FPUS55 KMSO 190623 ZFPMSO Zone Forecast Product National Weather Service Missoula MT 1223 AM MDT Tue May 19 2026 MTZ001-192200- Kootenai/Cabinet Region- Including the cities of Libby and Eureka 1223 AM MDT Tue May 19 2026 .TODAY...Mostly cloudy. Areas of frost early in the morning. Chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the 60s to lower 70s. .TONIGHT...Mostly cloudy. A 40 percent chance of rain in the evening. Lows in the mid 30s to lower 40s. .WEDNESDAY...Mostly cloudy. A chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the mid 60s to lower 70s. .WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers and a slight chance of thunderstorms in the evening, then mostly clear after midnight. Chance of precipitation 40 percent. Lows in the mid 30s to lower 40s. .THURSDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .THURSDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .FRIDAY...Mostly sunny. Highs in the 70s. .FRIDAY NIGHT...Partly cloudy. Lows in the 40s. .SATURDAY...Partly cloudy. A 20 percent chance of showers and thunderstorms in the afternoon. Highs in the 70s to lower 80s. .SATURDAY NIGHT...Partly cloudy. Lows in the 40s. .SUNDAY...Partly cloudy. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s to lower 50s. .MEMORIAL DAY...Partly cloudy. Highs in the upper 60s to mid 70s. $$ MTZ002-192200- West Glacier Region- Including the city of Swan Lake 1223 AM MDT Tue May 19 2026 .TODAY...Mostly cloudy. Areas of frost early in the morning. Slight chance of rain late in the morning. Chance of showers and thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the 50s. Southwest winds to 15 mph. .TONIGHT...Mostly cloudy with a 40 percent chance of rain. Lows in the mid 30s to lower 40s. Southwest winds to 15 mph. .WEDNESDAY...A chance of rain and snow in the morning, then rain showers likely and a chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. No snow accumulation. Highs in the 50s. .WEDNESDAY NIGHT...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the evening, then slight chance of rain and snow after midnight. Chance of precipitation 50 percent. Lows in the 30s. .THURSDAY...Partly cloudy. Highs in the upper 50s to mid 60s. .THURSDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .FRIDAY...Mostly sunny. Highs in the 60s. .FRIDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .SATURDAY...Partly cloudy. A 20 percent chance of showers and thunderstorms in the afternoon. Highs in the 60s. .SATURDAY NIGHT...Partly cloudy. Lows in the 40s. .SUNDAY...Partly cloudy. Highs in the 60s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the upper 50s to mid 60s. $$ MTZ003-192200- Flathead/Mission Valleys- Including the cities of Kalispell, Polson, and St. Ignatius 1223 AM MDT Tue May 19 2026 ...FROST ADVISORY IN EFFECT UNTIL 9 AM MDT THIS MORNING... .TODAY...Mostly cloudy. Areas of frost early in the morning. A 50 percent chance of showers and thunderstorms in the afternoon. Highs in the upper 50s to mid 60s. Southwest winds to 15 mph. .TONIGHT...Mostly cloudy. A 30 percent chance of rain in the evening. Lows in the mid 30s to lower 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 showers likely and a slight chance of thunderstorms in the evening. Chanceof precipitation 60 percent. Lows in the mid 30s to lower 40s. .THURSDAY...Mostly sunny. Highs in the 60s. .THURSDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .FRIDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .FRIDAY NIGHT...Partly cloudy. Lows in the 40s. .SATURDAY...Mostly sunny. A 20 percent chance of showers and thunderstorms in the afternoon. Highs in the 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the 40s. .SUNDAY...Partly cloudy. