FPUS55 KMSO 211828 ZFPMSO Zone Forecast Product National Weather Service Missoula MT 1228 PM MDT Thu May 21 2026 MTZ001-221000- Kootenai/Cabinet Region- Including the cities of Libby and Eureka 1228 PM MDT Thu May 21 2026 .TONIGHT...Mostly cloudy. Lows in the upper 30s to mid 40s. .FRIDAY...Partly cloudy. Highs in the 70s. .FRIDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .SATURDAY...Partly cloudy. Highs in the mid 70s to lower 80s. .SATURDAY NIGHT...Mostly clear. Lows in the 40s. .SUNDAY...Mostly sunny. Highs in the 70s to lower 80s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MEMORIAL DAY...Partly cloudy with a 30 percent chance of rain. Highs in the 70s. .MONDAY NIGHT...Rain likely in the evening, then a chance of rain after midnight. Chance of rain 60 percent. Lows in the 40s. .TUESDAY...Mostly cloudy with a 40 percent chance of rain. Highs in the mid 60s to lower 70s. .TUESDAY NIGHT...Mostly cloudy with a 40 percent chance of rain. Lows in the 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 40 percent. Highs in the upper 60s to mid 70s. .WEDNESDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. A 30 percent chance of rain. Lows in the 40s. .THURSDAY...Partly cloudy with a 30 percent chance of rain. Highs in the upper 60s to mid 70s. $$ MTZ002-221000- West Glacier Region- Including the city of Swan Lake 1228 PM MDT Thu May 21 2026 .TONIGHT...Partly cloudy early in the evening then becoming mostly cloudy. Lows in the mid 30s to lower 40s. .FRIDAY...Partly cloudy. Highs in the 60s. .FRIDAY NIGHT...Mostly cloudy in the evening then clearing. Lows in the upper 30s to mid 40s. .SATURDAY...Partly cloudy. Highs in the mid 60s to lower 70s. Southwest winds to 15 mph. .SATURDAY NIGHT...Mostly clear. Lows in the 40s. Southwest winds to 15 mph. .SUNDAY...Mostly sunny. Highs in the mid 60s to lower 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MEMORIAL DAY...Partly cloudy. Highs in the mid 60s to lower 70s. .MONDAY NIGHT...Mostly cloudy with a 40 percent chance of rain. Lows in the 40s. .TUESDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the upper 50s to mid 60s. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the 40s. .WEDNESDAY...Mostly cloudy. A chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the upper 50s to mid 60s. .WEDNESDAY NIGHT...Mostly cloudy with a 30 percent chance of rain. Lows in the 40s. .THURSDAY...Mostly cloudy with a 30 percent chance of rain. Highs in the upper 50s to mid 60s. $$ MTZ003-221000- Flathead/Mission Valleys- Including the cities of Kalispell, Polson, and St. Ignatius 1228 PM MDT Thu May 21 2026 .TONIGHT...Partly cloudy then becoming mostly cloudy in the late evening and early morning then becoming 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...Partly cloudy. Highs in the 70s. .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. Lows in the mid 40s to lower 50s. .MEMORIAL DAY...Partly cloudy. Highs in the 70s. .MONDAY NIGHT...Mostly cloudy with a 40 percent chance of rain. Lows in the 40s. .TUESDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the 60s. .TUESDAY NIGHT...Mostly cloudy with a 40 percent chance of rain. Lows in the 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 40 percent. Highs in the 60s to lower 70s. .WEDNESDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. A 20 percent chance of rain. Lows in the 40s. .THURSDAY...Partly cloudy with a 20 percent chance of rain. Highs in the mid 60s to lower 70s. $$ MTZ004-221000- Lower Clark Fork Region- Including the cities of Noxon, Thompson Falls, and Superior 1228 PM MDT Thu May 21 2026 .TONIGHT...Partly cloudy then becoming mostly cloudy in the late evening and early morning then becoming partly cloudy. Lows in the mid 30s to lower 40s. .FRIDAY...Partly cloudy. Highs in the upper 60s to mid 70s. .FRIDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .SATURDAY...Partly cloudy. Highs in the 70s. .SATURDAY NIGHT...Mostly clear. Lows in the 40s. .SUNDAY...Mostly sunny. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MEMORIAL DAY...Partly cloudy with a 30 percent chance of rain. Highs in the 70s. .MONDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the 40s. .TUESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 60 percent. Highs in the upper 50s to mid 60s. