1:00pm 17/01/2026 to 1:00pm 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
60m
53.2 mm
12:00am 18/01/2026
1:00am 18/01/2026
1 in 2.0 years
50.0 %
120m
60.6 mm
12:00am 18/01/2026
2:00am 18/01/2026
1 in 1.8 years
56.26 %
3h
66.0 mm
11:00pm 17/01/2026
2:00am 18/01/2026
1 in 1.8 years
56.32 %
6h
73.4 mm
11:00pm 17/01/2026
5:00am 18/01/2026
1 in 1.6 years
61.0 %
9h
79.4 mm
11:00pm 17/01/2026
8:00am 18/01/2026
1 in 1.6 years
63.29 %
12h
89.8 mm
11:00pm 17/01/2026
11:00am 18/01/2026
1 in 1.7 years
58.69 %
18h
96.6 mm
8:00pm 17/01/2026
2:00pm 18/01/2026
1 in 1.6 years
64.26 %
24h
121.8 mm
11:00pm 17/01/2026
11:00pm 18/01/2026
1 in 1.9 years
53.01 %
30h
126.8 mm
10:00pm 17/01/2026
4:00am 19/01/2026
1 in 1.7 years
57.63 %
36h
130.8 mm
10:00pm 17/01/2026
10:00am 19/01/2026
1 in 1.6 years
62.58 %
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.