4:15am 18/01/2026 to 4:15am 20/01/2026
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
5.0 mm
5:45pm 18/01/2026
6:00pm 18/01/2026
1 in 1 years
100.0 %
30m
10.0 mm
5:45pm 18/01/2026
6:15pm 18/01/2026
1 in 1.0 years
99.84 %
45m
11.0 mm
5:45pm 18/01/2026
6:30pm 18/01/2026
1 in 1.0 years
99.91 %
60m
12.0 mm
5:45pm 18/01/2026
6:45pm 18/01/2026
1 in 1.0 years
99.92 %
90m
14.0 mm
5:45pm 18/01/2026
7:15pm 18/01/2026
1 in 1.0 years
99.87 %
120m
16.0 mm
7:30pm 18/01/2026
9:30pm 18/01/2026
1 in 1.0 years
99.79 %
3h
23.0 mm
5:15pm 18/01/2026
8:15pm 18/01/2026
1 in 1.0 years
98.32 %
4h
34.0 mm
5:45pm 18/01/2026
10:15pm 18/01/2026
1 in 1.1 years
90.6 %
6h
35.0 mm
4:00pm 18/01/2026
10:00pm 18/01/2026
1 in 1.1 years
94.45 %
9h
40.0 mm
5:45pm 18/01/2026
2:45am 19/01/2026
1 in 1.0 years
95.38 %
12h
44.0 mm
2:45pm 18/01/2026
2:45am 19/01/2026
1 in 1.0 years
95.88 %
18h
47.0 mm
12:15pm 18/01/2026
6:15am 19/01/2026
1 in 1.0 years
98.04 %
24h
48.0 mm
6:15am 18/01/2026
6:15am 19/01/2026
1 in 1.0 years
98.73 %
30h
50.0 mm
11:30am 18/01/2026
5:30pm 19/01/2026
1 in 1.0 years
99.0 %
36h
52.0 mm
7:15am 18/01/2026
7:15pm 19/01/2026
1 in 1.0 years
99.17 %
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.