Fears nation could be plunged into third La Nina system

New US-led forecasts suggest the La Nina weather system that brought heavy rains and deadly flash flooding to Australia’s east coast is “struggling to break”, according to Weatherzone.

This means wet weather will persist for a while yet on the east coast, stoking fears of a “third La Nina” event.

Current sea surface temperature anomalies in the Pacific Ocean, showing a distinctive La Niña pattern with cooler-than-average water in the central and eastern equatorial Pacific Ocean and warmer-than-average water in the western equatorial Pacific Ocean (NOAA)

While the Bureau of Meteorology (BOM) said the system will likely ease by “late Autumn or early winter”, forecasters in the US paint a different story.

They monitored sea surface temperature and air pressure difference between Tahiti and Darwin to develop the forecast.

Sydney has been hit with successive rain events, culminating in its wettest start to a year in history. (9News)

“La Niña has a 59 percent chance of continuing through the Southern Hemisphere’s winter and a 50 to 55 percent chance of persisting thorough the Southern Hemisphere’s spring,” Weatherzone said, referring to forecasts from US National Weather Service’s Climate Prediction Centre (CPC) and Columbia University’s International Research Institute for Climate and Society (IRI).

“It is rare for the footprint of La Niña to still be so well established in both the ocean and the atmosphere at this time of year.

“The enduring strength of this current La Niña is something to keep an eye on in the coming weeks and months.”

A light sprinkling of snow dusts Mount Wellington in Hobart. Katy Morgan took this photograph yesterday morning as states in the nation's south-east shiver through a cold snap.

‘Winter on its way’: Snow dusts Aussie peak

The prediction comes as multiple states are lashed by heavy rain and thunderstorms.

“A trough currently sitting over Australia’s northern interior will dip south over the weekend, dragging cloud and rain across large areas of SA, NSW, QLD and VIC from Sunday into the first half of next week,” Weatherzone.

“The rain and cloud will initially focus on Australia’s central and northern interior on the weekend before spreading further south and east early-to-mid mid next week.”

Accumulated rainfall totals reaching 100 to 200mm are forecast for parts of the eastern NT and western and northern QLD.
Accumulated rainfall totals reaching 100 to 200mm are forecast for parts of the eastern NT and western and northern QLD. (Weatherzone)

Accumulated rainfall totals reaching 100 to 200mm are predicted to fall in parts of eastern NT and western and northern QLD.

Broader areas of Australia central and eastern are expected to reach accumulated totals of 40 to 80 mm by the middle of this week.

Let’s take a look and see what the weather is doing across the nation’s capitals this morning.

A “shower of two” and a maximum temperature of 25C is forecast for Brisbane today.

Rain will become less likely from the late afternoon and evening.

Showers are also forecast for Sydney today, with 2 to 5 mm of rain predicted to fall.

The Harbour City has a maximum temperature of 22C forecast.

Melbourne woke to a chilly 9C, but thankfully the mercury is expected to climb to a top of 21C.

It will be partly cloudy.

Similar conditions were felt in the nation’s capital; a low of 7C will give way to a high of 20C.

It will be partly cloudy.

It will also become cloudy in Hobart during the day.

Morning temperatures dipped to 7C. A maximum of 17C is forecast.

There’s a slight chance of a shower in Adelaide today, but on the whole the day will be mostly cloudy.

A maximum of 25C is forecast.

It will be a sunny 34C day in Darwin today.

Last showers could hit Perth, with the temperature expected to range between a low of 18C and a high of 29C.

The BoM said there’s a chance of “gusty thunderstorm this evening”.


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