SA and Adelaide weather: Metro Adelaide issued with Code Blue before more spring storms

Several trees are down across the city this morning – including one on a major train track that caused delays – as more wild weather hits just days after temperatures in the 20s.

Metropolitan Adelaide will cop up to 40mm of rain in coming days prompting the state government to declare a Code Blue – the fourth within two months.

From Wednesday, people experiencing homelessness will be offered protection from the wild weather including overnight accommodation and other services.

As showers and gusty winds swept in on Wednesday morning, several trees fell across the metropolitan area, including one on the Outer Harbor track at Cheltenham station, which delayed train passengers for about 20 minutes.

The fire brigade was called to cut the large tree down just before 7am with the site cleared and services returned about 7.20am.

A fallen tree caused delays on the Outer Harbor track at Cheltenham Station on Wednesday morning. Picture: Elise Graham

Temperatures are expected to reach a high of 20C on Wednesday, before clouds and a potential thunderstorm develop. It follows a warm night where the minimum temperature was a mild 15.6C around midnight.

“It will feel like spring on Tuesday heading up to 20C but then the wet weather returns tomorrow morning,” Bureau of Meteorology senior forecaster Tina Donaldson said on Tuesday.

More wild weather is on the way for Adelaide. Picture Roger Wyman

“To start off with it will feel warm and rainy particularly when the winds are still from the north, but once the winds come around to the west in the afternoon it will certainly start to feel much cooler as the temperatures drop,” she said.

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Sallie Spicer took her daughter down to Henley Beach on Tuesday to make the most out of the warm weather before the state expects rain on Wednesday.

“I hate winter, I hang out for summer, especially the longer days,” Ms Spicer said.

Ms Spicer said four year old Mollie wants to go to the beach “all the time” but it has been too cold to take her this winter.

“Hopefully there’s more warm weather ahead, we are big beach lovers in summer.” she said.

Sallie Spicer with her daughter Mollie enjoying the warmer weather at Henley Beach ahead of the deluge. Picture: NCA NewsWire / Brenton Edwards

It comes as the BOM on Tuesday officially declared a rare triple La Nina has returned to Australia this spring, lasting until the beginning of next year.

The major forecaster previously stated there was a 70 per cent chance La Nina would return based on the increased likelihood that a negative Indian Ocean Dipole event would continue into Spring, bringing higher than average rainfall totals to the entire east coast.

New climate data released by the BOM has confirmed the negative IOD would continue alongside cool tropical Pacific Ocean temperatures, marking the “typical patterns of a La Nina event”.

Up to 15mm of rain could fall on Wednesday, and up to up to 8mm on Thursday where temperatures will drop to a maximum 17C.

Friday will be cooler again at just 15C, and up to 15mm will fall.

“Once the main cold front comes through in the afternoon then the temperature will drop with Friday looking to be the coolest day, that’s when the low pressure system that this is all connected to moves closer to us,” Ms Donaldson said.

Adelaide was warm on Tuesday before another weather system brought rain to the city on Wednesday. Picture: Brenton Edwards

Saturday will stay drizzly with up to 10mm of rain expected, and Adelaide will generally observe a rainy spring, Ms Donaldson said.

“Spring can be a very changeable period because we get a lot of frontal systems moving through at this time of the year so it can be quite changeable spring,” she said.

“Certainly the outlook is looking wetter than average for spring.”

The State Emergency Service also issued a ‘community readiness’ alert for the state on Tuesday afternoon.

The alert asks South Australians to take early action due to cumulative rainfall increasing the risk of flash flooding and road closures in certain areas.

The alert also recommended stocking up on food, water, medications and pet food to avoid travelling in the storm.