3:00pm 17/01/2026 to 3:00pm 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
15m
13.0 mm
1:45pm 18/01/2026
2:00pm 18/01/2026
1 in 1.4 years
73.13 %
30m
16.0 mm
1:30pm 18/01/2026
2:00pm 18/01/2026
1 in 1.2 years
81.79 %
45m
16.0 mm
1:15pm 18/01/2026
2:00pm 18/01/2026
1 in 1.1 years
90.17 %
60m
16.0 mm
1:00pm 18/01/2026
2:00pm 18/01/2026
1 in 1.1 years
93.93 %
90m
16.6 mm
1:30pm 18/01/2026
3:00pm 18/01/2026
1 in 1.0 years
96.0 %
120m
16.6 mm
1:00pm 18/01/2026
3:00pm 18/01/2026
1 in 1.0 years
97.37 %
3h
16.6 mm
12:00pm 18/01/2026
3:00pm 18/01/2026
1 in 1.0 years
98.52 %
4h
16.8 mm
1:30pm 18/01/2026
6:00pm 18/01/2026
1 in 1.0 years
99.0 %
6h
16.8 mm
12:00pm 18/01/2026
6:00pm 18/01/2026
1 in 1.0 years
99.43 %
9h
16.8 mm
9:00am 18/01/2026
6:00pm 18/01/2026
1 in 1.0 years
99.82 %
12h
16.8 mm
6:00am 18/01/2026
6:00pm 18/01/2026
1 in 1.0 years
99.92 %
18h
16.8 mm
12:00am 18/01/2026
6:00pm 18/01/2026
1 in 1 years
100.0 %
24h
16.8 mm
6:00pm 17/01/2026
6:00pm 18/01/2026
1 in 1 years
100.0 %
30h
16.8 mm
3:15pm 17/01/2026
9:15pm 18/01/2026
1 in 1 years
100.0 %
36h
16.8 mm
3:15pm 17/01/2026
3:15am 19/01/2026
1 in 1 years
100.0 %
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.