Tuesday 9 a.m.
The upper-air current arriving in Pennsylvania this week originates over the Gulf of Mexico, so it is no surprise the main weather theme is warmer and more humid than typical for the season. However, computer models suggest that on Sunday, the flow reaching Pennsylvania will have originated in western Canada. Translation: warmer, then chillier. This video has more:
The details of the weather pattern are far less clear-cut than the overall trend. For example, there has been rain, some heavy, in a corridor extending from Pennsylvania to Virginia. Pittsburgh has been near the western edge; Philadelphia just east of the eastern edge. Farther south, violent thunderstorms developed in east-central North Carolina. Here is a map showing where precipitation was at 10 a.m. EDT.
The thin blue line is temperature. Notice how it is left of the black line near the bottom, meaning the ground level temperature is below freezing. Several thousand feet overhead, however, it is warmer than 32 degrees, so any snow falling through that layer melts.
Today is the National Education Association's Read Aloud Day. If you have young children or grandchildren, I hope you get the chance to read to them today, and on many other days. On today's video, I tried reading to you.
The storm moving from the Ohio Valley to the Middle Atlantic coast will cause snow and ice, Clearing should follow tomorrow, but another storm should bring snow and ice followed by rain from Maryland to Massachusetts.
Clearing should follow tomorrow, but another storm will cause snow and ice followed by rain from Maryland to Massachusetts late Tuesday into early Wednesday.
The wind will not roar like a lion in the Northeast on Sunday March 1. It certainly won't be lamblike. However, with more cold and snow in the forecast, it might be suitable for this group:
The surface analysis shows to low pressure area off the North Carolina coast, a large cold high pressure area in the northwest corner of the map, and a broad northeasterly flow of cold air between pressure centers. Cold will continue in this whole area through Saturday.