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows in the 40s to lower 50s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the mid 60s to lower 70s. $$ MTZ004-192200- Lower Clark Fork Region- Including the cities of Noxon, Thompson Falls, and Superior 1223 AM MDT Tue May 19 2026 ...FROST ADVISORY IN EFFECT UNTIL 9 AM MDT THIS MORNING... .TODAY...Mostly cloudy. Areas of frost early in the morning. A 20 percent chance of showers and thunderstorms in the afternoon. Highs in the upper 50s to mid 60s. Southwest winds to 15 mph. .TONIGHT...Mostly cloudy. A 20 percent chance of rain in the evening. Lows in the mid 30s to lower 40s. West winds to 15 mph. .WEDNESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Highs in the upper 50s to mid 60s. .WEDNESDAY NIGHT...Rain showers likely and a slight chance of thunderstorms in the evening, then partly cloudy with a chance of rain after midnight. Chance of precipitation 80 percent. Lows in the mid 30s to lower 40s. .THURSDAY...Partly cloudy. Highs in the mid 60s to lower 70s. .THURSDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .FRIDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .FRIDAY NIGHT...Partly cloudy. Lows in the 40s. .SATURDAY...Mostly sunny. Highs in the 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the 40s. .SUNDAY...Mostly sunny. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the mid 60s to lower 70s. $$ MTZ005-192200- Missoula/Bitterroot Valleys- Including the cities of Hamilton and Darby 1223 AM MDT Tue May 19 2026 ...FROST ADVISORY IN EFFECT UNTIL 9 AM MDT THIS MORNING... .TODAY...Mostly cloudy. Widespread frost early in the morning. A 20 percent chance of showers and thunderstorms in the afternoon. Highs in the lower to mid 60s. West winds to 15 mph in the afternoon. .TONIGHT...Mostly cloudy. A 20 percent chance of rain in the evening. Lows in the mid to upper 30s. West winds to 15 mph. .WEDNESDAY...Rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Highs in the lower to mid 60s. .WEDNESDAY NIGHT...Rain showers likely and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 80 percent. Lows in the mid 30s to lower 40s. .THURSDAY...Mostly cloudy in the morning then clearing. Highs in the mid to upper 60s. .THURSDAY NIGHT...Partly cloudy. Lows near 40. .FRIDAY...Partly cloudy. Highs in the lower to mid 70s. .FRIDAY NIGHT...Partly cloudy. Lows in the lower to mid 40s. .SATURDAY...Mostly sunny. Highs in the mid to upper 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the lower to mid 40s. .SUNDAY...Mostly sunny. Highs in the mid to upper 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the lower to mid 70s. $$ MTZ006-192200- Bitterroot/Sapphire Mountains- Including the city of Sula 1223 AM MDT Tue May 19 2026 ...FROST ADVISORY IN EFFECT UNTIL 9 AM MDT THIS MORNING... .TODAY...Partly cloudy. Widespread frost early in the morning. Slight chance of rain early in the afternoon. Slight chance of rain and snow late in the afternoon. Chance of precipitation 20 percent. Highs in the 50s to lower 60s. .TONIGHT...Mostly cloudy. A 20 percent chance of rain in the evening. Lows in the 30s. .WEDNESDAY...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the 50s to lower 60s. .WEDNESDAY NIGHT...Mostly cloudy with a chance of snow. Chance of rain showers and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 50 percent. Lows in the 30s. Northwest winds to 15 mph. .THURSDAY...Partly cloudy. Highs in the mid 50s to lower 60s. .THURSDAY NIGHT...Partly cloudy. Lows in the 30s to lower 40s. .FRIDAY...Partly cloudy. Highs in the 60s. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .SATURDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .SUNDAY...Partly cloudy. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .MEMORIAL DAY...Partly cloudy. Highs in the upper 60s to mid 70s. $$ MTZ007-192200- Butte/Blackfoot Region- Including the cities of Anaconda, Deer Lodge, and Drummond 1223 AM MDT Tue May 19 2026 .TODAY...Partly cloudy. Widespread frost early in the morning. Slight chance of rain and snow early in the afternoon. Slight chance of rain late in the afternoon. Chance of precipitation 20 percent. Highs in the mid 50s to lower 60s. .TONIGHT...Mostly cloudy. A 20 percent chance of rain in the evening. Lows in the upper 20s to mid 30s. West winds to 15 mph. .WEDNESDAY...Rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Highs in the 50s to lower 60s. West winds to 15 mph. .WEDNESDAY NIGHT...Rain showers likely and a slight chance of thunderstorms in the evening, then rain and snow likely after midnight. Chance of precipitation 90 percent. Lows in the 30s. North winds to 15 mph. .THURSDAY...Mostly cloudy. A 40 percent chance of rain and snow in the morning. Highs in the mid 50s to lower 60s. .THURSDAY NIGHT...Partly cloudy. Lows in the 30s. .FRIDAY...Partly cloudy. Highs in the 60s. