Zone Forecast Product
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
628 FPUS55 KTFX 220237 ZFPTFX Zone Forecast Product for Central and Southwest Montana National Weather Service Great Falls MT 836 PM MDT Tue May 21 2024 Spot temperatures and probabilities of measurable precipitation are for the rest of tonight, Wednesday, Wednesday night, and Thursday. ...FLOOD HIGHLIGHTS HAVE BEEN ISSUED FOR PORTIONS OF THE ZONE FORECAST AREA. PLEASE REFER TO THE LATEST FLOOD BULLETIN FOR DETAILS... MTZ301-221000- East Glacier Park Region- Including East Glacier Park, Kiowa, Babb, Saint Mary, Marias Pass, and Logan Pass 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Mostly cloudy. Slight chance of rain and snow early in the evening, then chance of rain and snow after midnight. Lows 35 to 40. Southwest winds 5 to 15 mph. Gusts up to 30 mph early in the evening. Chance of precipitation 50 percent. .WEDNESDAY...Snow likely and chance of rain in the morning, then rain showers, snow showers and slight chance of thunderstorms in the afternoon. Snow accumulation up to 3 inches. Snow level 6500 feet. Highs 40 to 45. West winds up to 10 mph. Chance of precipitation near 100 percent. .WEDNESDAY NIGHT...Colder. Rain showers, snow showers and slight chance of thunderstorms in the evening, then chance of snow and rain after midnight. Snow accumulation of 3 to 6 inches. Snow level 6000 feet. Lows 30 to 35. North winds 10 to 15 mph with gusts to around 30 mph. Chance of precipitation near 100 percent. .THURSDAY...Mostly cloudy. Chance of snow and slight chance of rain in the morning, then rain, snow showers likely and slight chance of thunderstorms in the afternoon. Light snow accumulations. Snow level 5500 feet. Highs 35 to 45. North winds 5 to 15 mph. Chance of precipitation 70 percent. .THURSDAY NIGHT...Mostly cloudy. Chance of rain showers, snow showers and slight chance of thunderstorms in the evening, then chance of rain and snow after midnight. Lows 30 to 35. Southwest winds 5 to 15 mph. Chance of precipitation 50 percent. .FRIDAY...Mostly cloudy with a 50 percent chance of rain and snow. Highs 40 to 50. .FRIDAY NIGHT...Mostly cloudy with a 40 percent chance of rain and snow. Lows 35 to 40. .SATURDAY...Mostly cloudy with a 50 percent chance of rain and snow. Highs 40 to 50. .SATURDAY NIGHT...Mostly cloudy with chance of rain showers, snow and slight chance of thunderstorms. Lows 30 to 35. Chance of precipitation 50 percent. .SUNDAY...Mostly cloudy with a 50 percent chance of rain and snow. Highs 40 to 50. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of rain. Lows 35 to 40. .MEMORIAL DAY AND MONDAY NIGHT...Partly cloudy. Highs 50 to 60. Lows 35 to 40. .TUESDAY...Warmer. Partly cloudy. Highs 60 to 70. $$ MTZ307-221000- Southern Rocky Mountain Front- Including Rogers Pass 836 PM MDT Tue May 21 2024 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM WEDNESDAY TO NOON MDT THURSDAY... .REST OF TONIGHT...Mostly cloudy. Slight chance of rain and snow early in the evening, then chance of rain and snow after midnight. Lows 35 to 40. Southwest winds 5 to 15 mph. Chance of precipitation 50 percent. .WEDNESDAY...Rain and snow likely in the morning, then rain showers, snow showers and slight chance of thunderstorms in the afternoon. Snow accumulation up to 2 inches. Snow level 7000 feet. Highs 40 to 50. West winds up to 10 mph. Chance of precipitation near 100 percent. .WEDNESDAY NIGHT...Colder. Snow showers, rain showers and slight chance of thunderstorms in the evening, then snow showers, rain and slight chance of thunderstorms after midnight. Snow may be heavy at times after midnight. Snow accumulation of 8 to 11 inches. Snow level 6000 feet. Lows around 30. Northwest winds 10 to 20 mph with gusts to around 35 mph. Chance of precipitation near 100 percent. .THURSDAY...Snow in the morning, then snow and rain in the afternoon. Light snow accumulations. Highs 35 to 45. North winds 5 to 15 mph. Gusts up to 35 mph in the morning. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy. Chance of rain and snow in the evening, then chance of snow and slight chance of rain after midnight. Lows 30 to 35. West winds up to 10 mph. Chance of precipitation 50 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy with a 50 percent chance of rain and snow. Highs 45 to 55. Lows 30 to 40. .SATURDAY...Rain showers likely with possible snow and thunderstorms. Highs 45 to 55. Chance of precipitation 70 percent. .SATURDAY NIGHT...Rain showers, snow showers likely and slight chance of thunderstorms. Moderate snow accumulations. Lows 30 to 35. Chance of precipitation 70 percent. .SUNDAY...Mostly cloudy with a 50 percent chance of rain and snow. Highs 45 to 55. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of rain and snow. Lows 30 to 35. .MEMORIAL DAY...Partly cloudy with a 20 percent chance of rain. Highs 50 to 60. .MONDAY NIGHT...Partly cloudy. Lows 35 to 40. .TUESDAY...Warmer, sunny. Highs 65 to 70. $$ MTZ302-221000- Northern High Plains- Including Browning, Heart Butte, and Dupuyer 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Mostly cloudy. A 20 percent chance of rain after midnight. Lows 40 to 45. Southwest winds 5 to 15 mph. .WEDNESDAY...Cooler. Chance of rain in the morning, then rain showers and slight chance of thunderstorms in the afternoon. Highs 45 to 50. Northwest winds 5 to 15 mph. Chance of precipitation near 100 percent. .WEDNESDAY NIGHT...Colder. Rain showers and slight chance of thunderstorms in the evening, then chance of rain after midnight. Lows in the mid 30s. North winds 10 to 20 mph. Chance of precipitation near 100 percent. .THURSDAY...Mostly cloudy. Chance of rain and slight chance of snow in the morning, then chance of rain showers and slight chance of thunderstorms in the afternoon. Highs 45 to 50. North winds 5 to 15 mph. Chance of precipitation 50 percent. .THURSDAY NIGHT...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms in the evening, then slight chance of rain after midnight. Lows around 35. Southwest winds 5 to 10 mph. Chance of precipitation 50 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of rain. Highs 55 to 60. Lows around 40. .SATURDAY...Mostly cloudy with a 50 percent chance of rain. Highs 55 to 60. .SATURDAY NIGHT...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Lows 35 to 40. Chance of precipitation 50 percent. .SUNDAY...Breezy. Mostly cloudy with a 40 percent chance of rain. Highs 55 to 60. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of rain. Lows around 40. .MEMORIAL DAY...Warmer. Partly cloudy. Highs 60 to 70. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows 40 to 45. Highs 70 to 75. $$ MTZ308-221000- Southern High Plains- Including Bynum, Choteau, and Pendroy 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Mostly cloudy. A 20 percent chance of rain after midnight. Lows 40 to 45. Southwest winds up to 10 mph. .WEDNESDAY...Chance of rain in the morning, then rain showers and slight chance of thunderstorms in the afternoon. Highs 50 to 55. Southwest winds up to 10 mph shifting to the northwest in the afternoon. Chance of precipitation near 100 percent. .WEDNESDAY NIGHT...Breezy, colder. Rain showers and chance of thunderstorms in the evening, then rain showers and slight chance of thunderstorms after midnight. Lows in the mid 30s. Northwest winds 10 to 15 mph shifting to the north 15 to 25 mph after midnight. Chance of precipitation near 100 percent. .THURSDAY...Breezy. Rain likely. Highs 45 to 50. North winds 15 to 25 mph decreasing to 10 to 15 mph in the afternoon. Chance of rain 70 percent. .THURSDAY NIGHT...Mostly cloudy. Chance of rain in the evening, then slight chance of rain after midnight. Lows around 35. Southwest winds 5 to 10 mph. Chance of rain 50 percent. .FRIDAY...Not as cool. Mostly cloudy with a 50 percent chance of rain. Highs around 60. