An average of NUMBER@1 tropical cyclones of tropical storm intensity form annually worldwide , with NUMBER@2 reaching hurricane/typhoon strength , and NUMBER@3 becoming intense tropical cyclones -LRB- at least Category NUMBER@4 intensity on the Saffir-Simpson Hurricane Scale -RRB- .

Usually , about NUMBER@1 tropical cyclones of tropical storm strength form worldwide every year , with NUMBER@2 reaching hurricane/typhoon strength , and NUMBER@3 becoming strong tropical cyclones -LRB- at least Category NUMBER@4 intensity on the Saffir-Simpson Hurricane Scale -RRB- .
