Montana Fire Weather Decision Support Site

445
FNUS55 KTFX 110817
FWFTFX

Fire Weather Planning Forecast for North-Central Montana
National Weather Service Great Falls MT
217 AM MDT Mon May 11 2026

.DISCUSSION...

A cold frontal passage will bring breezy to windy conditions and
a few isolated showers or thunderstorms today, most notably along
the Hi-Line. Minimum relative humidity values will generally range
from around 25% along the Hi-Line to around 15% for areas to the
south. Localized elevated fire weather conditions will mostly be
reserved for zones 113 and 115 where the strongest winds and
driest fuels will be. The very warm, dry, and breezy to windy
conditions continue through at least mid-week. Wednesday still
looks to be the most concerning day for a more widespread brand of
elevated fire weather risk given afternoon temperatures
approaching 90 degrees, breezy to locally windy conditions, and
scattered afternoon and evening gusty showers and thunderstorms.

MTZ112-112215-
Eastern Glacier/Toole/Central/Eastern Pondera/Liberty-
217 AM MDT Mon May 11 2026

.TODAY...
* Sky/Weather...........Mostly sunny. Slight chance of showers in
the afternoon.
* Chance Lightning.......0 percent.
* Max Temperature.......65-73...57-64 higher elevations.
24 hr trend......11 degrees down...6 degrees down higher
elevations.
* Min Humidity..........19-29 percent...28-38 percent higher
elevations.
24 hr trend......15 percent up...8 percent up higher elevations.
* Wind (20 FT).
Lower Elevations...Windy. Northwest winds 20 to 25 mph.
Ridges.............Northwest winds 20 to 25 mph.
* Mixing Height.........BELOW 1000 ft agl increasing to 9000-10000
ft agl.
* Transport Winds.......Northwest 30 to 35 mph.
* CWR...................0 percent.

.TONIGHT...
* Sky/Weather...........Partly cloudy.
* Chance Lightning.......0 percent.
* Min Temperature.......37-42.
24 hr trend......11 degrees down...6 degrees down higher
elevations.
* Max Humidity..........59-69 percent.
24 hr trend......17 percent up...7 percent up higher elevations.
* Wind (20 FT).
Lower Elevations...North winds 15 to 20 mph becoming west
around 5 mph after midnight.
Ridges.............North winds 15 to 20 mph decreasing to
around 5 mph after midnight.
* Mixing Height.........7000-8000 ft agl decreasing to 500-1000 ft
agl.
* Transport Winds.......North around 30 mph becoming east 10 to 15
mph after midnight.
* CWR...................0 percent.

.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......73-78...65-73 higher elevations.
24 hr trend......9 degrees up.
* Min Humidity..........15-20 percent.
24 hr trend......9 percent down.
* Wind (20 FT).
Lower Elevations...Southeast winds 10 to 15 mph.
Ridges.............Southeast winds 10 to 15 mph.
* Mixing Height.........500-1500 ft agl increasing to 6500-7000 ft
agl.
* Transport Winds.......South 20 to 25 mph.
* CWR...................0 percent.


.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Windy. Partly cloudy. Lows in the upper 40s. Highs
in the mid 80s. South winds around 25 mph.
.THURSDAY...Not as warm. Very windy. Mostly cloudy. Chance of
showers and thunderstorms. Lows in the lower 50s. Highs around
70. West winds around 40 mph.
.FRIDAY...Very windy. Partly cloudy. Slight chance of rain. Lows
in the mid 40s. Highs in the upper 60s. West winds around 35 mph.
.SATURDAY...Partly cloudy. Slight chance of rain. Lows in the
lower 40s. Highs in the lower 60s.
.SUNDAY...Partly cloudy. Chance of snow and slight chance of
rain. Lows in the upper 30s. Highs around 60.

$$

MTZ113-112215-
Hill and Blaine Counties-
217 AM MDT Mon May 11 2026

.TODAY...
* Sky/Weather...........Mostly sunny. Slight chance of showers.
* Chance Lightning.......0 percent.
* Max Temperature.......70-75...62-67 higher elevations.
24 hr trend......8 degrees down.
* Min Humidity..........21-29 percent.
24 hr trend......11 percent up.
* Wind (20 FT).
Lower Elevations...Windy. Northwest winds 25 to 30 mph.
Ridges.............Windy. Northwest winds 20 to 30 mph.
* Mixing Height.........500-1000 ft agl increasing to 8500-10000 ft
agl.
* Transport Winds.......Northwest around 35 mph.
* CWR...................10 percent.