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of rain. Lows around 40. .SATURDAY...Rain showers likely and slight chance of thunderstorms. Highs 55 to 60. Chance of precipitation 70 percent. .SATURDAY NIGHT...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Lows around 40. Chance of precipitation 50 percent. .SUNDAY...Mostly cloudy with a 50 percent chance of rain. Highs around 60. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of rain. Lows around 40. .MEMORIAL DAY...Partly cloudy. Highs 65 to 70. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows around 45. Highs 75 to 80. $$ MTZ303-221000- Eastern Glacier, Western Toole, and Central Pondera- Including Cut Bank, Ethridge, and Santa Rita 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Partly cloudy early in the evening then becoming cloudy. A 20 percent chance of rain after midnight. Lows 40 to 45. Southwest winds 5 to 15 mph. .WEDNESDAY...Chance of rain in the morning, then rain showers and slight chance of thunderstorms in the afternoon. Highs 50 to 55. Northwest winds up to 10 mph shifting to the north in the afternoon. Chance of precipitation 90 percent. .WEDNESDAY NIGHT...Colder, cloudy. Rain showers and chance of thunderstorms in the evening, then chance of rain after midnight. Lows in the mid 30s. North winds 10 to 20 mph. Chance of precipitation 90 percent. .THURSDAY...Mostly cloudy with a 50 percent chance of rain. Highs around 50. North winds 10 to 15 mph. .THURSDAY NIGHT...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms in the evening, then slight chance of rain after midnight. Lows around 35. South winds 5 to 10 mph shifting to the southwest after midnight. Chance of precipitation 40 percent. .FRIDAY...Mostly cloudy with a 40 percent chance of rain. Highs around 60. .FRIDAY NIGHT...Mostly cloudy. Lows 35 to 40. .SATURDAY...Mostly cloudy with a 50 percent chance of rain. Highs 55 to 60. .SATURDAY NIGHT...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Lows around 40. Chance of precipitation 50 percent. .SUNDAY...Mostly cloudy with a 40 percent chance of rain. Highs 60 to 65. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows around 40. Highs 65 to 70. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows 40 to 45. Highs around 75. && TEMPERATURE / PRECIPITATION Cut Bank 42 53 34 51 / 20 90 80 40 $$ MTZ304-221000- Eastern Toole and Liberty- Including Devon, Shelby, Chester, Galata, Joplin, Lothair, and Whitlash 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Mostly cloudy with a 20 percent chance of rain. Lows 40 to 45. South winds up to 10 mph. .WEDNESDAY...Rain likely in the morning, then rain showers and slight chance of thunderstorms in the afternoon. Highs 50 to 55. East winds up to 10 mph. Chance of precipitation 90 percent. .WEDNESDAY NIGHT...Colder, cloudy. Rain showers likely and slight chance of thunderstorms in the evening, then chance of rain after midnight. Lows in the mid 30s. Northeast winds 10 to 15 mph. Chance of precipitation 70 percent. .THURSDAY...Mostly cloudy with a 50 percent chance of rain. Highs 50 to 55. North winds 5 to 15 mph. .THURSDAY NIGHT...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms in the evening, then slight chance of rain after midnight. Lows 35 to 40. Northeast winds up to 10 mph shifting to the south after midnight. Chance of precipitation 40 percent. .FRIDAY...Warmer. Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 60 to 65. Chance of precipitation 50 percent. .FRIDAY NIGHT...Mostly cloudy. Lows around 40. .SATURDAY AND SATURDAY NIGHT...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 60 to 65. Lows around 40. Chance of precipitation 50 percent. .SUNDAY...Mostly cloudy with a 50 percent chance of rain. Highs 60 to 65. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of rain. Lows around 40. .MEMORIAL DAY AND MONDAY NIGHT...Mostly clear. Highs 65 to 70. Lows around 45. .TUESDAY...Warmer, sunny. Highs 75 to 80. $$ MTZ305-221000- Hill County- Including Havre 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Mostly cloudy. A 20 percent chance of thunderstorms early in the evening. Patchy fog after midnight. Lows 40 to 45. Southeast winds up to 10 mph. .WEDNESDAY...Patchy fog in the morning. Chance of rain in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. Highs in the mid 50s. East winds up to 10 mph. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Colder, cloudy. Rain showers likely and slight chance of thunderstorms in the evening, then chance of rain after midnight. Lows in the mid 30s. Northeast winds 10 to 15 mph. Chance of precipitation 70 percent. .THURSDAY...Mostly cloudy with a 50 percent chance of rain. Highs 50 to 55. Northeast winds 5 to 15 mph. .THURSDAY NIGHT...Mostly cloudy. Chance of rain in the evening, then slight chance of rain after midnight. Lows 35 to 40. Northeast winds up to 10 mph shifting to the south after midnight. Chance of rain 30 percent. .FRIDAY...Warmer. Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 60 to 65. Chance of precipitation 50 percent. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows around 40. .SATURDAY AND SATURDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Highs around 65. Lows around 40. .SUNDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs around 65. Chance of precipitation 50 percent. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 40 to 45. .MEMORIAL DAY...Sunny with a 20 percent chance of rain. Highs around 70. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows around 45. Highs 75 to 80. && TEMPERATURE / PRECIPITATION Havre 40 57 37 53 / 20 70 70 40 $$ MTZ306-221000- Northern Blaine County- Including Chinook, Zurich, Harlem, Hogeland, and Fort Belknap 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Colder. Mostly cloudy. Slight chance of thunderstorms early in the evening, then slight chance of rain after midnight. Patchy fog after midnight. Lows 35 to 40. Southwest winds up to 10 mph shifting to the east after midnight. Chance of precipitation 20 percent. .WEDNESDAY...Cloudy. Patchy fog in the morning. Chance of rain in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. Highs 55 to 60. East winds 5 to 15 mph. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Cloudy. Rain showers likely and slight chance of thunderstorms in the evening, then chance of rain after midnight. Lows in the mid 30s. Northeast winds 10 to 15 mph. Chance of precipitation 70 percent. .THURSDAY...Mostly cloudy with a 50 percent chance of rain. Highs around 50. Northeast winds 10 to 15 mph. .THURSDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. A 20 percent chance of rain. Lows around 35. Northeast winds 5 to 10 mph shifting to the southeast after midnight. .FRIDAY...Warmer. Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 60 to 65. Chance of precipitation 50 percent. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows around 40. .SATURDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs around 65. Chance of precipitation 40 percent. .SATURDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows 40 to 45. .SUNDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 60 to 65. Chance of precipitation 50 percent. