Currently, at 500 hPa a longwave trough sits over much of the eastern United States. This trough is associated with a weak surface low centered over Chicago. The surface low will move east into the mid-Atlantic with a Canadian high to its north, the latter of which will bring the overnight low down to near freezing for Stony Brook. Some light mixed precipitation will then be possible early Sunday morning ahead of the low’s warm front, which after passing will bring a high of around 41. Ridging will then build in the area at 500 hPa starting Sunday but troughing in eastern Canada will bring additional frontal systems to the area in the near future.