This is the Windows app named ensemble-verification-system whose latest release can be downloaded as EVS_5.10.zip. It can be run online in the free hosting provider OnWorks for workstations.
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The Ensemble Verification System (EVS) is designed to verify ensemble forecasts of hydrologic and hydrometeorological variables, such as temperature, precipitation, and streamflow, issued at discrete forecast locations (points or areas).
- Pairing of observed and ensemble forecast values, which may be provided in a variety of file formats (e.g. XML, NetCDF, ASCII), to perform verification for a given forecast point or area.
- Computation of multiple verification metrics for arbitrary numeric forecast variables (e.g. precipitation, temperature, streamflow, river stage) at a single forecast point or area. The verification metrics are computed for each of the forecast lead times available.
- Verification metrics for the ensemble average (mean, median, mode) include: correlation coefficient; mean error; relative mean error; root mean square error; and mean absolute error.
- Verification metrics for the ensemble and associated probabilities include: Brier Score and decompositions; Continuous Ranked Probability Score and decompositions; Brier Skill Score; Continuous Ranked Probability Skill Score; Reliability Diagram; Rank Histogram; Relative Operating Characteristic; and Relative Operating Characteristic score.
- Conditional verification based on time (e.g. season; forecast initialization time; forecast lead time) and variable values (e.g. thresholds of the observed or forecast variables or related variables).
- Generation of confidence intervals for the verification metrics through bootstrap resampling of the verification pairs (stationary block bootstrap).
- Aggregation in time and space to establish aggregate quality over longer periods and larger areas.
- Generation of graphical and numerical outputs, which can be displayed in an internal viewer and exported in a variety of file formats (e.g. PNG, JPEG, SVG).
- Connectivity to the R environment for statistical computing.
This is an application that can also be fetched from https://sourceforge.net/projects/ensemble-verification-system/. It has been hosted in OnWorks in order to be run online in an easiest way from one of our free Operative Systems.