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 40 to 45. .MEMORIAL DAY...Partly cloudy with a 20 percent chance of rain. Highs around 70. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows around 45. Highs 75 to 80. $$ MTZ309-221000- Eastern Pondera and Eastern Teton- Including Brady, Conrad, and Ledger 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Partly cloudy early in the evening then becoming cloudy. A 20 percent chance of rain after midnight. Lows 40 to 45. Southwest winds up to 10 mph. .WEDNESDAY...Cooler, cloudy. Chance of rain in the morning, then rain showers and slight chance of thunderstorms in the afternoon. Highs in the mid 50s. Southwest winds up to 10 mph shifting to the north in the afternoon. Chance of precipitation 90 percent. .WEDNESDAY NIGHT...Colder. Rain showers and chance of thunderstorms in the evening, then rain after midnight. Lows in the mid 30s. North winds 10 to 20 mph. Chance of precipitation near 100 percent. .THURSDAY...Mostly cloudy. Rain likely in the morning, then chance of rain in the afternoon. Highs around 50. North winds 5 to 15 mph. Chance of rain 70 percent. .THURSDAY NIGHT...Mostly cloudy. Chance of rain in the evening, then slight chance of rain after midnight. Lows around 35. East winds up to 5 mph shifting to the southwest after midnight. Chance of rain 40 percent. .FRIDAY...Warmer. Mostly cloudy with a 30 percent chance of rain. Highs 60 to 65. .FRIDAY NIGHT...Mostly cloudy. Lows around 40. .SATURDAY AND SATURDAY NIGHT...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs around 60. Lows around 40. Chance of precipitation 50 percent. .SUNDAY...Mostly cloudy with a 40 percent chance of rain. Highs 60 to 65. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of rain. Lows around 40. .MEMORIAL DAY...Partly cloudy. Highs around 70. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows 40 to 45. Highs 75 to 80. $$ MTZ310-221000- Western and Central Chouteau County- Including Floweree, Carter, and Fort Benton 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Mostly cloudy with a 20 percent chance of rain. Lows in the mid 40s. South winds up to 10 mph. .WEDNESDAY...Cloudy. Chance of rain in the morning, then rain showers and slight chance of thunderstorms in the afternoon. Highs 55 to 60. South winds up to 10 mph shifting to the west in the afternoon. Chance of precipitation 80 percent. .WEDNESDAY NIGHT...Colder. Rain showers and slight chance of thunderstorms. Lows 35 to 40. Northeast winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Rain likely. Light snow accumulations. Highs around 50. North winds 5 to 15 mph. Chance of rain 70 percent. .THURSDAY NIGHT...Mostly cloudy. Chance of rain in the evening, then slight chance of rain after midnight. Lows around 35. Northwest winds up to 10 mph shifting to the south after midnight. Chance of rain 30 percent. .FRIDAY...Warmer. Mostly cloudy with a 50 percent chance of rain. Highs 60 to 65. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of rain. Lows 40 to 45. .SATURDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs around 65. Chance of precipitation 50 percent. .SATURDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows 40 to 45. .SUNDAY...Mostly cloudy with a 50 percent chance of rain. Highs 60 to 65. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 40 to 45. .MEMORIAL DAY...Partly cloudy with a 20 percent chance of rain. Highs around 70. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows around 45. Highs 75 to 80. $$ MTZ311-221000- Bears Paw Mountains and Southern Blaine- Including Rocky Boy 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Partly cloudy early in the evening then becoming mostly cloudy. A 20 percent chance of thunderstorms early in the evening. Lows around 40. South winds up to 10 mph. .WEDNESDAY...Cloudy. Chance of rain in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. Highs 55 to 60. Southwest winds up to 10 mph shifting to the southeast in the afternoon. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Rain showers and slight chance of thunderstorms. Lows 35 to 40. Northeast winds 5 to 15 mph. Chance of precipitation 90 percent. .THURSDAY...Rain likely. Highs 45 to 50. Northeast winds 10 to 15 mph. Chance of rain 70 percent. .THURSDAY NIGHT...Mostly cloudy with chance of rain in the evening, then partly cloudy with slight chance of rain after midnight. Lows around 35. North winds up to 10 mph shifting to the south after midnight. Chance of rain 30 percent. .FRIDAY...Warmer. Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 60 to 65. Chance of precipitation 50 percent. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows 40 to 45. .SATURDAY AND SATURDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Highs 60 to 65. Lows 40 to 45. .SUNDAY...Rain showers likely and slight chance of thunderstorms. Highs 60 to 65. Chance of precipitation 60 percent. .SUNDAY NIGHT...Partly cloudy with chance of rain showers and slight chance of thunderstorms. Lows 40 to 45. Chance of precipitation 30 percent. .MEMORIAL DAY...Partly cloudy with a 20 percent chance of rain. Highs 65 to 70. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows 45 to 50. Highs 75 to 80. $$ MTZ312-221000- Cascade County below 5000ft- Including Great Falls 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Partly cloudy early in the evening then becoming cloudy. A 20 percent chance of rain after midnight. Lows in the mid 40s. Southwest winds 5 to 10 mph. .WEDNESDAY...Cloudy. Chance of rain in the morning, then rain showers and slight chance of thunderstorms in the afternoon. Highs 55 to 60. Southwest winds 5 to 10 mph shifting to the west in the afternoon. Chance of precipitation 90 percent. .WEDNESDAY NIGHT...Colder. Rain showers and chance of thunderstorms in the evening, then rain showers and slight chance of thunderstorms after midnight. Lows 35 to 40. North winds 10 to 20 mph. Chance of precipitation near 100 percent. .THURSDAY...Breezy. Rain and slight chance of snow in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. Light snow accumulations. Highs 45 to 50. North winds 15 to 25 mph decreasing to 10 to 15 mph in the afternoon. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy. Chance of rain in the evening, then slight chance of rain after midnight. Lows around 35. Southwest winds 5 to 10 mph. Chance of rain 40 percent. .FRIDAY...Warmer. Mostly cloudy with a 50 percent chance of rain. Highs 60 to 65. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of rain. Lows around 40. .SATURDAY...Rain showers likely and chance of thunderstorms. Highs 60 to 65. Chance of precipitation 70 percent. .SATURDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms and rain. Lows around 40. .SUNDAY...Mostly cloudy with a 50 percent chance of rain. Highs 60 to 65. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows around 40. .MEMORIAL DAY...Partly cloudy. Highs around 70. