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Tunnel Reservoir Weather Forecast
| OVERNIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  |  |  |  | |  |  | |  |  | |
| Partly Cloudy | Partly Sunny | Patchy Fog | Chance of T-Storm | Chance of Showers | Partly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Chance of Showers | Showers | Chance of T-Storm |
| Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 79°FHi: 26°C |
| POP: 60% | POP: 50% | POP: 50% | POP: 70% | POP: 80% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1235 AM EDT Tue Aug 18 2026 
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Tunnel Reservoir Forecast Discussion
Issued: 132 AM EDT Tue Aug 18 2026
Key Messages
1) High pressure returns today with dry, sunny conditions.
2) A frontal system then moves through on Wednesday. Conditions will be mostly dry late in the week with widespread showers possible this weekend.
Discussion
... KEY MESSAGE 1...
With high pressure building into the region skies will be mostly sunny with fog quickly burning off. Prior to the next batch of rain early Wednesday, fog will be possible once again Tuesday night.
Despite blue skies and sunsh...