National 'Bomb cyclone' forecasted to bring heavy snow, blizzard conditions and dangerous travel December 28, 20253:28 PM ET Kristin Wright People walk through the snow in Brooklyn after an overnight storm on Saturday in New York City. Spencer Platt hide caption toggle caption Spencer Platt An intense cyclone system is fueling a mix of severe weather, including a winter storm that will impact upper parts of the United States.

Heavy snow, blizzards, extreme cold and damaging winds are likely to create hazardous conditions stretching from Montana east to Maine, and Texas north to Pennsylvania, according to the National Weather Service (NWS). More than eight million people were under winter storm warnings from the NWS on Sunday afternoon.

Nearly two million people were under blizzard warnings. Meteorologists warn that after winter weather Friday and Saturday, an arctic front clashing with warm air could rapidly intensify into a 'bomb cyclone' over the Midwest and Great Lakes through Monday.

A 'bomb cyclone' or bombogenesis is a rapidly deepening area of low pressure that creates harsh weather conditions. Weather Winter storm brings heavy snow and ice to busy holiday travel weekend "We are anticipating some pretty big snows over the next 24 hours, especially across east central Minnesota to northern Wisconsin to the Upper Peninsula of Michigan.