First Alert Weather: Frost, fog and snow flurries for the morning drive! Sunshine returns later today -Briana

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Frost, fog and a few snow flurries! Light snow fell Tuesday morning over portions of Washington and Oregon, mainly along valley locations east of the Cascades. Snow caused slick conditions for drivers Prosser to Yakima and up to Ellensburg.  Light snow is possible until late this morning in the Yakima and Kittitas Valleys. Drivers may also encounter some patchy fog in the Tri-Cities, Walla Walla and Pendleton.
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Clouds will decrease throughout the day. Much colder air moves in across the Northwest this week. Highs only in the 40s, cooler than normal for this time of year. Overnight lows down into the teens and 20s once again. The colder air continues through the end of the week.
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Here is a look at current mountain pass conditions:

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I-84 at Meacham