On average , NUMBER@1 named storms occur each season , with an average of NUMBER@2 becoming hurricanes and NUMBER@3 becoming major hurricanes -LRB- Category NUMBER@4 or greater -RRB- .

On average , NUMBER@1 named storms form each season , with an average of NUMBER@2 becoming hurricanes and NUMBER@3 becoming major hurricanes -LRB- Category NUMBER@4 or greater -RRB- .
