Sunday 5 PM
This is a video made late this afternoon showing where Sandy should go and what impacts to expect. The storm is still well out at sea, but it was supposed to be there according to previous forecasts. However, the various computer models have insisted the storm is about to hook to the left and head straight for the coast. The video shows where the storm should be at various times during the next couple of days. Keep in mind that dangerous wind and rain conditions will arrive long before the center reaches or passes you. In fact, the weather will slowly improve right after the center passes, but the damage will have been done. I'll write to you again tomorrow morning.
A deck of clouds about a half-mile overhead spread westward from the Atlantic to much of the I95 corridor from DC to Boston early this morning. These cloud decks can be a forecaster's nightmare in the spring because ...
The map below the video is one of the GFS solutions for where the southeast storm will be early Saturday. The precipitation is predicted to be farther north than suggested by other models.
It is freezing cold in the Northeast this morning, but this map shows that much more mellow mildness has reached the Plains.
Extensive precipitation straddles both sides of the cold front that was moving through central New York and central Pennsylvania as of mid morning. This radar shows the distribution of rain and snow; some temperatures are added.
The cold front approaching the East shows up quite well in this pressure analysis. Several temperatures are plotted to give you a sense for how much the temperature changes behind the cold front. At Chicago, it went from 60 at 4 a.m. to 39 at 5:19, a 21-degree drop in little more than an hour.
Temperatures on Sunday and Monday will range from the 60s in parts of New England to near 80 in Maryland and Virginia. However, a strong cold front will then trigger and perhaps a few thunderstorms as it ushers in air that will be 30-40 degrees colder than it will be ahead of the cold front.