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Detailed Australian Tropical Cyclone Loss Model

Intelligently Designed. Location and Portfolio Level Intelligence

For 25 years, Risk Frontiers has been leading the development of natural catastrophe models for the Asia-Pacific region. CyclAUS is Risk Frontiers’ tropical cyclone wind loss model, built with our extensive expertise and local knowledge of tropical cyclone risk in the region. Carefully calibrated and representing 16 years of development, CyclAUS has coverage of all tropical cyclone affected regions in Australia.
Detailed what-if? scenario analysis, showing a synthetic event drawn from the CyclAUS catalogue representing a direct landfall of a Category 4 cyclone at Brisbane and address-level loss information.

Comprehensive Domain, Long Simulation

The CyclAUS modelling domain extends some 600 km seaward from the coast of Australia covering all tropical cyclone affected areas between Coffs Harbour, NSW, on the east coast to Augusta, WA, on the west. The generous extent of the domain and the exceptional length of the simulation (50,000 years) allow for the modelling of extremely infrequent events potentially impacting on populated regions in Southern WA and South-East QLD / Northern NSW. These regions are particularly vulnerable because of the lower building code standards than further north.
The generous extent of the CyclAUS model domain containing more than 350,000 synthetic cyclone events.

CyclAUS Model Overview

Hazard Resolution

Variable resolution, down to 90 mt

Exposure Resolution

Location Address Level

Event Catalogue

50,000 years of stochastic tropical cyclones

Wind and Exposure Parameters

Local gust wind speed at 10 mt elevation (3 s average), wind regions, building age, building height.

Line of Business

Residential / Commercial / Industrial

Business Interruption

Commercial / Industrial


All Properties on mainland Australia and Tasmania. 100% GNAF / Geoscape / Geovision

Resolution Where Needed Most

CyclAUS boasts an extremely high spatial resolution, able to resolve the steep gradients in wind speed as the cyclones move inland as well as the local terrain conditions. The wind speed is calculated every 15 minutes on Risk Frontiers’ Variable Resolution Grid (VRG), refined with increasing exposure and proximity to the coastline. Cells have a minimum size of 90 m and maximum of 23 km which reduces to 5.8 km within 150 km of the coastline. This ensures the resolution is highest where most needed. Adjustments for surface roughness change and topographic effects on wind speed are also modelled at a 90 m resolution.
Risk Frontiers’ Variable Resolution Grid (VRG) providing granularity where needed most.

Bespoke Climate Analyses

Risk Frontiers is implementing a catastrophe loss modelling solution to enable business and community leaders to better understand their exposure to future climate scenarios. In CyclAUS, the change in frequency of occurrence for events of different intensities and locations under a range of climate scenarios and time horizons are modelled. This allows us to estimate the change in losses on any portfolio at different points into the future and under different RCPs at a postcode, cresta or location level. We presently offer a future view of cyclone risk in Australia for 2030s, 2050s and 2090s, under a low, middle and high-emissions scenarios.

Location Level Intelligence