3:00am 18/01/2026 to 3:00am 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
17.0 mm
3:45pm 18/01/2026
4:00pm 18/01/2026
1 in 1.3 years
77.6 %
30m
31.0 mm
3:45pm 18/01/2026
4:15pm 18/01/2026
1 in 1.7 years
60.43 %
45m
32.0 mm
3:45pm 18/01/2026
4:30pm 18/01/2026
1 in 1.4 years
72.7 %
60m
33.0 mm
3:45pm 18/01/2026
4:45pm 18/01/2026
1 in 1.3 years
79.66 %
90m
33.0 mm
3:15pm 18/01/2026
4:45pm 18/01/2026
1 in 1.1 years
88.76 %
120m
33.0 mm
2:45pm 18/01/2026
4:45pm 18/01/2026
1 in 1.1 years
92.08 %
3h
33.0 mm
1:45pm 18/01/2026
4:45pm 18/01/2026
1 in 1.0 years
95.62 %
4h
33.0 mm
12:15pm 18/01/2026
4:45pm 18/01/2026
1 in 1.0 years
97.23 %
6h
33.0 mm
10:45am 18/01/2026
4:45pm 18/01/2026
1 in 1.0 years
98.21 %
9h
33.0 mm
7:45am 18/01/2026
4:45pm 18/01/2026
1 in 1.0 years
98.65 %
12h
33.0 mm
4:45am 18/01/2026
4:45pm 18/01/2026
1 in 1.0 years
98.96 %
18h
33.0 mm
3:15am 18/01/2026
9:15pm 18/01/2026
1 in 1.0 years
99.42 %
24h
33.0 mm
3:15am 18/01/2026
3:15am 19/01/2026
1 in 1.0 years
99.75 %
30h
33.0 mm
3:15am 18/01/2026
9:15am 19/01/2026
1 in 1.0 years
99.81 %
36h
33.0 mm
3:15am 18/01/2026
3:15pm 19/01/2026
1 in 1.0 years
99.85 %
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.