Dark mode
Light mode 7:30am 11/07/2026 to 7:30am 13/07/2026
You can find out more about Design Rainfall and IFD here.
Observations for this analysis :
Maximum observed rainfall by duration, estimated return period and AEP
Duration
Rainfall
Start
End
Years
AEP
15m
6.0 mm
8:15pm 11/07/2026
8:30pm 11/07/2026
1 in 1.1 years
91.75 %
30m
9.8 mm
8:00pm 11/07/2026
8:30pm 11/07/2026
1 in 1.4 years
71.98 %
45m
13.6 mm
8:00pm 11/07/2026
8:45pm 11/07/2026
1 in 2.0 years
51.04 %
60m
16.4 mm
7:45pm 11/07/2026
8:45pm 11/07/2026
1 in 2.2 years
44.8 %
90m
21.6 mm
7:45pm 11/07/2026
9:15pm 11/07/2026
1 in 3.1 years
32.75 %
120m
26.2 mm
7:30pm 11/07/2026
9:30pm 11/07/2026
1 in 4.2 years
23.92 %
3h
30.8 mm
7:30pm 11/07/2026
10:30pm 11/07/2026
1 in 3.3 years
30.11 %
4h
33.0 mm
6:00pm 11/07/2026
10:30pm 11/07/2026
1 in 2.0 years
49.65 %
6h
34.2 mm
4:45pm 11/07/2026
10:45pm 11/07/2026
1 in 1.4 years
69.53 %
9h
35.8 mm
5:00pm 11/07/2026
2:00am 12/07/2026
1 in 1.1 years
94.15 %
12h
39.8 mm
6:15pm 11/07/2026
6:15am 12/07/2026
1 in 1.0 years
96.73 %
18h
50.0 mm
5:00pm 11/07/2026
11:00am 12/07/2026
1 in 1.0 years
95.91 %
24h
61.4 mm
7:30pm 11/07/2026
7:30pm 12/07/2026
1 in 1.1 years
91.38 %
30h
74.8 mm
5:00pm 11/07/2026
11:00pm 12/07/2026
1 in 1.2 years
80.63 %
36h
86.2 mm
5:45pm 11/07/2026
5:45am 13/07/2026
1 in 1.4 years
71.89 %
Note: A '1 in 1.0 years' estimate means that it is almost certain to occur at least once in a year, and could occur much more than once per year on average. For smaller values like this the Annual Recurrance Interval (ARI) may be of more relevance, but it is complex to calculate for common events.
Install
