Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
274
FNUS55 KTFX 181917
FWFTFX
Fire Weather Planning Forecast for North-Central Montana
National Weather Service Great Falls MT
117 PM MDT Mon Aug 18 2025
.DISCUSSION...
Scattered showers and thunderstorms move northeastward from
southwest Montana toward Central Montana this afternoon and evening.
Gusty winds and lightning are the main concern with thunderstorms
today.
Temperatures trend warmer for the Tuesday and Wednesday timeframe,
with afternoon humidity looking lowest Tuesday. Although not likely,
a shower or thunderstorm cannot be ruled out over this timeframe.
A cold front arriving Wednesday night looks to bring cooler
temperatures for Thursday and Friday. There is still some
uncertainty as to the strength of the front as well as the winds
that linger in wake of the front on Thursday during the day. -AM
MTZ112-191015-
Eastern Glacier/Toole/Central/Eastern Pondera/Liberty-
117 PM MDT Mon Aug 18 2025
.TONIGHT...
* Sky/Weather...........Mostly clear.
* Chance Lightning.......0 percent.
* Min Temperature.......53-59.
24 hr trend......7 degrees up.
* Max Humidity..........58-68 percent.
24 hr trend......4 percent down...9 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...South winds 10 to 15 mph shifting to the
southwest after midnight.
Ridges.............South winds 10 to 15 mph.
* Mixing Height.........9500 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.......86-94...77-84 higher elevations.
24 hr trend......7 degrees up.
* Min Humidity..........18-24 percent.
24 hr trend......3 percent down.
* 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 10000-10500
ft agl.
* Transport Winds.......West 15 to 20 mph increasing to southwest
around 25 mph in the afternoon.
* CWR...................0 percent.
.TUESDAY NIGHT...
* Sky/Weather...........Partly cloudy then becoming mostly cloudy.
Slight chance of thunderstorms in the evening. Slight chance of
showers through the night.
* Chance Lightning.......20 percent.
* Min Temperature.......57-62.
24 hr trend......6 degrees up.
* Max Humidity..........55-64 percent.
24 hr trend......7 percent down...2 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...West winds 10 to 15 mph.
Ridges.............Northwest winds 10 to 15 mph.
* Mixing Height.........9500 ft agl decreasing to 500-1500 ft agl.
* Transport Winds.......West 20 to 25 mph.
* CWR...................10 percent.
.WEDNESDAY...
* Sky/Weather...........Mostly sunny. Slight chance of showers in
the afternoon.
* Chance Lightning.......0 percent.
* Max Temperature.......82-91...73-81 higher elevations.
24 hr trend......3 degrees down.
* Min Humidity..........20-27 percent.
24 hr trend......Unchanged.
* Wind (20 FT).
Lower Elevations...West winds 15 to 20 mph.
Ridges.............West winds 15 to 20 mph.
* Mixing Height.........500-1500 ft agl increasing to 10500-12000
ft agl.
* Transport Winds.......West 20 to 25 mph increasing to around 30
mph in the afternoon.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.THURSDAY...Mostly clear. Slight chance of showers. 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 around 80. East
winds 10 to 15 mph.
.SUNDAY...Mostly clear. Lows in the lower 50s. Highs in the lower
80s.
.MONDAY...Mostly clear. Lows in the mid 50s. Highs in the mid
80s.
$$
MTZ113-191015-
Hill and Blaine Counties-
117 PM MDT Mon Aug 18 2025
.TONIGHT...
* Sky/Weather...........Partly cloudy.
* Chance Lightning.......0 percent.
* Min Temperature.......58-64.
24 hr trend......4 degrees up.
* Max Humidity..........61-71 percent.
24 hr trend......14 percent down.
* Wind (20 FT).
Lower Elevations...Southeast winds around 5 mph.
Ridges.............Southeast winds around 5 mph.
* Mixing Height.........7000-8500 ft agl decreasing to 500-1000 ft
agl early in the evening.
* Transport Winds.......Southeast 15 to 20 mph.
* CWR...................0 percent.
