171
FNUS55 KGGW 211923
FWFGGW

Fire Weather Planning Forecast for Northeast Montana
National Weather Service Glasgow MT
123 PM MDT Fri Aug 21 2026

.DISCUSSION...

Seasonably hot temperatures with isolated thunder is expected
through Monday. Showers and thunderstorms begin Saturday night,
with overnight showers seeing wetting rains. Min RH values in the
20-40% range and good overnight recovery will mitigate fire
weather concerns through Monday, even with gusty winds. Warm and
dry conditions are expected to resume Tuesday.


MTZ134-221015-
Northern Valley and Northern Phillips Counties-
123 PM MDT Fri Aug 21 2026

.TONIGHT...
Sky/weather.........Partly cloudy (25-35 percent).
Chance of thunder...0 percent.
Min temperature.....56-61.
Max humidity........60-65 percent.
20-foot winds.......East winds 5 to 15 mph.
CWR (> 0.10 inch)...Zero.

.SATURDAY...
Sky/weather.........Mostly cloudy (45-55 percent).
Chance of thunder...0 percent.
Max temperature.....86-91.
Min humidity........24-29 percent.
20-foot winds.......Southeast winds 15 to 25 mph.
CWR (> 0.10 inch)...Zero.

.SATURDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80 percent). A chance of
                    showers after midnight.
Chance of thunder...0 percent.
Min temperature.....62-67.
Max humidity........65-70 percent.
20-foot winds.......Southeast winds 15 to 25 mph.
CWR (> 0.10 inch)...10 percent.

.SUNDAY...
Sky/weather.........Mostly cloudy (55-65 percent). A slight chance
                    of showers in the morning, then a slight chance
                    of showers and thunderstorms in the afternoon.
Chance of thunder...20 percent.
Max temperature.....89-94.
Min humidity........31-36 percent.
20-foot winds.......Southeast winds 5 to 15 mph becoming south 5 to
                    10 mph late in the afternoon.
CWR (> 0.10 inch)...10 percent.


.Forecast days 3 through 7......
.MONDAY...Partly cloudy. A chance of showers and a slight chance
of thunderstorms. Lows around 60. Highs in the lower 80s. West
winds 10 to 20 mph.
.TUESDAY...Mostly clear. Lows in the mid 50s. Highs in the lower
80s. Northwest winds 10 to 20 mph.
.WEDNESDAY...Mostly clear. Lows in the mid 50s. Highs in the
upper 80s. East winds 5 to 15 mph.
.THURSDAY...Partly cloudy. A slight chance of showers. Lows in
the upper 50s. Highs in the mid 80s.
.FRIDAY...Partly cloudy. A slight chance of showers. Lows in the
mid 50s. Highs in the mid 80s.

$$

MTZ135-221015-
The Little Rockies-
123 PM MDT Fri Aug 21 2026

.TONIGHT...
Sky/weather.........Partly cloudy (30-40 percent) then becoming
                    mostly cloudy (50-60 percent).
Chance of thunder...0 percent.
Min temperature.....65-70 valleys and 58-63 ridges.
Max humidity........51-56 percent.
20-foot winds.......
    Lower elevation......East winds 5 to 15 mph.
    Ridge............East winds 5 to 15 mph.
CWR (> 0.10 inch)...Zero.

.SATURDAY...
Sky/weather.........Partly cloudy (45-55 percent).
Chance of thunder...0 percent.
Max temperature.....90-95 valleys and 79-84 ridges.
Min humidity........30-35 percent.
20-foot winds.......
    Lower elevation......Southeast winds 10 to 20 mph.
    Ridge............Southeast winds 10 to 20 mph.
CWR (> 0.10 inch)...Zero.

.SATURDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80 percent). A slight chance
                    of showers in the evening.
Chance of thunder...0 percent.
Min temperature.....68-73 valleys and 62-67 ridges.
Max humidity........56-61 percent.
20-foot winds.......
    Lower elevation......Southeast winds 5 to 15 mph becoming
                         variable less than 5 mph early in the
                         morning.
    Ridge............Southeast winds 5 to 15 mph.
CWR (> 0.10 inch)...Less than 10 percent.

.SUNDAY...
Sky/weather.........Mostly cloudy (55-65 percent). A slight chance
                    of showers and thunderstorms in the afternoon.
Chance of thunder...20 percent.
Max temperature.....94-99 valleys and 83-88 ridges.
Min humidity........25-30 percent.
20-foot winds.......
    Lower elevation......Upslope/upvalley 2-5 mph.
    Ridge............West winds 5 to 10 mph.
CWR (> 0.10 inch)...Less than 10 percent.


