Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
891
FNUS55 KTFX 192025
FWFTFX
Fire Weather Planning Forecast for North-Central Montana
National Weather Service Great Falls MT
225 PM MDT Tue Aug 19 2025
.DISCUSSION...
After a hot and dry remainder of the day, showers and thunderstorms
look to develop along the Continental Divide this evening, moving
east onto the plains of North-central Montana tonight. Gusty winds
and lightning are the main concern with these thunderstorms.
Wednesday looks to be on the warm and dry side again, though not as
warm or dry as today. Winds do look to be a touch stronger, however.
A round of widely scattered showers and thunderstorms look to
develop Wednesday afternoon, with hail, winds, and lightning all
being a concern.
A cold front then moves through late Wednesday into early Thursday,
which will bring temperatures to near or a bit below average for
this time of the year. The cool down lasts into Friday before the
region trends back closer to average this weekend into early next
week. -AM
MTZ112-201015-
Eastern Glacier/Toole/Central/Eastern Pondera/Liberty-
225 PM MDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather...........Partly cloudy then becoming mostly cloudy.
Slight chance of showers and thunderstorms in the evening, then
chance of showers and thunderstorms after midnight.
* Chance Lightning.......40 percent.
* Min Temperature.......57-62.
24 hr trend......5 degrees up.
* Max Humidity..........57-67 percent.
24 hr trend......Unchanged.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph.
Ridges.............West winds 10 to 15 mph.
* Mixing Height.........9500 ft agl decreasing to 500-1000 ft agl.
* Transport Winds.......West 20 to 25 mph.
* CWR...................10 percent.
.WEDNESDAY...
* Sky/Weather...........Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon.
* Chance Lightning.......20 percent.
* Max Temperature.......82-90...72-80 higher elevations.
24 hr trend......6 degrees down.
* Min Humidity..........21-27 percent.
24 hr trend......3 percent up.
* 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 8500-9500 ft
agl.
* Transport Winds.......West around 25 mph increasing to around 35
mph in the afternoon.
* CWR...................0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather...........Mostly clear. Slight chance of showers and
thunderstorms in the evening.
* Chance Lightning.......0 percent.
* Min Temperature.......47-53.
24 hr trend......9 degrees down.
* Max Humidity..........79-89 percent.
24 hr trend......17 percent up...27 percent up higher
elevations.
* Wind (20 FT).
Lower Elevations...Northwest winds 15 to 20 mph.
Ridges.............Northwest winds 15 to 20 mph.
* Mixing Height.........6500-8000 ft agl decreasing to 500-2000 ft
agl early in the evening.
* Transport Winds.......West around 35 mph becoming northwest
around 25 mph after midnight.
* CWR...................0 percent.
.THURSDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......74-80...67-72 higher elevations.
24 hr trend......7 degrees down.
* Min Humidity..........22-30 percent.
24 hr trend......Unchanged...6 percent down higher elevations.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph.
Ridges.............Northwest winds 10 to 15 mph.
* Mixing Height.........1000-2500 ft agl increasing to 9000-9500 ft
agl.
* Transport Winds.......Northwest 15 to 20 mph.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.FRIDAY...Mostly clear. Lows in the upper 40s. Highs in the lower
70s. North winds 10 to 15 mph.
.SATURDAY...Mostly clear. Lows in the upper 40s. Highs in the mid
70s. East winds 10 to 15 mph.
.SUNDAY...Mostly clear. Lows in the upper 40s. Highs in the upper
70s. East winds 10 to 15 mph.
.MONDAY...Mostly clear. Lows in the lower 50s. Highs in the lower
80s.
.TUESDAY...Mostly clear. Lows in the lower 50s. Highs in the
lower 80s.
$$
MTZ113-201015-
Hill and Blaine Counties-
225 PM MDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather...........Partly cloudy then becoming mostly cloudy.
Chance of showers and thunderstorms after midnight.
* Chance Lightning.......30 percent.
* Min Temperature.......61-66.
24 hr trend......2 degrees up.
* Max Humidity..........64-74 percent.
24 hr trend......2 percent down...8 percent up higher
elevations.
* Wind (20 FT).
Lower Elevations...Northeast winds 5 to 10 mph.
Ridges.............Northeast winds 5 to 10 mph.
* Mixing Height.........8500 ft agl decreasing to 500-1000 ft agl.