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows around 45. Highs 75 to 80. && TEMPERATURE / PRECIPITATION Great Falls Arpt 45 57 37 48 / 20 80 100 80 $$ MTZ313-221000- Judith Basin County and Judith Gap- Including Raynesford, Geyser, Stanford, Windham, Benchland, Hobson, and Moccasin 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Partly cloudy early in the evening then becoming mostly cloudy. A 20 percent chance of thunderstorms early in the evening. Lows around 40. Southwest winds 5 to 10 mph. .WEDNESDAY...Cloudy. Chance of rain in the morning, then rain showers and chance of thunderstorms in the afternoon. Highs in the mid 50s. South winds 5 to 10 mph shifting to the west in the afternoon. Chance of precipitation 90 percent. .WEDNESDAY NIGHT...Colder. Rain showers and chance of thunderstorms in the evening, then rain showers and slight chance of thunderstorms after midnight. Lows 30 to 35. North winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Cooler. Rain and slight chance of snow in the morning, then rain showers, snow showers and slight chance of thunderstorms in the afternoon. Light snow accumulations. Highs 40 to 45. North winds 10 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy with chance of rain showers and slight chance of thunderstorms in the evening, then partly cloudy with slight chance of rain after midnight. Lows around 30. Northwest winds 5 to 10 mph shifting to the southwest after midnight. Chance of precipitation 40 percent. .FRIDAY...Not as cool. Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs around 60. Chance of precipitation 50 percent. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows 35 to 40. .SATURDAY AND SATURDAY NIGHT...Rain showers likely and chance of thunderstorms. Highs around 60. Lows 35 to 40. Chance of precipitation 70 percent. .SUNDAY...Rain showers likely and slight chance of thunderstorms. Highs 55 to 60. Chance of precipitation 60 percent. .SUNDAY NIGHT...Partly cloudy with chance of rain showers and slight chance of thunderstorms. Lows 35 to 40. Chance of precipitation 30 percent. .MEMORIAL DAY...Partly cloudy with a 20 percent chance of thunderstorms. Highs around 65. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows 40 to 45. Highs around 75. $$ MTZ314-221000- Fergus County below 4500ft- Including Hilger and Lewistown 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Partly cloudy with a 20 percent chance of thunderstorms early in the evening, then mostly cloudy after midnight. Lows around 40. Southwest winds up to 10 mph. .WEDNESDAY...Cloudy. Slight chance of rain in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. Highs 55 to 60. Southwest winds up to 10 mph. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Rain showers and chance of thunderstorms in the evening, then rain showers and slight chance of thunderstorms after midnight. Lows 35 to 40. Northeast winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Rain in the morning, then rain showers, slight chance of thunderstorms and snow in the afternoon. Highs 45 to 50. North winds 10 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy with a 30 percent chance of rain in the evening, then partly cloudy after midnight. Lows 30 to 35. Northwest winds 5 to 10 mph shifting to the southwest after midnight. .FRIDAY...Warmer. Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 60 to 65. Chance of precipitation 40 percent. .FRIDAY NIGHT...Mostly cloudy. Lows 40 to 45. .SATURDAY AND SATURDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Highs 60 to 65. Lows 40 to 45. .SUNDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs around 60. Chance of precipitation 50 percent. .SUNDAY NIGHT...Partly cloudy with chance of rain showers and slight chance of thunderstorms. Lows 40 to 45. Chance of precipitation 30 percent. .MEMORIAL DAY...Partly cloudy with a 20 percent chance of rain. Highs 65 to 70. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows 45 to 50. Highs 75 to 80. && TEMPERATURE / PRECIPITATION Lewistown 37 56 34 43 / 20 70 90 90 $$ MTZ315-221000- Upper Blackfoot and MacDonald Pass- Including Marysville, Lincoln, Flesher Pass, and MacDonald Pass 836 PM MDT Tue May 21 2024 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM WEDNESDAY TO NOON MDT THURSDAY... .REST OF TONIGHT...Mostly cloudy. Slight chance of rain early in the evening, then chance of snow and slight chance of rain after midnight. Lows 35 to 45. Southwest winds up to 10 mph. Chance of precipitation 40 percent. .WEDNESDAY...Cloudy. Chance of rain and snow in the morning, then rain showers likely and chance of thunderstorms in the afternoon. Snow accumulation up to 1 inch. Highs 45 to 55. West winds up to 10 mph. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Colder. Snow showers, rain showers and chance of thunderstorms in the evening, then snow showers and slight chance of thunderstorms after midnight. Snow may be heavy at times after midnight. Snow accumulation of 8 to 11 inches. Snow level 5000 feet. Lows 30 to 35. Northwest winds 5 to 15 mph. Gusts up to 35 mph after midnight. Chance of precipitation near 100 percent. .THURSDAY...Snow and rain in the morning, then rain, snow showers and slight chance of thunderstorms in the afternoon. Moderate snow accumulations. Snow level 5500 feet. Highs 35 to 45. Northwest winds 5 to 15 mph. Gusts up to 35 mph in the morning. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy. A 40 percent chance of rain in the evening. Lows 30 to 35. West winds up to 10 mph. .FRIDAY...Not as cool. Mostly cloudy with a 40 percent chance of rain. Highs 50 to 55. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of rain. Lows 35 to 40. .SATURDAY...Rain showers likely and chance of thunderstorms. Highs 50 to 55. Chance of precipitation 70 percent. .SATURDAY NIGHT...Rain showers, snow showers likely and chance of thunderstorms. Light snow accumulations. Lows around 35. Chance of precipitation 60 percent. .SUNDAY...Mostly cloudy with a 50 percent chance of rain and snow. Highs 50 to 55. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of rain. Lows 35 to 40. .MEMORIAL DAY...Warmer. Partly cloudy. Highs 60 to 65. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows 40 to 45. Highs 65 to 75. $$ MTZ316-221000- Gates of the Mountains- Including Canyon Creek, Wolf Creek, and Craig 836 PM MDT Tue May 21 2024 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT WEDNESDAY NIGHT TO 6 PM MDT THURSDAY... .REST OF TONIGHT...Mostly cloudy. A 20 percent chance of rain after midnight. Lows 40 to 45. Southwest winds up to 10 mph. .WEDNESDAY...Cloudy. Chance of rain in the morning, then rain showers and chance of thunderstorms in the afternoon. Highs 50 to 60. South winds 5 to 10 mph shifting to the west in the afternoon. Chance of precipitation 90 percent. .WEDNESDAY NIGHT...Colder. Rain showers and chance of thunderstorms in the evening, then snow showers, rain showers and slight chance of thunderstorms after midnight. Snow may be heavy at times after midnight. Snow accumulation of 3 to 6 inches. Lows 30 to 35. Northwest winds 10 to 20 mph. Chance of precipitation near 100 percent. .THURSDAY...Cooler. Rain and snow in the morning, then rain likely and slight chance of snow in the afternoon. Light snow accumulations. Highs 40 to 45. North winds 10 to 20 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy with a 40 percent chance of rain in the evening, then partly cloudy after midnight. Lows 30 to 35. Southwest winds up to 10 mph. .FRIDAY...Not as cool. Mostly cloudy with a 40 percent chance of rain. Highs 55 to 60. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of rain. Lows around 40. .SATURDAY...Rain showers likely and chance of thunderstorms. Highs 55 to 60. Chance of precipitation 70 percent. .SATURDAY NIGHT...Rain showers likely and chance of thunderstorms. Light snow accumulations. Lows 35 to 40. Chance of precipitation 60 percent. .SUNDAY...Mostly cloudy with a 50 percent chance of rain. Highs 55 to 60. