Evaluation of ensemble precipitation forecasts generated through post-processing in a Canadian catchment

Evaluation of ensemble precipitation forecasts generated through post-processing in a Canadian catchment

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Flooding in copyright is often caused by heavy rainfall during the snowmelt period.Hydrologic forecast centers rely on precipitation forecasts obtained from numerical weather prediction (NWP) models to enforce here hydrological models for streamflow forecasting.The uncertainties in raw quantitative precipitation forecasts (QPFs) are enhanced by physiography and orography effects over a diverse landscape, particularly in the western catchments of copyright.

A Bayesian post-processing approach called rainfall post-processing (RPP), developed in Australia (Robertson et al., 2013; Shrestha et al., 2015), has been applied to assess its forecast performance in a Canadian catchment.

Raw QPFs obtained iphone 13 dallas from two sources, Global Ensemble Forecasting System (GEFS) Reforecast 2 project, from the National Centers for Environmental Prediction, and Global Deterministic Forecast System (GDPS), from Environment and Climate Change copyright, are used in this study.The study period from January 2013 to December 2015 covered a major flood event in Calgary, Alberta, copyright.Post-processed results show that the RPP is able to remove the bias and reduce the errors of both GEFS and GDPS forecasts.

Ensembles generated from the RPP reliably quantify the forecast uncertainty.