Fairfax Media Network

Weather Glossary - J

Search

Jet max

(Speed Max, Jet Streak) A point or area of relative maximum wind speeds within a jetstream.

Jet streak

A local wind speed maximum within a jetstream.

Jetstream

Relatively strong winds concentrated in a narrow stream in the atmosphere, normally referring to horizontal, high-altitude winds. The position and orientation of jetstreams vary from day to day. General weather patterns (hot/cold, wet/dry) are related closely to the position, strength and orientation of the jetstream (or jetstreams). A jetstream at low levels is known as a low level jet.

JTWC

Joint Typhoon Warning Center. The JTWC issues warnings and forecasts for tropical systems across the Pacific and Indian Oceans.

Display Your Local Weather

Weather News

End in sight for Perth warm spell

11:31 EST

Perth's run of unseasonably warm and dry weather will come to an end on Friday when a powerful cold front crosses the southwest corner of Western Australia.

Who said Queensland isn't cool?

13:30 EST

Over the last week southern Queensland has seen a series of chilly mornings.

Summer rain sees drought declarations revoked for parts of Queensland while others wait

11:25 EST

Good summer rainfall has seen drought declarations revoked in parts of Queensland while others in the state wait in hope for rain.