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

Rockhampton left reeling after La Nina rains fail in Queensland

17:00 EDT

La Niña has overlooked some towns and farms in Queensland this time around, with some places just enduring one of their driest starts to a year on record.

More storms in eastern Australia today

10:08 EDT

A second day of severe thunderstorms will hit parts of Queensland and NSW today, with large hail, damaging wind and heavy rain all possible in both states.

Get a sneak peak into the new Weatherzone Beta website experience while we continue to build out its full functionality.
Explore new datasets, map layers, 7-day charts, 12-month trends and much more!