I live on Lake Tawakoni, in 2007 it dropped 14' and figured it might take several years to fill up, that July a freak front blew in from the gulf, and dropped 22" in three days, and the lake went from 14' low to 2' over the retaining walls.
This year it dropped about as much, but since the snow, ice and rain and fog, its dramatically up several feet and rising. I'm excited that my boat may get launched this year.