Table 2 Standardized anomaly indices (SAI) values of extreme Climatic variables and Interpretation.

From: Spatiotemporal variability and trends in extreme rainfall and temperature indices in Southeastern Oromia, Ethiopia

SAI Range

Classification

Climate Extreme Interpretation

SAI ≤ −2.0

Extreme negative

Exceptionally low/extreme cold events

−2.0 < SAI ≤ −1.5

Severe negative

Severe deficit/cold conditions

−1.5 < SAI ≤ −1.0

Moderate negative

Moderately below normal

−1.0 < SAI < + 1.0

Near normal

Within typical variability range

+ 1.0 ≤ SAI < + 1.5

Moderate positive

Moderately above normal

+ 1.5 ≤ SAI < + 2.0

Severe positive

Severe excess/heat conditions

SAI ≥ + 2.0

Extreme positive

Exceptionally high/extreme heat events

  1. Source: WMO67; Lamb68.
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