Australia's Bureau of Meteorology (BOM) expects the country to experience 11 tropical storms over the next few months, threatening the country's mineral-rich Pilbara region and coal infrastructure in Queensland.
The number of storms is in line with historical averages, but BOM warns that rising ocean temperatures could increase their severity.
The state weather agency believes that four of these storms will make landfall from late December, and that a La Nina event could start later this year, although it may not last very long. La Nina events are associated with high levels of cyclonic activity.
BOM's forecasts suggest that five of the storms are likely to form around Western Australia's mineral-rich Pilbara region, which houses more than 40 operating iron ore mines and two lithium mines. Over the last three months, sea surface temperatures around Pilbara have exceeded historical averages by 1.2–2°C, warming more than in any of the country's other cyclone-prone regions.
On the other side of the country, four tropical storms could form around Queensland's cattle and coking coal producing regions, although these are likely to be less severe than the Pilbara storms. Temperatures across most of Queensland are forecast to exceed historical averages by 0.4–1.2°C in October-December.
Cyclonic weather in Pilbara could disrupt iron shipping and mining activity in the region. Australia's three largest iron export ports sit along the region's coast. In 2019, Cyclone Veronica forced the closure of Pilbara's three major ports and multiple mines operated by mining company Rio Tinto, prompting the firm to cut its production forecasts for the year.
Harsh storms in Queensland have previously damaged vital coal transport links in the state, hampering exports. In 2017, Cyclone Debbie damaged rail lines linking coal mines to the ports of Gladstone, Hay Point, Dalrymple Bay, and Abbott Point, which handle most of the state's coking coal exports. More recently, severe weather also halted deliveries to Mackay port.
Queensland and Pilbara are also home to major LNG terminals at Dampier and Gladstone ports that sit within cyclone-prone zones. The two terminals together export over 3mn t/month of LNG.
