Area Forecast Product
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
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592 FPUS65 KTFX 132359 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 558 PM MDT Thu Aug 13 2026 MTZ301>314-316>318-141200- Central Montana- National Weather Service Great Falls MT 558 PM MDT Thu Aug 13 2026 .TONIGHT...Chance of rain showers and slight chance of thunderstorms in the evening, then rain showers likely after midnight. Lows 45 to 55...40 to 50 in the mountains. .FRIDAY...Cloudy. Chance of rain showers through the day. Slight chance of thunderstorms in the afternoon. Highs 60 to 70...50 to 60 in the mountains. .FRIDAY NIGHT...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 45 to 55...40 to 50 in the mountains. .SATURDAY...Partly cloudy. Chance of rain showers. Highs 70 to 75. .SUNDAY...Partly cloudy. Lows 45 to 50. Highs 75 to 85. .MONDAY...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 50 to 55. Highs 70 to 80. .TUESDAY...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 50 to 55. Highs 70 to 75. $$ MTZ315-319>330-141200- Southwest Montana- National Weather Service Great Falls MT 558 PM MDT Thu Aug 13 2026 ...FLASH FLOOD WATCH IN EFFECT UNTIL MIDNIGHT MDT TONIGHT FOR Big Belt, Bridger and Castle Mountains...Northwest Beaverhead County... ...FLOOD WATCH IN EFFECT UNTIL MIDNIGHT MDT TONIGHT FOR Elkhorn and Boulder Mountains... .TONIGHT...Patchy smoke through the night. Rain showers and chance of thunderstorms in the evening. Chance of rain showers after midnight. Some thunderstorms may produce heavy rainfall in the evening. Lows 45 to 50. .FRIDAY...Mostly cloudy. Patchy smoke through the day. Rain showers likely through the day. Chance of thunderstorms in the afternoon. Highs 65 to 70...55 to 65 in the mountains. .FRIDAY NIGHT...Mostly cloudy. Patchy smoke in the evening. Chance of showers and thunderstorms through the night. Lows 40 to 50. .SATURDAY...Mostly cloudy. Chance of showers and thunderstorms. Highs 65 to 75. .SUNDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 40 to 50. Highs 65 to 75. .MONDAY...Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Lows 45 to 50. Highs 65 to 75. .TUESDAY...Mostly cloudy. Chance of showers and thunderstorms. Lows 45 to 50. Highs 65 to 75. $$