First snow of the season tonight for many
No, this is not going to be a crippling winter storm. But the first true taste of winter is on its way tonight, as rain is likely to change over to snow in most locations.
A few days ago, most computer modeling data had little-to-no precipitation at all for the area. But that has changed over the past few days, as guidance has picked up on a few features which will increase the dynamics of the atmosphere tonight.
A potent mid-level disturbance is moving through the Great Lakes and into Western Upstate NY. This helps to strengthen the jet stream in New England over 130 knots, which helps to favor lifting in the atmosphere for precipitation. Additionally, this disturbance is triggering another shot of cold air advection, which is running into the warmer Atlantic Ocean, which also aids in the development of precipitation.