Page "Roaring Forties" Paragraph 4

Unlike the northern hemisphere, the large tracts of open ocean below 40th parallel south ( interrupted only by Tasmania, New Zealand, and the southern part of South America ) mean that higher windspeeds — the Roaring Forties — can develop.

Similar but stronger wind conditions are prevalent closer to the South Pole ; these are referred to as the " Furious Fifties " ( 50 to 60 degrees south ), and the " Shrieking " or " Screaming Sixties " ( below 60 degrees south ).

The latitude ranges for the Roaring Forties and similar winds are not consistent, shifting towards the South Pole in the southern summer, and towards the Equator in the southern winter.