MID-LATITUDE AURORAS: Last night's geomagnetic storm caused by a 'Cannibal CME' was not as strong as expected. Nevertheless, auroras descended into the United States as far south as Colorado and Nebraska. Some were bright enough to photograph using cell phones. Another CME may be on the way following today's almost-X flare.
Full story @ Spaceweather.com. Early warnings can give sky watchers the time they need to catch auroras.