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
12.0 mm
12:30pm 18/05/2026
12:45pm 18/05/2026
1 in 1.0 years
97.54 %
30m
19.0 mm
12:15pm 18/05/2026
12:45pm 18/05/2026
1 in 1.1 years
93.49 %
45m
24.0 mm
12:15pm 18/05/2026
1:00pm 18/05/2026
1 in 1.1 years
89.09 %
60m
26.0 mm
12:00pm 18/05/2026
1:00pm 18/05/2026
1 in 1.1 years
90.16 %
90m
33.0 mm
12:00pm 18/05/2026
1:30pm 18/05/2026
1 in 1.2 years
82.2 %
120m
37.0 mm
8:45am 18/05/2026
10:45am 18/05/2026
1 in 1.2 years
80.25 %
3h
51.0 mm
9:45am 18/05/2026
12:45pm 18/05/2026
1 in 1.6 years
63.84 %
4h
78.0 mm
8:45am 18/05/2026
1:15pm 18/05/2026
1 in 2.6 years
38.58 %
6h
91.0 mm
8:15am 18/05/2026
2:15pm 18/05/2026
1 in 2.8 years
36.25 %
9h
124.0 mm
5:30am 18/05/2026
2:30pm 18/05/2026
1 in 3.6 years
27.89 %
12h
138.0 mm
2:15am 18/05/2026
2:15pm 18/05/2026
1 in 3.3 years
30.35 %
18h
151.0 mm
8:30pm 17/05/2026
2:30pm 18/05/2026
1 in 2.6 years
38.78 %
24h
155.0 mm
2:30pm 17/05/2026
2:30pm 18/05/2026
1 in 2.0 years
50.0 %
30h
155.0 mm
8:30am 17/05/2026
2:30pm 18/05/2026
1 in 1.7 years
57.68 %
36h
155.0 mm
2:30am 17/05/2026
2:30pm 18/05/2026
1 in 1.6 years
63.95 %
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
