potsu-potsu（ポツポツ）
1. Light, sparse raindrops
dokan（ドカン）
1. A loud explosive sound
biri-biri（ビリビリ）
1. Continuous electric stimulation or tingling
para-para（パラパラ）
para-para describes light, scattered drops falling in quick, irregular succession.
Word type: Giongo（擬音語）
Japanese onomatopoeic words that represent actual sounds such as impacts, movements, or environmental noises.