What's this 40 degrees nonsense? A cold front slinked through the city last night, dropping the temperature down to seasonable levels. Not only is the temperature near normal, it looks like we will be really close to actual late-December weather tonight as a windy rain-sleet mix is expected to hit the city this evening. The weather is going to be much worse in the Catskills and Hudson Valley, where cooler air will produce a potentially dangerous mix of sleet, freezing rain and low wind chills.

A winter weather advisory is in effect for parts of the northeast, from 8 p.m. tonight to 6 a.m. Tuesday, and the NYC Department of Sanitation has issued a "snow alert."

The rain will continue into tomorrow but warmer weather will return as we'll be on the northern edge of the deadly storm that brought snow to El Paso and tornadoes across the South. Tuesday's high should reach the lower 50s, with Wednesday and Thursday being just a tad cooler. The new year looks to start out with temperatures much closer to normal, with highs in the mid 40s and lows in the lower 30s, as the upper level ridge that made all the warm weather possible finally breaks down.

You put on a good show, upper level ridge, leaving New York with an impressive array of weather records. Six daily high temperature records broken or tied, most number of days reaching 50 degrees, most days reaching 60 degrees, not a single temperature reading below freezing, and not a single cooler than normal day. We went an entire week, from last Monday morning until early this morning, without the temperature dropping below the average high for the day.

December's average temperature looks like it will wind up somewhere around 51 degrees. That is by far the warmest December ever recorded at the Central Park observing station, and what looks to be the most extreme departure from average of any month in the local climate record.