Why Is Eastern Washington Hotter Than Western Washington?

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By By Steve Pool

SEATTLE - It was pretty hot over here toward the end of July, but Eastern Washington was baking in triple digits. Why the difference?

Western Washington can thank its proximity to the Pacific Ocean as a natural air conditioning. But the Cascade Mountains act like a wall that keeps the cool air from getting over to the other side, leaving them to bake in the hot summer sun. And even on our hottest days when we get air blowing over from Eastern Washington, the water around here keeps us from getting over 100.

It can work in the opposite way in the winter. Sometimes, arctic air can filter down into Eastern Washington, but it won't be able to jump the Cascades into Western Washington, keeping us in the 30s and 40s while Eastern Washington shivers in the teens and 20s.

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YouNews AR2192 - final images AR2192 - final images
Sunspot AR2192 is disappearing from view as it nears the edge of the sun. This is a series of images of the sunspot taken at 2 day intervals starting on October 19th and ending on Monday, October 27th. There are two images for October 23rd (to include the solar eclipse view).