A tropical cyclone is considered a tropical ... The category increases as a storm strengthens up the scale. If a hurricane receives a rating of Category 3, 4 or 5, it is considered a major hurricane.
Dunes are often the first line of defence when powerful storms — like the one Cyclone Alfred delivered ... To visualise the scale of this change, ABC News has mapped sections of the coastline ...
Tropical Cyclone Alfred is approaching Australia ... is forecasting Alfred will come ashore as a Level 1 of 5 storm on its scale, with winds roughly equivalent to a moderate tropical storm ...