New Cold Regime Begins

Monday morning

Exceptionally warm air covered most of the East yesterday. Temperatures reached the 60s as far north as Plymouth, Mass. North of there, nothing doing in the warm air department. Boston stayed in the 30s, and farther north, a dangerous and damaging ice storm continued. Today, a cold front slowly heading toward the coast is preceded and followed by clouds and rain. From the Great Lakes to the Appalachians, the rain has been followed by snow showers. East of the mountains, the rain will end before it gets cold enough for snow. This video has more.

Although it will not be uniformly cold every day from tomorrow through the first days of 2014, it will be generally cold across the Great Lakes and Northeast. A weak disturbance embedded in the flow will move through the Middle Atlantic states tomorrow afternoon and evening, and this system can cause some snow showers. This NAM model map shows one idea of where there could be measurable precipitation between 1 p.m. and 7 p.m. ET tomorrow. Areas surrounding the shaded regions could also have some flurries.