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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.

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Alice Springs the calm centre of Australia's wild weekend weather

13:15 EDT

With wild weather having erupted across the margins of the continent over the weekend, the interior of Australia was pleasantly devoid of significant weather.

Sydney storms: 12,000 insurance claims lodged from hailstorm, $31 million in damages

10:53 EDT

More than 12,000 insurance claims have already been lodged with damages at an estimated $31 million following the .

Cyclone Alfred forms in Gulf of Carpentaria, BOM warns of damaging winds, rain

09:57 EDT

A category one cyclone has formed in the Gulf of Carpentaria but is due to weaken before heading towards the Northern Territory coast.