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Valley Fog Persists

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METEOROLOGIST MELISSA FREY’S FORECAST DISCUSSION:

Another foggy day for the valley, but the sun is shining bright across the rest of the state!

If you’re one of those stuck under the fog today, just head up to about 1,500 feet, or at to the coast and you’ll quickly find sunny skies.

A large ridge of high pressure has moved east over the Pacific Northwest and is the reason we’re going to stay dry. This ridge does several things to keep us dry and clear…First is blocks any other storms from moving in as the jet stream is clear up in northern Canada. It has also set up a temperature inversion, which means the air is colder at the surface, than in the higher elevations. This warm air overhead acts like a cap on the atmosphere, keeping things from mixing much.

Although they sky will be clear overhead, the valley will have to put up with fog for at least the next couple of nights. Overnight lows will fall to the upper 20s and low 30s through the weekend. We should start to see less fog and more on shore flow, which will bring sunshine for the afternoon and our temps up to the upper 40s  for Monday and Tuesday.

While the valley battles it out with the fog, the Coast and the Cascades are crystal clear and warm! Highs there will be in the mid 50s. The first shot of rain is Wednesday as a weak cold front moves in behind the ridge.

Enjoy this dry, sunny weather while it lasts!

Have a great Friday!
-Meteorologist Melissa Frey

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