2:30pm 17/01/2026 to 2:30pm 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
21.0 mm
5:30pm 17/01/2026
5:45pm 17/01/2026
1 in 1.8 years
56.75 %
30m
32.0 mm
5:15pm 17/01/2026
5:45pm 17/01/2026
1 in 1.9 years
53.68 %
45m
33.0 mm
5:15pm 17/01/2026
6:00pm 17/01/2026
1 in 1.5 years
68.58 %
60m
35.0 mm
5:15pm 17/01/2026
6:15pm 17/01/2026
1 in 1.4 years
73.27 %
90m
36.0 mm
5:15pm 17/01/2026
6:45pm 17/01/2026
1 in 1.2 years
82.96 %
120m
36.0 mm
4:45pm 17/01/2026
6:45pm 17/01/2026
1 in 1.1 years
88.18 %
3h
38.0 mm
5:15pm 17/01/2026
8:15pm 17/01/2026
1 in 1.1 years
90.41 %
4h
38.0 mm
3:45pm 17/01/2026
8:15pm 17/01/2026
1 in 1.1 years
94.12 %
6h
39.0 mm
4:30pm 17/01/2026
10:30pm 17/01/2026
1 in 1.0 years
95.4 %
9h
39.0 mm
2:45pm 17/01/2026
11:45pm 17/01/2026
1 in 1.0 years
97.0 %
12h
39.0 mm
2:45pm 17/01/2026
2:45am 18/01/2026
1 in 1.0 years
98.2 %
18h
39.0 mm
2:45pm 17/01/2026
8:45am 18/01/2026
1 in 1.0 years
98.74 %
24h
39.0 mm
2:45pm 17/01/2026
2:45pm 18/01/2026
1 in 1.0 years
99.17 %
30h
43.0 mm
2:45pm 17/01/2026
8:45pm 18/01/2026
1 in 1.0 years
99.15 %
36h
47.0 mm
2:45pm 17/01/2026
2:45am 19/01/2026
1 in 1.0 years
99.12 %
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.