FPUS55 KMSO 180623 ZFPMSO Zone Forecast Product National Weather Service Missoula MT 1223 AM MDT Sat Apr 18 2026 MTZ001-182200- Kootenai/Cabinet Region- Including the cities of Libby and Eureka 1223 AM MDT Sat Apr 18 2026 .TODAY...Mostly sunny. Highs in the upper 50s to mid 60s. .TONIGHT...Mostly clear. Lows in the upper 20s to mid 30s. .SUNDAY...Mostly sunny. Highs in the mid 60s to lower 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .MONDAY...Mostly sunny. Highs in the 70s. .MONDAY NIGHT...Partly cloudy. Lows in the 40s. .TUESDAY...Partly cloudy. Highs in the mid 70s to lower 80s. .TUESDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with a 30 percent chance of rain after midnight. Lows in the 40s to lower 50s. .WEDNESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Cooler. Highs in the upper 50s to mid 60s. .WEDNESDAY NIGHT...Rain likely. Chance of rain 70 percent. Lows in the mid 30s to lower 40s. .THURSDAY...Mostly cloudy with a 40 percent chance of rain. Highs in the 50s. .THURSDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows in the upper 20s to mid 30s. .FRIDAY...Partly cloudy. Highs in the mid 50s to lower 60s. $$ MTZ002-182200- West Glacier Region- Including the city of Swan Lake 1223 AM MDT Sat Apr 18 2026 .TODAY...Mostly sunny. Highs in the mid 40s to lower 50s. Southwest winds to 15 mph. .TONIGHT...Mostly clear. Lows in the mid 20s to lower 30s. South winds to 15 mph. .SUNDAY...Mostly sunny. Highs in the mid 50s to lower 60s. .SUNDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid 30s to lower 40s. .MONDAY...Mostly sunny. Highs in the 60s. .MONDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .TUESDAY...Partly cloudy. Highs in the mid 60s to lower 70s. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. A 20 percent chance of rain. Lows in the upper 30s to mid 40s. .WEDNESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 90 percent. Highs in the 50s. .WEDNESDAY NIGHT...Rain and snow likely. Chance of precipitation 90 percent. Lows in the 30s. .THURSDAY...Rain and snow likely in the morning, then a chance of rain and snow in the afternoon. Chance of precipitation 70 percent. Highs in the 40s. .THURSDAY NIGHT...Mostly cloudy with a chance of snow and a slight chance of rain in the evening, then partly cloudy with a slight chance of snow after midnight. Chance of precipitation 30 percent. Lows in the 20s to lower 30s. .FRIDAY...Mostly cloudy. Slight chance of snow in the morning, then a chance of rain and snow in the afternoon. Chance of precipitation 40 percent. Highs in the 40s. $$ MTZ003-182200- Flathead/Mission Valleys- Including the cities of Kalispell, Polson, and St. Ignatius 1223 AM MDT Sat Apr 18 2026 .TODAY...Mostly sunny. Highs in the 50s to lower 60s. Southwest winds to 15 mph. .TONIGHT...Mostly clear. Lows in the upper 20s to mid 30s. .SUNDAY...Mostly sunny. Highs in the 60s. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .MONDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .MONDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .TUESDAY...Partly cloudy. Highs in the 70s. .TUESDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with a 20 percent chance of rain after midnight. Lows in the 40s. .WEDNESDAY...A chance of rain in the morning, then rain showers likely and a chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Highs in the upper 50s to mid 60s. .WEDNESDAY NIGHT...Rain likely. Chance of rain 80 percent. Lows in the mid 30s to lower 40s. .THURSDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the upper 40s to mid 50s. .THURSDAY NIGHT...Mostly cloudy with a 20 percent chance of rain and snow in the evening, then