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Journal of Southern Hemisphere Earth Systems Science Journal of Southern Hemisphere Earth Systems Science SocietyJournal of Southern Hemisphere Earth Systems Science Society
A journal for meteorology, climate, oceanography, hydrology and space weather focused on the southern hemisphere
RESEARCH ARTICLE (Open Access)

Why are Temperature Forecasts from the Australian Digital Forecast Database Poorer on Summer Afternoons?

C. Bridge

Australian Meteorological and Oceanographic Journal 65(2) 176 - 194
Published: 2015

Abstract

Temperature forecast grids from the Australian Digital Forecast Database have been routinely verified since 2013. It was noted that forecast accuracy, determined using root mean square error (RMSE), tends to be poorer for summer afternoon forecasts for each Australian state. Temperature forecast grids for Western Australia were examined to investigate possible reasons behind the reduced accuracy. A suspected flaw in the verification process was confirmed and was found to slightly increase RMSE. Increases in summer afternoon forecast errors associated with coastal sea breezes and rainfall together with systematic bias were also identified as contributory factors to the increased RMSE. In view of these findings, a number of refinements to the verification process are proposed with the aim of improving future forecast accuracy.

https://doi.org/10.1071/ES15013

© Commonwealth of Australia represented by the Bureau of Meterology 2015. This is an open access article distributed under the Creative Commons Attribution-NonCommerical-NoDerivatives 4.0 International License (CC BY-NC-ND).

Committee on Publication Ethics

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