Hot, humid air is in place along the I-95 corridor today, but a cold front advancing southeastward from the eastern Great Lakes will ease the heat tomorrow. Friday and Saturday should be bright days with low to moderate humidity from Philadelphia on past Boston. However, another batch of very cool air aloft is likely to reach the Great Lakes Sunday and dominate the Northeast during at least the early part of next week. As the ground-level cold front associated with this feature moves along, it could kick off some strong thunderstorms. We'll follow up on that idea as we go through the next few days. Here is today's forecast video:
This map from 5 a.m. ET shows the cold front that is continuing toward this Northeast and Middle Atlantic states. Temperatures stayed in the 70s all night ahead of the front, but the air turned noticeably cooler after the front moved through.
The second storm we have been talking about will affect the Middle Atlantic region late Sunday and Sunday night. This GFS forecast map is for 7PM ET Sunday and shows precipitation amounts for the 6 hours up to that time.
This was our snow accumulation projection as of mid-morning. A storm that will develop in the Midwest on Sunday is likely to track to the Virginia-Maryland coastal area by Monday morning, then turn east. It will probably bring some to snow places that get mostly rain out out of the first storm.
Just a 1- or 2-degree temperature difference in the lowest 5,000 feet of the atmosphere can make the difference between heavy wet snow and heavy wet rain. Here is a draft of our snowfall map from mid-morning.
Much can still change with regard to the Saturday storm. This draft map from this morning shows how the accumulations may turn out. The AccuWeather.com staff will be watching this closely. I am happy to see many of our newer forecasters making major contributions.
n the Northeast corridor, this winter has not created much happiness among people who like snow. In New York City, this is the first year out of the last nine to have no 2-inch or greater snow event to this point in winter. Ralph Fato (WxNut27) sent out one of his wonderful charts to illustrate the widespread lateness of the first significant snowfall:
n the Northeast Corridor, this winter has not created much happiness among people who like snow. In New York City, this is the first year out of the last 9 to have no 2 inch or greater snow event to this point in winter. Ralph Fato (WxNut27) sent out one of his wonderful charts to illustrate the widespread lateness of the first significant snowfall: