I really want this Sky Alarm, although that being said since I am in Bangalore 90% of the time it will happen that I would step outside and find the sky completely covered by Clouds.

Cool Space Thing happening. Go outside and look up (via XKCD)
Thinking about it a little more, it might be a fun project to create. The data can be pulled from some of the astronomy sites that track predictable events (eclipses/meteor showers etc). The tricky part would be to get information for events that are last min, such as Aurora sightings etc.
Something to think about for when I get some free time.
– Suramya