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows around 40. .MEMORIAL DAY...Warmer. Partly cloudy. Highs 65 to 70. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows around 45. Highs 75 to 80. $$ MTZ317-221000- Little Belt and Highwood Mountains- Including Monarch, Neihart, and Kings Hill Pass 836 PM MDT Tue May 21 2024 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM MDT THURSDAY... .REST OF TONIGHT...Partly cloudy early in the evening then becoming mostly cloudy. Slight chance of thunderstorms and snow early in the evening, then slight chance of rain and snow after midnight. Lows 35 to 40. Southwest winds up to 10 mph. Chance of precipitation 20 percent. .WEDNESDAY...Cloudy. Chance of rain and snow in the morning, then rain showers and chance of thunderstorms in the afternoon. Little or no snow accumulation. Highs 45 to 50. Southwest winds up to 10 mph. Chance of precipitation 90 percent. .WEDNESDAY NIGHT...Colder. Rain showers, snow and chance of thunderstorms in the evening, then snow showers, rain showers and slight chance of thunderstorms after midnight. Patchy fog after midnight. Some thunderstorms may produce heavy rainfall in the evening. Some thunderstorms may produce heavy rainfall after midnight. Snow may be heavy at times. Snow accumulation of 7 to 10 inches. Snow level 6500 feet. Lows 30 to 35. Northwest winds up to 10 mph. Chance of precipitation near 100 percent. .THURSDAY...Snow and rain in the morning, then snow showers, rain showers and slight chance of thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the afternoon. Heavy snow accumulations. Snow level 5500 feet. Highs 35 to 40. North winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy with chance of rain, snow and slight chance of thunderstorms in the evening, then partly cloudy with slight chance of rain and snow after midnight. Some thunderstorms may produce heavy rainfall in the evening. Lows 25 to 30. West winds up to 10 mph shifting to the southwest after midnight. Chance of precipitation 40 percent. .FRIDAY...Not as cool. Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 50 to 55. Chance of precipitation 50 percent. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows 35 to 40. .SATURDAY...Rain showers likely and chance of thunderstorms. Highs 50 to 55. Chance of precipitation 70 percent. .SATURDAY NIGHT...Rain showers likely, chance of thunderstorms and snow showers. Light snow accumulations. Lows 30 to 40. Chance of precipitation 70 percent. .SUNDAY...Rain showers, snow showers likely and slight chance of thunderstorms. Moderate snow accumulations. Highs 45 to 55. Chance of precipitation 70 percent. .SUNDAY NIGHT...Partly cloudy with chance of rain showers and slight chance of thunderstorms. Lows 35 to 40. Chance of precipitation 30 percent. .MEMORIAL DAY...Warmer. Partly cloudy with a 20 percent chance of thunderstorms. Highs 55 to 65. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows 40 to 45. Highs 65 to 70. $$ MTZ318-221000- Snowy and Judith Mountains- 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Partly cloudy early in the evening then becoming mostly cloudy. A 20 percent chance of thunderstorms early in the evening. Lows 35 to 40. Southwest winds 5 to 10 mph. .WEDNESDAY...Cloudy. Slight chance of rain in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. Highs 50 to 55. Southwest winds 5 to 10 mph. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Colder. Rain showers and chance of thunderstorms in the evening, then rain showers, snow showers and slight chance of thunderstorms after midnight. Snow may be heavy at times after midnight. Snow accumulation of 2 to 5 inches. Lows 30 to 35. Northeast winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Colder. Snow and rain in the morning, then rain showers, snow showers and slight chance of thunderstorms in the afternoon. Heavy snow accumulations. Snow level 5500 feet. Highs 35 to 40. North winds 10 to 15 mph with gusts to around 30 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy with chance of rain and snow in the evening, then partly cloudy with slight chance of rain and snow after midnight. Lows 25 to 30. Northwest winds 5 to 15 mph shifting to the southwest 5 to 10 mph after midnight. Chance of precipitation 40 percent. .FRIDAY...Not as cool. Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 50 to 55. Chance of precipitation 50 percent. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows 35 to 40. .SATURDAY...Rain showers likely and chance of thunderstorms. Highs 55 to 60. Chance of precipitation 70 percent. .SATURDAY NIGHT...Rain showers likely with possible thunderstorms and snow showers. Light snow accumulations. Lows 35 to 40. Chance of precipitation 70 percent. .SUNDAY...Rain showers likely, slight chance of thunderstorms and snow. Moderate snow accumulations. Highs 50 to 55. Chance of precipitation 70 percent. .SUNDAY NIGHT...Partly cloudy with a 40 percent chance of thunderstorms. Lows 35 to 40. .MEMORIAL DAY...Warmer. Partly cloudy with a 20 percent chance of thunderstorms. Highs 60 to 65. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows 40 to 45. Highs 65 to 70. $$ MTZ319-221000- Helena Valley- Including Helena 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Mostly cloudy. A 20 percent chance of rain after midnight. Lows in the mid 40s. South winds up to 10 mph. .WEDNESDAY...Cloudy. Chance of rain in the morning, then rain showers likely and chance of thunderstorms in the afternoon. Highs around 60. South winds up to 10 mph shifting to the southwest in the afternoon. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Colder. Rain showers and chance of thunderstorms in the evening, then rain showers, snow showers and slight chance of thunderstorms after midnight. Snow accumulation up to 2 inches. Lows in the mid 30s. Northwest winds 10 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Cooler. Rain and slight chance of snow in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. Highs 45 to 50. Northwest winds 10 to 15 mph. Gusts up to 30 mph in the morning. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Partly cloudy. A 20 percent chance of rain in the evening. Lows 30 to 35. West winds 5 to 10 mph shifting to the south after midnight. .FRIDAY...Warmer. Mostly cloudy with a 20 percent chance of thunderstorms. Highs 60 to 65. .FRIDAY NIGHT...Mostly cloudy. Lows around 40. .SATURDAY...Rain showers likely and chance of thunderstorms. Highs around 65. Chance of precipitation 70 percent. .SATURDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms and rain. Lows around 40. .SUNDAY...Mostly cloudy with a 40 percent chance of rain. Highs 60 to 65. .SUNDAY NIGHT AND MEMORIAL DAY...Partly cloudy. Lows around 40. Highs around 70. