8:15pm 04/05/2026 to 8:15pm 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
5.0 mm
1:15am 05/05/2026
1:30am 05/05/2026
1 in 1.0 years
96.68 %
30m
9.2 mm
1:00am 05/05/2026
1:30am 05/05/2026
1 in 1.3 years
77.62 %
45m
10.4 mm
12:45am 05/05/2026
1:30am 05/05/2026
1 in 1.2 years
86.47 %
60m
11.0 mm
12:30am 05/05/2026
1:30am 05/05/2026
1 in 1.1 years
91.75 %
90m
17.6 mm
12:00am 05/05/2026
1:30am 05/05/2026
1 in 1.6 years
63.21 %
120m
18.2 mm
12:00am 05/05/2026
2:00am 05/05/2026
1 in 1.4 years
73.7 %
3h
19.6 mm
11:00pm 04/05/2026
2:00am 05/05/2026
1 in 1.1 years
87.48 %
4h
22.2 mm
9:15pm 04/05/2026
1:45am 05/05/2026
1 in 1.1 years
91.43 %
6h
22.4 mm
8:30pm 04/05/2026
2:30am 05/05/2026
1 in 1.0 years
96.89 %
9h
22.4 mm
8:30pm 04/05/2026
5:30am 05/05/2026
1 in 1.0 years
99.34 %
12h
22.4 mm
8:30pm 04/05/2026
8:30am 05/05/2026
1 in 1.0 years
99.88 %
18h
22.4 mm
8:30pm 04/05/2026
2:30pm 05/05/2026
1 in 1 years
100.0 %
24h
22.4 mm
8:30pm 04/05/2026
8:30pm 05/05/2026
1 in 1 years
100.0 %
30h
22.6 mm
8:30pm 04/05/2026
2:30am 06/05/2026
1 in 1 years
100.0 %
36h
22.6 mm
8:30pm 04/05/2026
8:30am 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.