* Transport Winds.......East 15 to 20 mph shifting to the northeast
after midnight.
* CWR...................10 percent.
.WEDNESDAY...
* Sky/Weather...........Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon.
* Chance Lightning.......10 percent.
* Max Temperature.......87-92...80-85 higher elevations.
24 hr trend......3 degrees down.
* Min Humidity..........24-31 percent.
24 hr trend......3 percent down...6 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.......North 20 to 25 mph.
* CWR...................0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather...........Mostly cloudy then becoming partly cloudy.
Slight chance of showers and thunderstorms through the night.
* Chance Lightning.......20 percent.
* Min Temperature.......53-59.
24 hr trend......6 degrees down.
* Max Humidity..........76-86 percent.
24 hr trend......14 percent up.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph.
Ridges.............Northwest winds 10 to 15 mph.
* Mixing Height.........6500 ft agl decreasing to 500-1000 ft agl.
* Transport Winds.......Northwest 25 to 30 mph.
* CWR...................10 percent.
.THURSDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......75-80...67-73 higher elevations.
24 hr trend......12 degrees down.
* Min Humidity..........27-34 percent.
24 hr trend......4 percent up.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph.
Ridges.............Northwest winds 10 to 15 mph.
* Mixing Height.........1000-2000 ft agl increasing to 7000-7500 ft
agl.
* Transport Winds.......Northwest 15 to 20 mph.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.FRIDAY...Mostly clear. Lows around 50. Highs in the mid 70s.
North winds 10 to 15 mph.
.SATURDAY...Mostly clear. Lows in the upper 40s. Highs in the mid
70s. East winds 10 to 15 mph.
.SUNDAY...Mostly clear. Lows in the upper 40s. Highs in the upper
70s. East winds 10 to 15 mph.
.MONDAY...Mostly clear. Lows in the lower 50s. Highs in the lower
80s.
.TUESDAY...Mostly clear. Lows in the lower 50s. Highs in the
lower 80s.
$$
MTZ114-201015-
Lewis and Clark National Forest Rocky Mountain District-
Rocky Mountain Front-
225 PM MDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather...........Partly cloudy then becoming mostly cloudy.
Chance of showers and thunderstorms through the night.
* Chance Lightning.......40 percent.
* Min Temperature.......56-61.
24 hr trend......1 degree down...4 degrees up higher elevations.
* Max Humidity..........58-68 percent...49-59 percent higher
elevations.
24 hr trend......10 percent up...5 percent down higher
elevations.
* 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 1000-1500 ft
agl.
* Transport Winds.......Northwest 20 to 25 mph.
* CWR...................10 percent.
.WEDNESDAY...
* Sky/Weather...........Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon.
* Chance Lightning.......20 percent.
* Max Temperature.......83-91...69-79 higher elevations.
24 hr trend......1 degree down.
* Min Humidity..........19-25 percent...25-35 percent higher
elevations.
24 hr trend......6 percent up.
* 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 10500-11500
ft agl.
* Transport Winds.......West 20 to 25 mph increasing to southwest
around 30 mph in the afternoon.
* CWR...................0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers and
thunderstorms in the evening.
* Chance Lightning.......10 percent.
* Min Temperature.......47-53.
24 hr trend......7 degrees down.
* Max Humidity..........67-77 percent.
24 hr trend......5 percent up...12 percent up higher elevations.
* Wind (20 FT).
Lower Elevations...West winds 10 to 20 mph.
Ridges.............West winds 10 to 20 mph.
* Mixing Height.........8500 ft agl decreasing to 1000-2000 ft agl.
* Transport Winds.......West around 30 mph becoming northwest 20 to
25 mph after midnight.
* CWR...................0 percent.
.THURSDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......76-81...64-74 higher elevations.
24 hr trend......11 degrees down.
* Min Humidity..........21-26 percent.
24 hr trend......2 percent up...9 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph shifting to
the northeast in the afternoon.
Ridges.............West winds 10 to 15 mph.
* Mixing Height.........1000-2500 ft agl increasing to 8500-10000
ft agl.
* Transport Winds.......West 15 to 20 mph.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.FRIDAY...Mostly clear. Lows in the upper 40s. Highs in the lower
70s. North winds 15 to 20 mph.
.SATURDAY...Mostly clear. Lows in the upper 40s. Highs in the mid
70s. Northeast winds 10 to 15 mph.
