A pair of strong geomagnetic storms could produce a spectacular northern lights show for millions of Americans again this weekend, space forecasters say. The National Oceanic and Atmospheric Administration’s Space Weather Prediction Center issued “strong” geomagnetic storm watches following recent explosions on the sun that triggered multiple

Thanks to a geomagnetic storm, the aurora could be visible over many states from the Midwest to Oregon, with prime viewing forecast for late Saturday into Sunday.