9:30pm 04/05/2026 to 9:30pm 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
32.0 mm
7:00pm 06/05/2026
7:15pm 06/05/2026
1 in 8.2 years
12.18 %
30m
63.0 mm
7:00pm 06/05/2026
7:30pm 06/05/2026
1 in 52.8 years
1.89 %
45m
63.0 mm
6:45pm 06/05/2026
7:30pm 06/05/2026
1 in 21.7 years
4.6 %
60m
63.0 mm
6:30pm 06/05/2026
7:30pm 06/05/2026
1 in 13.8 years
7.24 %
90m
63.0 mm
6:00pm 06/05/2026
7:30pm 06/05/2026
1 in 8.5 years
11.75 %
120m
83.0 mm
7:00pm 06/05/2026
9:00pm 06/05/2026
1 in 23.4 years
4.27 %
3h
83.0 mm
6:00pm 06/05/2026
9:00pm 06/05/2026
1 in 15.2 years
6.57 %
4h
83.0 mm
4:30pm 06/05/2026
9:00pm 06/05/2026
1 in 10.5 years
9.54 %
6h
83.0 mm
3:00pm 06/05/2026
9:00pm 06/05/2026
1 in 8.4 years
11.9 %
9h
83.0 mm
12:00pm 06/05/2026
9:00pm 06/05/2026
1 in 6.1 years
16.29 %
12h
83.0 mm
9:00am 06/05/2026
9:00pm 06/05/2026
1 in 4.8 years
20.73 %
18h
83.0 mm
3:00am 06/05/2026
9:00pm 06/05/2026
1 in 3.6 years
27.8 %
24h
83.0 mm
9:00pm 05/05/2026
9:00pm 06/05/2026
1 in 2.9 years
34.5 %
30h
83.0 mm
3:00pm 05/05/2026
9:00pm 06/05/2026
1 in 2.5 years
40.54 %
36h
83.0 mm
9:00am 05/05/2026
9:00pm 06/05/2026
1 in 2.2 years
44.65 %
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.