Tropical Cyclone Alfred facts & stats
In the first week of March, Australia’s east coast was pounded by rain, wind and surf swells, with some of the highest rainfall in decades recorded through South-East Queensland, including Brisbane’s highest daily rainfall in half a century.
A 12.3-metre wave on the Gold Coast – the highest recorded in 38 years of measurement – was the main attraction for locals and tourists eager to experience the epic swell and post it on their social media, despite warnings from SES and authorities.
Over 450,000 properties, stretching from the Fraser Coast to the New South Wales border, lost power due to the historic weather system, marking the largest number of power outages in Queensland’s history caused by a natural disaster.
Brisbane recorded its heaviest rainfall since Cyclone Wanda in 1974, with significant totals across the region since 9am Wednesday. Kangaroo Point saw 471mm, Brisbane Airport 355mm and Coolangatta recorded 487mm.
Unlike the usual storm events, Tropical Cyclone Alfred proved erratic as it swirled and meandered over the Coral Sea fed by the region’s warm waters. Its movements were made even more complicated by the new moon 28 February, which created extra-high high tides.
On 20 February, a tropical low was noted by the Australian Bureau of Meteorology (BOM) in the Coral Sea. The disturbance, initially designated by the agency as Tropical Low 22U, was expected to develop into a tropical cyclone over the next several days.
Two days later, the Joint Typhoon Warning Center (JTWC), which unofficially monitors all tropical cyclone basins, including the Australian region, upgraded the system to a tropical storm on the Saffir–Simpson scale (SSHWS). At 16:20 AEST, BOM upgraded the system to a category 1, with the name Tropical Cyclone Alfred assigned to it.
Over the next couple of days, the storm continued to move to the east and was upgraded to a category 2 tropical cyclone on the Australian scale at 16:00 AEST on 24 February.
Its designation fluctuated between categories 3 and 4 by 1 March, before further weakening down to a category 1 the following day. As it hovered off the coast, it was deemed category 1 and then category 2 for the next three days, before making landfall 7 March on Moreton Island, with winds of 75 km/h (45 mph). By 06:45 AEST on 8 March, Alfred was downgraded to a tropical low before crossing the mainland.
The cyclone hit southern Queensland and northern New South Wales, which are not in the tropics, while generally such cyclones occur within the tropical zone. Climate scientists warn that these types of “out-of-zone cyclones” are likely to become more frequent due to climate change.
An “insurance catastrophe” has been declared for southeast Queensland and northern New South Wales, triggering priority treatment for affected policyholders and triaging to ensure those hardest hit receive urgent assistance.
It is still too early to say if insurance premiums will rise following the extreme weather event but the Insurance Council of Australia has stated that the increasing frequency and severity of natural disasters was increasing costs for customers.
Continuing later into the week, MSQ has warned boaties to reconsider the need to go out on the water, stressing “Non-essential boating puts lives at risk”.
“To ensure your safety, our Maritime Safety Queensland response crews are working hard to assess waterways for damage and changed conditions. After a significant weather event like this, we expect debris and hazards – there will be submerged and floating objects that may pose a risk to navigation.
“For the most current information regarding access to pilotage areas and waterways, always visit qldmaritime.msq.qld.gov.au.”