4:15pm 17/01/2026 to 4:15pm 19/01/2026
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
17.0 mm
3:15pm 18/01/2026
3:30pm 18/01/2026
1 in 1.7 years
59.62 %
30m
27.0 mm
3:15pm 18/01/2026
3:45pm 18/01/2026
1 in 2.4 years
42.03 %
45m
31.0 mm
3:00pm 18/01/2026
3:45pm 18/01/2026
1 in 2.4 years
42.4 %
60m
35.0 mm
3:00pm 18/01/2026
4:00pm 18/01/2026
1 in 2.5 years
40.13 %
90m
38.0 mm
2:30pm 18/01/2026
4:00pm 18/01/2026
1 in 2.2 years
45.57 %
120m
50.0 mm
2:00pm 18/01/2026
4:00pm 18/01/2026
1 in 3.6 years
27.76 %
3h
52.0 mm
1:30pm 18/01/2026
4:30pm 18/01/2026
1 in 2.4 years
41.31 %
4h
62.0 mm
12:00pm 18/01/2026
4:30pm 18/01/2026
1 in 2.3 years
42.61 %
6h
67.0 mm
2:00pm 18/01/2026
8:00pm 18/01/2026
1 in 2.0 years
50.15 %
9h
81.0 mm
12:15pm 18/01/2026
9:15pm 18/01/2026
1 in 1.9 years
53.77 %
12h
86.0 mm
11:00am 18/01/2026
11:00pm 18/01/2026
1 in 1.5 years
65.04 %
18h
99.0 mm
2:00am 18/01/2026
8:00pm 18/01/2026
1 in 1.4 years
72.52 %
24h
110.0 mm
11:00pm 17/01/2026
11:00pm 18/01/2026
1 in 1.3 years
77.24 %
30h
111.0 mm
5:00pm 17/01/2026
11:00pm 18/01/2026
1 in 1.2 years
86.85 %
36h
113.0 mm
12:00am 18/01/2026
12:00pm 19/01/2026
1 in 1.1 years
89.67 %
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.