windsock

n.

A truncated cloth cone mounted on a mast, used to show the direction of the wind.

Synonyms:

wind cone, air sock, wind sleeve, drogue, sock

typhoon

n.

A tropical cyclone occurring in the western Pacific or Indian oceans.

hurricane

n.

A severe tropical cyclone originating in the equatorial regions of the Atlantic Ocean or Caribbean Sea or eastern regions of the Pacific Ocean, traveling north, northwest, or northeast from its point of origin, and usually involving heavy rains.

anemometer

n.

An instrument for measuring wind force and velocity.

Synonym:

wind gage, wind gauge