Clear skies for space station sighting tonight

Look up at 6:09 p.m. tonight and you might be able to spot the International Space Station as it passes over Johnson Space Center.
KHOU reports that skies should be clear enough for a sighting tonight, but you've just got 3 minutes, since the shuttle's moving at least 17,500 miles per hour.
See the JSC flyover schedule here. It's updated every couple of weeks.
You can sign up for alerts on the space station's sighting schedule via RSS feeds, too, and there's a SkyWatch tool here if you want more detailed information on tracking the space station.
More interested in what's happening on board? Follow the action here. Expedition 22 Flight Engineer T.J. Creamer is trying his hand at Tweeting . . .