Embryonic storm cells will never be able to develop further under prevailing unfavourable climatological conditions and this is why the south atlantic and the eastern south pacific are devoid of tropical cyclones 在南太平洋东部及南大西洋，因长期受到不利的气候环境支配，风暴的初始胚胎受先天限制，无从发展，热带气旋亦因而绝迹。
