Oh, that was you! Sheesh. By the way, happy new year (you should hear all the sound of firecrackers and probable gunfire going off in So Cal right about now). Does the bay drain because of low tide? Or is it just ... by God's whim? I gotta tell you, if I saw that, it'd scare the bejeezus out of me if I didn't know it was "normal"!
North wind, shallow bay, but I have seen the long Islang sound empty one or twice too.