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Mashesky Reservoir Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY |
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| Chance of T-Storm | Mostly Clear | Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Partly Cloudy | Chance of Showers | Mostly Sunny | Mostly Clear | Mostly Clear | Mostly Sunny |
| Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 79°FHi: 26°C | Lo: 49°FLo: 9°C | Hi: 85°FHi: 29°C | Hi: 89°FHi: 32°C Lo: 55°FLo: 13°C | Hi: 89°FHi: 32°C Lo: 55°FLo: 13°C | Lo: 51°FLo: 11°C | Hi: 85°FHi: 29°C | Hi: 85°FHi: 29°C Lo: 55°FLo: 13°C | Hi: 85°FHi: 29°C Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C |
| POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 346 AM MDT Sun Aug 30 2026 
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Issued: 1234 AM MDT Sun Aug 30 2026
Key Messages
- A cold front will bring lower temperatures but continued chances for thunderstorms on Sunday. Some storms may produce severe wind gusts and brief heavy rainfall.
- A Lake Wind Advisory continues for Fort Peck Lake through 6 PM MDT Sunday.
- Temperatures will recover for the second half of the week with highs each day largely in the 80s.
Discussion
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WEATHER PATTERN OVERVIEW:
A cold front and upper trough will deliver a combination of lower temperatures, increasing west to northwest winds, ...