4:00am 26/05/2026 to 4:00am 28/05/2026
Maximum observed rainfall by duration, estimated return period and AEP
Duration
Rainfall
Start
End
Years
AEP
15m
13.5 mm
1:45am 28/05/2026
2:00am 28/05/2026
1 in 1.2 years
86.85 %
30m
26.5 mm
1:45am 28/05/2026
2:15am 28/05/2026
1 in 2.0 years
51.28 %
45m
28.5 mm
1:45am 28/05/2026
2:30am 28/05/2026
1 in 1.7 years
59.16 %
60m
30.0 mm
1:30am 28/05/2026
2:30am 28/05/2026
1 in 1.6 years
64.02 %
90m
32.0 mm
1:15am 28/05/2026
2:45am 28/05/2026
1 in 1.4 years
70.22 %
120m
32.5 mm
1:00am 28/05/2026
3:00am 28/05/2026
1 in 1.3 years
77.68 %
3h
34.5 mm
11:45pm 27/05/2026
2:45am 28/05/2026
1 in 1.2 years
85.54 %
4h
39.5 mm
10:15pm 27/05/2026
2:45am 28/05/2026
1 in 1.2 years
86.59 %
6h
40.5 mm
8:30pm 27/05/2026
2:30am 28/05/2026
1 in 1.1 years
90.65 %
9h
51.0 mm
6:30pm 27/05/2026
3:30am 28/05/2026
1 in 1.1 years
87.1 %
12h
51.0 mm
3:30pm 27/05/2026
3:30am 28/05/2026
1 in 1.1 years
92.58 %
18h
54.0 mm
9:30am 27/05/2026
3:30am 28/05/2026
1 in 1.0 years
96.17 %
24h
54.0 mm
3:30am 27/05/2026
3:30am 28/05/2026
1 in 1.0 years
98.29 %
30h
54.0 mm
9:00pm 26/05/2026
3:00am 28/05/2026
1 in 1.0 years
98.81 %
36h
55.5 mm
3:30pm 26/05/2026
3:30am 28/05/2026
1 in 1.0 years
99.03 %
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.