partly cloudy after midnight. Lows in the upper 20s to mid 30s. .FRIDAY...Partly cloudy with a slight chance of snow. Slight chance of rain in the afternoon. Chance of precipitation 20 percent. Highs in the upper 40s to mid 50s. $$ MTZ004-182200- Lower Clark Fork Region- Including the cities of Noxon, Thompson Falls, and Superior 1223 AM MDT Sat Apr 18 2026 .TODAY...Partly cloudy. Patchy fog early in the morning. Highs in the mid 50s to lower 60s. Southwest winds to 15 mph. .TONIGHT...Mostly clear. Lows in the upper 20s to mid 30s. .SUNDAY...Mostly sunny. Highs in the mid 60s to lower 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .MONDAY...Mostly sunny. Highs in the 70s. .MONDAY NIGHT...Mostly clear. Lows in the 40s. .TUESDAY...Partly cloudy. Highs in the 70s to lower 80s. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. A 40 percent chance of rain. Lows in the 40s. .WEDNESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Cooler. Highs in the 50s to lower 60s. .WEDNESDAY NIGHT...Rain likely in the evening, then rain and snow likely after midnight. Chance of precipitation 80 percent. Lows in the mid 30s to lower 40s. .THURSDAY...A chance of rain. Snow likely in the morning, then a chance of snow in the afternoon. Chance of precipitation 60 percent. Highs in the upper 40s to mid 50s. .THURSDAY NIGHT...Mostly cloudy with a chance of rain and a slight chance of snow in the evening, then partly cloudy after midnight. Chance of precipitation 30 percent. Lows in the upper 20s to mid 30s. .FRIDAY...Partly cloudy with a 20 percent chance of snow. Highs in the upper 40s to mid 50s. $$ MTZ005-182200- Missoula/Bitterroot Valleys- Including the cities of Hamilton and Darby 1223 AM MDT Sat Apr 18 2026 .TODAY...Partly cloudy. Highs near 60. Southwest winds to 15 mph. .TONIGHT...Mostly clear. Lows near 30. .SUNDAY...Mostly sunny. Highs near 70. .SUNDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows near 40. .MONDAY...Partly cloudy. Highs in the mid to upper 70s. .MONDAY NIGHT...Partly cloudy. Lows in the lower to mid 40s. .TUESDAY...Partly cloudy. Highs near 80. .TUESDAY NIGHT...Partly cloudy. A 20 percent chance of rain after midnight. Lows in the 40s. .WEDNESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Cooler. Highs in the lower 60s. .WEDNESDAY NIGHT...Rain likely. Chance of rain 70 percent. Lows in the mid 30s to lower 40s. .THURSDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the lower 50s. .THURSDAY NIGHT...Mostly cloudy. A 20 percent chance of rain in the evening. Lows near 30. .FRIDAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the lower to mid 50s. $$ MTZ006-182200- Bitterroot/Sapphire Mountains- Including the city of Sula 1223 AM MDT Sat Apr 18 2026 .TODAY...Partly cloudy. Highs in the upper 40s to mid 50s. Southwest winds to 15 mph. .TONIGHT...Mostly clear. Lows in the mid 20s to lower 30s. .SUNDAY...Mostly sunny. Highs in the upper 50s to mid 60s. .SUNDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows in the 30s to lower 40s. .MONDAY...Mostly sunny. Highs in the mid 60s to lower 70s. .MONDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .TUESDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. A 30 percent chance of rain. Lows in the upper 30s to mid 40s. .WEDNESDAY...Rain and snow likely in the morning, then rain showers, snow showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 90 percent. Highs in the 50s. .WEDNESDAY NIGHT...Rain and snow likely. Chance of precipitation 80 percent. Lows in the 30s. .THURSDAY...Rain and snow likely in the morning, then a chance of rain and snow in the afternoon. Chance of precipitation 70 percent. Highs in the 