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the upper 30s to mid 40s. .WEDNESDAY...Mostly cloudy with a 40 percent chance of rain. Highs in the 60s. .WEDNESDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. A 30 percent chance of rain. Lows in the 40s. .THURSDAY...Partly cloudy with a 30 percent chance of rain. Highs in the 60s to lower 70s. $$ MTZ005-221000- Missoula/Bitterroot Valleys- Including the cities of Hamilton and Darby 1228 PM MDT Thu May 21 2026 .TONIGHT...Mostly clear then becoming mostly cloudy in the late evening and early morning then becoming partly cloudy. Lows in the mid 30s to lower 40s. .FRIDAY...Partly cloudy. Highs near 70. .FRIDAY NIGHT...Partly cloudy. Lows near 40. .SATURDAY...Partly cloudy. Highs in the mid to upper 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the mid to upper 40s. .SUNDAY...Mostly sunny. Highs in the mid 70s to lower 80s. .SUNDAY NIGHT...Partly cloudy. Lows in the mid to upper 40s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs near 80. .MONDAY NIGHT...Mostly cloudy with a 40 percent chance of rain. Lows in the 40s. .TUESDAY...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 to upper 60s. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the lower to mid 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 to upper 60s. .WEDNESDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. A 30 percent chance of rain. Lows in the lower to mid 40s. .THURSDAY...Partly cloudy. Slight chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 40 percent. Highs near 70. $$ MTZ006-221000- Bitterroot/Sapphire Mountains- Including the city of Sula 1228 PM MDT Thu May 21 2026 .TONIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows in the 30s. .FRIDAY...Partly cloudy. Highs in the 60s. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .SATURDAY...Partly cloudy. Highs in the upper 60s to mid 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .SUNDAY...Mostly sunny. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of showers and thunderstorms in the afternoon. Highs in the 70s. .MONDAY NIGHT...Mostly cloudy with a chance of rain. Slight chance of thunderstorms in the evening. Chance of precipitation 40 percent. Lows in the upper 30s to mid 40s. .TUESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Highs in the upper 50s to mid 60s. .TUESDAY NIGHT...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 50 percent. Lows in the mid 30s to lower 40s. .WEDNESDAY...Mostly cloudy. A chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the upper 50s to mid 60s. .WEDNESDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. A 30 percent chance of rain. Lows in the mid 30s to lower 40s. .THURSDAY...Mostly cloudy. Slight chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 40 percent. Highs in the upper 50s to mid 60s. $$ MTZ007-221000- Butte/Blackfoot Region- Including the cities of Anaconda, Deer Lodge, and Drummond 1228 PM MDT Thu May 21 2026 .TONIGHT...Partly cloudy. Lows in the upper 20s to mid 30s. .FRIDAY...Partly cloudy. Highs in the upper 50s to mid 60s. .FRIDAY NIGHT...Mostly cloudy in the evening then clearing. Lows in the 30s to lower 40s. .SATURDAY...Partly cloudy. Highs in the mid 60s to lower 70s. West winds to 15 mph. .SATURDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. West winds to 15 mph. .SUNDAY...Mostly sunny. Highs in the 70s. .SUNDAY NIGHT...Mostly clear. Lows in the upper 30s to mid 40s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of showers and thunderstorms in the afternoon. Highs in the 70s. .MONDAY NIGHT...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 30 percent. Lows in the upper 30s to mid 40s. .TUESDAY...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 60s. .TUESDAY NIGHT...Rain showers likely and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 60 percent. 