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Tunis Lake Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  |  |  |  |  | |  |  |  | | |
| Patchy Fog | Chance of Showers | Chance of Showers | Mostly Sunny | Partly Cloudy | Showers | Showers | Chance of T-Storm | Mostly Clear | Partly Sunny | Mostly Clear | Partly Sunny |
| Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 50°FLo: 10°C | Hi: 75°FHi: 24°C |
| POP: 50% | POP: 40% | POP: 60% | POP: 60% | POP: 80% |
POP = Probability of Precipitation.
Weather Outlook Updated: 935 PM EDT Wed Aug 19 2026 
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Tunis Lake Forecast Discussion
Issued: 744 PM EDT Wed Aug 19 2026
Key Messages
1) A frontal boundary moving through the area will produce isolated showers and thunderstorms into this evening. The front stalls in central PA with more rain expected tomorrow, mainly in NE PA.
2) High pressure builds in briefly Friday into Saturday morning before a large upper level low moves in for the late weekend into early next week with unsettled weather.
Discussion
... KEY MESSAGE 1...
A stalling frontal boundary is moving into the Finger Lakes regio...