NSW Braces for Severe Supercell Thunderstorms with Giant Hail and Destructive Winds

Severe supercell thunderstorms, capable of producing giant hail and destructive winds, were forecast for parts of New South Wales on Sunday, as the eastern states continued to experience highly volatile weather over the weekend.

On Saturday, intense storms drenched northern and eastern New South Wales as well as large portions of Queensland. Wind gusts reached up to 98 km/h in Goulburn, while the Coffs Harbour region recorded rainfall totals between 30 and 50 mm.

In a dramatic incident on Saturday afternoon, a man in his 20s was struck by lightning while swimming at Ettalong Beach on the New South Wales Central Coast. Fellow swimmers pulled him from the water and administered CPR until first responders arrived. He was transported to Gosford Hospital in serious condition and subsequently transferred to Royal North Shore Hospital.

On Sunday morning, a hospital spokesperson confirmed that the young man remained in a critical but stable condition.

Witnesses reported that while storm activity was visible in the distance toward Gosford, the beach area itself was clear and sunny, with the lightning bolt appearing to strike “out of nowhere.”

It is important to note that lightning can strike as far as 30 km from the center of a storm cell.

Sunday was anticipated to be another significant storm day, with very dangerous and severe thunderstorms expected across northeastern New South Wales, according to Sarah Scully, a senior meteorologist at the Bureau of Meteorology.

These powerful storms have the potential to produce hail exceeding 5 cm in diameter and wind gusts surpassing 120 km/h.

“This activity is being driven by a southerly change pushing up the New South Wales coast,” Scully explained. “This serves as a potential trigger for these high-end supercell thunderstorms.”

On Sunday, a broader area of New South Wales, extending from inland ranges east of Sydney up into southeastern and central Queensland, faced the threat of severe thunderstorms, 2 cm hail, wind gusts exceeding 90 km/h, heavy rainfall, and flash flooding.

While Sydney was expected to experience storms on Sunday, they were likely to be less severe than those further north, though rain remained probable. The city’s forecast top temperature was 23°C. In Brisbane, showers and thunderstorms were anticipated with a maximum temperature of 31°C.

The Bureau of Meteorology (BoM) anticipated issuing further severe weather warnings throughout Sunday as the storm systems developed.

On Monday, the risk of high-end severe thunderstorms is expected to shift toward the Northern Rivers region of New South Wales and southeastern Queensland, including Brisbane, the Gold Coast, and the Sunshine Coast. These storms could again bring giant hail, destructive winds, and intense rainfall capable of causing life-threatening flash flooding.

“This threat is again being driven by a coastal trough pushing up the coast, combined with the very humid conditions that eastern Australia has experienced over the past few days,” Scully noted.

A coastal trough accompanied by a low-pressure system appeared to be developing off the northern coast of New South Wales near the Queensland border, potentially bringing additional heavy rainfall to the coastal regions.

“The amount of rainfall that accumulates is highly dependent on how close this trough sits to the coast and how long it remains in place,” Scully explained.

“At this stage, we are only expecting moderate rainfall totals of 30 to 70 mm from the coastal trough, which should ease by Tuesday morning. However, we are monitoring the system very closely, as rainfall totals associated with coastal troughs are notoriously difficult to predict. If the system shifts even slightly closer to the coast, it could potentially dump significant amounts of rain.”

Elsewhere across the country, Melbourne was expected to see developing showers on Sunday with a forecast top of 17°C. Hobart had a high chance of showers with a temperature of 13°C, while Adelaide was forecast to be cloudy with a mild 20°C. Canberra was predicted to be partly cloudy with a top of 24°C, and Perth was expected to reach 28°C. Darwin was forecast to experience a top of 34°C along with afternoon storms.

Source link