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Grampus Lake Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
 |  |  |  |  |  | |  | | | | |
| Isolated Showers | Partly Sunny | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Mostly Clear | Mostly Clear | Partly Cloudy | Chance of Showers | Chance of Showers |
| Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C Lo: 49°FLo: 9°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C Lo: 55°FLo: 13°C |
| POP: 20% | POP: 80% | POP: 80% | POP: 30% | POP: 30% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 830 PM EDT Tue Aug 25 2026 
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Issued: 202 AM EDT Wed Aug 26 2026
Key Messages
1) Scattered thunderstorms are expected to develop Thursday afternoon and evening across all of eastern New York and western New England. A few storms could be severe with the potential for damaging winds along with heavy downpours, which could result in isolated flash flooding.
2) Although a few additional showers or thunderstorms are possible on Friday, dry weather is expected for the weekend with seasonable temperatures.
Discussion
... KEY MESSAGE 1...
An upper level disturbance will ...