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows around 45. Highs around 80. && TEMPERATURE / PRECIPITATION Helena 47 61 37 48 / 20 90 100 90 $$ MTZ320-221000- Big Belt, Bridger and Castle Mountains- Including Trident, Maudlow, Battle Ridge Pass, Bozeman Pass, and Deep Creek Pass 836 PM MDT Tue May 21 2024 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM MDT THURSDAY... .REST OF TONIGHT...Mostly cloudy. Slight chance of thunderstorms and snow early in the evening, then slight chance of rain and snow after midnight. Lows 35 to 40. Southwest winds 5 to 10 mph. Chance of precipitation 20 percent. .WEDNESDAY...Cloudy. Chance of rain and snow in the morning, then rain showers likely and chance of thunderstorms in the afternoon. Snow accumulation up to 3 inches. Highs 45 to 55. Southwest winds 5 to 15 mph. Chance of precipitation 70 percent. .WEDNESDAY NIGHT...Colder. Rain showers, snow showers and chance of thunderstorms in the evening, then snow showers, rain showers and slight chance of thunderstorms after midnight. Snow may be heavy at times. Snow accumulation of 9 to 12 inches. Snow level 6000 feet. Lows 30 to 35. Northwest winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Colder. Snow in the morning, then snow showers, rain and slight chance of thunderstorms in the afternoon. Heavy snow accumulations. Snow level 5500 feet. Highs 35 to 40. Northwest winds 10 to 15 mph. Gusts up to 30 mph in the morning. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy with a 40 percent chance of rain and snow in the evening, then partly cloudy after midnight. Lows 25 to 30. West winds 5 to 10 mph shifting to the southwest after midnight. .FRIDAY...Not as cool. Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 50 to 55. Chance of precipitation 40 percent. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of rain. Lows 35 to 40. .SATURDAY...Rain showers likely and chance of thunderstorms. Highs 50 to 60. Chance of precipitation 70 percent. .SATURDAY NIGHT...Rain showers likely, chance of thunderstorms and snow showers. Moderate snow accumulations. Lows 30 to 35. Chance of precipitation 70 percent. .SUNDAY...Mostly cloudy with chance of rain, snow and slight chance of thunderstorms. Highs 45 to 55. Chance of precipitation 50 percent. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows around 35. .MEMORIAL DAY...Warmer. Partly cloudy with a 20 percent chance of rain. Highs 55 to 65. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows 40 to 45. Highs 65 to 75. $$ MTZ321-221000- Meagher County Valleys- Including Martinsdale, Checkerboard, Ringling, and White Sulphur Springs 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Mostly cloudy. Slight chance of thunderstorms early in the evening, then slight chance of rain after midnight. Lows 35 to 40. South winds up to 10 mph. Chance of precipitation 20 percent. .WEDNESDAY...Cloudy. Chance of rain in the morning, then chance of thunderstorms in the afternoon. Highs 50 to 55. Southwest winds 5 to 15 mph. Chance of precipitation 50 percent. .WEDNESDAY NIGHT...Colder. Rain showers and chance of thunderstorms in the evening, then snow showers, rain showers and slight chance of thunderstorms after midnight. Snow accumulation of 1 to 4 inches. Lows around 30. Northwest winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Snow and rain in the morning, then rain showers, snow showers and slight chance of thunderstorms in the afternoon. Moderate snow accumulations. Snow level 5500 feet. Highs 40 to 45. Northwest winds 10 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy with a 40 percent chance of rain in the evening, then partly cloudy after midnight. Lows 25 to 30. West winds 5 to 10 mph shifting to the southwest after midnight. .FRIDAY...Not as cool. Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 55 to 60. Chance of precipitation 40 percent. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows around 35. .SATURDAY...Rain showers likely and chance of thunderstorms. Highs 55 to 60. Chance of precipitation 70 percent. .SATURDAY NIGHT...Rain showers likely with possible thunderstorms and snow showers. Lows around 35. Chance of precipitation 70 percent. .SUNDAY...Mostly cloudy with chance of rain showers, slight chance of thunderstorms and snow. Highs 50 to 55. Chance of precipitation 50 percent. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows around 35. .MEMORIAL DAY...Warmer. Partly cloudy with a 20 percent chance of rain. Highs 60 to 65. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows around 40. Highs 70 to 75. $$ MTZ322-221000- Elkhorn and Boulder Mountains- Including Montana City, Clancy, Boulder, Corbin, Wickes, Elk Park Pass, and Homestake Pass 836 PM MDT Tue May 21 2024 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM WEDNESDAY TO NOON MDT THURSDAY... .REST OF TONIGHT...Mostly cloudy with a 20 percent chance of rain and snow. Lows 35 to 40. Southwest winds up to 10 mph. .WEDNESDAY...Chance of rain and snow in the morning, then rain showers, snow showers and chance of thunderstorms in the afternoon. Snow accumulation up to 3 inches. Snow level 7000 feet. Highs 45 to 55. Southwest winds 5 to 10 mph. Chance of precipitation near 100 percent. .WEDNESDAY NIGHT...Colder. Snow showers, rain showers and chance of thunderstorms in the evening, then snow showers and slight chance of thunderstorms after midnight. Snow may be heavy at times. Snow accumulation of 11 to 17 inches. Snow level 5500 feet. Lows 25 to 35. Northwest winds 5 to 15 mph. Gusts up to 30 mph after midnight. Chance of precipitation near 100 percent. .THURSDAY...Colder. Snow in the morning, then snow showers, rain showers and slight chance of thunderstorms in the afternoon. Heavy snow accumulations. Snow level 5500 feet. Highs 35 to 40. Northwest winds 10 to 15 mph. Gusts up to 30 mph in the morning. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy with a 30 percent chance of rain and snow in the evening, then partly cloudy after midnight. Lows 25 to 30. West winds up to 10 mph. .FRIDAY...Not as cool. Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 45 to 55. Chance of precipitation 40 percent. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows 30 to 40. .SATURDAY...Rain showers likely with possible thunderstorms and snow showers. Highs 50 to 55. Chance of precipitation 70 percent. .SATURDAY NIGHT...Rain showers likely, chance of thunderstorms and snow showers. Moderate snow accumulations. Lows 30 to 35. Chance of precipitation 70 percent. .SUNDAY...Mostly cloudy with chance of rain showers, snow showers and slight chance of thunderstorms. Highs 45 to 55. Chance of precipitation 50 percent. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms and snow showers. Lows 30 to 35. .MEMORIAL DAY...Warmer. Partly cloudy. Highs 55 to 65. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows 35 to 45. Highs 65 to 75. $$ MTZ323-221000- Canyon Ferry Area- Including Toston, Townsend, and Winston 836 PM MDT Tue May 21 2024 .REST OF TONIGHT...Mostly cloudy. A 20 percent chance of rain after midnight. Lows 40 to 45. Southeast winds 5 to 10 mph. .WEDNESDAY...Cloudy. Chance of rain in the morning, then chance of thunderstorms in the afternoon. Highs 55 to 60. Southwest winds 5 to 15 mph. Chance of precipitation 50 percent. .WEDNESDAY NIGHT...Colder. Rain showers and chance of thunderstorms in the evening, then rain showers, snow showers and slight chance of thunderstorms after midnight. Snow accumulation up to 2 inches. Lows 30 to 35. Northwest winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Cooler. Rain and slight chance of snow in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. Light snow accumulations. Highs around 45. Northwest winds 10 to 20 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy with a 20 percent chance of rain in the evening, then partly cloudy after midnight. Lows 30 to 35. West winds 5 to 10 mph shifting to the south after midnight. .FRIDAY...Not as cool. Partly cloudy with a 20 percent chance of thunderstorms. Highs around 60. .FRIDAY NIGHT...Mostly cloudy. Lows around 40. .SATURDAY...Rain showers likely and chance of thunderstorms. Highs 60 to 65. Chance of precipitation 70 percent. .SATURDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows 35 to 40. .SUNDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 55 to 60. Chance of precipitation 50 percent. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 35 to 40. .MEMORIAL DAY AND MONDAY NIGHT...Partly cloudy. Highs 65 to 70. Lows 40 to 45. .TUESDAY...Warmer, sunny. Highs 75 to 80. $$ MTZ324-221000- Missouri Headwaters- Including Harrison, Three Forks, Willow Creek, Pony, and Whitehall 836 PM MDT Tue May 21 2024 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM MDT THURSDAY... .REST OF TONIGHT...Mostly cloudy. A 20 percent chance of rain after midnight. Lows 40 to 45. Southwest winds 5 to 10 mph. .WEDNESDAY...Cloudy. Chance of rain in the morning, then chance of thunderstorms in the afternoon. Highs 55 to 60. Southwest winds 10 to 15 mph. Chance of precipitation 50 percent. .WEDNESDAY NIGHT...Colder. Rain showers and chance of thunderstorms in the evening, then snow showers, rain showers and slight chance of thunderstorms after midnight. Snow accumulation up to 3 inches. Lows 30 to 35. Northwest winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Cooler. Snow and rain in the morning, then rain showers likely, slight chance of thunderstorms and snow showers in the afternoon. Moderate snow accumulations. Highs 40 to 45. Northwest winds 10 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Partly cloudy. A 20 percent chance of rain in the evening. Lows around 30. West winds up to 10 mph. .FRIDAY...Not as cool. Partly cloudy with a 20 percent chance of rain. Highs around 60. .FRIDAY NIGHT...Mostly cloudy. Lows 35 to 40. .SATURDAY...Rain showers likely and chance of thunderstorms. Highs 60 to 65. Chance of precipitation 70 percent. .SATURDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows 35 to 40. .SUNDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 55 to 60. Chance of precipitation 50 percent. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 35 to 40. .MEMORIAL DAY AND MONDAY NIGHT...Mostly clear. Highs 65 to 70. Lows 40 to 45. .TUESDAY...Warmer, sunny. Highs 75 to 80. $$ MTZ325-221000- Madison River Valley- Including Cameron, Ennis, Jeffers, McAllister, and Norris 836 PM MDT Tue May 21 2024 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM MDT THURSDAY... .REST OF TONIGHT...Mostly cloudy. A 20 percent chance of rain after midnight. Lows 35 to 40. South winds 5 to 15 mph. .WEDNESDAY...Breezy, cloudy. Chance of rain and snow in the morning, then chance of thunderstorms in the afternoon. Highs 50 to 55. South winds 15 to 25 mph. Chance of precipitation 50 percent. .WEDNESDAY NIGHT...Colder. Rain showers, chance of thunderstorms and snow showers in the evening, then snow showers, rain showers and slight chance of thunderstorms after midnight. Snow accumulation up to 2 inches. Lows around 30. West winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Snow in the morning, then rain showers, snow showers and slight chance of thunderstorms in the afternoon. Light snow accumulations. Snow level 5500 feet. Highs 40 to 45. West winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy with a 20 percent chance of rain in the evening, then partly cloudy after midnight. Lows around 30. West winds 5 to 10 mph shifting to the south after midnight. .FRIDAY...Not as cool. Partly cloudy with a 20 percent chance of thunderstorms. Highs 55 to 60. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows 35 to 40. .SATURDAY...Rain showers likely and chance of thunderstorms. Highs 55 to 60. Chance of precipitation 60 percent. .SATURDAY NIGHT...Rain showers likely with possible thunderstorms and snow showers. Lows 30 to 35. Chance of precipitation 60 percent. .SUNDAY...Mostly cloudy with chance of rain showers, snow and slight chance of thunderstorms. Highs around 55. Chance of precipitation 50 percent. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows around 35. .MEMORIAL DAY AND MONDAY NIGHT...Warmer. Mostly clear. Highs 65 to 70. Lows 40 to 45. .TUESDAY...Sunny. Highs around 75. $$ MTZ326-221000- Gallatin Valley- Including Bozeman and Gallatin Gateway 836 PM MDT Tue May 21 2024 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM MDT THURSDAY... .REST OF TONIGHT...Mostly cloudy. Lows around 40. Southeast winds 5 to 10 mph. .WEDNESDAY...Cloudy. Chance of rain in the morning, then chance of thunderstorms and rain in the afternoon. Highs 55 to 60. Southwest winds 5 to 15 mph. Chance of precipitation 50 percent. .WEDNESDAY NIGHT...Colder. Rain showers and chance of thunderstorms in the evening, then rain showers, snow showers and slight chance of thunderstorms after midnight. Patchy fog after midnight. Snow accumulation up to 1 inch. Lows 30 to 35. Northwest winds up to 10 mph. Chance of precipitation near 100 percent. .THURSDAY...Cooler. Patchy fog in the morning. Snow and rain in the morning, then rain showers, slight chance of thunderstorms and snow showers in the afternoon. Moderate snow accumulations. Highs around 45. West winds 5 to 10 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy with a 20 percent chance of rain in the evening, then partly cloudy after midnight. Lows around 30. West winds 5 to 10 mph shifting to the south after midnight. .FRIDAY...Not as cool. Partly cloudy with a 20 percent chance of thunderstorms. Highs 55 to 60. .FRIDAY NIGHT...Mostly cloudy. Lows 35 to 40. .SATURDAY...Rain showers likely and chance of thunderstorms. Highs around 60. Chance of precipitation 60 percent. .SATURDAY NIGHT...Rain showers likely and chance of thunderstorms. Lows 35 to 40. Chance of precipitation 70 percent. .SUNDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 55 to 60. Chance of precipitation 50 percent. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 35 to 40. .MEMORIAL DAY AND MONDAY NIGHT...Mostly clear. Highs 65 to 70. Lows 40 to 45. .TUESDAY...Sunny. Highs around 75. && TEMPERATURE / PRECIPITATION Bozeman Airport 38 60 32 45 / 10 80 100 100 Bozeman MSU 39 58 33 43 / 10 80 90 100 $$ MTZ330-221000- Gallatin and Madison County Mountains and Centennial Mountains- Including Big Sky, West Yellowstone, Targhee Pass, and Raynolds Pass 836 PM MDT Tue May 21 2024 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM MDT THURSDAY... .REST OF TONIGHT...Mostly cloudy. Slight chance of rain and snow early in the evening, then slight chance of snow after midnight. Lows 30 to 35. Southwest winds 5 to 15 mph. Chance of precipitation 20 percent. .WEDNESDAY...Breezy. Chance of snow and rain in the morning, then rain showers, snow showers and chance of thunderstorms in the afternoon. Snow accumulation of 4 to 7 inches. Snow level 7000 feet. Highs 40 to 50. South winds 15 to 25 mph. Chance of precipitation near 100 percent. .WEDNESDAY NIGHT...Colder. Snow showers, rain showers and chance of thunderstorms in the evening, then snow showers and slight chance of thunderstorms after midnight. Snow accumulation of 6 to 9 inches. Lows 20 to 30. Southwest winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Snow in the morning, then snow showers and slight chance of thunderstorms in the afternoon. Heavy snow accumulations. Highs 30 to 40. West winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy with chance of snow and slight chance of rain in the evening, then partly cloudy after midnight. Lows 20 to 25. Northwest winds 5 to 10 mph shifting to the southwest after midnight. Chance of precipitation 40 percent. .FRIDAY...Not as cool. Partly cloudy with chance of rain showers, snow showers and slight chance of thunderstorms. Highs 45 to 55. Chance of precipitation 40 percent. