Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
248
FNUS55 KTFX 180859
FWFTFX
Fire Weather Planning Forecast for North-Central Montana
National Weather Service Great Falls MT
259 AM MDT Mon Aug 18 2025
.DISCUSSION...
Isolated showers and thunderstorms are possible along the Rocky Mountain
Front and across portions of central Montana. The main hazards will be
gusty, erratic winds and lightning. Tuesday and Wednesday are expected to
get hot with highs in the 90s and minimum RH values ranging from the teens
to the mid 20s. The upper level ridge is expected to break down Wednesday
into Thursday with cooler temperatures expected through the rest of the week.
MTZ112-182300-
Eastern Glacier/Toole/Central/Eastern Pondera/Liberty-
259 AM MDT Mon Aug 18 2025
.TODAY...
* Sky/Weather...........Mostly sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......80-88...72-77 higher elevations.
24 hr trend......3 degrees up...8 degrees up higher elevations.
* Min Humidity..........23-28 percent.
24 hr trend......Unchanged...8 percent down higher elevations.
* Wind (20 FT).
Lower Elevations...Southwest winds 10 to 15 mph.
Ridges.............Southwest winds 10 to 15 mph.
* Mixing Height.........500-1000 ft agl increasing to 9000-10000 ft
agl.
* Transport Winds.......Southwest 15 to 20 mph increasing to around
25 mph in the afternoon.
* CWR...................0 percent.
.TONIGHT...
* Sky/Weather...........Mostly clear.
* Chance Lightning.......0 percent.
* Min Temperature.......54-60.
24 hr trend......3 degrees up.
* Max Humidity..........59-69 percent.
24 hr trend......7 percent down.
* Wind (20 FT).
Lower Elevations...West winds 10 to 15 mph.
Ridges.............Southwest winds 10 to 15 mph.
* Mixing Height.........8000 ft agl decreasing to 500-1000 ft agl.
* Transport Winds.......West 15 to 20 mph.
* CWR...................0 percent.
.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......87-95...78-85 higher elevations.
24 hr trend......8 degrees up.
* Min Humidity..........19-24 percent.
24 hr trend......4 percent down.
* Wind (20 FT).
Lower Elevations...West winds 10 to 15 mph shifting to the
south in the afternoon.
Ridges.............Northwest winds 10 to 15 mph shifting to
the south in the afternoon.
* Mixing Height.........500-1500 ft agl increasing to 12500 ft agl.
* Transport Winds.......West 15 to 20 mph increasing to southwest
around 25 mph in the afternoon.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Partly cloudy. Lows around 60. Highs in the upper
80s. West winds 15 to 20 mph.
.THURSDAY...Not as warm. Mostly clear. Lows in the lower 50s.
Highs in the upper 70s. Northwest winds 15 to 20 mph.
.FRIDAY...Mostly clear. Lows around 50. Highs in the mid 70s.
Northeast winds 10 to 15 mph.
.SATURDAY...Mostly clear. Lows around 50. Highs in the upper 70s.
.SUNDAY...Mostly clear. Lows in the lower 50s. Highs in the mid
80s.
$$
MTZ113-182300-
Hill and Blaine Counties-
259 AM MDT Mon Aug 18 2025
.TODAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......83-88...76-81 higher elevations.
24 hr trend......5 degrees up.
* Min Humidity..........24-33 percent.
24 hr trend......9 percent down...2 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Southwest winds around 5 mph.
Ridges.............Southwest winds around 5 mph.
* Mixing Height.........500-2000 ft agl increasing to 8000-9000 ft
agl.
* Transport Winds.......South 10 to 15 mph increasing to southwest
20 to 25 mph in the afternoon.
* CWR...................0 percent.
.TONIGHT...
* Sky/Weather...........Mostly clear.
* Chance Lightning.......0 percent.
* Min Temperature.......58-65.
24 hr trend......3 degrees up.
* Max Humidity..........64-74 percent...56-65 percent higher
elevations.
24 hr trend......10 percent down...18 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...South winds around 5 mph.
Ridges.............South winds around 5 mph.
* Mixing Height.........8500 ft agl decreasing to 500-1000 ft agl.
* Transport Winds.......South 15 to 20 mph.
* CWR...................0 percent.
.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......92-97...85-90 higher elevations.
24 hr trend......5 degrees up.
* Min Humidity..........21-30 percent.
24 hr trend......6 percent up...7 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...South winds around 5 mph.
Ridges.............South winds around 5 mph shifting to the
southwest in the afternoon.
* Mixing Height.........500-1500 ft agl increasing to 7500-9000 ft
agl.
* Transport Winds.......South 15 to 20 mph.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Partly cloudy. Lows in the lower 60s. Highs around
90. North winds 10 to 15 mph.
.THURSDAY...Not as warm. Partly cloudy. Slight chance of showers
and thunderstorms. Lows in the upper 50s. Highs in the upper 70s.
