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Table 3.

Recommended verification measures for deterministic forecasts of rare events (WMO 2014).

Mandatory Highly recommended Recommended
Hits Frequency bias (FB) Probability of false detection (POFD)
Misses Proportion correct (PC) Critical success index (CSI)
False alarms Probability of detection (POD) Peirce skill score (PSS)
Correct rejections False alarm ratio (FAR) Heidke skill score (HSS)
Equitable threat score (ETS) Odds ratio (OR)
Odds ratio skill score (ORSS)
Extremal dependence index (EDI)

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