40s. .THURSDAY NIGHT...Mostly cloudy. A chance of rain and snow in the evening, then slight chance of snow after midnight. Chance of precipitation 40 percent. Lows in the 20s to lower 30s. .FRIDAY...Partly cloudy with a slight chance of snow. Slight chance of rain in the afternoon. Chance of precipitation 20 percent. Highs in the 40s to lower 50s. $$ MTZ007-182200- Butte/Blackfoot Region- Including the cities of Anaconda, Deer Lodge, and Drummond 1223 AM MDT Sat Apr 18 2026 .TODAY...Mostly sunny. Highs in the upper 40s to mid 50s. West winds to 15 mph in the afternoon. .TONIGHT...Mostly clear. Lows in the mid 20s to lower 30s. Southwest winds to 15 mph. .SUNDAY...Mostly sunny. Highs in the upper 50s to mid 60s. .SUNDAY NIGHT...Partly cloudy. Lows in the 30s to lower 40s. .MONDAY...Partly cloudy. Highs in the mid 60s to lower 70s. Southwest winds to 15 mph. .MONDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .TUESDAY...Partly cloudy. Highs in the upper 60s to mid 70s. .TUESDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .WEDNESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 90 percent. Highs in the mid 50s to lower 60s. .WEDNESDAY NIGHT...Rain with snow likely. Chance of precipitation 80 percent. Lows in the upper 20s to mid 30s. .THURSDAY...Snow with rain likely in the morning, then chance of valley rain with mountain snow likely in the afternoon. Chance of precipitation 80 percent. Cooler. Highs in the upper 30s to mid 40s. .THURSDAY NIGHT...Mostly cloudy with a 40 percent chance of snow. Lows in the 20s. .FRIDAY...Mostly cloudy with a 20 percent chance of snow. Highs in the 40s. $$ MTZ043-182200- Potomac/Seeley Lake Region- Including the cities of East Missoula, Seeley Lake, and Clinton 1223 AM MDT Sat Apr 18 2026 .TODAY...Mostly sunny. Patchy fog early in the morning. Highs in the upper 40s to mid 50s. .TONIGHT...Mostly clear. Lows in the mid 20s to lower 30s. .SUNDAY...Mostly sunny. Highs in the 60s. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .MONDAY...Mostly sunny. Highs in the mid 60s to lower 70s. .MONDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .TUESDAY...Partly cloudy. Highs in the 70s. .TUESDAY NIGHT...Partly cloudy. A 20 percent chance of rain after midnight. Lows in the 40s. .WEDNESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 80 percent. Highs in the mid 50s to lower 60s. .WEDNESDAY NIGHT...Rain likely in the evening, then rain and snow likely after midnight. Chance of precipitation 80 percent. Lows in the 30s. .THURSDAY...Rain and snow likely in the morning, then a chance of rain and snow in the afternoon. Chance of precipitation 70 percent. Highs in the 40s. .THURSDAY NIGHT...Mostly cloudy. A chance of rain and snow in the evening, then slight chance of snow after midnight. Chance of precipitation 30 percent. Lows in the mid 20s to lower 30s. .FRIDAY...Mostly cloudy with a slight chance of snow. Slight chance of rain in the afternoon. Chance of precipitation 20 percent. Highs in the 40s to lower 50s. $$ IDZ009-182200- Western Lemhi County- Including the city of Shoup 1223 AM MDT Sat Apr 18 2026 .TODAY...Mostly cloudy. Highs in the 50s. .TONIGHT...Mostly clear. Lows in the upper 20s to mid 30s. .SUNDAY...Mostly sunny. Highs in the 60s. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .MONDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .MONDAY NIGHT...Mostly clear. Lows in the 40s. .TUESDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .TUESDAY NIGHT...Partly cloudy. A 20 percent chance of rain after midnight. Lows in the 40s. .WEDNESDAY...A chance of rain in the morning, then rain showers, snow showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 80 percent. Highs in the mid 50s to lower 60s. .WEDNESDAY NIGHT...Rain and snow likely. Chance of precipitation 70 percent. Lows in the mid 30s to lower 40s. .THURSDAY...Rain and snow likely in the morning, then a chance of rain and snow in the afternoon. Chance of precipitation 70 percent. Highs in the mid 40s to lower 50s. .THURSDAY NIGHT...Mostly cloudy. A chance of rain and snow in the evening, then slight chance of snow after midnight. Chance of precipitation 30 percent. Lows in the upper 20s to mid 30s. .FRIDAY...Partly cloudy with a slight chance of snow. Slight chance of rain in the afternoon. Chance of precipitation 20 percent. Highs in the upper 40s to mid 50s. $$ IDZ010-182200- Eastern Lemhi County- Including the cities of Salmon and Leadore 1223 AM MDT Sat Apr 18 2026 .TODAY...Partly cloudy. Highs in the upper 40s to mid 50s. .TONIGHT...Mostly clear. Lows in the mid 20s to lower 30s. .SUNDAY...Mostly sunny. Highs in the 60s. .SUNDAY NIGHT...Mostly cloudy. Lows in the mid 30s to lower 40s. .MONDAY...Mostly sunny. Highs in the mid 60s to lower 70s. South winds to 15 mph. .MONDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .TUESDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .TUESDAY NIGHT...Partly cloudy. A 30 percent chance of rain after midnight. Lows in the upper 30s to mid 40s. .WEDNESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Highs in the mid 50s to lower 60s. .WEDNESDAY NIGHT...Rain and snow likely. Chance of precipitation 80 percent. Lows in the 30s. .THURSDAY...Rain and snow likely in the morning, then a chance of rain and snow in the afternoon. Chance of precipitation 70 percent. Highs in the mid 40s to lower 50s. .THURSDAY NIGHT...Mostly cloudy. A chance of snow and a slight chance of rain in the evening, then slight chance of snow after midnight. Chance of precipitation 40 percent. Lows in the mid 20s to lower 30s. .FRIDAY...Partly cloudy with a 30 percent chance of snow. Highs in the mid 40s to lower 50s. $$ IDZ005-182200- Northern Clearwater Mountains- Including the cities of Pierce and Elk River 1123 PM PDT Fri Apr 17 2026 .TODAY...Mostly cloudy. Highs in the mid 50s to lower 60s. .TONIGHT...Mostly clear. Lows in the upper 20s to mid 30s. .SUNDAY...Partly cloudy. Highs in the mid 60s to lower 70s. .SUNDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 30s to lower 40s. .MONDAY...Partly cloudy. Highs in the 70s. .MONDAY NIGHT...Mostly clear. Lows in the upper 30s to mid 40s. .TUESDAY...Partly cloudy. Highs in the 70s. .TUESDAY NIGHT...Chance of rain showers and a slight chance of thunderstorms in the evening, then rain likely after midnight. Chance of precipitation 60 percent. Lows in the upper 30s to mid 40s. .WEDNESDAY...Rain likely. Chance of rain 90 percent. Cooler. Highs in the upper 40s to mid 50s. .WEDNESDAY NIGHT...Rain likely. Chance of rain 80 percent. Lows in the 30s to lower 40s. .THURSDAY...Rain likely in the morning, then a chance of rain in the afternoon. Chance of rain 70 percent. Highs in the mid 40s to lower 50s. .THURSDAY NIGHT...Mostly cloudy. A 20 percent chance of rain in the evening. Lows in the upper 20s to mid 30s. .FRIDAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the 50s. $$ IDZ006-182200- Southern Clearwater Mountains- Including the cities of Powell, Elk City, and Dixie 1123 PM PDT Fri Apr 17 2026 .TODAY...Mostly cloudy. Patchy fog early in the morning. Highs in the upper 40s to lower 60s. .TONIGHT...Mostly clear. Lows in the mid 20s to upper 30s. .SUNDAY...Partly cloudy. Highs in the 60s to lower 70s. .SUNDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows in the 30s to mid 40s. .MONDAY...Partly