ИСТИНА

Case studying of short-term dynamics of wind profiles in the lower 500-m height air layer in Moscow has been presented with the use of the sodar data. Quick changes of wind direction in time are connected as a rule with synoptic processes such as passing of atmospheric front, axis of ridge or axis of trough above a site of sounding. Usually wind turning in time is right although sometimes it may be left – e.g., during passing of ridge axis at its Northern periphery. Extremely quick and sharp changing of wind direction up to 360º during several hours may took place in close vicinity of an anticyclone center or a cyclone center. Some weather phenomena which are connected with Cb clouds (thunderstorms and others) are accompanied by quick acceleration of wind speed.