4:45pm 17/01/2026 to 4:45pm 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
9.6 mm
5:30am 18/01/2026
5:45am 18/01/2026
1 in 1.1 years
91.34 %
30m
11.2 mm
5:15am 18/01/2026
5:45am 18/01/2026
1 in 1.0 years
96.63 %
45m
12.4 mm
5:15am 18/01/2026
6:00am 18/01/2026
1 in 1.0 years
97.79 %
60m
15.2 mm
11:30pm 17/01/2026
12:30am 18/01/2026
1 in 1.0 years
95.33 %
90m
17.2 mm
5:30am 18/01/2026
7:00am 18/01/2026
1 in 1.0 years
95.56 %
120m
20.6 mm
5:15am 18/01/2026
7:15am 18/01/2026
1 in 1.1 years
91.58 %
3h
20.8 mm
5:00am 18/01/2026
8:00am 18/01/2026
1 in 1.0 years
96.41 %
4h
21.8 mm
5:00am 18/01/2026
9:30am 18/01/2026
1 in 1.0 years
98.27 %
6h
21.8 mm
3:30am 18/01/2026
9:30am 18/01/2026
1 in 1.0 years
99.0 %
9h
36.8 mm
10:15pm 17/01/2026
7:15am 18/01/2026
1 in 1.2 years
86.74 %
12h
38.0 mm
10:00pm 17/01/2026
10:00am 18/01/2026
1 in 1.1 years
89.77 %
18h
38.0 mm
10:00pm 17/01/2026
4:00pm 18/01/2026
1 in 1.0 years
95.57 %
24h
38.0 mm
10:00pm 17/01/2026
10:00pm 18/01/2026
1 in 1.0 years
97.47 %
30h
38.0 mm
10:00pm 17/01/2026
4:00am 19/01/2026
1 in 1.0 years
98.35 %
36h
38.0 mm
10:00pm 17/01/2026
10:00am 19/01/2026
1 in 1.0 years
98.64 %
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.