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.
This map shows a projection from last night's European model. It shows an huge temperature difference in a short distance across northern and central New England.
A number of you have submitted weather photos and graphics that we really enjoy. One person with a keen eye for how to visualize weather and climate events is Ralph Fato of Connecticut, who graciously allowed me to use this graphic about snowfall.
Snowfall amounts yesterday were low from Philadelphia to New York City. Accumulations increased toward the north and northeast.
This map shows the NAM's projection for this Friday night. The isobaric pattern suggests there is a southwesterly flow of mild air from the Gulf states to the Middle Atlantic region. Farther north, we see evidence of the frontal boundary that separates the mild air from chillier air.
A new area of snow now over southern Minnesota should expand southeastward to reach Chicago this afternoon, streak to Pittsburgh this evening, then reach the Philadelphia/New York City area late tonight or early tomorrow morning. This map shows a low pressure area over Missouri.
This map shows expected accumulations.