A severe geomagnetic storm could cause colorful auroras over Northern California and Alabama CNNNorthern Lights Forecast Upgraded To ‘Severe’ For Half Of The U.S. — When To See Aurora This Week ForbesNOAA issues severe geomagnetic storm watch for only the second time in nearly 20 years OregonLive‘Severe’ geomagnetic storm to slam Earth Thursday, with auroras possible as far south as California and Alabama Livescience.comU.S. Issues Solar Storm Watch After Large Outburst From the Sun The New York Times