Cold and Snow is Coming to the Pacific Northwest. The Story in My New Podcast

A late February cold snap with snow is coming to the region, and my new podcast provides the details.

The instigator of the cold fun is an upper-level trough (area of low pressure) that will move southward along the eastern side of a huge northeast Pacific ridge of high pressure.

Upper-level flow (500hPa) Late Saturday

Initially, western Washington will be too warm for snow, but the mountains will enjoy bountiful flakes (see snowfall total through 10 PM Sunday)

But as I describe in the podcast, on Monday, western Washington has a snowy chance, as a Puget Sound convergence zone forms south of Everett (see snow total through 4 PM Monday). Some snow may also occur on the northeast side of the Olympics (e.g, around Sequim) as northeasterly flow moving out of the Fraser River valley is forced to ascend by the terrain.