.TONIGHT...
* Sky/Weather...........Mostly clear.
* Chance Lightning.......0 percent.
* Min Temperature.......39-44.
24 hr trend......13 degrees down.
* Max Humidity..........60-70 percent...53-60 percent higher
elevations.
24 hr trend......25 percent up...11 percent up higher
elevations.
* Wind (20 FT).
Lower Elevations...Northwest winds 20 to 25 mph decreasing to
10 to 15 mph after midnight.
Ridges.............North winds 20 to 25 mph decreasing to
around 5 mph after midnight.
* Mixing Height.........6000-7500 ft agl decreasing to BELOW 1000
ft agl.
* Transport Winds.......Northwest around 35 mph decreasing to 15 to
20 mph after midnight.
* CWR...................0 percent.

.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......73-78...65-70 higher elevations.
24 hr trend......3 degrees up.
* Min Humidity..........15-20 percent.
24 hr trend......8 percent down.
* Wind (20 FT).
Lower Elevations...West winds around 5 mph shifting to the
southeast in the afternoon.
Ridges.............East winds around 5 mph shifting to the
south in the afternoon.
* Mixing Height.........500-2000 ft agl increasing to 8000 ft agl.
* Transport Winds.......Northwest 15 to 20 mph shifting to the west
in the afternoon.
* CWR...................0 percent.


.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Warmer, windy. Partly cloudy. Lows in the upper 40s.
Highs in the upper 80s. Southeast winds around 25 mph.
.THURSDAY...Not as warm. Very windy. Mostly cloudy. Chance of
showers and slight chance of thunderstorms. Lows in the mid 50s.
Highs in the mid 70s. West winds around 35 mph.
.FRIDAY...Windy. Partly cloudy. Slight chance of rain. Lows in
the upper 40s. Highs in the mid 70s. West winds around 30 mph.
.SATURDAY...Partly cloudy. Slight chance of rain. Lows in the mid
40s. Highs in the upper 60s.
.SUNDAY...Partly cloudy. Chance of rain. Lows around 40. Highs in
the lower 60s.

$$

MTZ114-112215-
Lewis and Clark National Forest Rocky Mountain District-
Rocky Mountain Front-
217 AM MDT Mon May 11 2026

.TODAY...
* Sky/Weather...........Mostly sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......68-74...53-63 higher elevations.
24 hr trend......6 degrees down.
* Min Humidity..........16-23 percent...28-38 percent higher
elevations.
24 hr trend......6 percent up...13 percent up higher elevations.
* Wind (20 FT).
Lower Elevations...Windy. West winds around 25 mph becoming
northwest 15 to 20 mph in the afternoon.
Ridges.............Windy. West winds 25 to 30 mph.
* Mixing Height.........500-2000 ft agl increasing to 9000-9500 ft
agl.
* Transport Winds.......West around 40 mph decreasing to around 30
mph in the afternoon.
* CWR...................0 percent.

.TONIGHT...
* Sky/Weather...........Mostly clear.
* Chance Lightning.......0 percent.
* Min Temperature.......39-44...32-39 higher elevations.
24 hr trend......7 degrees down.
* Max Humidity..........55-65 percent.
24 hr trend......14 percent up...7 percent up higher elevations.
* Wind (20 FT).
Lower Elevations...Northwest winds 15 to 20 mph decreasing to
around 5 mph after midnight.
Ridges.............Northwest winds 20 to 25 mph becoming east
around 5 mph after midnight.
* Mixing Height.........7500-8500 ft agl decreasing to BELOW 1000
ft agl.
* Transport Winds.......Northwest around 25 mph becoming northeast
10 to 15 mph after midnight.
* CWR...................0 percent.

.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......75-80...60-70 higher elevations.
24 hr trend......5 degrees up.
* Min Humidity..........16-21 percent...21-31 percent higher
elevations.
24 hr trend......1 percent up...10 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Southeast winds 10 to 15 mph.
Ridges.............Southeast winds 10 to 15 mph.
* Mixing Height.........500-1500 ft agl increasing to 5000-6500 ft
agl.
* Transport Winds.......South 15 to 20 mph.
* CWR...................0 percent.


