Temperatures soared early this morning from DC to Boston, while Chicago had its first January record low temperature of the 21st century. The cold blast will really be noticeable as it completes its march to the coast this afternoon and tonight.
The coldest weather in the Northeast will occur from later tonight through Wednesday, then it will start to leave. A weak low pressure area/warm front combination could cause some snow or ice Thursday night or Friday morning then, for the third weekend in a row, it will be milder than it will be during most of the week. This video has more.
Powerful northwest winds are sending bitterly cold air across the Great Lakes and toward the Northeast states.
Wet weather is coming toward the Northeast, and episodes of rain may be spread out over a two- to three-day period. Supporting this idea is this satellite/radar image from mid-morning Monday showing pockets and bands of rain affecting several areas.
On this map from 10 a.m. ET Thanksgiving Day, you can see the high pressure area that is causing dry and mild weather in the East and the cold front farther west.
During the late afternoon and early evening hours, the cold front of a knife will slice through the turkey and cause it to accumulate 1-2 inches on plates...
This satellite picture shows clouds over parts New York and Pennsylvania, as well as areas of low clouds, fog and snow cover from Michigan to Illinois. Most of the Northeast should have at least some sunshine through Thanksgiving Day.
As we go through the week, the flow aloft over the East will become southwesterly. This will promote a major warmup. This map shows the projected upper-air flow for Thanksgiving afternoon:
A major snowstorm will affect the area from Iowa to Michigan tonight and tomorrow. At first, snow can melt on streets, but as it continues and the temperature drops, the area impacted by slippery conditions will increase dramatically. This map shows expected accumulations: