Brief 3:40 AM post with your frigid wind chills and a look at the uncertain potential system for next Sunday/Monday:

- You can see the frigid 3 AM wind chills in the 1st image. - After very mild air late this week, peaking on Friday, somewhat colder air briefly returns to the northeast early next week. This will bring a chance for some snow in New England/NY (likely north of Long Island) with a potential system for next Sunday/Monday. The 2nd to 5th images are from the GFS, Euro, and Euro ensembles. Stay tuned for changes and more updates, of course.