4:15pm 17/01/2026 to 4:15pm 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
9.4 mm
3:15am 18/01/2026
3:30am 18/01/2026
1 in 1.1 years
94.14 %
30m
16.6 mm
3:15am 18/01/2026
3:45am 18/01/2026
1 in 1.3 years
76.06 %
45m
20.2 mm
3:00am 18/01/2026
3:45am 18/01/2026
1 in 1.4 years
72.09 %
60m
20.4 mm
3:00am 18/01/2026
4:00am 18/01/2026
1 in 1.2 years
80.28 %
90m
20.4 mm
2:30am 18/01/2026
4:00am 18/01/2026
1 in 1.1 years
90.46 %
120m
20.4 mm
2:00am 18/01/2026
4:00am 18/01/2026
1 in 1.0 years
95.36 %
3h
20.4 mm
1:00am 18/01/2026
4:00am 18/01/2026
1 in 1.0 years
98.39 %
4h
20.4 mm
11:30pm 17/01/2026
4:00am 18/01/2026
1 in 1.0 years
99.52 %
6h
20.4 mm
10:00pm 17/01/2026
4:00am 18/01/2026
1 in 1.0 years
99.89 %
9h
20.4 mm
7:00pm 17/01/2026
4:00am 18/01/2026
1 in 1 years
100.0 %
12h
21.2 mm
3:00am 18/01/2026
3:00pm 18/01/2026
1 in 1 years
100.0 %
18h
21.2 mm
9:00pm 17/01/2026
3:00pm 18/01/2026
1 in 1 years
100.0 %
24h
21.2 mm
5:15pm 17/01/2026
5:15pm 18/01/2026
1 in 1 years
100.0 %
30h
21.2 mm
5:15pm 17/01/2026
11:15pm 18/01/2026
1 in 1 years
100.0 %
36h
21.2 mm
5:15pm 17/01/2026
5:15am 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.