0a3a127e-58bb-48d5-96cd-d4ca6321cd47 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-10-16T06:39:49 creation ISO 19115 2016 2018 National Tropical Cyclone Hazard Assessment 0a3a127e-58bb-48d5-96cd-d4ca6321cd47 The 2018 Tropical Cyclone Hazard Assessment (TCHA18) provides an evaluation of the likelihood and intensity (“how big and how often”) of the occurrence of tropical cyclone winds across the Australian region, covering mainland Australia, islands and adjacent waters. It is a probabilistic evaluation of the expected maximum gust wind speeds with a range of annual exceedance probabilities (or conversely, average recurrence intervals). The assessment is derived using a statistical-parametric model developed by Geoscience Australia called the Tropical Cyclone Risk Model (TCRM). Maximum 0.2-second duration, 10-metre above ground wind speeds are calculated for Standard Australia's AS/NZS 1170.2 (2011) terrain category 2 (0.02 m roughness length) surface conditions, over a 0.02 degree grid across Australia. Maps of average recurrence interval (ARI) wind speeds of 100- and 500-year ARI are provided in a separate product suite. {"type": "Polygon", "coordinates": [[[100.0, -35.0], [165.0, -35.0], [165.0, -5.0], [100.0, -5.0], [100.0, -35.0]]]} 100.0 165.0 -35.0 -5.0 HVC_144680 Published_External Tropical cyclone Link to website documentDigital Link to website HTML Download the document (pdf) documentDigital Download the document (pdf) PDF