Bitter temperatures are forecast to hit swathes of the U.S. this weekend as a polar vortex—the area of cold air that ...

A geomagnetic storm is expected this weekend when an burst of plasma and magnetic field from Sun will glance off Earth.

A major winter storm is bringing ice, snow and freezing rain from the Plains to the East Coast through Tuesday.

Aurora borealis could ring in the New Year in New Hampshire's skies. See the northern lights forecast for tonight ...

The biggest flood risk from the incoming storm will extend from Maryland northward. Wind will also affect states farther south.

Learn more. Restoration efforts are underway after a storm knocked out power to thousands of homes and businesses across Maine. The storm – which brought periods of freezing rain, soaking rain ...

Learn more. Communities across central Maine are bracing for the possibility of flooding Wednesday, nearly a year after a storm brought widespread flooding and wind. Across the region, school ...

NOAA's forecast issued Monday predicted the aurora could be visible as low as New York, including most of New Hampshire.