5:15am 18/01/2026 to 5:15am 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
6.0 mm
11:15pm 18/01/2026
11:30pm 18/01/2026
1 in 1 years
100.0 %
30m
11.5 mm
11:15pm 18/01/2026
11:45pm 18/01/2026
1 in 1.0 years
99.76 %
45m
13.5 mm
11:00pm 18/01/2026
11:45pm 18/01/2026
1 in 1.0 years
99.65 %
60m
15.5 mm
11:00pm 18/01/2026
12:00am 19/01/2026
1 in 1.0 years
99.3 %
90m
20.5 mm
10:30pm 18/01/2026
12:00am 19/01/2026
1 in 1.0 years
98.23 %
120m
21.5 mm
9:45pm 18/01/2026
11:45pm 18/01/2026
1 in 1.0 years
98.53 %
3h
28.0 mm
8:30pm 18/01/2026
11:30pm 18/01/2026
1 in 1.0 years
96.56 %
4h
37.0 mm
7:45pm 18/01/2026
12:15am 19/01/2026
1 in 1.1 years
92.68 %
6h
45.0 mm
8:30pm 18/01/2026
2:30am 19/01/2026
1 in 1.1 years
89.44 %
9h
58.0 mm
7:00pm 18/01/2026
4:00am 19/01/2026
1 in 1.2 years
86.89 %
12h
60.5 mm
8:00pm 18/01/2026
8:00am 19/01/2026
1 in 1.1 years
91.22 %
18h
68.0 mm
6:45pm 18/01/2026
12:45pm 19/01/2026
1 in 1.1 years
95.1 %
24h
70.0 mm
12:45pm 18/01/2026
12:45pm 19/01/2026
1 in 1.0 years
97.32 %
30h
72.5 mm
6:45am 18/01/2026
12:45pm 19/01/2026
1 in 1.0 years
98.34 %
36h
74.5 mm
6:00am 18/01/2026
6:00pm 19/01/2026
1 in 1.0 years
98.67 %
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.