Are you anxiously awaiting the arrival of spring migrants? You can track Spring migration at Birdcast.

The models use the Global Forecasting System to predict suitable conditions for migration.  Bird migration forecasts show predicted nocturnal migration 3 hours after local sunset and are updated every 6 hours. These forecasts come from models trained on the last 23 years of bird movements in the atmosphere as detected by the US NEXRAD weather surveillance radar network.