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
16.0 mm
5:00pm 18/01/2026
5:15pm 18/01/2026
1 in 1.3 years
75.28 %
30m
24.0 mm
4:45pm 18/01/2026
5:15pm 18/01/2026
1 in 1.4 years
70.77 %
45m
24.0 mm
4:30pm 18/01/2026
5:15pm 18/01/2026
1 in 1.2 years
84.92 %
60m
24.0 mm
4:15pm 18/01/2026
5:15pm 18/01/2026
1 in 1.1 years
89.83 %
90m
24.0 mm
3:45pm 18/01/2026
5:15pm 18/01/2026
1 in 1.1 years
94.85 %
120m
24.0 mm
3:30pm 18/01/2026
5:30pm 18/01/2026
1 in 1.0 years
96.27 %
3h
24.0 mm
2:15pm 18/01/2026
5:15pm 18/01/2026
1 in 1.0 years
98.03 %
4h
24.0 mm
12:45pm 18/01/2026
5:15pm 18/01/2026
1 in 1.0 years
98.6 %
6h
24.0 mm
11:15am 18/01/2026
5:15pm 18/01/2026
1 in 1.0 years
98.92 %
9h
24.0 mm
8:15am 18/01/2026
5:15pm 18/01/2026
1 in 1.0 years
99.39 %
12h
24.0 mm
5:15am 18/01/2026
5:15pm 18/01/2026
1 in 1.0 years
99.75 %
18h
24.0 mm
11:15pm 17/01/2026
5:15pm 18/01/2026
1 in 1.0 years
99.86 %
24h
24.0 mm
5:15pm 17/01/2026
5:15pm 18/01/2026
1 in 1.0 years
99.95 %
30h
26.0 mm
2:45pm 17/01/2026
8:45pm 18/01/2026
1 in 1.0 years
99.94 %
36h
26.0 mm
2:45pm 17/01/2026
2:45am 19/01/2026
1 in 1.0 years
99.99 %
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.