Tau Herculids: Astronomers waiting to see if minor meteor shower turns into a storm

The best meteor showers produce up to 50 meteors per hour, meteor storms produce more than 1,000 meteors per hour. (FlickR: Jeff Sullivan)

If predictions are correct, some places on Earth will see an intense meteor storm at the end of this month. 

An outburst of the annual Tau Herculids shower is expected to last about an hour on May 30 or 31 (the date depends upon where you live in the world).