5:00am 18/01/2026 to 5:00am 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
5.4 mm
12:30pm 18/01/2026
12:45pm 18/01/2026
1 in 1.0 years
99.82 %
30m
8.4 mm
12:15pm 18/01/2026
12:45pm 18/01/2026
1 in 1.0 years
99.31 %
45m
10.4 mm
12:15pm 18/01/2026
1:00pm 18/01/2026
1 in 1.0 years
98.97 %
60m
12.8 mm
12:15pm 18/01/2026
1:15pm 18/01/2026
1 in 1.0 years
98.23 %
90m
14.8 mm
12:00pm 18/01/2026
1:30pm 18/01/2026
1 in 1.0 years
98.27 %
120m
15.0 mm
12:00pm 18/01/2026
2:00pm 18/01/2026
1 in 1.0 years
98.94 %
3h
16.4 mm
10:30am 18/01/2026
1:30pm 18/01/2026
1 in 1.0 years
99.41 %
4h
16.8 mm
10:00am 18/01/2026
2:30pm 18/01/2026
1 in 1.0 years
99.9 %
6h
16.8 mm
8:30am 18/01/2026
2:30pm 18/01/2026
1 in 1 years
100.0 %
9h
16.8 mm
5:30am 18/01/2026
2:30pm 18/01/2026
1 in 1 years
100.0 %
12h
16.8 mm
5:15am 18/01/2026
5:15pm 18/01/2026
1 in 1 years
100.0 %
18h
16.8 mm
5:15am 18/01/2026
11:15pm 18/01/2026
1 in 1 years
100.0 %
24h
17.2 mm
6:00am 18/01/2026
6:00am 19/01/2026
1 in 1 years
100.0 %
30h
17.2 mm
5:15am 18/01/2026
11:15am 19/01/2026
1 in 1 years
100.0 %
36h
17.2 mm
5:15am 18/01/2026
5:15pm 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.