.Forecast days 3 through 7......
.MONDAY...Mostly clear. A slight chance of showers. Lows in the
lower 60s. Highs in the lower 80s. West winds 5 to 15 mph.
.TUESDAY...Mostly clear. Lows in the upper 50s. Highs in the
lower 80s. Northwest winds 10 to 15 mph.
.WEDNESDAY...Mostly clear. Lows in the lower 60s. Highs in the
upper 80s. East winds 5 to 10 mph.
.THURSDAY...Partly cloudy. A slight chance of showers. Lows in
the lower 60s. Highs in the lower 80s.
.FRIDAY...Partly cloudy. A slight chance of showers. Lows in the
upper 50s. Highs in the lower 80s.

$$

MTZ136-221015-
The Lower Missouri River Breaks including the Charles M Russell
National Wildlife Refuge-
123 PM MDT Fri Aug 21 2026

.TONIGHT...
Sky/weather.........Partly cloudy (35-45 percent).
Chance of thunder...0 percent.
Min temperature.....61-66.
Max humidity........55-60 percent.
20-foot winds.......
    Lower elevation......East winds 5 to 15 mph.
    Ridge............East winds 5 to 15 mph.
CWR (> 0.10 inch)...Zero.

.SATURDAY...
Sky/weather.........Partly cloudy (45-55 percent).
Chance of thunder...0 percent.
Max temperature.....88-93.
Min humidity........24-29 percent.
20-foot winds.......
    Lower elevation......Southeast winds 10 to 20 mph.
    Ridge............Southeast winds 10 to 20 mph.
CWR (> 0.10 inch)...Zero.

.SATURDAY NIGHT...
Sky/weather.........Mostly cloudy (65-75 percent). A slight chance
                    of showers in the evening, then a chance of
                    showers and a slight chance of thunderstorms
                    after midnight.
Chance of thunder...20 percent.
Min temperature.....66-71.
Max humidity........68-73 percent.
20-foot winds.......
    Lower elevation......Southeast winds 5 to 15 mph.
    Ridge............Southeast winds 10 to 20 mph decreasing to 5
                     to 10 mph early in the morning.
CWR (> 0.10 inch)...10 percent.

.SUNDAY...
Sky/weather.........Mostly cloudy (50-60 percent). A slight chance
                    of showers in the morning.
Chance of thunder...0 percent.
Max temperature.....91-96.
Min humidity........29-34 percent.
20-foot winds.......
    Lower elevation......Upslope/upvalley 2-5 mph.
    Ridge............Southeast winds 5 to 10 mph becoming west in
                     the afternoon.
CWR (> 0.10 inch)...Less than 10 percent.


.Forecast days 3 through 7......
.MONDAY...Mostly clear. A chance of showers and a slight chance
of thunderstorms. Lows in the mid 60s. Highs in the mid 80s. West
winds 5 to 15 mph.
.TUESDAY...Mostly clear. Lows in the upper 50s. Highs in the mid
80s. Northwest winds 10 to 15 mph.
.WEDNESDAY...Mostly clear. Lows around 60. Highs in the upper
80s. East winds 5 to 10 mph.
.THURSDAY...Partly cloudy. A slight chance of showers. Lows in
the lower 60s. Highs in the mid 80s.
.FRIDAY...Partly cloudy. A slight chance of showers. Lows around
60. Highs in the mid 80s.

$$

MTZ137-221015-
Southern Petroleum and Southern Garfield Counties-
123 PM MDT Fri Aug 21 2026

.TONIGHT...
Sky/weather.........Partly cloudy (35-45 percent).
Chance of thunder...0 percent.
Min temperature.....60-65.
Max humidity........56-61 percent.
20-foot winds.......
    Lower elevation......East winds 10 to 15 mph becoming southeast
                         5 to 10 mph late in the night.
    Ridge............East winds 5 to 15 mph becoming southeast 10
                     to 20 mph late in the night.
CWR (> 0.10 inch)...Zero.

.SATURDAY...
Sky/weather.........Partly cloudy (45-55 percent).
Chance of thunder...0 percent.
Max temperature.....88-93.
Min humidity........25-30 percent.
20-foot winds.......
    Lower elevation......Southeast winds 15 to 25 mph.
    Ridge............Southeast winds 15 to 25 mph.
CWR (> 0.10 inch)...Zero.

.SATURDAY NIGHT...
Sky/weather.........Mostly cloudy (65-75 percent). A slight chance
                    of showers in the evening, then a chance of
                    showers after midnight.
Chance of thunder...0 percent.
Min temperature.....64-69.
Max humidity........70-75 percent.
20-foot winds.......
    Lower elevation......Southeast winds 10 to 20 mph.
    Ridge............Southeast winds 10 to 20 mph becoming south 5
                     to 15 mph early in the morning.
CWR (> 0.10 inch)...10 percent.

.SUNDAY...
Sky/weather.........Mostly cloudy (50-60 percent). A slight chance
                    of showers in the morning, then a slight chance
                    of showers and thunderstorms in the afternoon.
Chance of thunder...20 percent.
Max temperature.....91-96.
Min humidity........25-30 percent.
20-foot winds.......
    Lower elevation......Upslope/upvalley 2-5 mph becoming
                         upslope/upvalley 4-8 mph late in the
                         afternoon.
    Ridge............Southwest winds 5 to 10 mph becoming west in
                     the afternoon.
CWR (> 0.10 inch)...Less than 10 percent.


