Just got the latest forecast, and it looks promising. Lingering effects of a coronal hole — and a tighter connection between the blizzard of electrons and protons streaming our way from it — have pushed the Kp index up to 6 this late afternoon. As I write, a moderate (G2) geomagnetic storm is underway with a forecast for the same tonight. Skywatchers living in the northern half of the U.S. should be on the lookout for aurora. There will be no moon in the way until after 1:30 tomorrow morning, so plan a visit to a favorite dark sky site.
* Update 11:30 p.m. — The display was well underway even during twilight and filled the northern sky with tall rays and several bright, glowing patches from 7:30-8 p.m. (Central time). Then it all quickly faded back, so that by 8-8:30 p.m. there was almost nothing left. Around 11:15 some faint rays and glows returned.