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Those high clouds will thicken up by Thursday as a storm system moves along the east coast. While areas to the west of Groton may have another sunny day, Thursday could end up fairly cloudy for the eastern Finger Lakes and Central New York. There is even a small chance of a shower, but exactly how far west this system will impact is a bit unclear. Regardless, it will move out of our picture by Friday, leaving us to return to sunshine and 70s for the weekend.