Space Weather
Nowadays, if I have difficulty with my cellphone or modem, I check :http://www.swpc.noaa.gov/today.html for information of solar & geophysical activities. More often than not, when there's such activities, I have problem in my electronic communication devices.
After reading an article (which I cant relocate) I think I will check that website before flying. Apparently, solar activity influences airplane. I'm not saying that we are doom if we fly on the day of solar storm, but we need to be cautious, as it means more radiation up in the sky. As our polar area affected more by the solar storm, airplane flying in the area might experience radio trouble, navigation errors.
On the bright side, the more solar storm, the more Aurora's, or so they say... more info in here