Dark mode
Light mode 2:45pm 16/05/2026 to 2:45pm 18/05/2026
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
14.0 mm
1:00pm 18/05/2026
1:15pm 18/05/2026
1 in 1.1 years
92.57 %
30m
22.0 mm
12:45pm 18/05/2026
1:15pm 18/05/2026
1 in 1.2 years
84.75 %
45m
27.0 mm
12:30pm 18/05/2026
1:15pm 18/05/2026
1 in 1.3 years
79.21 %
60m
32.0 mm
12:15pm 18/05/2026
1:15pm 18/05/2026
1 in 1.4 years
72.48 %
90m
44.0 mm
11:45am 18/05/2026
1:15pm 18/05/2026
1 in 1.8 years
55.19 %
120m
51.0 mm
11:15am 18/05/2026
1:15pm 18/05/2026
1 in 1.9 years
51.98 %
3h
72.0 mm
11:30am 18/05/2026
2:30pm 18/05/2026
1 in 2.8 years
35.14 %
4h
85.0 mm
10:00am 18/05/2026
2:30pm 18/05/2026
1 in 2.7 years
37.66 %
6h
95.0 mm
8:30am 18/05/2026
2:30pm 18/05/2026
1 in 2.5 years
40.7 %
9h
122.0 mm
5:15am 18/05/2026
2:15pm 18/05/2026
1 in 2.7 years
37.21 %
12h
164.0 mm
2:45am 18/05/2026
2:45pm 18/05/2026
1 in 3.6 years
27.5 %
18h
174.0 mm
8:45pm 17/05/2026
2:45pm 18/05/2026
1 in 2.6 years
38.87 %
24h
174.0 mm
2:45pm 17/05/2026
2:45pm 18/05/2026
1 in 1.9 years
52.72 %
30h
174.0 mm
8:45am 17/05/2026
2:45pm 18/05/2026
1 in 1.6 years
61.24 %
36h
175.0 mm
2:45am 17/05/2026
2:45pm 18/05/2026
1 in 1.5 years
66.56 %
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
