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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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Storm warning for parts of southern WA extended to Perth metropolitan area

23:34 EST

An unusual weather pattern is bringing storms to parts of southern Western Australia, with residents in the Central West, Lower West, Great Southern and Central Wheatbelt districts told to brace for damaging winds and possible flash flooding.

Winter winds bring a chill to Melbourne

16:43 EST

While northern parts of the country have experienced unseasonably warm temperatures, winter is business as usual in the south.

Grantham flood inquiry: Former quarry owner says western embankment natural, not manmade

16:15 EST

The former owner of the Grantham quarry that allegedly contributed to the fatal 2011 flood has said the western embankment beside the quarry was a natural landmark and not manmade.