Vog

A portmanteau of 'volcanic' and 'smog,' vog is the hazy air pollution created when sulfur dioxide from Kilauea reacts with sunlight and moisture. The trade winds typically push it toward the Big Island's Kona coast, but a south wind can spread vog all the way to Oahu, irritating asthma sufferers statewide. Hawaii's daily forecast includes a vog advisory the way the mainland includes pollen counts.