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of thunderstorms. Lows 30 to 35. .SATURDAY...Rain showers, snow showers likely and chance of thunderstorms. Light snow accumulations. Highs 45 to 55. Chance of precipitation 70 percent. .SATURDAY NIGHT...Rain showers likely, chance of thunderstorms and snow showers. Heavy snow accumulations. Lows 25 to 35. Chance of precipitation 70 percent. .SUNDAY...Mostly cloudy with chance of snow showers, rain showers and slight chance of thunderstorms. Highs 40 to 50. Chance of precipitation 50 percent. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms and snow showers. Lows 25 to 30. .MEMORIAL DAY AND MONDAY NIGHT...Mostly clear. Highs 50 to 60. Lows 35 to 40. .TUESDAY...Warmer, sunny. Highs 60 to 70. && TEMPERATURE / PRECIPITATION West Yellowstone 30 48 25 41 / 20 90 90 90 $$ MTZ327-221000- Northwest Beaverhead County- Including Dewey, Wisdom, Wise River, Big Hole Pass, and Chief Joseph Pass 836 PM MDT Tue May 21 2024 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM WEDNESDAY TO NOON MDT THURSDAY... .REST OF TONIGHT...Mostly cloudy. Slight chance of snow early in the evening, then slight chance of rain and snow after midnight. Lows in the mid 30s. Southwest winds 5 to 10 mph. Chance of precipitation 20 percent. .WEDNESDAY...Chance of snow and rain in the morning, then snow showers, rain showers and chance of thunderstorms in the afternoon. Snow accumulation of 3 to 6 inches. Snow level 7000 feet. Highs 40 to 50. Southwest winds 5 to 15 mph shifting to the west in the afternoon. Chance of precipitation near 100 percent. .WEDNESDAY NIGHT...Colder. Snow showers and chance of thunderstorms in the evening, then snow showers and slight chance of thunderstorms after midnight. Snow may be heavy at times after midnight. Snow accumulation of 6 to 12 inches. Lows 20 to 25. Northwest winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Snow in the morning, then snow showers, rain showers likely and slight chance of thunderstorms in the afternoon. Moderate snow accumulations. Highs 35 to 40. Northwest winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Partly cloudy. A 20 percent chance of rain and snow in the evening. Lows 20 to 25. West winds up to 10 mph. .FRIDAY...Not as cool. Partly cloudy with a 20 percent chance of rain and snow. Highs 45 to 50. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of rain and snow. Lows 30 to 35. .SATURDAY...Rain showers, snow showers likely and chance of thunderstorms. Light snow accumulations. Highs 45 to 55. Chance of precipitation 70 percent. .SATURDAY NIGHT...Snow showers likely and chance of thunderstorms. Heavy snow accumulations. Lows 25 to 30. Chance of precipitation 70 percent. .SUNDAY...Mostly cloudy with a 50 percent chance of snow. Highs 45 to 50. .SUNDAY NIGHT...Partly cloudy. Lows 25 to 30. .MEMORIAL DAY AND MONDAY NIGHT...Mostly clear. Highs 55 to 60. Lows 35 to 40. .TUESDAY...Warmer, sunny. Highs 60 to 70. $$ MTZ328-221000- Beaverhead and Western Madison below 6000ft- Including Bannack, Dillon, Glen, and Waterloo 836 PM MDT Tue May 21 2024 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM MDT THURSDAY... .REST OF TONIGHT...Mostly cloudy. A 20 percent chance of rain and snow after midnight. Lows 40 to 45. Southwest winds 5 to 10 mph. .WEDNESDAY...Cloudy. Chance of rain and snow in the morning, then chance of thunderstorms in the afternoon. Highs 50 to 60. Southwest winds 10 to 15 mph. Chance of precipitation 50 percent. .WEDNESDAY NIGHT...Colder. Rain showers, snow showers and chance of thunderstorms in the evening, then snow showers and slight chance of thunderstorms after midnight. Snow accumulation of 7 to 10 inches. Snow level 5500 feet. Lows around 30. Northwest winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Cooler. Snow in the morning, then rain showers, snow showers likely and slight chance of thunderstorms in the afternoon. Heavy snow accumulations. Snow level 5500 feet. Highs 40 to 45. Northwest winds 5 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Partly cloudy. A 20 percent chance of rain in the evening. Lows 25 to 30. Northwest winds 5 to 10 mph shifting to the southwest after midnight. .FRIDAY...Not as cool. Partly cloudy with a 20 percent chance of rain. Highs 55 to 60. .FRIDAY NIGHT...Mostly cloudy. Lows around 35. .SATURDAY...Rain showers likely and chance of thunderstorms. Highs 55 to 60. Chance of precipitation 70 percent. .SATURDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms and snow showers. Lows around 35. .SUNDAY...Mostly cloudy with chance of rain showers, snow and slight chance of thunderstorms. Highs 50 to 60. Chance of precipitation 50 percent. .SUNDAY NIGHT AND MEMORIAL DAY...Warmer. Mostly clear. Lows 30 to 35. Highs 65 to 70. .MONDAY NIGHT AND TUESDAY...Mostly clear. Lows 40 to 45. Highs 70 to 80. && TEMPERATURE / PRECIPITATION Dillon 42 57 30 44 / 20 90 90 90 $$ MTZ329-221000- Ruby Mountains and Southern Beaverhead Mountains- Including Monida Pass 836 PM MDT Tue May 21 2024 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM WEDNESDAY TO NOON MDT THURSDAY... .REST OF TONIGHT...Mostly cloudy. A 20 percent chance of snow after midnight. Lows 35 to 40. Southwest winds 5 to 15 mph. .WEDNESDAY...Breezy. Chance of snow and rain in the morning, then rain showers, snow showers and chance of thunderstorms in the afternoon. Snow accumulation up to 3 inches. Snow level 7500 feet. Highs 45 to 50. South winds 15 to 25 mph. Chance of precipitation near 100 percent. .WEDNESDAY NIGHT...Colder. Snow showers, chance of thunderstorms and rain showers in the evening, then snow showers and slight chance of thunderstorms after midnight. Snow accumulation of 2 to 5 inches. Lows in the mid 20s. West winds 10 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY...Snow in the morning, then snow showers and slight chance of thunderstorms in the afternoon. Moderate snow accumulations. Highs 35 to 40. Northwest winds 10 to 15 mph. Chance of precipitation near 100 percent. .THURSDAY NIGHT...Mostly cloudy with a 20 percent chance of rain and snow in the evening, then partly cloudy after midnight. Lows 20 to 25. Northwest winds 5 to 15 mph shifting to the southwest after midnight. .FRIDAY...Not as cool. Partly cloudy with a 20 percent chance of rain and snow. Highs 45 to 55. .FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of rain. Lows 30 to 35. .SATURDAY...Rain showers, snow showers likely and chance of thunderstorms. Highs 45 to 55. Chance of precipitation 70 percent. .SATURDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms and snow showers. Lows around 30. .SUNDAY...Mostly cloudy with chance of snow showers and slight chance of thunderstorms. Highs 45 to 55. Chance of precipitation 40 percent. .SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Lows 30 to 40. Highs 55 to 65. .TUESDAY...Sunny. Highs 65 to 70. $$ http://www.weather.gov/greatfalls https://www.twitter.com/NWSGreatFalls https://www.facebook.com/NWSGreatFalls