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2:20pm 18/05/2026 to 2:20pm 20/05/2026
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
10m
1.4 mm
8:50pm 18/05/2026
9:00pm 18/05/2026
1 in 1 years
100.0 %
20m
2.2 mm
8:40pm 18/05/2026
9:00pm 18/05/2026
1 in 1 years
100.0 %
30m
2.8 mm
5:10am 19/05/2026
5:40am 19/05/2026
1 in 1 years
100.0 %
60m
4.0 mm
4:50am 19/05/2026
5:50am 19/05/2026
1 in 1 years
100.0 %
90m
4.8 mm
5:00am 19/05/2026
6:30am 19/05/2026
1 in 1 years
100.0 %
120m
6.0 mm
8:40pm 18/05/2026
10:40pm 18/05/2026
1 in 1 years
100.0 %
3h
6.8 mm
3:30am 19/05/2026
6:30am 19/05/2026
1 in 1 years
100.0 %
4h
7.6 mm
2:10am 19/05/2026
6:40am 19/05/2026
1 in 1 years
100.0 %
6h
9.2 mm
12:20am 19/05/2026
6:20am 19/05/2026
1 in 1 years
100.0 %
9h
14.4 mm
8:40pm 18/05/2026
5:40am 19/05/2026
1 in 1 years
100.0 %
12h
16.2 mm
6:30pm 18/05/2026
6:30am 19/05/2026
1 in 1 years
100.0 %
18h
16.2 mm
2:20pm 18/05/2026
8:20am 19/05/2026
1 in 1 years
100.0 %
24h
16.8 mm
4:30pm 18/05/2026
4:30pm 19/05/2026
1 in 1 years
100.0 %
30h
17.0 mm
2:20pm 18/05/2026
8:20pm 19/05/2026
1 in 1 years
100.0 %
36h
17.0 mm
2:20pm 18/05/2026
2:20am 20/05/2026
1 in 1 years
100.0 %
48h
17.0 mm
2:20pm 18/05/2026
2:20pm 20/05/2026
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.
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