Table 1 Classification of dry and wet conditions indicated by SPEI.
From: The first global multi-timescale daily SPEI dataset from 1982 to 2021
SPEI | Climate condition |
|---|---|
SPEI ≥ 2.0 | Extremely wet |
1.5 ≤ SPEI < 2.0 | Severely wet |
1.0 ≤ SPEI < 1.5 | Moderately wet |
0.5 < SPEI < 1.0 | Mildly wet |
−0.5 ≤ SPEI ≤ 0.5 | Normal |
−1.0 < SPEI < −0.5 | Mildly dry |
−1.5 < SPEI ≤ −1.0 | Moderately dry |
−2.0 < SPEI ≤ −1.5 | Severely dry |
SPEI ≤ −2.0 | Extremely dry |
