Warm today, snow tomorrow.
Today: partly sunny, highs in the upper 50s—sounds good enough for sitting on the patio if the chairs weren't still covered with snow.
It may all melt on Wednesday, when the thunderstorms start.
There will be little or no accumulation when the rain turns to snow overnight Wednesday.
And the temperatures will return to winter on Thursday: in the 20s.
Check the National Weather Service's whole forecast for Brewster and environs here.