3:45pm 17/01/2026 to 3:45pm 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
4:15pm 17/01/2026
4:30pm 17/01/2026
1 in 1.8 years
54.61 %
30m
21.0 mm
4:15pm 17/01/2026
4:45pm 17/01/2026
1 in 1.5 years
66.93 %
45m
35.0 mm
4:15pm 17/01/2026
5:00pm 17/01/2026
1 in 3.8 years
26.41 %
60m
37.0 mm
4:00pm 17/01/2026
5:00pm 17/01/2026
1 in 3.1 years
32.59 %
90m
55.0 mm
4:15pm 17/01/2026
5:45pm 17/01/2026
1 in 8.8 years
11.36 %
120m
61.0 mm
4:15pm 17/01/2026
6:15pm 17/01/2026
1 in 8.6 years
11.68 %
3h
76.0 mm
4:00pm 17/01/2026
7:00pm 17/01/2026
1 in 11.2 years
8.91 %
4h
83.0 mm
4:00pm 17/01/2026
8:30pm 17/01/2026
1 in 7.8 years
12.8 %
6h
84.0 mm
4:00pm 17/01/2026
10:00pm 17/01/2026
1 in 4.9 years
20.33 %
9h
88.0 mm
4:00pm 17/01/2026
1:00am 18/01/2026
1 in 3.2 years
31.04 %
12h
90.0 mm
4:00pm 17/01/2026
4:00am 18/01/2026
1 in 2.4 years
41.07 %
18h
95.0 mm
4:00pm 17/01/2026
10:00am 18/01/2026
1 in 1.9 years
51.9 %
24h
95.0 mm
4:00pm 17/01/2026
4:00pm 18/01/2026
1 in 1.6 years
62.63 %
30h
95.0 mm
4:00pm 17/01/2026
10:00pm 18/01/2026
1 in 1.5 years
68.35 %
36h
95.0 mm
4:00pm 17/01/2026
4:00am 19/01/2026
1 in 1.4 years
73.12 %
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.