You can now sign up for email (or SMS) notification from NASA when the Internation Space Station (ISS) is visible in your area.
NASA’s Spot the Station service sends you an email or text message a few hours before the space station passes over your house. The space station looks like a fast-moving plane in the sky, though one with people living and working aboard it more than 200 miles above the ground. It is best viewed on clear nights.
Go here to read more and sign up.