Displacement of air caused by variations in pressure between two regions of the atmosphere.
Symbol of a wind blowing between 55 and 60 mph.
Symbol of a wind blowing between 9 and 14 mph.
Symbol of a wind blowing between 3 and 8 mph.
Symbol of a wind blowing at a speed lower than 3 mph.
Symbol that uses the position of the shaft to indicate wind direction and the number of barbs and pennants to indicate wind speed.
Symbol indicating the absence of wind.