Friday 10:40 a.m.
Chilly air is advancing into the Northeast this afternoon, and in many locations, tonight's chill will rival all-time records for the date. That's because the high pressure area marking the center of the chilly air mass will be right over the I95 corridor tomorrow morning, causing clear and calm conditions. Then, once the high moves to the east, a south to southwest flow of warmer air will become established. By Sunday afternoon, temperatures will be in the 60s throughout southern New England and 70 or higher farther south.
Strong thunderstorms from the middle of the country will head toward the western Great Lakes. The severe weather section at accuweather.com can be very helpful in explaining how these storms may affect you.
Tomorrow morning will be chilly in the Middle and North Atlantic states. Sam The Dog seems to like his early trip outside on cold mornings. I think it makes him appreciate the great usefulness of his fur coat.
It appears likely that many normal activities can go on through the day Monday, as long as the typical cautions for light to moderate snowfalls are observed. Tuesday will be an <strong>entirely different story</strong>. This map shows the GFS- predicted snowfall through 7 P.M. ET Monday:
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: