The Lyrid meteor shower, one of the oldest known meteor showers, peaks April 21-22 and will last around 14 days. The annual event occurs when the Earth passes through the debris field of distant Comet Thatcher. The best viewing conditions are expected to be clear skies and mild temperatures. The Lyrids are known for their fast, bright meteors and sometimes produce fireballs. The peak activity is expected on Tuesday evening, April 21st through the following morning. NASA recommends viewing a meteor shower from a very dark area far away from city lights. If the moon sets at 1:20 a.m. Wednesday, the best viewing window will likely fall between 2 and 5 am.