We break down why this index helps to more accurately quantify whether a given tropical season was more active than usual.

According to the NHC, PTC is the definition used for systems forecast to become tropical cyclones with the potential to impact areas within 48 hours of when watches and warnings are typically issued.

Ex-Tropical Cyclone Alfred has brought destructive winds, localised flooding and significant rainfall to parts of south-east Queensland and northern NSW. Some parts of the east coast have received ...

A tropical low is likely to form by Friday about 500 kilometres off WA's north coast, moving slowly towards the state in the coming days, with possible cyclone development. The Bureau of ...