Will Trevor be clever and bring some rain?

'Credible scenario' ex-cyclone could help bring rain to north

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Cyclone Trevor is set to bring heavy rain of up to 300mm a day to parts of the gulf country as it crosses the coast. Will it feed moisture into a cold front crossing NSW on Monday as the ex-cyclone drifts down ? It's a possible scenario.

Cyclone Trevor is set to bring heavy rain of up to 300mm a day to parts of the gulf country as it crosses the coast. Will it feed moisture into a cold front crossing NSW on Monday as the ex-cyclone drifts down ? It's a possible scenario.

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Autumn temps to cool hot west

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As Cyclone Trevor threatens the Northern Territory coastline, forecast models show that "a conveyor belt" of moisture could drift down into northern NSW.

While Trevor is causing mayhem along the Gulf country, there may be some silver lining to the event, depending on how the system tracks.

Currently Cyclone Trevor, a large and dangerous system, set to reach category four intensity, is picking up large amounts of moisture as it travels over the warm waters of the gulf. It is likely to cross the Northern Territory coast on Saturday and drift down as a tropical depression over the drought-hit Barkly Tablelands.

Models have the tropical low moving further south then drifting across the breadth of Queensland, bringing some rain there.

Related: Big drop on border sees almost 200mm fall north of Moree ' Video

But it is possible that the ex-cyclone system could meet up with a cold front that will sweep across NSW on late Sunday and Monday. If the systems meet up, it would stream moisture down into the cold front, hopefully increasing rainfall totals as the front moves from south to north-east NSW, Bureau of Meteorology forecaster Anita Pyne said.

While the forecast track of the low depression from Cyclone Trevor was unpredictable, it was a "credible scenario" the two systems could meet up, bringing some more rain than already forecast as the cold front  pushes through.

The cold change will bring up to 20mm in some southern parts of NSW, and in western NSW see temperatures fall from 40 degree highs on Sunday to mid-20 maximums on Monday. For instance Dubbo will fall from 37 max on Sunday to 27 max on Monday, with 2-20mm of rain possible.

The cold front meeting the tropical low could  act as a conveyor belt for moisture into northern NSW.

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