.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......91-96...83-88 higher elevations.
24 hr trend......4 degrees up.
* Min Humidity..........21-29 percent.
24 hr trend......3 percent down.
* Wind (20 FT).
Lower Elevations...Southeast winds around 5 mph shifting to
the southwest in the afternoon.
Ridges.............South winds around 5 mph shifting to the
southwest in the afternoon.
* Mixing Height.........500-1500 ft agl increasing to 8500 ft agl.
* Transport Winds.......Southeast 15 to 20 mph shifting to the
southwest in the afternoon.
* CWR...................0 percent.
.TUESDAY NIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of
thunderstorms in the evening. Slight chance of showers through
the night.
* Chance Lightning.......20 percent.
* Min Temperature.......60-65.
24 hr trend......3 degrees up.
* Max Humidity..........64-74 percent...55-64 percent higher
elevations.
24 hr trend......6 percent up...5 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Northeast winds 5 to 10 mph.
Ridges.............Northeast winds 5 to 10 mph.
* Mixing Height.........7500 ft agl decreasing to 500-1000 ft agl.
* Transport Winds.......Northeast 15 to 20 mph.
* CWR...................10 percent.
.WEDNESDAY...
* Sky/Weather...........Mostly sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......88-93...80-85 higher elevations.
24 hr trend......3 degrees down.
* Min Humidity..........25-31 percent.
24 hr trend......3 percent down...5 percent up higher
elevations.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph.
Ridges.............Northwest winds 10 to 15 mph.
* Mixing Height.........500-1500 ft agl increasing to 7500-8000 ft
agl.
* Transport Winds.......Northwest 20 to 25 mph.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.THURSDAY...Not as warm. 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. North winds 10 to 15 mph.
.SATURDAY...Mostly clear. Lows around 50. Highs in the upper 70s.
East winds 10 to 15 mph.
.SUNDAY...Mostly clear. Lows in the lower 50s. Highs in the lower
80s.
.MONDAY...Mostly clear. Lows in the mid 50s. Highs in the mid
80s.
$$
MTZ114-191015-
Lewis and Clark National Forest Rocky Mountain District-
Rocky Mountain Front-
117 PM MDT Mon Aug 18 2025
.TONIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers and
thunderstorms in the evening.
* Chance Lightning.......20 percent.
* Min Temperature.......53-59.
24 hr trend......3 degrees up.
* Max Humidity..........57-67 percent...47-57 percent higher
elevations.
24 hr trend......6 percent down...16 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Southwest winds 5 to 10 mph.
Ridges.............Southwest winds 5 to 10 mph.
* Mixing Height.........10000 ft agl decreasing to 1000-1500 ft
agl.
* Transport Winds.......Southwest 15 to 20 mph.
* CWR...................0 percent.
.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......87-94...74-84 higher elevations.
24 hr trend......6 degrees up.
* Min Humidity..........15-25 percent.
24 hr trend......7 percent down.
* 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 11500-12000
ft agl.
* Transport Winds.......West 15 to 20 mph increasing to southwest
around 25 mph in the afternoon.
* CWR...................0 percent.
.TUESDAY NIGHT...
* Sky/Weather...........Mostly cloudy. Slight chance of showers and
thunderstorms.
* Chance Lightning.......20 percent.
* Min Temperature.......53-60.
24 hr trend......2 degrees up.
* Max Humidity..........53-63 percent.
24 hr trend......2 percent up.
* Wind (20 FT).
Lower Elevations...West winds 10 to 15 mph.
Ridges.............West winds 10 to 15 mph.
* Mixing Height.........11000 ft agl decreasing to 1000-2000 ft
agl.
* Transport Winds.......West 20 to 25 mph.
* CWR...................10 percent.
.WEDNESDAY...
* Sky/Weather...........Mostly sunny. Slight chance of showers in
the afternoon.
* Chance Lightning.......0 percent.
* Max Temperature.......83-91...70-80 higher elevations.
24 hr trend......5 degrees down.
* Min Humidity..........18-23 percent...23-33 percent higher
elevations.
