Stormwater Manual - Pima County Flood Control District

10-YEAR – 24-HOUR RAINFALL DISTRIBUTION
Hours
10-year Cumulative
Rainfall (Inches)
Hours
10-year
Cumulative
Rainfall (Inches)
0.0 0.00 12.5 3.21
0.5 0.02 13.0 3.38
1.0 0.05 13.5 3.49
1.5 0.07 14.0 3.58
2.0 0.10 14.5 3.66
2.5 0.12 15.0 3.73
3.0 0.15 15.5 3.79
3.5 0.18 16.0 3.85
4.0 0.21 16.5 3.90
4.5 0.24 17.0 3.94
5.0 0.28 17.5 3.98
5.5 0.31 18.0 4.02
6.0 0.35 18.5 4.06
6.5 0.39 19.0 4.10
7.0 0.43 19.5 4.13
7.5 0.48 20.0 4.16
8.0 0.53 20.5 4.19
8.5 0.58 21.0 4.22
9.0 0.64 21.5 4.25
9.5 0.71 22.0 4.27
10.0 0.79 22.5 4.30
10.5 0.89 23.0 4.32
11.0 1.03 23.5 4.35
11.5 1.24 24.0 4.37
12.0 2.90
STORMWATER MANUAL 5-A-3 January 1, 2009
LEXINGTON-FAYETTE CO., KY.