Friday 10 a.m.
For the last couple of days, I have shown some maps that could be interpreted as predictions of at least some snow for the I95 corridor between D.C. and Boston. None of the possibilities were portrayals of imminent storms. In my first video today, I expanded the map size to take in all of North America and adjacent areas. You can watch the predicted changes in some of the polar regions.
In the video, I promised a closer look at the near-term Northeast and Great Lakes weather, and that is in the following video.
One map that caught my attention was the GFS 384-hour forecast for two days before Christmas. If you project its features out to Christmas Eve, there would be no White Christmas in the Northeast. Given the sensitive, and in some ways disturbing, content of that map, feel free to click to another part of accuweather.com right here: http://www.accuweather.com
before looking below.
A band of heavy rain and locally violent thunderstorms moved from the New York City area at 4 a.m. to just past Boston (distance: 188 miles) by 9:30 this morning. Note the stunning contrast between where it is pouring (dark red) and where it has dried out.
On the map, showers and thunderstorms were located along and ahead of the gray line that cuts through Pennsylvania and along/ahead of the blue line. Both should be off the East coast by Thursday. Drier air from the Upper Midwest should filter into the Northeast later in the week.
The large storm that drenched the Northeast during the weekend has drifted out to sea and somewhat drier air is coming in to replace it. However, another upper air trough extending from Wisconsin to Louisiana is supporting several pockets of showers and thunderstorms.
From northern West Virginia across most of Pennsylvania and western and central New York, there could be several inches of rain with flooded streets and streams.
...will move east to bring rain overnight from parts of Virginia to Southern New England. In the southern part of this area there can be some violent thunderstorms late today and tonight. The rain will depart tomorrow, but a large storm is likely to affect the Middle and North Atlantic states this weekend.
This activity map produced by the National Weather Service Storm Prediction Center overlays existing areas of thunderstorms on the map showing various risk levels.