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| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | WEDNESDAY | THURSDAY |
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| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Clear |
| Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 59°FHi: 15°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Hi: 71°FHi: 22°C Lo: 44°FLo: 7°C | Hi: 71°FHi: 22°C Lo: 44°FLo: 7°C | Hi: 71°FHi: 22°C Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C Lo: 45°FLo: 7°C | Hi: 75°FHi: 24°C Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C Lo: 49°FLo: 9°C |
| POP: 90% | POP: 70% | POP: 90% | POP: 70% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 326 AM MDT Fri Sep 18 2026 
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Issued: 515 AM MDT Fri Sep 18 2026
Key Messages
- Thunderstorms, a few of which look to be on the stronger side, develop through the day today, mostly across Central and Southwest Montana.
- Areas of precipitation continue into Saturday, resulting in increased concerns for localized flooding.
- A drier and warmer stretch looks to ensue late weekend through much of next week.
Discussion
... /Issued 324 AM MDT Fri Sep 18 2026/- Meteorological Overview:
A somewhat elongated upper level low across the Pacific NW and vicinity will slowly shift e...