4:30pm 17/01/2026 to 4:30pm 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
17.6 mm
2:15am 19/01/2026
2:30am 19/01/2026
1 in 2.1 years
47.31 %
30m
20.0 mm
2:15am 19/01/2026
2:45am 19/01/2026
1 in 1.5 years
65.12 %
45m
22.0 mm
2:15am 19/01/2026
3:00am 19/01/2026
1 in 1.4 years
69.18 %
60m
22.2 mm
2:15am 19/01/2026
3:15am 19/01/2026
1 in 1.3 years
77.17 %
90m
22.2 mm
1:45am 19/01/2026
3:15am 19/01/2026
1 in 1.1 years
88.62 %
120m
22.2 mm
1:15am 19/01/2026
3:15am 19/01/2026
1 in 1.1 years
93.62 %
3h
22.8 mm
2:00am 19/01/2026
5:00am 19/01/2026
1 in 1.0 years
97.23 %
4h
23.2 mm
2:00am 19/01/2026
6:30am 19/01/2026
1 in 1.0 years
98.9 %
6h
23.8 mm
1:45am 19/01/2026
7:45am 19/01/2026
1 in 1.0 years
99.54 %
9h
23.8 mm
10:45pm 18/01/2026
7:45am 19/01/2026
1 in 1.0 years
99.97 %
12h
27.4 mm
3:15pm 18/01/2026
3:15am 19/01/2026
1 in 1.0 years
99.94 %
18h
38.2 mm
11:45am 18/01/2026
5:45am 19/01/2026
1 in 1.0 years
99.47 %
24h
39.2 mm
11:45am 18/01/2026
11:45am 19/01/2026
1 in 1.0 years
99.82 %
30h
37.4 mm
8:45pm 17/01/2026
2:45am 19/01/2026
1 in 1 years
100.0 %
36h
41.2 mm
8:45pm 17/01/2026
8:45am 19/01/2026
1 in 1.0 years
99.96 %
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.