What is the soft whistle I've been hearing? I don’t see any fog, so what else could it be?
Heidi, that is the small electronic fog horn. I don't know what actually turns it off and on, maybe someone else does.
Update on the fog horn -- The little fog whistle that you sometimes hear is operated and maintained by the Coast Guard. It is automatically turned on when humidity reaches a calibrated set point. It was on this morning due to a malfunction.
Thanks for taking the time to solve that mystery!