The National Weather Service issues a litany of notices before and during inclement weather events. They can be important signals on how to respond.

A major winter storm is forecast to bring bitter cold, heavy snow and ice to large parts of the U.S., with dangerous conditions expected to persist for days.

A winter weather advisory was issued by the National Weather Service on Wednesday at 3:13 p.m. EST in effect until Friday at 7 p.m. EST for Ontonagon, Baraga and Houghton counties.

A winter weather advisory was issued by the National Weather Service on Wednesday at 12:13 p.m. in effect until Thursday at 10 a.m. for Southern Centre and Southern Clinton as well as Blair and Somerset counties.

ERCOT, which operates the Texas power grid, has issued an advisory for "extreme cold weather" in Texas. TEXAS, USA — The Electric Reliability Council of Texas (ERCOT) has issued an advisory for "extreme cold weather" ahead of the expected winter storm in Texas this weekend.

Air travelers could begin to see the impact soon from the pending winter storm in North Texas. American Airlines has issued a travel alert allowing

Ahead of the winter storm, a pair of low-pressure systems are expected to sweep through the Great Lakes region over the next couple of days, churning up lake effect snow that could total up to 2 feet in some areas through the end of the work week, the National Weather Service said.

Most of the middle and eastern portions of the United States are bracing for a significant winter storm that could impact 150 million people. While the major winter storm is supposed to hit this weekend,