6:45pm 04/05/2026 to 6:45pm 06/05/2026
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
10.0 mm
9:45pm 05/05/2026
10:00pm 05/05/2026
1 in 1.0 years
97.8 %
30m
15.0 mm
9:30pm 05/05/2026
10:00pm 05/05/2026
1 in 1.0 years
95.86 %
45m
20.0 mm
9:30pm 05/05/2026
10:15pm 05/05/2026
1 in 1.1 years
89.96 %
60m
21.0 mm
9:15pm 05/05/2026
10:15pm 05/05/2026
1 in 1.1 years
91.83 %
90m
22.0 mm
9:00pm 05/05/2026
10:30pm 05/05/2026
1 in 1.1 years
95.12 %
120m
23.0 mm
9:30pm 05/05/2026
11:30pm 05/05/2026
1 in 1.0 years
95.66 %
3h
25.0 mm
8:45pm 05/05/2026
11:45pm 05/05/2026
1 in 1.0 years
96.04 %
4h
26.0 mm
8:30pm 05/05/2026
1:00am 06/05/2026
1 in 1.0 years
97.39 %
6h
26.0 mm
7:00pm 05/05/2026
1:00am 06/05/2026
1 in 1.0 years
98.43 %
9h
26.0 mm
4:00pm 05/05/2026
1:00am 06/05/2026
1 in 1.0 years
99.17 %
12h
26.0 mm
1:00pm 05/05/2026
1:00am 06/05/2026
1 in 1.0 years
99.73 %
18h
26.0 mm
7:00am 05/05/2026
1:00am 06/05/2026
1 in 1.0 years
99.93 %
24h
26.0 mm
1:00am 05/05/2026
1:00am 06/05/2026
1 in 1 years
100.0 %
30h
26.0 mm
7:00pm 04/05/2026
1:00am 06/05/2026
1 in 1 years
100.0 %
36h
26.0 mm
7:00pm 04/05/2026
7:00am 06/05/2026
1 in 1 years
100.0 %
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.