Kimbunga
Vimbunga huwa na eneo la shinikizo duni kwenye kitovu chake (low-pressure center). Upepo mkali unazunguka haraka kitovu hiki karibu na uso wa bahari au uso wa nchi (closed low-level atmospheric circulation, strong winds). Mvua za radi zinazunguka kitovu pamoja na mwendo wa kimbunga chote na kuleta mvua nzito (spiral arrangement of thunderstorms that produce heavy rain).