While the shower can produce as many as 100 meteors an hour, this year's will likely boast an average of 10 to 20, which amounts to one meteor every three or so minutes. According to the American Meteor Society, the Lyrids generally lack a "persistent" trail but can produce dramatic fireballs as they enter the Earth's atmosphere.
Weather and cloud-permitting, prime viewing time is late tonight (April 21) and early tomorrow morning (April 22), with the absolute best action expected just before dawn. While the meteors will originate from the same source (around the constellation Lyra), there's no need to stare in one particular area, as they'll make themselves known all across the sky.
If you miss out tonight, you'll likely have to wait until late October for the Orionid shower to see another display of this quality.