973
FNUS75 KTFX 200141
FWSTFX

Spot Forecast for Sawmill...DNRC
National Weather Service Great Falls MT
741 PM MDT Tue Aug 19 2025

Forecast is based on forecast start time of 1900 MDT on August 19.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Isolated to scattered thunderstorms are expected through the rest of
the evening with the chance for thunder around the fire increasing after
8 PM and continuing through 2 AM. These storms may produce localized
heavy downpours but the main concern will be gusty and erratic winds.
Outside of thunderstorm activity, winds will remain light and variable
through the overnight hours.

Temperatures overnight will drop down into the upper 50s with humidities
recovering to around 70%. Wednesday will be another hot and dry day with
highs near 90 and minimum RH in the upper teens. A cold front is expected
to arrive late Wednesday afternoon which will provide a wind shift as
well as a chance for thunderstorms into the evening hours.


.REST OF TONIGHT...

Sky/weather.........Partly cloudy (35-45 percent). Chance of showers
and thunderstorms in the evening, then slight
chance of showers and thunderstorms overnight.
CWR.................5 percent.
Chance of thunder...34 percent.
Min temperature.....55-60.
Max humidity........64-69 percent.
Wind (20 ft)........
 Slope/valley.......North winds around 5 mph in the evening and
                    overnight becoming light. Gusty and erratic
                    winds expected near thunderstorms early in the
                    evening.
 Ridgetop...........West around 5 mph increasing to north 15 to 20
                    mph early in the evening, then shifting to the
                    northeast 10 to 15 mph late in the evening.
Mixing height.......500 ft AGL.
Transport winds.....West around 10 mph shifting to the north early
                    in the evening.


.WEDNESDAY...

Sky/weather.........Sunny (15-25 percent). Slight chance of showers
                    and thunderstorms late in the afternoon.
CWR.................5 percent.
Chance of thunder...15 percent.
Max temperature.....89-94.
Min humidity........13-18 percent.
Wind (20 ft)........
 Slope/valley.......Variable winds up to 5 mph. Gusty and erratic winds
expected near thunderstorms late in the afternoon.
 Ridgetop...........East 5 to 10 mph shifting to the south late in
                    the morning, then shifting to the southwest 10
                    to 15 mph early in the afternoon increasing to
                    west 20 to 25 mph late in the afternoon.
Mixing height.......10000 ft AGL increasing to 11500 ft AGL late in
                    the afternoon.
Transport winds.....West around 5 mph shifting to the south late in
                    the morning, then increasing to west 15 to 20
                    mph in the afternoon.


.WEDNESDAY NIGHT...

Sky/weather.........Partly cloudy (30-40 percent). Slight chance of
                    showers and thunderstorms in the evening.
CWR.................5 percent.
Chance of thunder...15 percent.
Min temperature.....51-56.
Max humidity........68-73 percent.
Wind (20 ft)........
 Slope/valley.......West winds 5 to 10 mph in the evening and
                    overnight becoming light. Gusty and erratic
                    winds expected near thunderstorms in the
                    evening.
 Ridgetop...........West 20 to 25 mph decreasing to 10 to 15 mph
                    overnight.
Mixing height.......500 ft AGL.
Transport winds.....West 15 to 20 mph becoming northwest 5 to 10
                    mph in the late evening and overnight.


.THURSDAY...

Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
Chance of thunder...1 percent.
Max temperature.....81-86.
Min humidity........15-20 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming north around 5 mph in the
                    late morning and afternoon.
 Ridgetop...........West 5 to 10 mph.
Mixing height.......10500 ft AGL.
Transport winds.....North 5 to 10 mph shifting to the west in the
                    afternoon.


$$
Forecaster...Glinskas
Requested by...Zack L
Type of request...WILDFIRE
.TAG 2520265.0/TFX
.DELDT 08/19/25
.FormatterVersion 2.0.0
.EMAIL mthdc@firenet.gov, tfx.ops@noaa.gov