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Probability of Exceedance and Occurrence

Description

Probability of exceedance and occurrence maps are criteria-based, probabilistic maps. Each map uses specific variable and time thresholds. For instance, the map above is a probability of exceeding 0.25 units of precipitation over a 6-hour period.

These maps are useful for quickly summarizing the probability of specific conditions of concern, such as whether temperatures will reach dangerously high levels or become low enough to threaten vegetation, or whether precipitation amounts could cause flooding.