.SUNDAY...Mostly clear. Lows in the upper 40s. Highs in the upper
70s. Northeast winds 10 to 15 mph.
.MONDAY...Mostly clear. Lows in the lower 50s. Highs around 80.
.TUESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs around 80.
$$
MTZ115-201015-
Chouteau and Fergus Counties-
225 PM MDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers and
thunderstorms after midnight.
* Chance Lightning.......10 percent.
* Min Temperature.......59-64.
24 hr trend......2 degrees up.
* Max Humidity..........55-65 percent...41-51 percent higher
elevations.
24 hr trend......10 percent down...25 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...East winds 10 to 15 mph shifting to the
northwest after midnight.
Ridges.............East winds 10 to 15 mph shifting to the
south after midnight.
* Mixing Height.........9000 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...........Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon.
* Chance Lightning.......10 percent.
* Max Temperature.......87-93...79-85 higher elevations.
24 hr trend......6 degrees down.
* Min Humidity..........23-30 percent.
24 hr trend......6 percent up.
* 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 7000-8500 ft
agl.
* Transport Winds.......Northwest 20 to 25 mph.
* CWR...................0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather...........Mostly cloudy then becoming partly cloudy.
Chance of showers and thunderstorms in the evening, then slight
chance of showers and thunderstorms after midnight.
* Chance Lightning.......30 percent.
* Min Temperature.......55-61.
24 hr trend......5 degrees down.
* Max Humidity..........69-79 percent.
24 hr trend......8 percent up...30 percent up higher elevations.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph.
Ridges.............West winds 10 to 15 mph.
* Mixing Height.........7000 ft agl decreasing to 500-1500 ft agl.
* Transport Winds.......Northwest 25 to 30 mph.
* CWR...................10 percent.
.THURSDAY...
* Sky/Weather...........Mostly sunny. Slight chance of showers in
the morning.
* Chance Lightning.......0 percent.
* Max Temperature.......76-81...68-74 higher elevations.
24 hr trend......11 degrees down.
* Min Humidity..........26-35 percent.
24 hr trend......2 percent up...9 percent up higher elevations.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph.
Ridges.............Northwest winds 10 to 15 mph.
* Mixing Height.........1000-2500 ft agl increasing to 7500-8000 ft
agl.
* Transport Winds.......Northwest 15 to 20 mph.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.FRIDAY...Mostly clear. Lows in the lower 50s. Highs in the mid
70s. Northeast winds 10 to 15 mph.
.SATURDAY...Mostly clear. Lows in the lower 50s. Highs in the
upper 70s. East winds 10 to 15 mph.
.SUNDAY...Mostly clear. Lows in the lower 50s. Highs around 80.
East winds 15 to 20 mph.
.MONDAY...Mostly clear. Lows in the lower 50s. Highs in the lower
80s.
.TUESDAY...Mostly clear. Lows in the mid 50s. Highs in the mid
80s.
$$
MTZ116-118-201015-
Lincoln Ranger District of the Helena National Forest-
Helena and Townsend Ranger Districts of the Helena National
Forest-
225 PM MDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers and
thunderstorms.
* Chance Lightning.......10 percent.
* Min Temperature.......53-61.
24 hr trend......2 degrees up.
* Max Humidity..........43-53 percent.
24 hr trend......12 percent down.
* Wind (20 FT).
Lower Elevations...Southeast winds 10 to 20 mph shifting to
the northwest after midnight.
Ridges.............West winds 15 to 20 mph.
* Mixing Height.........13000 ft agl decreasing to 1000-2000 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 and
thunderstorms in the afternoon.
* Chance Lightning.......20 percent.
* Max Temperature.......83-92...74-84 higher elevations.
24 hr trend......6 degrees down.
* Min Humidity..........19-29 percent.
24 hr trend......6 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 4000-5000 ft
agl late in the morning, then increasing to 7000 ft agl early in
the afternoon increasing to 9500 ft agl early in the afternoon
increasing to 10500-11500 ft agl decreasing to 9500 ft agl late
in the afternoon.
* Transport Winds.......West 15 to 20 mph increasing to around 25
mph in the afternoon.
* CWR...................0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers and
thunderstorms in the evening.
* Chance Lightning.......20 percent.
* Min Temperature.......49-57.
