and erratic winds expected near thunderstorms.
 Ridgetop...........Northwest around 20 mph.
Mixing height.......700 ft AGL early in the morning increasing to
                    7100 ft AGL in the afternoon.
Transport winds.....Northwest around 15 mph.

.FRIDAY NIGHT...

Sky/weather.........Partly cloudy. Slight chance of showers and
                    thunderstorms in the evening.
CWR.................Less than 5 percent.
Chance of lightning.15 percent.
Min temperature.....38-42.
Max humidity........84-88 percent.
Wind (20 ft)........
 Slope/valley.......North winds 6 to 10 mph in the evening becoming
                    light. Gusty and erratic winds expected near
                    thunderstorms in the evening.
 Ridgetop...........Northwest around 15 mph.
Mixing height.......6800 ft AGL early in the evening decreasing to
                    400 ft AGL overnight.
Transport winds.....Northwest around 10 mph.

.SATURDAY...

Sky/weather.........Sunny. Slight chance of showers and
                    thunderstorms in the afternoon.
CWR.................Less than 5 percent.
Chance of lightning.15 percent.
Max temperature.....61-65.
Min humidity........33-37 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming northwest 5 to 8 mph in
                    the afternoon. Gusty and erratic winds expected
                    near thunderstorms in the afternoon.
 Ridgetop...........Northwest around 10 mph.
Mixing height.......600 ft AGL early in the morning increasing to
                    7800 ft AGL in the afternoon.
Transport winds.....Northwest around 9 mph.

$$
Forecaster...Archer
Requested by...Joe Domitrovich
Type of request...WILDFIRE
.TAG 2520413.8/BYZ
.DELDT 08/28/25
.FormatterVersion 2.0.0
.EMAIL joseph_domitrovich@firenet.gov