(CNN) -- Call it a meteorological mystery: Forecasters warned that there would be at least six Atlantic hurricanes this season, but so far we've seen only one. It's the first year in recent memory that every major hurricane forecast has busted after pointing to "above normal activity." We are passing the season's halfway point. Normally, the Atlantic would see its first hurricane by August 10, and a major hurricane (Category 3 or higher) by September 4. But this year is not normal. 2013's first hurricane -- Humberto -- was a month late. It was so behind schedule it nearly set a record for tardiness.
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Number of 2013 Atlantic storms is above average, but intensity hasn't matched forecasts
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Halfway into season, Atlantic has only seen one hurricane -- a weak one named Humberto
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Weather service stands by forecast for 13 "named storms," including 6 hurricanes
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Experts were surprised by hurricane-killing dry African air and high Gulf winds
--In the western Atlantic and @placeholder, fast horizontal winds have been cutting off the tops of potential hurricanes, sapping their power.