Cumulative Effect of Precipitation Deficit Preceding Severe Droughts in Southwestern and Southern China

Table 1

Categories of the severity of drought as indicated by the index.

Category	Degree of severity	Percentile chance (%)
1	No drought	>30
2	Incipient	15 to ≤30
3	Moderate	5 to ≤15
4	Severe	2 to ≤5
5	Extreme	≤2