24 hr trend......5 degrees down.
* Max Humidity..........61-71 percent.
24 hr trend......19 percent up...13 percent up higher
elevations.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph.
Ridges.............Northwest winds 10 to 15 mph.
* Mixing Height.........7000 ft agl decreasing to 1000-2000 ft agl.
* Transport Winds.......Northwest 20 to 25 mph.
* CWR...................0 percent.
.THURSDAY...
* Sky/Weather...........Sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......76-84...66-76 higher elevations.
24 hr trend......6 degrees down.
* Min Humidity..........19-28 percent.
24 hr trend......3 percent up...2 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph.
Ridges.............Northwest winds 10 to 15 mph.
* Mixing Height.........1000-2500 ft agl increasing to 8500-10000
ft agl.
* Transport Winds.......Northwest 15 to 20 mph.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.FRIDAY...Mostly clear. Lows around 50. Highs in the mid 70s.
North winds 15 to 20 mph.
.SATURDAY...Mostly clear. Lows in the upper 40s. Highs in the
upper 70s. Northeast winds 15 to 20 mph.
.SUNDAY...Mostly clear. Lows around 50. Highs around 80.
Northeast winds 10 to 15 mph.
.MONDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 80s.
.TUESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs around 80.
$$
MTZ117-201015-
Central and Eastern Lewis and Clark National Forest Areas-
225 PM MDT Tue Aug 19 2025
.TONIGHT...
* Sky/Weather...........Partly cloudy. Slight chance of showers and
thunderstorms.
* Chance Lightning.......10 percent.
* Min Temperature.......55-62.
24 hr trend......1 degree down.
* Max Humidity..........50-60 percent...33-43 percent higher
elevations.
24 hr trend......7 percent down...20 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...East winds 10 to 15 mph shifting to the
west after midnight.
Ridges.............South winds 10 to 15 mph.
* Mixing Height.........11500 ft agl decreasing to 1000-1500 ft
agl.
* Transport Winds.......Southeast 20 to 25 mph shifting to the
southwest after midnight.
* CWR...................0 percent.
.WEDNESDAY...
* Sky/Weather...........Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon.
* Chance Lightning.......20 percent.
* Max Temperature.......85-93...76-85 higher elevations.
24 hr trend......4 degrees down.
* Min Humidity..........18-27 percent.
24 hr trend......6 percent up.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph.
Ridges.............West winds 10 to 15 mph.
* Mixing Height.........1000-2500 ft agl increasing to 10500-11500
ft agl.
* Transport Winds.......West 20 to 25 mph.
* CWR...................0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather...........Mostly cloudy then becoming partly cloudy.
Slight chance of showers and thunderstorms through the night.
* Chance Lightning.......20 percent.
* Min Temperature.......50-56.
24 hr trend......3 degrees down...8 degrees down higher
elevations.
* Max Humidity..........66-76 percent.
24 hr trend......13 percent up...29 percent up higher
elevations.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph.
Ridges.............Northwest winds 10 to 15 mph.
* Mixing Height.........7000 ft agl decreasing to 1000-1500 ft agl.
* Transport Winds.......Northwest around 25 mph.
* CWR...................10 percent.
.THURSDAY...
* Sky/Weather...........Mostly sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......76-82...66-75 higher elevations.
24 hr trend......9 degrees down.
* Min Humidity..........24-34 percent.
24 hr trend......4 percent up.
* Wind (20 FT).
Lower Elevations...Northwest winds 10 to 15 mph.
Ridges.............Northwest winds 10 to 15 mph.
* Mixing Height.........1000-2500 ft agl increasing to 8500-9500 ft
agl.
* Transport Winds.......Northwest 15 to 20 mph.
* CWR...................0 percent.
.FORECAST DAYS 3 THROUGH 7......
.FRIDAY...Mostly clear. Lows in the upper 40s. Highs in the lower
70s. Northeast winds 15 to 20 mph.
.SATURDAY...Mostly clear. Lows in the upper 40s. Highs in the mid
70s. East winds 15 to 20 mph.
.SUNDAY...Mostly clear. Lows in the upper 40s. Highs in the upper
70s. East winds 15 to 20 mph.
.MONDAY...Mostly clear. Lows in the lower 50s. Highs in the upper
70s.
.TUESDAY...Mostly clear. Lows in the lower 50s. Highs around 80.
$$
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