A moisture-laden storm system will bring major rain and snow totals from Washington to California through the early part of the week ahead. Cities like Seattle and Portland could receive their first snow of the season. Parts of California may need to be on watch for avalanches, flooding and mudslides. Some rain may fall in fire-stricken Los Angeles. If you’re traveling across the West, including on Interstates 5, 80 and 90, you’ll need to have a plan to avoid weather delays. Interstate closure is possible. - Videos from The Weather Channel | weather.com