BALTIMORE, MD — Two rounds of snow are forecast in the coming days before part of the polar vortex dips into the Lower 48 states, bringing bitter and dangerously cold temperatures to Maryland.

BISMARCK, N.D. (AP) — Harsh cold descended on the nation’s midsection Monday as a polar vortex gripped the Rockies ... school students went to the Maryland State House. Here’s what happened.

Road conditions were deteriorating Saturday in the central U.S. as a mix of snow, ice and plunging temperatures arrived, with forecasts calling for the dreaded combo to spread eastward in the ...

A lobe of the polar vortex, a ring of freezing air typically found near the North Pole, will once again move into the central ...