AURORA ALERT: A coronal mass ejection (CME) swept past Earth earlier today (1000 UT, July 22nd) and, although it did not spark auroras right away, solar wind conditions in the wake of the CME are increasingly favorable for a geomagnetic storm. Sky watchers in, e.g., Canada and northern-tier US states like Wisconsin, Minnesota, Michigan and Washington should be alert for auroras tonight.
It’s hot here right now, 90 degrees hot, which might not seem like a big deal to anyone else, but here in the un-air conditioned Pacific Northwest, it’s really uncomfortable. So the possibility of seeing the aurora might make up for it. I don’t know if I see anything from my house, but perhaps some local folks will grab a picture or two. From what I can tell, film picks them up more readily than the naked eye: you might have an image without realizing it. Take a look at the gallery linked above and see what they say.