The coastal redwoods are sequoias, specifically Sequoia sempervirens.
Storms are generated continuously in the Gulf of Alaska year-round. In the summer they are modest and careen into the Alaskan panhandle and British Colombia. Those areas are northern rainforests of conifers. Come Fall they start coming further south before hitting the coast and by winter they are entering California -- sometimes staying off-shore until central California latitudes; e.g., San Francisco, Monterey. By then of course they have the magnitude of an "average" winter storm. But in the late Fall or early Winter it's normal for an annual storm to plunge into the lower 900's and hit the coast of Washington, Oregon, or northern-most California (i.e., Del Norte, Humboldt, Mendocino counties).