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Severe thunderstorm, large hail and heavy rainfall hit southeastern Australia

nsw-queensland-storm-october-2018

Intense thunderstorms are affecting parts of southeastern Australia over the past couple of days. In just 24 hours, NSW registered 300 000 lightning strikes, resulting in the death of at least one person. Heavy rain soaked the region, dropping three times the October average rainfall on some parts. The storm flooded roads and homes, downed trees and power lines and left tens of thousands without power.

A strong cold front moved through New South Wales late October 20 into 21, 2018, forcing a warm and humid airmass upward, creating a line of storms that, at times, stretched from the Victorian border all the way to southern Queensland, the WeatherZone reports. The state saw 300 000 lightning strikes on October 21 alone.

The city of Sydney recorded more than 7 000 lightning strikes overnight October 21 and 15 mm (0.59 inches) of rain in 10 minutes / 19.2 mm (0.75 inches) in just 15 minutes.

State's SES said it received more than 200 calls for help, mostly due to downed trees and localized flooding, adding that it rescued two people from the floodwaters.

Hornsby picked up the highest total rainfall from the storms with 28 mm (1.10 inches), Wahroonga 25 mm (0.98 inches), Sydney Airport 21 mm (0.82 inches), Randwick 20 mm (1.18 inches), Marrickville 18 mm (0.70 inches) and Avalon 16 mm (0.63 inches).

The highest recorded wind gust in the Sydney basin was 72 km/h (45 mph) at Sydney Airport.

A drop of 5 °C (9 °F) was recorded at the same weather station in just 11 minutes.

One person was killed after being struck by a lightning at Comobella Road at Guerie, near Dumbo.

The storms also affected parts of Victoria and Queensland with some areas of Queensland recording more than 56 mm (2.20 inches) in just 30 minutes and wind gusts up to 106 km/h (66 mph).

Up to golf-ball-sized hail was reported in NSW and Queensland. The worst damage was reported northeast of Boonah and Aspley.

Some parts of southern Western Australia, eastern NSW and northern Queensland have already received up three to times their average October rainfall.

Kalgoorlie, WA has already recorded 66 mm (2.59 inches) of rain this month, making it their wettest month since early 2017. The city registered 2.8 mm (0.11 inches) of rain during entire September.

Burketown, Queensland registered 59 mm (2.3 inches) this week, more than four times the October monthly. This is the area's wettest October since the 1970's.

Lismore, NSW received a total of 225 mm (8.8 inches) of rain as of early October 19, making it its wettest October since 2011. Its long-term October average is 73 mm (2.87 inches).

As of 11:00 UTC on October 22, a Severe Thunderstorm Warning is in effect for parts of Capricornia Forecast District, Queensland. Marine Wind Warnings are in effect in Western Australia, South Australia, NSW and ACT, Victoria and Tasmania.

Featured image: Sydney storm on October 21, 2018. Credit: MC D

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4 Comments

  1. Why is EVERY weather event severe,record-breaking,catastrophic,unprecedented,etc?!Could it just be that this is a NORMAL seasonal rainfall…,instead of using hyperbole for everything that happens??!!

  2. 1652 flood of Noars day + 2018 = 3670÷70=52 weeks of jubilee years will indeed end at midnight October 31st and November 1st 2018 if this calculation is correct then the saints will come marching in to a new world! After this one is finished with.

  3. So what: “more than four times the October average”, “up three to times their average October rainfall”? What are the averages in each of these places? Nothing is particularly noteworthy about many of these events. They are but part and parcel of such places.

    In some areas it might be well to consider the likely comparisons with, say, 1916 and 1917—they were wet, so much so that in South Australia the median rainfall differs significantly from the average.

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