ECMWF precip type map valid for Saturday afternoon. (

First Accumulating Snow of the Season Becoming Likely for the East Coast

Good afternoon! In the world of weather, there has been a lot of model mayhem regarding a big shift in the data further northwest with a coastal storm, which is leading to the idea of accumulating snow across much of the Eastern US on Saturday. We believe that these ideas have a lot of merit, and in this article we are going to explain why, as well as overview some of our expectations.

In the macro sense, it’s not a complicated setup. We have a large ridge in the West, and a corresponding deep trough in the East, we have disturbances sliding down the ridge and entering the trough, and we also have a relatively stalled frontal boundary off the coast, providing a strong temperature gradient for a storm to ride, while also providing enough ridging in the Atlantic to keep the storm from sliding out to sea.

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