FNUS55 KTFX 200710 FWFTFX Fire Weather Planning Forecast for North-Central Montana National Weather Service Great Falls MT 110 AM MDT Wed May 20 2026 .DISCUSSION... A cold front will bring a northerly wind shift and a round of scattered to numerous showers and embedded thunderstorms to the northern and central zones today before continuing southward and transitioning to stratiform rain and mountain snow tonight into Thursday morning. Much warmer and drier conditions move in for most if not all of the holiday weekend with breezy conditions developing by Sunday. An approaching cold front looks to bring increased shower and thunderstorm activity and more breeziness later on Monday or even Tuesday followed by a period of cooler temperatures, mountain snow, and lower elevation rain showers. -RCG MTZ112-202215- Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- 110 AM MDT Wed May 20 2026 .TODAY... * Sky/Weather...........Partly sunny. Chance of showers through the day. Slight chance of thunderstorms in the afternoon. * Chance Lightning.......20 percent. * Max Temperature.......50-57...42-49 higher elevations. 24 hr trend......8 degrees down. * Min Humidity..........50-60 percent...66-76 percent higher elevations. 24 hr trend......13 percent up...21 percent up higher elevations. * Wind (20 FT). Lower Elevations...Northwest winds 15 to 20 mph. Ridges.............Northwest winds 15 to 20 mph. * Mixing Height.........1000-2000 ft agl increasing to 6000-6500 ft agl. * Transport Winds.......Northwest 20 to 25 mph. * CWR...................10 percent. .TONIGHT... * Sky/Weather...........Mostly cloudy. Chance of showers in the evening. Slight chance of rain after midnight. * Chance Lightning.......0 percent. * Min Temperature.......31-36. 24 hr trend......5 degrees down. * Max Humidity..........80-90 percent. 24 hr trend......10 percent up...15 percent down higher elevations. * Wind (20 FT). Lower Elevations...Northwest winds 15 to 20 mph. Ridges.............Northwest winds 15 to 20 mph. * Mixing Height.........4500-6000 ft agl decreasing to 1000-1500 ft agl. * Transport Winds.......Northwest 20 to 25 mph. * CWR...................10 percent. .THURSDAY... * Sky/Weather...........Partly sunny. * Chance Lightning.......0 percent. * Max Temperature.......59-64...52-58 higher elevations. 24 hr trend......7 degrees up...12 degrees up higher elevations. * Min Humidity..........30-39 percent. 24 hr trend......18 percent down...34 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 ft agl increasing to 7500-8000 ft agl. * Transport Winds.......Northwest 20 to 25 mph. * CWR...................0 percent. .FORECAST DAYS 3 THROUGH 7...... .FRIDAY...Partly cloudy. Lows in the upper 30s. Highs in the upper 60s. Southwest winds 15 to 20 mph. .SATURDAY...Partly cloudy. Lows in the lower 40s. Highs in the mid 70s. Southwest winds 15 to 20 mph. .SUNDAY...Windy. Partly cloudy. Lows in the upper 40s. Highs in the upper 70s. West winds around 25 mph. .MEMORIAL DAY...Partly cloudy. Lows in the upper 40s. Highs in the upper 70s. .TUESDAY...Cooler. Mostly cloudy. Chance of rain. Lows in the mid 40s. Highs in the upper 60s. $$ MTZ113-202215- Hill and Blaine Counties- 110 AM MDT Wed May 20 2026 .TODAY... * Sky/Weather...........Partly sunny. Chance of showers through the day. Slight chance of thunderstorms in the afternoon. * Chance Lightning.......20 percent. * Max Temperature.......57-62...48-53 higher elevations. 24 hr trend......7 degrees down. * Min Humidity..........44-51 percent...55-64 percent higher elevations. 24 hr trend......14 percent up...21 percent up higher elevations. * Wind (20 FT). Lower Elevations...Northwest winds 15 to 20 mph. Ridges.............Northwest winds 15 to 20 mph. * Mixing Height.........500-2000 ft agl increasing to 7000 ft agl. * Transport Winds.......Northwest 20 to 25 mph. * CWR...................10 percent. .TONIGHT... * Sky/Weather...........Mostly cloudy. * Chance Lightning.......0 percent. * Min Temperature.......34-39. 