wind![click to hear](/images/speaker.jpg)
Displacement of air caused by variations in pressure between two regions of the atmosphere.
pennant ![click to hear](/images/speaker.jpg)
Symbol of a wind blowing between 55 and 60 mph.
barb ![click to hear](/images/speaker.jpg)
Symbol of a wind blowing between 9 and 14 mph.
half barb ![click to hear](/images/speaker.jpg)
Symbol of a wind blowing between 3 and 8 mph.
shaft ![click to hear](/images/speaker.jpg)
Symbol of a wind blowing at a speed lower than 3 mph.
wind arrow ![click to hear](/images/speaker.jpg)
Symbol that uses the position of the shaft to indicate wind direction and the number of barbs and pennants to indicate wind speed.
calm ![click to hear](/images/speaker.jpg)
Symbol indicating the absence of wind.