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
15.0 mm
4:45pm 18/01/2026
5:00pm 18/01/2026
1 in 1.3 years
74.46 %
30m
16.0 mm
4:45pm 18/01/2026
5:15pm 18/01/2026
1 in 1.1 years
92.19 %
45m
17.0 mm
4:45pm 18/01/2026
5:30pm 18/01/2026
1 in 1.0 years
95.39 %
60m
17.0 mm
4:30pm 18/01/2026
5:30pm 18/01/2026
1 in 1.0 years
96.88 %
90m
17.0 mm
4:00pm 18/01/2026
5:30pm 18/01/2026
1 in 1.0 years
98.31 %
120m
17.0 mm
3:30pm 18/01/2026
5:30pm 18/01/2026
1 in 1.0 years
98.64 %
3h
20.0 mm
2:30pm 18/01/2026
5:30pm 18/01/2026
1 in 1.0 years
98.39 %
4h
20.0 mm
1:00pm 18/01/2026
5:30pm 18/01/2026
1 in 1.0 years
98.84 %
6h
20.0 mm
11:30am 18/01/2026
5:30pm 18/01/2026
1 in 1.0 years
99.19 %
9h
20.0 mm
8:30am 18/01/2026
5:30pm 18/01/2026
1 in 1.0 years
99.73 %
12h
20.0 mm
5:30am 18/01/2026
5:30pm 18/01/2026
1 in 1.0 years
99.83 %
18h
20.0 mm
11:30pm 17/01/2026
5:30pm 18/01/2026
1 in 1.0 years
99.97 %
24h
20.0 mm
5:30pm 17/01/2026
5:30pm 18/01/2026
1 in 1 years
100.0 %
30h
30.0 mm
2:45pm 17/01/2026
8:45pm 18/01/2026
1 in 1.0 years
99.81 %
36h
30.0 mm
2:45pm 17/01/2026
2:45am 19/01/2026
1 in 1.0 years
99.88 %
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.