.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Warmer. Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 80s.
South winds 20 to 25 mph.
.THURSDAY...Cooler. Strong winds. Mostly cloudy. Chance of
showers, thunderstorms and snow showers. Lows in the upper 40s.
Highs in the mid 60s. West winds around 45 mph.
.FRIDAY...Very windy. Partly cloudy. Slight chance of rain. Lows
in the lower 40s. Highs in the mid 60s. West winds around 40 mph.
.SATURDAY...Partly cloudy. Slight chance of rain and snow. Lows
in the lower 40s. Highs in the upper 50s.
.SUNDAY...Partly cloudy. Slight chance of rain and snow. Lows in
the mid 30s. Highs in the upper 50s.

$$

MTZ115-112215-
Chouteau and Fergus Counties-
217 AM MDT Mon May 11 2026

.TODAY...
* Sky/Weather...........Mostly sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......71-77...62-70 higher elevations.
24 hr trend......6 degrees down.
* Min Humidity..........17-24 percent.
24 hr trend......Unchanged.
* Wind (20 FT).
Lower Elevations...Windy. Northwest winds 20 to 25 mph.
Ridges.............Windy. Northwest winds 20 to 25 mph.
* Mixing Height.........500-1000 ft agl increasing to 9000-10500 ft
agl.
* Transport Winds.......Northwest around 35 mph.
* CWR...................0 percent.

.TONIGHT...
* Sky/Weather...........Mostly clear.
* Chance Lightning.......0 percent.
* Min Temperature.......40-45.
24 hr trend......10 degrees down.
* Max Humidity..........59-69 percent.
24 hr trend......18 percent up.
* Wind (20 FT).
Lower Elevations...North winds 20 to 25 mph becoming west
around 5 mph after midnight.
Ridges.............North winds 20 to 25 mph decreasing to
around 5 mph after midnight.
* Mixing Height.........6500-8000 ft agl decreasing to BELOW 1000
ft agl.
* Transport Winds.......North around 30 mph becoming northwest 15
to 20 mph after midnight.
* CWR...................0 percent.

.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......72-79...63-71 higher elevations.
24 hr trend......2 degrees up.
* Min Humidity..........18-24 percent.
24 hr trend......1 percent up.
* Wind (20 FT).
Lower Elevations...Southeast winds 10 to 15 mph.
Ridges.............Southeast winds 10 to 15 mph.
* Mixing Height.........500-1500 ft agl increasing to 5500-7000 ft
agl.
* Transport Winds.......Southeast 15 to 20 mph shifting to the
south in the afternoon.
* CWR...................0 percent.


.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Warmer. Partly cloudy. Lows around 50. Highs around
90. Southeast winds 20 to 25 mph.
.THURSDAY...Not as warm. Strong winds. Mostly cloudy. Chance of
showers and thunderstorms. Lows in the mid 50s. Highs in the mid
70s. West winds around 45 mph.
.FRIDAY...Windy. Partly cloudy. Slight chance of rain. Lows in
the upper 40s. Highs in the mid 70s. West winds around 30 mph.
.SATURDAY...Partly cloudy. Slight chance of rain. Lows in the
upper 40s. Highs in the upper 60s.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 40s. Highs in the lower 60s.

$$

MTZ116-118-112215-
Lincoln Ranger District of the Helena National Forest-
Helena and Townsend Ranger Districts of the Helena National
Forest-
217 AM MDT Mon May 11 2026

.TODAY...
* Sky/Weather...........Mostly sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......68-78...57-67 higher elevations.
24 hr trend......3 degrees down.
* Min Humidity..........12-21 percent...20-30 percent higher
elevations.
24 hr trend......5 percent up.
* Wind (20 FT).
Lower Elevations...Northwest winds 20 to 25 mph.
Ridges.............Windy. Northwest winds 20 to 25 mph.
* Mixing Height.........500-2000 ft agl increasing to 8000-9500 ft
agl.
* Transport Winds.......West 30 to 35 mph.
* CWR...................0 percent.

