2:45pm 20/01/2026 to 2:45pm 22/01/2026
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 21/01/2026
9:15pm 21/01/2026
1 in 1.4 years
69.79 %
30m
15.0 mm
8:45pm 21/01/2026
9:15pm 21/01/2026
1 in 1.0 years
95.53 %
45m
15.0 mm
8:30pm 21/01/2026
9:15pm 21/01/2026
1 in 1.0 years
98.48 %
60m
15.0 mm
8:15pm 21/01/2026
9:15pm 21/01/2026
1 in 1.0 years
99.13 %
90m
15.0 mm
7:45pm 21/01/2026
9:15pm 21/01/2026
1 in 1.0 years
99.82 %
120m
15.0 mm
7:15pm 21/01/2026
9:15pm 21/01/2026
1 in 1.0 years
99.95 %
3h
15.0 mm
7:00pm 21/01/2026
10:00pm 21/01/2026
1 in 1 years
100.0 %
4h
15.0 mm
7:00pm 21/01/2026
11:30pm 21/01/2026
1 in 1 years
100.0 %
6h
15.0 mm
7:00pm 21/01/2026
1:00am 22/01/2026
1 in 1 years
100.0 %
9h
15.0 mm
12:15pm 21/01/2026
9:15pm 21/01/2026
1 in 1 years
100.0 %
12h
15.0 mm
9:15am 21/01/2026
9:15pm 21/01/2026
1 in 1 years
100.0 %
18h
15.0 mm
3:15am 21/01/2026
9:15pm 21/01/2026
1 in 1 years
100.0 %
24h
15.0 mm
9:15pm 20/01/2026
9:15pm 21/01/2026
1 in 1 years
100.0 %
30h
26.0 mm
3:15pm 20/01/2026
9:15pm 21/01/2026
1 in 1 years
100.0 %
36h
26.0 mm
3:00pm 20/01/2026
3:00am 22/01/2026
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.