一个严重的风暴系统席卷美国，造成了从雪到龙卷风的各种天气灾害。 A severe storm system sweeps across the U.S., causing varied weather disasters from snow to tornadoes.

一个强大的风暴系统正在横扫美国，带来各种恶劣天气威胁。 A powerful storm system is moving across the U.S., bringing varied severe weather threats. 最初影响落基山脉和西南部，有降雪和火灾风险，然后向东移动，在中心地带和南部造成龙卷风、破坏性大风和暴风雪。 Initially affecting the Rockies and Southwest with snow and fire risks, it then moves east, causing tornadoes, damaging winds, and blizzard conditions in the Heartland and South. 新奥尔良的狂欢节庆祝活动受到影响，一些游行被取消。 Mardi Gras celebrations in New Orleans were impacted, with some parades canceled. 预计风暴将于周三到达东海岸，带来大雨和大风，并在周四消退。 The storm is expected to reach the East Coast by Wednesday, bringing heavy rain and winds, and subside by Thursday.