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

Eastern storms and southern shivers

16:00 EDT

Thunderstorms are on the move through New South Wales and southern Queensland once again today, while southern states shiver.

Summer scorcher looms for two thirds of Australians

14:12 EDT

The most widespread heat in five years could grip parts of southern and eastern Australia next week.

Turbulent Thursday in Vic, Tas, SA

15:52 EDT

Parts of Victoria, Tasmania and South Australia could be lashed by storms and damaging winds on Thursday as a cold front sweeps across Australia's southeast.