A Cold But Calm Day Today, Winter Storm Arrives Tomorrow

Hello everyone!

Today will feature cold temps, increasing clouds, and dry conditions as high pressure slides south and east ahead of our next storm system. Current temps this morning range from 9 above in Portland to 2 below at several mountain locations. These temps will warm quite a bit today but still won’t get warm per se. Highs will range from 20 in the north to 30 in the south. Skies will begin mainly clear but will become overcast by this evening as low pressure approaches from the west.

I went over the dynamics of the storm in detail yesterday morning and little has changed since then. The basic overview is that snow will move into the area very late tonight and will become moderate to heavy by tomorrow morning. By mid morning tomorrow, warm air will be pushing onshore and causing the snow to mix with rain along the coast. Farther inland, moderate to heavy snow will continue until the system moves out mid afternoon tomorrow. My updated snow map is below.

Snowfall Forecast For Tomorrow's Event
Snowfall Forecast For Tomorrow’s Event

A period of freezing rain is also possible along the coast tomorrow. While accumulations won’t amount to much (>.1″), the additional coat of ice will make travel even more hazardous tomorrow during the morning commute.

No more significant storms are on the horizon this week but a shot of very cold air looks likely for the latter part of the week. By Thursday/Friday, high temps may struggle to reach 15 degrees even in the south.

-Jack

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