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .SATURDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .SUNDAY...Partly cloudy. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .MEMORIAL DAY...Partly cloudy. Highs in the upper 60s to mid 70s. $$ MTZ043-192200- Potomac/Seeley Lake Region- Including the cities of East Missoula, Seeley Lake, and Clinton 1223 AM MDT Tue May 19 2026 .TODAY...Mostly cloudy. Widespread frost early in the morning. Chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 40 percent. Highs in the mid 50s to lower 60s. .TONIGHT...Mostly cloudy. A 20 percent chance of rain in the evening. Lows in the 30s. West winds to 15 mph. .WEDNESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Highs in the mid 50s to lower 60s. .WEDNESDAY NIGHT...Rain showers likely and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 80 percent. Lows in the 30s. .THURSDAY...Partly cloudy. Highs in the upper 50s to mid 60s. .THURSDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .FRIDAY...Partly cloudy. Highs in the 60s. .FRIDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .SATURDAY...Mostly sunny. Highs in the mid 60s to lower 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the 40s. .SUNDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of showers and thunderstorms in the afternoon. Highs in the mid 60s to lower 70s. $$ IDZ009-192200- Western Lemhi County- Including the city of Shoup 1223 AM MDT Tue May 19 2026 .TODAY...Partly cloudy. Highs in the upper 50s to mid 60s. .TONIGHT...Mostly cloudy with a 20 percent chance of rain in the evening, then partly cloudy after midnight. Lows in the mid 30s to lower 40s. .WEDNESDAY...Mostly cloudy. A 20 percent chance of rain in the afternoon. Highs in the upper 50s to mid 60s. .WEDNESDAY NIGHT...Partly cloudy with a 30 percent chance of rain. Lows in the upper 30s to mid 40s. Northwest winds to 15 mph. .THURSDAY...Partly cloudy. A 20 percent chance of rain and snow in the morning. Highs in the 60s. .THURSDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .FRIDAY...Mostly sunny. Highs in the mid 60s to lower 70s. .FRIDAY NIGHT...Partly cloudy. Lows in the 40s. .SATURDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the 40s. .SUNDAY...Partly cloudy. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s to lower 50s. .MEMORIAL DAY...Partly cloudy. Highs in the upper 60s to mid 70s. $$ IDZ010-192200- Eastern Lemhi County- Including the cities of Salmon and Leadore 1223 AM MDT Tue May 19 2026 ...FROST ADVISORY IN EFFECT UNTIL 9 AM MDT THIS MORNING... .TODAY...Partly cloudy. Widespread frost early in the morning. A 20 percent chance of rain late in the afternoon. Highs in the mid 50s to lower 60s. .TONIGHT...Mostly cloudy. A 20 percent chance of rain in the evening. Lows in the 30s. .WEDNESDAY...Mostly cloudy. A chance of rain and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the upper 50s to mid 60s. Northwest winds to 15 mph. .WEDNESDAY NIGHT...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the evening, then a chance of rain and a slight chance of snow after midnight. Chance of precipitation 50 percent. Lows in the 30s to lower 40s. Northwest winds to 15 mph. .THURSDAY...Partly cloudy. A 30 percent chance of rain and snow in the morning. Highs in the upper 50s to mid 60s. .THURSDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .FRIDAY...Partly cloudy. Highs in the mid 60s to lower 70s. .FRIDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .SATURDAY...Mostly sunny. Highs in the 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .SUNDAY...Partly cloudy. