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Sunday, February 5, 2012

Summer . . . in February . . . in SEATTLE?

The high temperature at Sea-Tac yesterday (February 4) was 60 degrees, just three degrees short of the record high temperature for that date. That's why these people were gathered on Pier 62-63 just before sunset.


This is what they got to see.



The unseasonal temperatures around Seattle were caused by a ridge of high pressure over the region that led to a strong southeasterly flow crossing the Cascades that descended over western Washington and Oregon. As that air descended the western Cascade slopes, it warmed by compression. For a compelling discussion of the conditions that led to our February "heat wave" (if 60 degrees can be called a "heat wave"), see this post on the Cliff Mass Weather Blog.

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