Sometimes, when a front comes from the west, we get a 'rain shadow'-does it matter what kind of front it is?

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by Jeff Renner

Bio | Email | Follow: @Jeffrennerwx

KING5.com

Posted on March 22, 2013 at 6:38 PM

Sometimes, when a front comes from the west, we get a 'rain shadow'-does it matter what kind of front it is?

This is often referred to as the Olympic rain shadow. Winds moving over the Olympics rise up the windward or exposed slopes and descend the leeward slopes (the side opposite the wind direction). That leads to warming and evaporating moisture...and a rain shadow. The type of front isn't important-the direction of the wind is. When winds are from the south, the rain shadow is to the north of the Olympics...leading to reduced rainfall in places such as Port Townsend, Sequim and the San Juans. When the winds are from the west, the rain shadow is to the east-leading to reduced rainfall over the central to north part of Puget Sound.

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