Sydney weather: Thunderstorms set to brew each afternoon for the next week

Lots of stormy afternoons are expected over the coming week. Severe thunderstorms are in prospect for each day until early next week for a wide swathe of the NSW coast.

The Bureau of Meteorology issued a warning on Monday afternoon for large hailstones, heavy rainfall and damaging winds for a region stretching from Wollongong north to the Queensland border.

However, the bureau later updated the alert to exclude the Sydney region, restricting the warning area to towns such as Lismore, Grafton, Tenterfield, Kyogle, Dorrigo and parts in between. It also dropped the alert for damaging winds.

Hailstones with a diameter of as much as 3 centimetres were reported in the Hawkesbury region during the afternoon storm.

Zach Porter, a duty forecaster for the bureau in Sydney, said any storm activity would will likely decay pretty quickly by sundown. “[These storms] will need the heat of the day to keep energised,” he said.

Mr Porter said the storms are being fed by a large trough lying over the region and drawing warm, moist air southwards from the tropics.

That set-up is slow-moving and may not break down until early next week, he said. Pollen and asthma

According to Weatherzone, the pollen count for Sydney is rated “extreme” on Monday. Other days over the coming week have a high or very high rating.

Concerns about the risk of thunderstorms worsening allergies or other breathing ailments have been heightened by the deaths of six people – and hospitalisation of many more – in the wake of a major storm last week in Melbourne.

Health officials in NSW, though, say they aren’t worried about a spate of so-called thunderstorm asthma occurring in Sydney.

They monitor respiratory admissions and can spot spikes in cases, but the city has not had a thunderstorm asthma event and is not likely to. The threat is higher in the Riverina, in places such as Wagga Wagga, where health authorities monitor conditions closely.

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This story Administrator ready to work first appeared on Nanjing Night Net.

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