SCDNR Climatology Office
Extreme Rainfall Events
Average Return Intervals
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Average Return Intervals
Statewide Average Return Interval (ARI) Maps
Select Storm Duration and ARI
Storm Duration
Duration
1 Hour
2 Hour
3 Hour
6 Hour
12 Hour
24 Hour
48 Hour
72 Hour
96 Hour
168 Hour
Return Interval
Return Interval
2 Years (50%)
5 Years (25%)
10 Years (10%)
25 Years (4%)
50 Years (2%)
100 Years (1%)
500 Years (0.2%)
1000 Years (0.1%)
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