Approximate no wind and the absence of heavy rain could be two of them. Although of course can not be excluded, that sometimes may be some simple patterns created even during relatively heavy rain and wind, but it would be even rather difficult to imagine.
Takriban hakuna upepo na ukosefu wa mvua nzito Inaweza kuwa wawili wa Them. Ingawa bila shaka haiwezi kutengwa, Kwamba wakati mwingine inaweza kuwa baadhi ya mifumo rahisi umba hata Wakati wa mvua nzito Relativt na upepo, lakini Je, kuwa badala vigumu hata kufikiria.