24 hr trend......4 percent up...10 percent up higher elevations.
* Wind (20 FT).
Lower Elevations...West winds 10 to 15 mph.
Ridges.............West winds 10 to 15 mph.
* Mixing Height.........1000-1500 ft agl increasing to 11500-13000
ft agl.
* Transport Winds.......West 20 to 25 mph.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.THURSDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 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 around 80.
Northeast winds 10 to 15 mph.
.SUNDAY...Mostly clear. Lows in the lower 50s. Highs in the lower
80s.
.MONDAY...Mostly clear. Lows in the mid 50s. Highs in the lower
80s.
$$
MTZ115-191015-
Chouteau and Fergus Counties-
117 PM MDT Mon Aug 18 2025
.TONIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers and
thunderstorms in the evening.
* Chance Lightning.......20 percent.
* Min Temperature.......59-64.
24 hr trend......3 degrees up.
* Max Humidity..........59-69 percent.
24 hr trend......13 percent down...45 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Southeast winds 5 to 10 mph.
Ridges.............Southeast winds 5 to 10 mph.
* Mixing Height.........8000 ft agl decreasing to 500-1000 ft agl.
* Transport Winds.......Southeast 15 to 20 mph.
* CWR...................0 percent.
.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......92-97...84-91 higher elevations.
24 hr trend......6 degrees up.
* Min Humidity..........17-22 percent.
24 hr trend......7 percent down...16 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...South winds around 5 mph shifting to the
west in the afternoon.
Ridges.............Southwest winds around 5 mph.
* Mixing Height.........500-1500 ft agl increasing to 10500-11500
ft agl.
* Transport Winds.......Southwest 15 to 20 mph.
* CWR...................0 percent.
.TUESDAY NIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers.
* Chance Lightning.......0 percent.
* Min Temperature.......60-65.
24 hr trend......1 degree up.
* Max Humidity..........53-63 percent...39-49 percent higher
elevations.
24 hr trend......10 percent down.
* Wind (20 FT).
Lower Elevations...East winds 10 to 15 mph shifting to the
southwest after midnight.
Ridges.............Southeast winds 10 to 15 mph.
* Mixing Height.........8500 ft agl decreasing to 500-1000 ft agl.
* Transport Winds.......East 15 to 20 mph shifting to the north
after midnight.
* CWR...................0 percent.
.WEDNESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......88-94...79-86 higher elevations.
24 hr trend......2 degrees down.
* Min Humidity..........22-29 percent.
24 hr trend......3 percent up...10 percent up higher elevations.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph.
Ridges.............Northwest winds 10 to 15 mph.
* Mixing Height.........500-1500 ft agl increasing to 7500-8500 ft
agl.
* Transport Winds.......Northwest 20 to 25 mph.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.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. East winds 15 to 20 mph.
.SUNDAY...Mostly clear. Lows in the mid 50s. Highs in the mid
80s.
.MONDAY...Mostly clear. Slight chance of showers. Lows in the
upper 50s. Highs in the mid 80s.
$$
MTZ116-118-191015-
Lincoln Ranger District of the Helena National Forest-
Helena and Townsend Ranger Districts of the Helena National
Forest-
117 PM MDT Mon Aug 18 2025
.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..........56-66 percent...43-53 percent higher
elevations.
24 hr trend......39 percent down.
* Wind (20 FT).
Lower Elevations...South winds 10 to 15 mph.
Ridges.............South winds 10 to 15 mph.
* Mixing Height.........7500 ft agl decreasing to 1000-1500 ft agl.
* Transport Winds.......East 20 to 25 mph shifting to the southeast
after midnight.
* CWR...................10 percent.
.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......87-95...77-87 higher elevations.
24 hr trend......6 degrees up.
* Min Humidity..........12-19 percent.
24 hr trend......14 percent down.
* 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 14000 ft
agl.
* Transport Winds.......Southwest 15 to 20 mph.
* CWR...................0 percent.
.TUESDAY NIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers in
the evening.
* Chance Lightning.......0 percent.
