Earth's magnetic field was struck by a "severe" solar storm Monday (Jan. 19), triggering vibrant auroras in the U.S. and large parts of Europe. The storm broke a record that had stood for more than two decades.

A winter storm advisory, issued by the National Weather Service in Sacramento, will last until 4 p.m. Monday

A rare "severe" geomagnetic storm watch is in effect for Tuesday, with the northern lights potentially visible Monday night in parts of California - though clouds are in the Bay Area forecast.

A rare and powerful solar storm, the strongest of its kind in more than two decades, is impacting Earth, according to the National Oceanic and Atmospheric Administration Space Weather Prediction Center. Over the past couple of days, the storm triggered unusual sightings of aurora borealis across parts of Northern California.

The storm could also impact power systems and spacecraft operations.

(KRON) — A “severe” geomagnetic storm watch has been issued for Monday and Tuesday as the largest solar radiation storm in more than 20 years hits Earth, according to the National Oceanic and Atmospheric Administration’s Space Weather Prediction Center.

A winter storm potentially affecting half of the U.S. population this weekend rivals the 1993 Storm of the Century in size. A meteorologist explains why it's so alarming.

Two weeks after the severe holiday storm, Hesperia residents demand answers as to what went wrong. City staff claims the storm was a rare "1,000-year" event.

WRIGHTWOOD, Calif. (AP) — Another powerful storm system that could soak Southern California with its wettest Christmas in years rolled into the region on Thursday, potentially causing more flooding and mudslides a day after heavy rain and gusty winds ...

Add Yahoo as a preferred source to see more of our stories on Google. An atmospheric storm caused heavy rain across Southern California over Christmas. The National Weather Service warned residents of 'life-threatening' floods and mudslides. Gov.

The weak storm system that brushed coastal California with light showers Thursday is about to become a monster. Just not here.