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Trevarton Reservoir Weather Forecast
| REST OF TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
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| Mostly Clear | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Lo: 61°FLo: 16°C | Hi: 90°FHi: 32°C | Lo: 60°FLo: 16°C | Hi: 88°FHi: 31°C | Lo: 59°FLo: 15°C | Hi: 93°FHi: 34°C Lo: 62°FLo: 17°C | Hi: 93°FHi: 34°C Lo: 62°FLo: 17°C | Hi: 94°FHi: 34°C Lo: 63°FLo: 17°C | Hi: 94°FHi: 34°C Lo: 63°FLo: 17°C | Hi: 93°FHi: 34°C | Lo: 63°FLo: 17°C | Hi: 90°FHi: 32°C |
| POP: 30% | POP: 40% | POP: 20% | POP: 30% | POP: 30% | POP: 70% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1248 AM MDT Tue Aug 18 2026 
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Trevarton Reservoir Forecast Discussion
Issued: 1207 AM MDT Tue Aug 18 2026
Key Messages
- Scattered showers and thunderstorms expected Tuesday and Wednesday. Isolated severe thunderstorm threat both afternoons and evenings.
- Above normal temperatures through the weekend. Drier Thursday and Friday, but some monsoonal moisture likely returns by the weekend.
Discussion
/Through Monday/... Issued at 125 PM MDT Mon Aug 17 2026
Drier zonal flow aloft is now over most of the state today... and unsurprisingly that has led to warmer temperatures across th...