* Min Temperature.......53-60.
24 hr trend......1 degree up.
* Max Humidity..........41-51 percent.
24 hr trend......1 percent down.
* Wind (20 FT).
Lower Elevations...Northeast winds 10 to 15 mph shifting to
the northwest after midnight.
Ridges.............Northwest winds 10 to 15 mph.
* Mixing Height.........13500 ft agl decreasing to 1000-1500 ft
agl.
* Transport Winds.......South 15 to 20 mph shifting to the
northwest after midnight.
* CWR...................0 percent.
.WEDNESDAY...
* Sky/Weather...........Mostly sunny. Slight chance of showers in
the afternoon.
* Chance Lightning.......0 percent.
* Max Temperature.......84-92...74-84 higher elevations.
24 hr trend......5 degrees down.
* Min Humidity..........18-27 percent.
24 hr trend......8 percent up.
* Wind (20 FT).
Lower Elevations...West winds 10 to 15 mph.
Ridges.............West winds 10 to 15 mph.
* Mixing Height.........1000-2500 ft agl increasing to 10500-12000
ft agl.
* Transport Winds.......West 15 to 20 mph increasing to around 25
mph in the afternoon.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.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. Northeast winds 10 to 15 mph.
.SUNDAY...Partly cloudy. Lows in the lower 50s. Highs in the mid
80s.
.MONDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s.
$$
MTZ117-191015-
Central and Eastern Lewis and Clark National Forest Areas-
117 PM MDT Mon Aug 18 2025
.TONIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers and
thunderstorms in the evening.
* Chance Lightning.......20 percent.
* Min Temperature.......54-61.
24 hr trend......3 degrees up...8 degrees up higher elevations.
* Max Humidity..........56-66 percent...46-56 percent higher
elevations.
24 hr trend......20 percent down.
* Wind (20 FT).
Lower Elevations...South winds 10 to 15 mph.
Ridges.............South winds 10 to 15 mph.
* Mixing Height.........9500 ft agl decreasing to 1000 ft agl.
* Transport Winds.......South 15 to 20 mph.
* CWR...................10 percent.
.TUESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......89-97...79-89 higher elevations.
24 hr trend......9 degrees up.
* Min Humidity..........13-18 percent.
24 hr trend......11 percent down.
* 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 12500 ft
agl.
* Transport Winds.......Southwest 15 to 20 mph.
* CWR...................0 percent.
.TUESDAY NIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers.
* Chance Lightning.......0 percent.
* Min Temperature.......54-61.
24 hr trend......1 degree up.
* Max Humidity..........48-58 percent...31-41 percent higher
elevations.
24 hr trend......20 percent down.
* Wind (20 FT).
Lower Elevations...South winds 10 to 15 mph.
Ridges.............South winds 10 to 15 mph.
* Mixing Height.........11500 ft agl decreasing to 1000-1500 ft
agl.
* Transport Winds.......Southeast 15 to 20 mph shifting to the west
after midnight.
* CWR...................0 percent.
.WEDNESDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......86-92...76-85 higher elevations.
24 hr trend......7 degrees down.
* Min Humidity..........18-26 percent.
24 hr trend......3 percent up.
* Wind (20 FT).
Lower Elevations...West winds 10 to 15 mph.
Ridges.............West winds 10 to 15 mph.
* Mixing Height.........1000-2500 ft agl increasing to 12000-12500
ft agl.
* Transport Winds.......West 15 to 20 mph increasing to around 25
mph in the afternoon.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.THURSDAY...Not as warm. Partly cloudy. Slight chance of showers
and thunderstorms. Lows in the mid 50s. Highs in the mid 70s.
Northwest winds 10 to 15 mph.
.FRIDAY...Mostly clear. Lows around 50. Highs in the mid 70s.
Northeast winds 15 to 20 mph.
.SATURDAY...Mostly clear. Lows around 50. Highs in the upper 70s.
East winds 10 to 15 mph.
.SUNDAY...Mostly clear. Lows in the lower 50s. Highs in the lower
80s.
.MONDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s.
$$
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