A powerful winter storm slammed communities from the Plains and Midwest through the Tennessee Valley on Tuesday and Wednesday.

The snow event is forecast to be over by noon Wednesday but the cold temperatures will probably linger through the weekend.

Storm Kingston swept across the U.S. from the Midwest into the South and mid-Atlantic, bringing snow, ice and dangerous road conditions to cities including Tulsa, Oklahoma, Kansas City and Roanoke, Virginia.

The last in a long train of storms will bring snow and ice to the Mid-Atlantic and Carolinas on Wednesday. While Washington will be near the northern edge of the storm starting late in the morning — with a dusting to a half-inch of snow possible in the District and areas to the south by the evening — impacts will be moderate to major farther south.