Abstract
For the purpose of prevention of shipwreck, especially small vessel, I studied some vortical disturbance off Wakasa Bay using the PPI scope photographs taken at Fukui radar site during the special co-operative observation for heavy snow fall in Hokuriku district from Jan.18 to 22 1966. Namely, first I attempted to catch the dynamic developing and moving of vortical disturbance by Fujita's Cine-Meteorology technic with 8mm cine-camera. Next, I investigated meso-scale structure of vortical disturbance by using the surface meteorological elements and, conversion method of aerological data from thier time change to space change.
