The warblers must be staying low to the ground in the cool and breezy mornings. I saw lots of white throated and other sparrows and small birds, but no flittering warblers. But, as I have said, I am not that great a birder.
This slow, cool spring has been wonderful for bulbs, the daffodils and tulips lasting for weeks, and I am guessing the perennials will be great as well once the really get started, so in many respects this has been a particularly nice spring. One just has to dress as though it is April instead of almost June.