5:00am 18/01/2026 to 5:00am 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
9.0 mm
10:45am 18/01/2026
11:00am 18/01/2026
1 in 1.1 years
94.43 %
30m
13.0 mm
10:45am 18/01/2026
11:15am 18/01/2026
1 in 1.1 years
91.9 %
45m
16.0 mm
10:30am 18/01/2026
11:15am 18/01/2026
1 in 1.1 years
89.37 %
60m
17.0 mm
10:15am 18/01/2026
11:15am 18/01/2026
1 in 1.1 years
91.61 %
90m
19.0 mm
9:45am 18/01/2026
11:15am 18/01/2026
1 in 1.1 years
93.29 %
120m
23.0 mm
9:15am 18/01/2026
11:15am 18/01/2026
1 in 1.1 years
88.63 %
3h
28.0 mm
8:45am 18/01/2026
11:45am 18/01/2026
1 in 1.2 years
85.66 %
4h
31.0 mm
6:45am 18/01/2026
11:15am 18/01/2026
1 in 1.1 years
88.69 %
6h
34.0 mm
5:45am 18/01/2026
11:45am 18/01/2026
1 in 1.1 years
89.86 %
9h
38.0 mm
6:00am 18/01/2026
3:00pm 18/01/2026
1 in 1.1 years
92.93 %
12h
41.0 mm
5:45am 18/01/2026
5:45pm 18/01/2026
1 in 1.1 years
95.13 %
18h
44.0 mm
5:45am 18/01/2026
11:45pm 18/01/2026
1 in 1.0 years
97.36 %
24h
47.0 mm
5:15am 18/01/2026
5:15am 19/01/2026
1 in 1.0 years
98.28 %
30h
48.0 mm
5:15am 18/01/2026
11:15am 19/01/2026
1 in 1.0 years
98.71 %
36h
49.0 mm
5:15am 18/01/2026
5:15pm 19/01/2026
1 in 1.0 years
99.02 %
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.