Northwest winds 15 to 20 mph.
.FRIDAY...Mostly clear. Lows in the lower 50s. Highs in the mid
70s. North winds 10 to 15 mph.
.SATURDAY...Mostly clear. Lows in the lower 50s. Highs in the
upper 70s.
.SUNDAY...Mostly clear. Lows in the lower 50s. Highs in the lower
80s.
$$
MTZ114-182300-
Lewis and Clark National Forest Rocky Mountain District-
Rocky Mountain Front-
259 AM MDT Mon Aug 18 2025
.TODAY...
* Sky/Weather...........Mostly sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......81-88...68-78 higher elevations.
24 hr trend......7 degrees up.
* Min Humidity..........23-29 percent...28-38 percent higher
elevations.
24 hr trend......2 percent down...8 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Southwest winds 10 to 15 mph.
Ridges.............Southwest winds 10 to 15 mph.
* Mixing Height.........1000-1500 ft agl increasing to 10000-11000
ft agl.
* Transport Winds.......Southwest 20 to 25 mph increasing to around
30 mph in the afternoon.
* CWR...................0 percent.
.TONIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers and
thunderstorms in the evening.
* Chance Lightning.......10 percent.
* Min Temperature.......54-59.
24 hr trend......5 degrees up.
* Max Humidity..........57-67 percent.
24 hr trend......4 percent down.
* Wind (20 FT).
Lower Elevations...Southwest winds 5 to 10 mph.
Ridges.............Southwest winds 5 to 10 mph.
* Mixing Height.........8000-9500 ft agl decreasing to 1000-1500 ft
agl early in the evening.
* Transport Winds.......Southwest 15 to 20 mph.
* CWR...................0 percent.
.TUESDAY...
* Sky/Weather...........Mostly sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......88-96...75-85 higher elevations.
24 hr trend......5 degrees up.
* Min Humidity..........16-26 percent.
24 hr trend......8 percent down...16 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Southwest winds around 5 mph shifting to
the south in the afternoon.
Ridges.............Southwest winds 10 to 15 mph.
* Mixing Height.........500-1500 ft agl increasing to 13500 ft agl.
* Transport Winds.......Southwest 15 to 20 mph increasing to around
25 mph in the afternoon.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the mid 80s. West
winds 15 to 20 mph.
.THURSDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
Northwest winds 15 to 20 mph.
.FRIDAY...Mostly clear. Lows in the upper 40s. Highs in the mid
70s. Northeast winds 10 to 15 mph.
.SATURDAY...Mostly clear. Lows in the upper 40s. Highs in the
upper 70s.
.SUNDAY...Mostly clear. Lows in the lower 50s. Highs in the lower
80s.
$$
MTZ115-182300-
Chouteau and Fergus Counties-
259 AM MDT Mon Aug 18 2025
.TODAY...
* Sky/Weather...........Mostly sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......85-90...75-82 higher elevations.
24 hr trend......6 degrees up.
* Min Humidity..........26-33 percent.
24 hr trend......6 percent down.
* Wind (20 FT).
Lower Elevations...Southwest winds around 5 mph shifting to
the southeast in the afternoon.
Ridges.............South winds around 5 mph.
* Mixing Height.........500-1500 ft agl increasing to 8000-9500 ft
agl.
* Transport Winds.......Southwest 10 to 15 mph increasing to 20 to
25 mph in the afternoon.
* CWR...................0 percent.
.TONIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers in
the evening.
* Chance Lightning.......0 percent.
* Min Temperature.......58-65.
24 hr trend......3 degrees up.
* Max Humidity..........62-72 percent...54-62 percent higher
elevations.
24 hr trend......12 percent down...45 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...South winds 5 to 10 mph.
Ridges.............South winds 5 to 10 mph.
* Mixing Height.........8500 ft agl decreasing to 500-1500 ft agl.
* Transport Winds.......Southeast 15 to 20 mph.
* CWR...................0 percent.
.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......94-99...85-92 higher elevations.
24 hr trend......8 degrees up.
* Min Humidity..........17-22 percent.
24 hr trend......7 percent down...16 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Southwest winds around 5 mph shifting to
the northwest in the afternoon.
Ridges.............South winds around 5 mph shifting to the
northwest in the afternoon.
* Mixing Height.........500-2000 ft agl increasing to 11000-12500
ft agl.
* Transport Winds.......Southwest 15 to 20 mph.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Mostly clear. Lows in the lower 60s. Highs in the
lower 90s. Northwest winds 10 to 15 mph.
.THURSDAY...Not as warm. Partly cloudy. Chance of showers and
slight chance of thunderstorms. Lows in the upper 50s. Highs
around 80. Northwest winds 15 to 20 mph.
.FRIDAY...Mostly clear. Lows in the mid 50s. Highs in the upper
70s. Northeast winds 10 to 15 mph.