24 hr trend......4 degrees down. * Max Humidity..........87-97 percent. 24 hr trend......22 percent up. * Wind (20 FT). Lower Elevations...Northwest winds 10 to 15 mph. Ridges.............Northwest winds 10 to 15 mph. * Mixing Height.........5500-6500 ft agl decreasing to 500-1000 ft agl. * Transport Winds.......Northwest 20 to 25 mph. * CWR...................0 percent. .THURSDAY... * Sky/Weather...........Partly sunny. Slight chance of showers in the afternoon. * Chance Lightning.......0 percent. * Max Temperature.......60-65...51-56 higher elevations. 24 hr trend......4 degrees up. * Min Humidity..........37-43 percent. 24 hr trend......8 percent down. * 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 5500-6500 ft agl. * Transport Winds.......Northwest 20 to 25 mph. * CWR...................0 percent. .FORECAST DAYS 3 THROUGH 7...... .FRIDAY...Mostly clear. Lows in the upper 30s. Highs around 70. West winds 10 to 15 mph. .SATURDAY...Partly cloudy. Lows in the mid 40s. Highs in the upper 70s. Southwest winds 10 to 15 mph. .SUNDAY...Partly cloudy. Lows in the upper 40s. Highs in the lower 80s. Southwest winds 15 to 20 mph. .MEMORIAL DAY...Partly cloudy. Lows in the lower 50s. Highs in the mid 80s. .TUESDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the lower 50s. Highs in the upper 70s. $$ MTZ114-202215- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front- 110 AM MDT Wed May 20 2026 .TODAY... * Sky/Weather...........Mostly cloudy. Chance of showers in the morning, then showers with possible thunderstorms and snow showers in the afternoon. * Chance Lightning.......50 percent. * Max Temperature.......50-56...39-49 higher elevations. 24 hr trend......10 degrees down. * Min Humidity..........59-69 percent...76-86 percent higher elevations. 24 hr trend......30 percent up. * Wind (20 FT). Lower Elevations...West winds 10 to 15 mph shifting to the north in the afternoon. Ridges.............West winds 10 to 15 mph. * Mixing Height.........500-2000 ft agl increasing to 3500-5000 ft agl in the late morning and afternoon. * Transport Winds.......Northwest 20 to 25 mph. * CWR...................30 percent. .TONIGHT... * Sky/Weather...........Mostly cloudy. Chance of rain and snow showers in the evening. * Chance Lightning.......0 percent. * Min Temperature.......32-37...26-32 higher elevations. 24 hr trend......6 degrees down. * Max Humidity..........83-93 percent. 24 hr trend......16 percent up...unchanged higher elevations. * Wind (20 FT). Lower Elevations...Northwest winds 10 to 15 mph. Ridges.............Northwest winds 10 to 15 mph. * Mixing Height.........1500-3000 ft agl decreasing to 500-1000 ft agl in the late evening and overnight. * Transport Winds.......North 15 to 20 mph. * CWR...................10 percent. .THURSDAY... * Sky/Weather...........Partly sunny. * Chance Lightning.......0 percent. * Max Temperature.......57-62...44-54 higher elevations. 24 hr trend......7 degrees up. * Min Humidity..........34-40 percent...46-56 percent higher elevations. 24 hr trend......27 percent down...43 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 6500-8000 ft agl. * Transport Winds.......North 20 to 25 mph. * CWR...................0 percent. .FORECAST DAYS 3 THROUGH 7...... .FRIDAY...Partly cloudy. Slight chance of showers. Lows in the mid 30s. Highs in the mid 60s. West winds 10 to 15 mph. .SATURDAY...Partly cloudy. Lows in the lower 40s. Highs in the lower 70s. West winds 15 to 20 mph. .SUNDAY...Windy. Partly cloudy. Lows in the mid 40s. Highs in the mid 70s. Southwest winds around 25 mph. .MEMORIAL DAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the mid 70s. .TUESDAY...Cooler. Mostly cloudy. Rain likely and slight chance of thunderstorms. Lows in the mid 40s. Highs in the lower 60s. $$ MTZ115-202215- Chouteau and Fergus Counties- 110 AM MDT Wed May 20 2026 .TODAY... * Sky/Weather...........Partly sunny. Slight chance of showers in the morning, then chance of showers and thunderstorms in the afternoon. * Chance Lightning.......50 percent. * Max Temperature.......55-62...48-55 higher elevations. 