A winter storm moving across the northern plains this week will bring snow, strong winds, and very cold temperatures to the Black Hills region, where a Winter Storm Warning is in effect. Arctic air will pour into the region tonight behind a cold front. Snow will develop over northeastern Wyoming through northwestern South Dakota tonight, where six to twelve inches of snow are expected. Strong northwest winds of 25-35 mph with gusts to 50 mph will cause blowing snow, reduced visibilities, and bitterly cold wind chill values. For the latest information about this storm, read our winter weather statement or check the winter weather briefing page.