Earth is passing through a stream of dusty debris from Comet Thatcher, the source of the annual Lyrid meteor shower. The best time to look is during the hours before dawn on Thursday, April 22nd, when the shower peaks.
Lyrids appear to stream from the vicinity of the bright blue star Vega in the constellation Lyra high in the northern sky. This is not an intense shower, but some years it is pretty: northern sky watchers typically see between 5 and 25 meteors per hour.
http://spaceweather.com