cloudy. Highs in the 60s to mid 70s. .MONDAY NIGHT...Partly cloudy. Lows 36 to 49. .TUESDAY...Partly cloudy. Highs in the 60s to upper 70s. .TUESDAY NIGHT...A chance of rain in the evening, then rain likely after midnight. Chance of rain 60 percent. Lows in the upper 30s to lower 50s. .WEDNESDAY...Rain likely in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 90 percent. Cooler. Highs in the 40s to mid 50s. .WEDNESDAY NIGHT...Rain likely in the evening, then rain and snow likely after midnight. Chance of precipitation 80 percent. Lows in the 30s to lower 40s. .THURSDAY...Rain and snow likely. Chance of precipitation 80 percent. Highs in the 40s to lower 50s. .THURSDAY NIGHT...Mostly cloudy with a 30 percent chance of rain and snow. Lows in the 20s to upper 30s. .FRIDAY...Partly cloudy with a 20 percent chance of rain and snow. Highs in the mid 40s to upper 50s. $$ IDZ007-182200- Orofino/Grangeville Region- Including the city of Kooskia 1123 PM PDT Fri Apr 17 2026 .TODAY...Mostly cloudy. Highs in the upper 50s to mid 60s. .TONIGHT...Mostly clear. Lows in the mid 30s to lower 40s. .SUNDAY...Partly cloudy. Highs in the upper 60s to mid 70s. .SUNDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows in the 40s. .MONDAY...Partly cloudy. Highs in the 70s. .MONDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower 50s. .TUESDAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the 70s to lower 80s. .TUESDAY NIGHT...Chance of rain showers and a slight chance of thunderstorms in the evening, then rain likely after midnight. Chance of precipitation 70 percent. Lows in the mid 40s to lower 50s. .WEDNESDAY...Rain likely. Chance of rain 90 percent. Cooler. Highs in the 50s. .WEDNESDAY NIGHT...Rain likely. Chance of rain 80 percent. Lows in the upper 30s to mid 40s. .THURSDAY...Rain likely in the morning, then a chance of rain in the afternoon. Chance of rain 70 percent. Highs in the upper 40s to mid 50s. .THURSDAY NIGHT...Mostly cloudy. A 20 percent chance of rain in the evening. Lows in the mid 30s to lower 40s. .FRIDAY...Partly cloudy. Slight chance of snow in the morning, then slight chance of rain in the afternoon. Chance of precipitation 20 percent. Highs in the 50s to lower 60s. $$ IDZ008-182200- Lower Hells Canyon/Salmon River Region- Including the cities of Riggins and White Bird 1123 PM PDT Fri Apr 17 2026 .TODAY...Partly cloudy. Highs in the 50s to mid 60s. South winds to 15 mph. .TONIGHT...Mostly clear. Lows in the mid 30s to lower 40s. South winds to 15 mph. .SUNDAY...Partly cloudy. Highs in the 60s to upper 70s. .SUNDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 40s to lower 50s. .MONDAY...Partly cloudy. Highs in the lower 70s to mid 80s. .MONDAY NIGHT...Partly cloudy. Lows in the upper 40s to mid 50s. .TUESDAY...Mostly sunny. A 20 percent chance of rain in the afternoon. Highs in the lower 70s to mid 80s. .TUESDAY NIGHT...Rain showers likely and a slight chance of thunderstorms in the evening, then rain likely after midnight. Chance of precipitation 70 percent. Lows in the mid 40s to lower 50s. .WEDNESDAY...Rain likely. Chance of rain 90 percent. Cooler. Highs in the 50s to lower 60s. .WEDNESDAY NIGHT...Rain likely. Chance of rain 80 percent. Lows in the upper 30s to mid 40s. .THURSDAY...Rain likely in the morning, then a chance of rain in the afternoon. Chance of rain 70 percent. Highs in the 40s to upper 50s. .THURSDAY NIGHT...Mostly cloudy. A 20 percent chance of rain in the evening. Lows in the mid 30s to lower 40s. .FRIDAY...Mostly cloudy with a slight chance of rain. Slight chance of snow in the morning. Chance of precipitation 20 percent. Highs in the 50s to lower 60s. $$