The National Oceanic and Atmospheric Administration said in a news release Monday that drier-than-expected air led to the weak season. There were 13 named storms, but only two Ingrid and Humberto became hurricanes. Neither was considered ``major,'' a storm that reaches Category 3 strength.
The average Atlantic hurricane season produces six hurricanes, of which three are ``major.''
NOAA says 2013 will rank as the sixth least-active year since 1950, in terms of the collective strength and duration of tropical storms and hurricanes.
Only one storm, Tropical Storm Andrea, made landfall in the United States.
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