Saturday, January 17, 2009

Why It's January but looks like July

It has been my observation for many years that winter here in the Pacific Northwest includes a period of time in February when the clouds part and the skys clear and the sun comes out. From inside, looking out, one is tempted to grab the shorts and sandals and head for the beach. It's not uncommon for it to be in the fifties during this period, so it actually is warm enough for those of us long enured to the Northwest definiition of "warm weather" to consider swimming or at least a beach fire and hot dogs.

This year, January has not produced the expected endless stretch of clouds and rain - and snow in the mountains - but has instead made a futile attempt to imitate the February weather. The difference now is that we may have clear skies and semi-balmy temperatures, but you need to be about four hundred feet tall to appreciate it. That's about the depth of the layer of air that is trapped beneath an unusual layer of warm air. The classic, and very unpleasant, thermal inversion.

The entire Puget Sound basin has been subjected to a layer of cold air, made even more unpleasant by the fact that with the low clouds and dense fog, there is never a chance for things to warm at all. This mess is expected to continue until Monday night when it appears an inbound impulse with start to flush things out to the east. By Wednesday, if we're lucky, it will be raining. If you had any ideas that I might not be a deeply-died Northwesterner, hear this - I can't wait for it to rain!!!

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