.Forecast days 3 through 7......
.MONDAY...Partly cloudy. A chance of showers and a slight chance
of thunderstorms. Lows in the lower 60s. Highs in the mid 80s.
Northwest winds 5 to 15 mph.
.TUESDAY...Mostly clear. Lows in the upper 50s. Highs in the mid
80s. North winds 10 to 15 mph.
.WEDNESDAY...Mostly clear. Lows in the upper 50s. Highs around
90. Southeast winds 10 to 15 mph.
.THURSDAY...Partly cloudy. A slight chance of showers. Lows in
the lower 60s. Highs in the mid 80s.
.FRIDAY...Partly cloudy. A slight chance of showers. Lows in the
upper 50s. Highs in the mid 80s.

$$

MTZ120-221015-
Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties-
123 PM MDT Fri Aug 21 2026

.TONIGHT...
Sky/weather.........Mostly clear (15-25 percent).
Chance of thunder...0 percent.
Min temperature.....52-57.
Max humidity........71-76 percent.
20-foot winds.......Northeast winds 5 to 15 mph becoming east 5 to
                    10 mph late in the night.
CWR (> 0.10 inch)...Zero.

.SATURDAY...
Sky/weather.........Partly cloudy (40-50 percent).
Chance of thunder...0 percent.
Max temperature.....83-88.
Min humidity........27-32 percent.
20-foot winds.......Southeast winds 10 to 20 mph.
CWR (> 0.10 inch)...Zero.

.SATURDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80 percent). A chance of
                    showers and a slight chance of thunderstorms
                    after midnight.
Chance of thunder...20 percent.
Min temperature.....60-65.
Max humidity........62-67 percent.
20-foot winds.......Southeast winds 10 to 20 mph.
CWR (> 0.10 inch)...10 percent.

.SUNDAY...
Sky/weather.........Mostly cloudy (60-70 percent). A chance of
                    showers and a slight chance of thunderstorms.
Chance of thunder...20 percent.
Max temperature.....85-90.
Min humidity........44-49 percent.
20-foot winds.......Southeast winds 10 to 20 mph.
CWR (> 0.10 inch)...30 percent.


.Forecast days 3 through 7......
.MONDAY...Partly cloudy. A chance of showers and thunderstorms.
Lows around 60. Highs in the mid 80s. Southwest winds 15 to
25 mph.
.TUESDAY...Mostly clear. Lows in the mid 50s. Highs in the lower
80s. Northwest winds 15 to 25 mph.
.WEDNESDAY...Mostly clear. Lows in the lower 50s. Highs in the
mid 80s. Northeast winds 10 to 15 mph.
.THURSDAY...Partly cloudy. A slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the mid 80s.
.FRIDAY...Partly cloudy. A slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s.

$$

MTZ122-221015-
Dawson/McCone/Prairie/Richland/Wibaux Counties-
123 PM MDT Fri Aug 21 2026

.TONIGHT...
Sky/weather.........Partly cloudy (25-35 percent).
Chance of thunder...0 percent.
Min temperature.....55-60.
Max humidity........69-74 percent.
20-foot winds.......Northeast winds 5 to 15 mph becoming east 5 to
                    10 mph late in the night.
CWR (> 0.10 inch)...Zero.

.SATURDAY...
Sky/weather.........Partly cloudy (40-50 percent).
Chance of thunder...0 percent.
Max temperature.....86-91.
Min humidity........24-29 percent.
20-foot winds.......Southeast winds 10 to 20 mph.
CWR (> 0.10 inch)...Zero.

.SATURDAY NIGHT...
Sky/weather.........Mostly cloudy (65-75 percent). A chance of
                    showers and a slight chance of thunderstorms
                    after midnight.
Chance of thunder...20 percent.
Min temperature.....63-68.
Max humidity........68-73 percent.
20-foot winds.......Southeast winds 10 to 20 mph.
CWR (> 0.10 inch)...20 percent.

.SUNDAY...
Sky/weather.........Mostly cloudy (55-65 percent). A chance of
                    showers and a slight chance of thunderstorms.
Chance of thunder...20 percent.
Max temperature.....88-93.
Min humidity........39-44 percent.
20-foot winds.......Southeast winds 10 to 20 mph.
CWR (> 0.10 inch)...20 percent.


.Forecast days 3 through 7......
.MONDAY...Partly cloudy. A slight chance of showers and
thunderstorms. Lows in the lower 60s. Highs in the mid 80s. West
winds 10 to 20 mph.
.TUESDAY...Mostly clear. Lows in the upper 50s. Highs in the mid
80s. Northwest winds 10 to 15 mph.
.WEDNESDAY...Mostly clear. Lows in the mid 50s. Highs in the
upper 80s. Northeast winds 10 to 15 mph.
.THURSDAY...Partly cloudy. A slight chance of showers. Lows in
the upper 50s. Highs in the mid 80s.
.FRIDAY...Partly cloudy. A slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the mid 80s.

$$

weather.gov/glasgow