24 hr trend......8 degrees down...3 degrees down higher elevations. * Min Humidity..........49-59 percent. 24 hr trend......17 percent up. * Wind (20 FT). Lower Elevations...Northwest winds 15 to 20 mph. Ridges.............Northwest winds 15 to 20 mph. * Mixing Height.........500-2000 ft agl increasing to 5000-6000 ft agl. * Transport Winds.......Northwest 20 to 25 mph. * CWR...................10 percent. .TONIGHT... * Sky/Weather...........Mostly cloudy. Slight chance of showers in the evening. * Chance Lightning.......0 percent. * Min Temperature.......34-40. 24 hr trend......4 degrees down. * Max Humidity..........81-91 percent. 24 hr trend......22 percent up. * Wind (20 FT). Lower Elevations...West winds 10 to 15 mph. Ridges.............Northwest winds 10 to 15 mph. * Mixing Height.........4000-5000 ft agl decreasing to 500-1000 ft agl. * Transport Winds.......Northwest 15 to 20 mph. * CWR...................0 percent. .THURSDAY... * Sky/Weather...........Partly sunny. Slight chance of showers in the afternoon. * Chance Lightning.......0 percent. * Max Temperature.......56-63...47-53 higher elevations. 24 hr trend......5 degrees up...2 degrees down higher elevations. * Min Humidity..........37-47 percent...48-55 percent higher elevations. 24 hr trend......14 percent down...1 percent down higher elevations. * Wind (20 FT). Lower Elevations...Northwest winds 10 to 15 mph. Ridges.............Northwest winds 10 to 15 mph. * Mixing Height.........1000-2000 ft agl increasing to 6500-7500 ft agl. * Transport Winds.......Northwest 20 to 25 mph. * CWR...................0 percent. .FORECAST DAYS 3 THROUGH 7...... .FRIDAY...Mostly clear. Lows in the upper 30s. Highs in the upper 60s. West winds 10 to 15 mph. .SATURDAY...Partly cloudy. Lows in the mid 40s. Highs in the mid 70s. Southwest winds 10 to 15 mph. .SUNDAY...Partly cloudy. Lows in the upper 40s. Highs in the lower 80s. Southwest winds 15 to 20 mph. .MEMORIAL DAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the lower 50s. Highs in the lower 80s. .TUESDAY...Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows in the lower 50s. Highs in the mid 70s. $$ MTZ116-118-202215- Lincoln Ranger District of the Helena National Forest- Helena and Townsend Ranger Districts of the Helena National Forest- 110 AM MDT Wed May 20 2026 .TODAY... * Sky/Weather...........Partly sunny. Chance of showers and thunderstorms in the afternoon. * Chance Lightning.......50 percent. * Max Temperature.......53-62...43-53 higher elevations. 24 hr trend......1 degree down. * Min Humidity..........43-53 percent...52-62 percent higher elevations. 24 hr trend......14 percent up. * Wind (20 FT). Lower Elevations...West winds 15 to 20 mph. Ridges.............West winds 15 to 20 mph. * Mixing Height.........500-2000 ft agl increasing to 3500-5000 ft agl late in the morning, then increasing to 6000-7000 ft agl late in the morning decreasing to 5000 ft agl late in the afternoon. * Transport Winds.......West 20 to 25 mph. * CWR...................10 percent. .TONIGHT... * Sky/Weather...........Mostly cloudy. Showers with possible showers and thunderstorms in the evening, then chance of rain and slight chance of snow after midnight. * Chance Lightning.......20 percent. * Min Temperature.......30-37. 24 hr trend......1 degree down. * Max Humidity..........87-97 percent. 24 hr trend......14 percent up...19 percent up higher elevations. * Wind (20 FT). Lower Elevations...North winds 15 to 20 mph. Ridges.............North winds 15 to 20 mph. * Mixing Height.........3000-4000 ft agl decreasing to 1500-2000 ft agl early in the evening. * Transport Winds.......North 20 to 25 mph. * CWR...................30 percent. .THURSDAY... * Sky/Weather...........Partly sunny. * Chance Lightning.......0 percent. * Max Temperature.......52-60...43-52 higher elevations. 