A new surge of arctic air is expected to drop south over the Midwest and northern Plains states, bringing more potentially hazardous weather by midweek. This liveblog has now ended. You can find the ...

Two winter storms will bring snow, freezing rain and arctic cold in a one-two punch to parts of the United States this week. From coast to coast, more than 96 million people were covered Monday by ...

Lawmakers expressed concerns over weather modification and geoengineering. A congressional subcommittee spent nearly two hours on Tuesday discussing the rarely practiced but frequently talked about ...