2:45pm 17/01/2026 to 2:45pm 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
14.6 mm
11:00pm 18/01/2026
11:15pm 18/01/2026
1 in 1.0 years
97.29 %
30m
25.2 mm
3:30am 19/01/2026
4:00am 19/01/2026
1 in 1.1 years
90.36 %
45m
37.6 mm
3:30am 19/01/2026
4:15am 19/01/2026
1 in 1.4 years
70.78 %
60m
45.6 mm
3:15am 19/01/2026
4:15am 19/01/2026
1 in 1.6 years
63.39 %
90m
53.6 mm
3:00am 19/01/2026
4:30am 19/01/2026
1 in 1.7 years
59.58 %
120m
55.0 mm
2:45am 19/01/2026
4:45am 19/01/2026
1 in 1.5 years
64.84 %
3h
55.4 mm
2:00am 19/01/2026
5:00am 19/01/2026
1 in 1.4 years
71.04 %
4h
56.6 mm
12:30am 19/01/2026
5:00am 19/01/2026
1 in 1.3 years
74.75 %
6h
85.2 mm
10:45pm 18/01/2026
4:45am 19/01/2026
1 in 2.4 years
41.71 %
9h
85.8 mm
10:30pm 18/01/2026
7:30am 19/01/2026
1 in 2.1 years
48.41 %
12h
85.8 mm
10:30pm 18/01/2026
10:30am 19/01/2026
1 in 1.9 years
53.59 %
18h
85.8 mm
8:45pm 18/01/2026
2:45pm 19/01/2026
1 in 1.6 years
62.13 %
24h
85.8 mm
2:45pm 18/01/2026
2:45pm 19/01/2026
1 in 1.5 years
67.67 %
30h
85.8 mm
8:45am 18/01/2026
2:45pm 19/01/2026
1 in 1.4 years
72.49 %
36h
85.8 mm
2:45am 18/01/2026
2:45pm 19/01/2026
1 in 1.3 years
77.11 %
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.