.TONIGHT...
* Sky/Weather...........Partly cloudy.
* Chance Lightning.......0 percent.
* Min Temperature.......37-44.
24 hr trend......7 degrees down.
* Max Humidity..........52-62 percent.
24 hr trend......2 percent up.
* Wind (20 FT).
Lower Elevations...Northwest winds 20 to 25 mph becoming north
10 to 15 mph after midnight.
Ridges.............Windy. Northwest winds around 25 mph
becoming north 10 to 15 mph after midnight.
* Mixing Height.........6000-7000 ft agl decreasing to 500-2000 ft
agl early in the evening.
* Transport Winds.......Northwest around 35 mph becoming northeast
15 to 20 mph after midnight.
* CWR...................0 percent.

.TUESDAY...
* Sky/Weather...........Mostly sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......73-82...63-73 higher elevations.
24 hr trend......4 degrees up.
* Min Humidity..........14-22 percent.
24 hr trend......1 percent down.
* Wind (20 FT).
Lower Elevations...Southeast winds 10 to 15 mph.
Ridges.............Southeast winds 10 to 15 mph shifting to
the south in the afternoon.
* Mixing Height.........500-2000 ft agl increasing to 7000-8000 ft
agl.
* Transport Winds.......Southeast 15 to 20 mph shifting to the
southwest in the afternoon.
* CWR...................0 percent.


.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Windy. Partly cloudy. Slight chance of showers. Lows
in the upper 40s. Highs in the lower 80s. Southeast winds around
25 mph.
.THURSDAY...Cooler. Strong winds. Mostly cloudy. Showers likely
and chance of thunderstorms. Lows in the upper 40s. Highs in the
mid 60s. West winds around 45 mph.
.FRIDAY...Very windy. Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 40s. Highs in the mid 60s. West
winds around 35 mph.
.SATURDAY...Partly cloudy. Slight chance of rain. Lows in the
lower 40s. Highs around 60.
.SUNDAY...Partly cloudy. Slight chance of rain and snow. Lows in
the mid 30s. Highs in the upper 50s.

$$

MTZ117-112215-
Central and Eastern Lewis and Clark National Forest Areas-
217 AM MDT Mon May 11 2026

.TODAY...
* Sky/Weather...........Mostly sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......68-76...59-69 higher elevations.
24 hr trend......4 degrees down.
* Min Humidity..........15-25 percent.
24 hr trend......5 percent up.
* Wind (20 FT).
Lower Elevations...West winds 20 to 25 mph.
Ridges.............Windy. West winds 20 to 25 mph.
* Mixing Height.........500-2000 ft agl increasing to 9500 ft agl.
* Transport Winds.......West around 30 mph.
* CWR...................0 percent.

.TONIGHT...
* Sky/Weather...........Partly cloudy.
* Chance Lightning.......0 percent.
* Min Temperature.......36-44.
24 hr trend......9 degrees down.
* Max Humidity..........59-69 percent.
24 hr trend......17 percent up...23 percent up higher
elevations.
* Wind (20 FT).
Lower Elevations...North winds 20 to 25 mph becoming east
around 5 mph after midnight.
Ridges.............Windy. Northwest winds around 25 mph
becoming northeast 10 to 15 mph after midnight.
* Mixing Height.........9000 ft agl decreasing to BELOW 1000 ft
agl.
* Transport Winds.......North around 30 mph becoming east 15 to 20
mph after midnight.
* CWR...................0 percent.

.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......72-80...62-72 higher elevations.
24 hr trend......3 degrees up.
* Min Humidity..........17-26 percent.
24 hr trend......2 percent up.
* Wind (20 FT).
Lower Elevations...Southeast winds 10 to 15 mph.
Ridges.............Southeast winds 10 to 15 mph.
* Mixing Height.........500-2000 ft agl increasing to 7000-7500 ft
agl.
* Transport Winds.......Southeast 15 to 20 mph shifting to the
southwest in the afternoon.
* CWR...................0 percent.


.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Warmer, windy. Partly cloudy. Lows in the upper 40s.
Highs in the mid 80s. South winds around 25 mph.
.THURSDAY...Cooler. Strong winds. Mostly cloudy. Chance of
showers and thunderstorms. Lows in the lower 50s. Highs in the
upper 60s. West winds around 50 mph.
.FRIDAY...Very windy. Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the upper 60s. West
winds around 35 mph.
.SATURDAY...Partly cloudy. Slight chance of rain. Lows in the
lower 40s. Highs in the lower 60s.
.SUNDAY...Mostly cloudy. Chance of showers, snow and slight
chance of thunderstorms. Lows in the upper 30s. Highs in the
upper 50s.

$$

weather.gov/greatfalls