.SATURDAY...Mostly clear. Lows in the lower 50s. Highs in the
lower 80s.
.SUNDAY...Mostly clear. Lows in the mid 50s. Highs in the mid
80s.
$$
MTZ116-118-182300-
Lincoln Ranger District of the Helena National Forest-
Helena and Townsend Ranger Districts of the Helena National
Forest-
259 AM MDT Mon Aug 18 2025
.TODAY...
* Sky/Weather...........Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon.
* Chance Lightning.......20 percent.
* Max Temperature.......80-88...71-80 higher elevations.
24 hr trend......13 degrees up.
* Min Humidity..........24-33 percent.
24 hr trend......10 percent down...17 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Southwest winds 10 to 15 mph.
Ridges.............Southwest winds 10 to 15 mph.
* Mixing Height.........1000-2500 ft agl increasing to 4000 ft agl
late in the morning, then increasing to 8000-9500 ft agl early in
the afternoon increasing to 10000-10500 ft agl decreasing to 8500 ft
agl late in the afternoon.
* Transport Winds.......Southwest 25 to 30 mph.
* CWR...................0 percent.
.TONIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers and
thunderstorms in the evening.
* Chance Lightning.......20 percent.
* Min Temperature.......53-60.
24 hr trend......3 degrees up.
* Max Humidity..........54-64 percent.
24 hr trend......36 percent down...30 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph shifting to
the south after midnight.
Ridges.............South winds 10 to 15 mph.
* Mixing Height.........7000 ft agl decreasing to 1000-1500 ft agl.
* Transport Winds.......South 20 to 25 mph decreasing to 10 to 15
mph after midnight.
* CWR...................0 percent.
.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......88-96...78-88 higher elevations.
24 hr trend......6 degrees up.
* Min Humidity..........12-18 percent.
24 hr trend......13 percent down.
* Wind (20 FT).
Lower Elevations...South winds 10 to 15 mph.
Ridges.............South winds 10 to 15 mph.
* Mixing Height.........1000-1500 ft agl increasing to 11500-13000
ft agl.
* Transport Winds.......Southwest 15 to 20 mph.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Mostly clear. Lows in the upper 50s. Highs in the
mid 80s. West winds 10 to 15 mph.
.THURSDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the upper 70s.
Northwest winds 10 to 15 mph.
.FRIDAY...Mostly clear. Lows in the lower 50s. Highs in the upper
70s. North winds 15 to 20 mph.
.SATURDAY...Mostly clear. Lows in the lower 50s. Highs in the
lower 80s.
.SUNDAY...Partly cloudy. Lows in the mid 50s. Highs in the lower
80s.
$$
MTZ117-182300-
Central and Eastern Lewis and Clark National Forest Areas-
259 AM MDT Mon Aug 18 2025
.TODAY...
* Sky/Weather...........Mostly sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......82-90...72-81 higher elevations.
24 hr trend......5 degrees up.
* Min Humidity..........23-32 percent.
24 hr trend......8 percent down.
* Wind (20 FT).
Lower Elevations...Southwest winds 10 to 15 mph.
Ridges.............Southwest winds 10 to 15 mph.
* Mixing Height.........1000-1500 ft agl increasing to 9500-11000
ft agl.
* Transport Winds.......Southwest 15 to 20 mph increasing to around
25 mph in the afternoon.
* CWR...................0 percent.
.TONIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers and
thunderstorms in the evening.
* Chance Lightning.......20 percent.
* Min Temperature.......54-62.
24 hr trend......2 degrees up...8 degrees up higher elevations.
* Max Humidity..........55-65 percent.
24 hr trend......21 percent down.
* Wind (20 FT).
Lower Elevations...South winds 5 to 10 mph.
Ridges.............South winds 5 to 10 mph.
* Mixing Height.........10000 ft agl decreasing to 1000-1500 ft
agl.
* Transport Winds.......South 15 to 20 mph.
* CWR...................0 percent.
.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......89-97...80-89 higher elevations.
24 hr trend......11 degrees up.
* Min Humidity..........13-18 percent.
24 hr trend......10 percent down.
* Wind (20 FT).
Lower Elevations...Southwest winds 10 to 15 mph.
Ridges.............Southwest winds 10 to 15 mph.
* Mixing Height.........500-1500 ft agl increasing to 11500-13000
ft agl.
* Transport Winds.......Southwest 15 to 20 mph.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Mostly clear. Lows in the upper 50s. Highs in the
mid 80s. West winds 15 to 20 mph.
.THURSDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the upper 70s.
Northwest winds 10 to 15 mph.
.FRIDAY...Mostly clear. Lows in the lower 50s. Highs in the mid
70s. Northeast winds 10 to 15 mph.
.SATURDAY...Mostly clear. Lows around 50. Highs in the upper 70s.
.SUNDAY...Mostly clear. Lows in the lower 50s. Highs in the lower
80s.
$$
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