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 60s. .WEDNESDAY NIGHT...Partly cloudy with a 30 percent chance of rain. Lows in the mid 30s to lower 40s. .THURSDAY...Mostly cloudy. Slight chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 40 percent. Highs in the 60s. $$ MTZ043-221000- Potomac/Seeley Lake Region- Including the cities of East Missoula, Seeley Lake, and Clinton 1228 PM MDT Thu May 21 2026 .TONIGHT...Partly cloudy. Lows in the 30s. .FRIDAY...Partly cloudy. Highs in the 60s. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .SATURDAY...Mostly sunny. Highs in the mid 60s to lower 70s. .SATURDAY NIGHT...Mostly clear. Lows in the upper 30s to mid 40s. .SUNDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the 70s. .MONDAY NIGHT...Mostly cloudy with a 30 percent chance of rain. Lows in the 40s. .TUESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 60 percent. Highs in the 60s. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the upper 30s to mid 40s. .WEDNESDAY...Mostly cloudy. A chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the 60s. .WEDNESDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. A 30 percent chance of rain. Lows in the upper 30s to mid 40s. .THURSDAY...Mostly cloudy. Slight chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 30 percent. Highs in the 60s. $$ IDZ009-221000- Western Lemhi County- Including the city of Shoup 1228 PM MDT Thu May 21 2026 .TONIGHT...Partly cloudy in the evening then becoming mostly 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 mid 40s to lower 50s. Southwest winds to 15 mph. .SUNDAY...Mostly sunny. Highs in the 70s to lower 80s. .SUNDAY NIGHT...Mostly clear. Lows in the mid 40s to lower 50s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the 70s to lower 80s. .MONDAY NIGHT...Mostly cloudy with a 30 percent chance of rain. Lows in the 40s. .TUESDAY...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 60s. .TUESDAY NIGHT...Mostly cloudy. 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 upper 30s to mid 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 60s. .WEDNESDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. A 30 percent chance of rain. Lows in the upper 30s to mid 40s. .THURSDAY...Mostly cloudy. Slight chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 40 percent. Highs in the 60s to lower 70s. $$ IDZ010-221000- Eastern Lemhi County- Including the cities of Salmon and Leadore 1228 PM MDT Thu May 21 2026 .TONIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows in the 30s. .FRIDAY...Partly cloudy. Highs in the 60s to lower 70s. .FRIDAY NIGHT...Mostly cloudy in the evening then clearing. Lows in the mid 30s to lower 40s. .SATURDAY...Mostly sunny. Highs in the 70s. Southwest winds to 15 mph. .SATURDAY NIGHT...Partly cloudy. Lows in the 40s. Southwest winds to 15 mph. .SUNDAY...Partly cloudy. Highs in the 70s to lower 80s. .SUNDAY NIGHT...Mostly clear. Lows in the 40s to lower 50s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of showers and thunderstorms in the afternoon. Highs in the mid 70s to lower 80s. .MONDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms in the evening, then partly cloudy with a slight chance of rain after midnight. Chance of precipitation 20 percent. Lows in the 40s. .TUESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Highs in the 60s. .TUESDAY NIGHT...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 50 percent. Lows in the upper 30s to mid 40s. .WEDNESDAY...Mostly cloudy. A chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the 60s. .WEDNESDAY NIGHT...Partly cloudy with a 20 percent chance of rain. Lows in the upper 30s to mid 40s. .THURSDAY...Partly cloudy. Slight chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 40 percent. Highs in the mid 60s to lower 70s. $$ IDZ005-221000- Northern Clearwater Mountains- Including the cities of Pierce and Elk River 1128 AM PDT Thu May 21 2026 .TONIGHT...Partly cloudy early in the evening then becoming mostly cloudy. Lows in the mid 30s to lower 40s. .FRIDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .FRIDAY NIGHT...Mostly clear. Lows in the mid 30s to lower 40s. .SATURDAY...Mostly sunny. Highs in the mid 70s to lower 80s. .SATURDAY NIGHT...Mostly clear. Lows in the 40s. .SUNDAY...Mostly sunny. Highs in the 70s to lower 80s. .SUNDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .MEMORIAL DAY...Partly cloudy with a 20 percent chance of rain. Highs in the 70s. .MONDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the mid 30s to lower 40s. .TUESDAY...A chance of rain in the morning, then rain likely in the afternoon. Chance of rain 60 percent. Cooler. Highs in the mid 50s to lower 60s. .TUESDAY NIGHT...Mostly cloudy with a 40 percent chance of rain. Lows in the mid 30s to lower 40s. .WEDNESDAY...Mostly cloudy with a 30 percent chance of rain. Highs in the 60s. .WEDNESDAY NIGHT...Partly cloudy with a 20 percent chance of rain. Lows in the mid 30s to lower 40s. .THURSDAY...Partly cloudy with a 30 percent chance of rain. Highs in the 60s. $$ IDZ006-221000- Southern Clearwater Mountains- Including the cities of Powell, Elk City, and Dixie 1128 AM PDT Thu May 21 2026 .TONIGHT...Partly cloudy early in the evening then becoming mostly cloudy. Lows 33 to 48. .FRIDAY...Mostly sunny. Highs 60 to 73. .FRIDAY NIGHT...Mostly clear. Lows 35 to 50. .SATURDAY...Partly cloudy. Highs 66 to 81. .SATURDAY NIGHT...Partly cloudy. Lows 38 to 53. .SUNDAY...Mostly sunny. Highs 65 to 80. .SUNDAY NIGHT...Partly cloudy. Lows 37 to 52. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs 69 to 82. .MONDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the 30s to mid 40s. .TUESDAY...Rain likely in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Cooler. Highs in the 50s to lower 60s. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows 32 to 45. .WEDNESDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the mid 50s to upper 60s. .WEDNESDAY NIGHT...Partly cloudy with a 30 percent chance of rain. Lows 35 to 48. .THURSDAY...Partly cloudy. Slight chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 40 percent. Highs in the upper 50s to lower 70s. $$ IDZ007-221000- Orofino/Grangeville Region- Including the city of Kooskia 1128 AM PDT Thu May 21 2026 .TONIGHT...Partly cloudy early in the evening then becoming mostly cloudy. Lows in the 40s. .FRIDAY...Mostly sunny. Highs in the 60s to upper 70s. .FRIDAY NIGHT...Mostly clear. Lows in the 40s to lower 50s. .SATURDAY...Mostly sunny. Highs in the 70s to mid 80s. .SATURDAY NIGHT...Mostly clear. 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 mid 40s to lower 50s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the mid 70s to lower 80s. .MONDAY 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 40s. .TUESDAY...Rain likely. Chance of rain 70 percent. Cooler. Highs in the mid 50s to lower 60s. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the 40s. .WEDNESDAY...Mostly cloudy with a 40 percent chance of rain. Highs in the 60s. .WEDNESDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. A 30 percent chance of rain. Lows in the 40s to lower 50s. .THURSDAY...Partly cloudy. Slight chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 30 percent. Highs in the 60s to lower 70s. $$ IDZ008-221000- Lower Hells Canyon/Salmon River Region- Including the cities of Riggins and White Bird 1128 AM PDT Thu May 21 2026 .TONIGHT...Partly cloudy early in the evening then becoming mostly cloudy. Lows in the mid 40s to lower 50s. North winds to 15 mph in the evening. .FRIDAY...Mostly sunny. Highs in the upper 60s to lower 80s. North winds to 15 mph. .FRIDAY NIGHT...Mostly clear. Lows in the mid 40s to lower 50s. Southeast winds to 15 mph. .SATURDAY...Mostly sunny. Highs 74 to 88. .SATURDAY NIGHT...Partly cloudy. Lows in the 50s. .SUNDAY...Mostly sunny. Highs 75 to 89. .SUNDAY NIGHT...Mostly clear. Lows in the 50s. .MEMORIAL DAY...Mostly sunny. Highs 73 to 86. .MONDAY NIGHT...A chance of rain in the evening, then rain likely after midnight. Chance of rain 60 percent. Lows in the mid 40s to lower 50s. .TUESDAY...Rain likely. Chance of rain 70 percent. Cooler. Highs in the 50s to mid 60s. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the 40s. .WEDNESDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the upper 50s to lower 70s. .WEDNESDAY NIGHT...Mostly cloudy with a 30 percent chance of rain in the evening, then partly cloudy after midnight. Lows in the 40s to lower 50s. .THURSDAY...Partly cloudy with a 30 percent chance of rain. Highs in the lower 60s to mid 70s. $$