Deepak Aryal

Central Department of Hydrology and Meteorology, Tribhuvan University, Kirtipur, Kathmandu, Nepal

Yutaka Ishizaka

Division of General education, Aichi Gakuin University, 12 Araike, Iwasaki-cho, Nisshin 470-0195, Japan

Kikuo Okada

Meteorological Research Institute, 1-1 Nagamine, Tsukuba, Ibaraki 305-0052, Japan