This video shows how weather systems affecting the Northeast will move and change during the next week.
Today's heavy wet snowfall is hitting the area from northern Maryland to Southern New England with snow fall rates of 1-2 inches per hour this morning. This draft map shows our the expected snow amounts for today:
The next storm is likely take a track north of the current storm. This would place the heaviest snow along an axis that may run from Chicago to Cleveland to Buffalo and Albany, then to just north of Boston. The places getting the heaviest snow today, like Philadelphia and New York City, should have a quick changeover to heavy rain on Wednesday.
A third storm is lurking in the shadows for later next weekend. The storm achieved legendary status on social media when it first appeared on long range model projections late last week. Once the ingredients feeding the storm start materializing we will have a lot more to say about it.
Over the Ohio Valley, rain is starting nudge northward again, prodded by one of a series of upper air disturbances embedded in the flow. It appears the rain will advance across Pennsylvania overnight, reach the area from New York City to Boston tomorrow... then head out to sea.
Farther north, the area from Chicago to Boston looks most likely to have sunshine and dry weather. Cloud cover will vary during the weekend, and I focus on that aspect of the weekend forecast in this video.
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.