Severe Tropical Cyclone Debbie was a category 4 system that made landfall near Airlie Beach on the north Queensland coast at midday on the 28th of March, 2017. As part of a continuing effort to better characterise wind fields that impact communities during severe wind events, the Cyclone Testing Station (CTS), with collaborators from the Wind Research Laboratory at The University of Queensland, deployed SWIRLnet (Surface Weather Relay and Logging Network) weather stations to the region prior to Debbie’s landfall. Six SWIRLnet towers (3.2 m high anemometers placed in the communities likely to be affected) collected data continuously prior to, during and after landfall. Three towers were deployed in the Ayr/Home Hill region, two in Bowen and one in Proserpine. In addition, the CTS deployed two Campbell Scientific CCFC Outdoor Field Cameras to capture images throughout the cyclone event.

Throughout the cyclone event, six SWIRLnet stations, supplied by Campbell Scientific Australia, recorded 10Hz wind speed data using Campbell Scientific CR1000 data loggers coupled with RM Young 05106 marine grade anemometers. Campbell Scientific CS215 temperature and relative humidity probes and Vaisala PTB110 barometric pressure sensors provided additional meteorological information, with 10-minute summaries of wind speed, temperature, relative humidity and pressure readings uploaded remotely via cellular connection during the cyclone.

A preliminary Severe Wind Hazard Assessment report released by the CTS was compiled within 48 hours of the cyclone event, from onsite and media sourced content by the engineering faculty and students at the Cyclone Testing Station (James Cook University), the University of Queensland and the University of Florida. The study compliments experimental research at these institutions seeking to characterise extreme wind events and their impact on buildings. The purpose of these rapid assessment reports is to provide a preliminary engineering assessment of severe weather events, within the first 24 to 48 hours.

A subsequent Technical Report (CTS Technical Report No 63) released by the CTS used data collected from the SWIRLnet stations and CCFC cameras to assist with the overall damage assessment study. Data from the SWIRLnet stations revealed the presence of local upwind site effects at some locations where towers were deployed. Detailed analysis of the SWIRLnet data for turbulence, gust intensity and duration, and changes with different upwind terrain that occurred during the cyclone is continuing in order to better understand cyclonic wind characteristics in the built environment. CTS Technical Report No. 63 is available from the publications section of the CTS website:
https://www.jcu.edu.au/cyclone-testing-station/publications


 Facebook

We're now on Facebook!

Stay informed with our latest updates by following Campbell Scientific Australia.

Case Study Summary

Application

Portable anemometer network for wind speed and measurements of land-falling tropical cyclones, to better characterise extreme wind events and their impact on buildings.

Location

North Queensland Coast

Products Used

CR1000  CS215-L  CCFC 

Contributors

David Henderson, Cyclone Testing Station

Measured Parameters

10Hz wind speed and direction, 1-second average wind speed, maximum 3-second wind speed during 10-minute period, 10 minute sample barometric pressure, 10-minute average, maximum and minimum Air Temperature and Relative Humidity.