24 hr trend......6 degrees down...1 degree up higher elevations. * Min Humidity..........38-48 percent. 24 hr trend......5 percent down...15 percent down higher elevations. * Wind (20 FT). Lower Elevations...North winds 20 to 25 mph decreasing to 10 to 15 mph in the afternoon. Ridges.............North winds 15 to 25 mph. * Mixing Height.........1000-2500 ft agl increasing to 8000 ft agl. * Transport Winds.......North around 30 mph decreasing to 15 to 20 mph in the afternoon. * CWR...................0 percent. .FORECAST DAYS 3 THROUGH 7...... .FRIDAY...Partly cloudy. Lows in the mid 30s. Highs in the lower 60s. Southwest winds 15 to 20 mph. .SATURDAY...Partly cloudy. Lows around 40. Highs in the upper 60s. Southwest winds 15 to 20 mph. .SUNDAY...Partly cloudy. Lows in the mid 40s. Highs in the mid 70s. Southwest winds 20 to 25 mph. .MEMORIAL DAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the mid 70s. .TUESDAY...Cooler. Mostly cloudy. Chance of showers and slight chance of thunderstorms. Lows in the mid 40s. Highs in the mid 60s. $$ MTZ117-202215- Central and Eastern Lewis and Clark National Forest Areas- 110 AM MDT Wed May 20 2026 .TODAY... * Sky/Weather...........Partly sunny. Slight chance of showers in the morning, then showers and chance of thunderstorms in the afternoon. * Chance Lightning.......50 percent. * Max Temperature.......52-57...43-53 higher elevations. 24 hr trend......4 degrees down. * Min Humidity..........54-64 percent. 24 hr trend......21 percent up...15 percent up higher elevations. * Wind (20 FT). Lower Elevations...Northwest winds 15 to 20 mph. Ridges.............Northwest winds 15 to 20 mph. * Mixing Height.........500-1000 ft agl increasing to 2500-4000 ft agl early in the morning, then increasing to 4500-6000 ft agl in the late morning and afternoon decreasing to 4000 ft agl late in the afternoon. * Transport Winds.......West 20 to 25 mph. * CWR...................30 percent. .TONIGHT... * Sky/Weather...........Mostly cloudy. Showers likely and slight chance of snow showers in the evening, then chance of snow and slight chance of rain after midnight. * Chance Lightning.......0 percent. * Min Temperature.......30-36. 24 hr trend......4 degrees down. * Max Humidity..........86-96 percent. 24 hr trend......19 percent up. * Wind (20 FT). Lower Elevations...Northwest winds 15 to 20 mph. Ridges.............Northwest winds 15 to 20 mph. * Mixing Height.........1500-3000 ft agl decreasing to 1000-1500 ft agl after midnight. * Transport Winds.......Northwest 20 to 25 mph. * CWR...................10 percent. .THURSDAY... * Sky/Weather...........Partly sunny. Slight chance of showers in the morning. Chance of showers, snow showers and slight chance of thunderstorms in the afternoon. * Chance Lightning.......20 percent. * Max Temperature.......52-61...42-52 higher elevations. 24 hr trend......3 degrees down. * Min Humidity..........38-48 percent...48-58 percent higher elevations. 24 hr trend......11 percent down...1 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 6000-7500 ft agl. * Transport Winds.......Northwest 20 to 25 mph. * CWR...................10 percent. .FORECAST DAYS 3 THROUGH 7...... .FRIDAY...Partly cloudy. Lows in the mid 30s. Highs in the lower 60s. West winds 10 to 15 mph. .SATURDAY...Partly cloudy. Lows in the lower 40s. Highs around 70. Southwest winds 15 to 20 mph. .SUNDAY...Partly cloudy. Lows in the mid 40s. Highs in the mid 70s. Southwest winds 15 to 20 mph. .MEMORIAL DAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the mid 70s. .TUESDAY...Cooler. Mostly cloudy. Chance of showers and slight chance of thunderstorms. Lows in the upper 40s. Highs in the mid 60s. $$ weather.gov/greatfalls