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WINTER STORM WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY AFTERNOON... * WHAT...Heavy mixed precipitation possible. Ice accumulations of one tenth to four tenths of an inch and total snow accumulations of up to one inch possible. * WHERE...In Oregon, Upper Hood River Valley and Central Columbia River Gorge. In Washington, Central Columbia River Gorge. * WHEN...From Saturday afternoon through Sunday afternoon. * IMPACTS...Power outages and tree damage are likely due to the ice. Travel could be difficult.