There are little quirks those of us living in coastal communities that we take for granted and pay little attention. For instance when I ride around the peninsular in New Bedford on the south coast of Massachusetts, I see a solid colored flag on each side. The west is Clarks Cove and the east is Buzzards Bay. These are called Coastal Warning Display Signals. The flag above is small craft advisory. There is also a flag for Gale Warning, Storm Warning and Hurricane Warning.
These are remnants of a time long gone but still serve as an easy reference to the weather of the day. There are lots of people who drive, walk and bike around the point and all of us pay attention to the weather flags.