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MEMORIAL DAY...Partly cloudy. Highs in the 70s. $$ IDZ005-192200- Northern Clearwater Mountains- Including the cities of Pierce and Elk River 1123 PM PDT Mon May 18 2026 ...FROST ADVISORY IN EFFECT UNTIL 8 AM PDT TUESDAY... .TODAY...Partly cloudy. Areas of frost and patchy fog early in the morning. Highs in the 60s. .TONIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows in the 30s to lower 40s. .WEDNESDAY...Mostly cloudy. A 20 percent chance of rain in the afternoon. Highs in the 60s. .WEDNESDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. A 30 percent chance of rain. Lows in the 30s. .THURSDAY...Mostly sunny. Highs in the mid 60s to lower 70s. .THURSDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .FRIDAY...Mostly sunny. Highs in the 70s. .FRIDAY NIGHT...Mostly clear. Lows in the upper 30s to mid 40s. .SATURDAY...Mostly sunny. Highs in the 70s. .SATURDAY NIGHT...Partly cloudy. Lowsin the upper 30s to mid 40s. .SUNDAY...Mostly sunny. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 30s to mid 40s. .MEMORIAL DAY...Partly cloudy. Highs in the 60s to lower 70s. $$ IDZ006-192200- Southern Clearwater Mountains- Including the cities of Powell, Elk City, and Dixie 1123 PM PDT Mon May 18 2026 ...FROST ADVISORY IN EFFECT UNTIL 8 AM PDT TUESDAY... .TODAY...Partly cloudy. Widespread frost and areas of fog early in the morning. Areas of frost late in the morning. A 20 percent chance of rain in the afternoon. Highs 52 to 66. .TONIGHT...Mostly cloudy. A 20 percent chance of rain in the evening. Lows 31 to 46. .WEDNESDAY...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 30 percent. Highs 53 to 66. Northwest winds to 15 mph. .WEDNESDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. A 40 percent chance of rain. Lows 31 to 46. Northwest winds to 15 mph. .THURSDAY...Mostly sunny. Highs 56 to 70. .THURSDAY NIGHT...Partly cloudy. Lows 33 to 48. .FRIDAY...Mostly sunny. Highs 61 to 76. .FRIDAY NIGHT...Mostly clear. Lows 35 to 50. .SATURDAY...Mostly sunny. Highs 67 to 80. .SATURDAY NIGHT...Partly cloudy. Lows 36 to 51. .SUNDAY...Mostly sunny. Highs 67 to 81. .SUNDAY NIGHT...Partly cloudy. Lows 36 to 51. .MEMORIAL DAY...Partly cloudy. Highs in the 60s to lower 70s. $$ IDZ007-192200- Orofino/Grangeville Region- Including the city of Kooskia 1123 PM PDT Mon May 18 2026 ...FROST ADVISORY IN EFFECT UNTIL 9 AM PDT TUESDAY... .TODAY...Partly cloudy. A 20 percent chance of showers and thunderstorms late in the afternoon. Highs in the 60s to lower 70s. .TONIGHT...Partly cloudy. A 20 percent chance of rain in the evening. Lows in the 40s. .WEDNESDAY...Mostly cloudy. A 20 percent chance of rain in the afternoon. Highs in the 60s to lower 70s. .WEDNESDAY NIGHT...Partly cloudy with a 20 percent chance of rain. Lows in the upper 30s to mid 40s. .THURSDAY...Mostly sunny. Highs in the 60s to mid 70s. .THURSDAY NIGHT...Partly cloudy. Lows in the 40s. .FRIDAY...Mostly sunny. Highs in the 70s. .FRIDAY NIGHT...Mostly clear. Lows in the 40s to lower 50s. .SATURDAY...Mostly sunny. Highs in the 70s to lower 80s. .SATURDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower 50s. .SUNDAY...Mostly sunny. Highs in the 70s to lower 80s. .SUNDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid 40s to lower 50s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the mid 60s to lower 70s. $$ IDZ008-192200- Lower Hells Canyon/Salmon River Region- Including the cities of Riggins and White Bird 1123 PM PDT Mon May 18 2026 .TODAY...Partly cloudy. A 20 percent chance of rain late in the afternoon. Highs in the 60s to lower 70s. .TONIGHT...Partly cloudy. A 20 percent chance of rain in the evening. Lows in the 40s. .WEDNESDAY...Mostly cloudy. Highs in the lower 60s to mid 70s. North winds to 15 mph. .WEDNESDAY NIGHT...Partly cloudy. Lows in the 40s. Northeast winds 15 to 20 mph. .THURSDAY...Mostly sunny. Highs 64 to 77. North winds to 15 mph. .THURSDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower 50s. .FRIDAY...Mostly sunny. Highs 69 to 82. .FRIDAY NIGHT...Mostly clear. Lows in the upper 40s to mid 50s. .SATURDAY...Mostly sunny. Highs in the 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the upper 40s to mid 50s. .SUNDAY...Mostly sunny. Highs in the mid 70s to lower 80s. .SUNDAY NIGHT...Partly cloudy. Lows in the upper 40s to mid 50s. .MEMORIAL DAY...Partly cloudy. Highs in the upper 60s to mid 70s. $$