Wind arrow
From Glossary of Meteorology
wind arrow
(
Also called wind shaft.) A short straight line terminating with an arrowhead centered on a station location on a synoptic chart.
Also called wind shaft.) A short straight line terminating with an arrowhead centered on a station location on a synoptic chart.
It represents the direction from which the wind blows. The length of the line may be representative of the wind speed.