Title

Dual-doppler radar, in situ anemometric and ground damage observations of the 27 November 2014 Brisbane Supercell

Document Type

Conference Proceeding

Publication Date

1-1-2017

Publication Title

2017 Americas Conference on Wind Engineering, ACWE 2017

Keywords

Automatic weather station, Damage survey, Doppler radar, Supercell, Thunderstorm outflow, Wind profiles

Abstract

The primary aims of this study were to characterize the three-dimensional wind structure of the supercell that impacted Brisbane on 27 November 2014 and compare available Doppler radar data with near-surface in situ wind histories and ground-based damage survey data. Single- and dual-Doppler radar data show that the storm downdraft impacted the Archerfield Airport automatic weather station (AWS), which recorded peak one-minute mean and maximum three-second gust wind speeds of 31.4 ms-1 and 39.2 ms-1 respectively. After passing through Arch-erfield, the storm evolved into a supercell, but produced weaker wind speeds at the Brisbane AWS. Dual-Doppler radar horizontal wind profiles above the AWSs evolved from synoptic boundary layer wind profiles into thunderstorm outflow wind profiles that varied spatially and temporally. Most of the wind damage observed after the event was around Archerfield, while hail damage was observed across the entire study region.

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