Fog banks and overfalls.

Sea fog is caused by warm air passing over cold water. If the air that is in contact with the sea is cooled below its dew point, fog will form.

When fog banks are forecast they may be more prevalent in the regions of disturbed water near overfalls or tide races.

This is because in these regions the turbulence in the sea brings cooler water from the bottom to the surface thus cooling the air above.







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