Tuesday 11 a.m.
Here is a video I prepared at 6:30 this morning. Since then, the worst rains have shifted toward coastal New Jersey. Earlier, Philadelphia's western suburbs got 2-4 inches of rain, turning roads into rivers, streets into streams and parking lots into ponds.
With more than 2 inches of rain in Philadelphia, the rainfall total since June 1 is now above 27 inches, which is about three times the average rainfall for the same period. So far this year, there has been more than 40 inches of rain, which is close to the average total for the entire year. There has also been more rain so far this year than all of last year.
This map shows the pressure pattern early this morning. The most intense rainfall was associated with the low pressure area over Delaware. The system also spawned damaging thunderstorm winds as it tracked from Delaware across southern New Jersey.
At first, the heaviest rain was in Philadelphia's western suburbs. This radar map shows the boundary between where it was pouring and where it was doing nothing.
As the low pressure area moved northeast, the heavy rain swept eastward across southern New Jersey.
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:
This map shows two cold fronts in the northeast quarter of the nation; 9 a.m. ET temperature are plotted. The isobars are closest together over the central and western Great Lakes, and this is where the strongest winds were occurring.
This map shows how large an area is directly affected by precipitation on Tuesday morning. The low pressure center was in Kansas early today but will move all the way to Hudson Bay by Thursday while sending a cold front eastward on its south side.