3:15pm 17/01/2026 to 3:15pm 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
13.0 mm
5:45pm 18/01/2026
6:00pm 18/01/2026
1 in 1.1 years
92.89 %
30m
15.0 mm
5:45pm 18/01/2026
6:15pm 18/01/2026
1 in 1.0 years
97.72 %
45m
16.0 mm
5:45pm 18/01/2026
6:30pm 18/01/2026
1 in 1.0 years
98.5 %
60m
16.0 mm
5:30pm 18/01/2026
6:30pm 18/01/2026
1 in 1.0 years
98.94 %
90m
16.0 mm
5:00pm 18/01/2026
6:30pm 18/01/2026
1 in 1.0 years
99.46 %
120m
16.0 mm
4:30pm 18/01/2026
6:30pm 18/01/2026
1 in 1.0 years
99.76 %
3h
16.0 mm
3:30pm 18/01/2026
6:30pm 18/01/2026
1 in 1.0 years
99.84 %
4h
16.0 mm
2:00pm 18/01/2026
6:30pm 18/01/2026
1 in 1.0 years
99.91 %
6h
21.0 mm
5:15pm 18/01/2026
11:15pm 18/01/2026
1 in 1.0 years
99.76 %
9h
21.0 mm
2:15pm 18/01/2026
11:15pm 18/01/2026
1 in 1.0 years
99.85 %
12h
22.0 mm
3:30pm 18/01/2026
3:30am 19/01/2026
1 in 1.0 years
99.88 %
18h
22.0 mm
9:30am 18/01/2026
3:30am 19/01/2026
1 in 1.0 years
99.99 %
24h
22.0 mm
3:30am 18/01/2026
3:30am 19/01/2026
1 in 1 years
100.0 %
30h
25.0 mm
5:15pm 17/01/2026
11:15pm 18/01/2026
1 in 1 years
100.0 %
36h
26.0 mm
3:30pm 17/01/2026
3:30am 19/01/2026
1 in 1 years
100.0 %
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.