Monday 8 a.m.
With a high pressure area parked over the Northeast, and a blocking pattern aloft keeping storm tracks to the north and south of the region, a series of sunny days and clear nights should last through at least Friday. This video shows more.
The computer models we rely on for forecast guidance include many products and maps that are less used than the common ones that show the pressure pattern and areas of predicted rainfall. In fact, there are more than 80 such specialty map types available. For example, there are 12 maps related to soil moisture and temperature. One that I sometimes look at is the one set showing the running total of predicted rainfall for some length of time... perhaps a week or 10 days. Here are two such maps. One is the USGFS model and the other is the ECMWF (the European Model). The maps show predicted rainfall totals from today until next Sunday. Most of the Northeast stays totally dry.
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.