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Weather Glossary - J


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.


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.


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

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QLD's storm season in full swing

18:19 EDT

Thunderstorms have flared up again over Queensland, with stormy skies likely to be a daily occurrence over the next week.

Haystack fires to burn grain producers who baled up failed crops, didn't get insurance

16:33 EDT

Fresh haystacks are exploding into flames across Victoria and South Australia and experts are warning it could be the start of a disastrous season.

National Servicemen's Memorial Pipes and Drums Band witnesses devastating drought on outback tour

15:03 EDT

One of Australia's most renowned pipe and drum bands will end an ambitious tour this weekend with a renewed understanding of how rural Queenslanders are dealing with drought.