4:00pm 17/01/2026 to 4:00pm 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
15.0 mm
9:00pm 17/01/2026
9:15pm 17/01/2026
1 in 1.0 years
95.31 %
30m
23.0 mm
8:45pm 17/01/2026
9:15pm 17/01/2026
1 in 1.1 years
92.94 %
45m
27.0 mm
8:45pm 17/01/2026
9:30pm 17/01/2026
1 in 1.1 years
94.45 %
60m
28.0 mm
8:30pm 17/01/2026
9:30pm 17/01/2026
1 in 1.0 years
96.56 %
90m
29.0 mm
8:15pm 17/01/2026
9:45pm 17/01/2026
1 in 1.0 years
98.4 %
120m
30.0 mm
8:15pm 17/01/2026
10:15pm 17/01/2026
1 in 1.0 years
98.77 %
3h
30.0 mm
7:15pm 17/01/2026
10:15pm 17/01/2026
1 in 1.0 years
99.5 %
4h
30.0 mm
5:45pm 17/01/2026
10:15pm 17/01/2026
1 in 1.0 years
99.84 %
6h
30.0 mm
4:15pm 17/01/2026
10:15pm 17/01/2026
1 in 1.0 years
99.94 %
9h
30.0 mm
4:15pm 17/01/2026
1:15am 18/01/2026
1 in 1 years
100.0 %
12h
30.0 mm
4:15pm 17/01/2026
4:15am 18/01/2026
1 in 1 years
100.0 %
18h
30.0 mm
4:15pm 17/01/2026
10:15am 18/01/2026
1 in 1 years
100.0 %
24h
30.0 mm
4:15pm 17/01/2026
4:15pm 18/01/2026
1 in 1 years
100.0 %
30h
31.0 mm
4:15pm 17/01/2026
10:15pm 18/01/2026
1 in 1 years
100.0 %
36h
31.0 mm
4:15pm 17/01/2026
4:15am 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.