Just as was the case with a storm two weeks ago, a snowstorm passed farther south than many computer models originally predicted. However, there seemed to be good agreement between the US Model (GFS), the Canadian (which did best with the storm two weeks ago) and the European that an area of West Virginia, Virginia, Maryland and Delaware would get the most.
The GFS ensemble mean (the average of multiple runs of the same model) suggests today's daytime temperatures will be the lowest ones of the week throughout the Northeast and Middle Atlantic states. However, the amount of warming later this week will be limited. Temperatures then will reach the 30s and 40s in New England and the 40s and 50s farther south from Pennsylvania to northern Virginia. A cold period is predicted for the first half of next week, and there are hints at possible snow, but then warmer air is predicted for the second half of next week right into the early days of April.
Here if today's video:
Heavy snow affected much of the Middle Atlantic region overnight. This map summarizes accumulation forecasts made toward the end of the storm.
In yesterday's report I made an analogy about predicting snow amounts using our 16 year old American Eskimo dog Sam as an example. I told Sam about it before taking this picture, but he just looked at me.
This map shows the pressure pattern around the big storm that some people in Boston and Providence are comparing with the Blizzard of '78.
In the worst-hit areas, plan for travel bans (for all non-emergency activities) because of impassable roads and extremely poor visibility. This map shows our projection for snow accumulations by early Wednesday. In many areas the heaviest snow should fall overnight and tomorrow morning.
In the worst-hit areas, plan for travel bans (for all non-emergency activities) because of impassable roads and extremely poor visibility. If you get stranded, rescue crews may not be able to reach you. Storms like this sometimes generate thunderstorms within the heaviest snow bands. The map shows predicted snow accumulations by early Wednesday.
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.