Wow! setting off fog horn Posted by: PuffinGin on Sep-09-11 10:37 AM (EST)
I don't know anything about the detection mechanism which sets one off but I bet it takes quite substantial density of fog (or smoke) to do that. I could smell smoke at my house which just NE of Duluth several days last week. I didn't check wind directions at the time but I thought it might have been from fires in Ontario NW of here.
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