Menu Close


Detailed Australian Hailstorm 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. Available on our Multi-Peril Workbench, HailAUS is now offered through the Oasis loss modelling framework and commercially via Nasdaq Risk Modelling for Catastrophes. HailAUS enables users unparalleled quantification of risk at the location and portfolio level, having full national coverage for property and motor insurance portfolios.

Results with Impact

HailAUS 7.1 uses Risk Frontiers’ own High Storm Potential Index to describe the probability of hailstorms nationwide. The model is built upon the Bureau of Meteorology’s radar network, internal archives of historical hazard events and our PerilAUS database, along with reanalysis climate variables. Hail footprints are elliptical with concentric levels of estimated hail size, with damage estimates calculated for each exposure within this ellipse. The model parameters account for the density of cars based on time of year, time of day, and the nature of the location (e.g. car parks for airports, universities, or major shopping centers) for loss estimation.
Figure 1: Expected Hail size for 100year Annual Return Interval (left) and relative Average Annual Loss (right) by postcode across Australia.

HailAUS Model Overview

Hazard Resolution


Exposure Resolution

Location Address Level

Event Catalogue

50,000 years, 90 million storms

Line of Business


Business Interruption



All Properties on mainland Australia and Tasmania. 100% GNAF

Post-Event Response Capabilities

Risk Frontiers has the ability to provide rapid damage estimates in the aftermath of a catastrophic hail event. Within 24 hours of an event, we are able to process radar data using peer-reviewed algorithms to determine event maximum expected hail size. Radar image processing techniques then produce the expected damage footprint for those estimated hail sizes and damage calculated against an exposed portfolio. Below is an example of the December 20th, 2018 Sydney hailstorm.
Figure 2: Mean Maximum Estimated Size of Hail from 02:00 to 10:00 UTC using the Wollongong Radar. White solid lines are postcode boundaries. Analysis used the second tilt (0.9 degrees from horizontal).
Figure 3: Storm footprints extracted from contours of mean Maximum Estimated Size of Hail algorithm output over the entire event. Dashed lines represent contour levels of 3cm diameter. The maximum predicted over the entire event was 10.4cm diameter hail.

For more information contact:

Dr Foster

Dr Salomé

Click here to download pdf version of the HailAUS flyer