3:30am 18/01/2026 to 3:30am 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
6.0 mm
6:45am 18/01/2026
7:00am 18/01/2026
1 in 1 years
100.0 %
30m
11.0 mm
6:30am 18/01/2026
7:00am 18/01/2026
1 in 1.0 years
99.34 %
45m
16.0 mm
6:30am 18/01/2026
7:15am 18/01/2026
1 in 1.0 years
96.67 %
60m
19.0 mm
6:15am 18/01/2026
7:15am 18/01/2026
1 in 1.1 years
95.02 %
90m
27.0 mm
6:15am 18/01/2026
7:45am 18/01/2026
1 in 1.2 years
82.48 %
120m
29.0 mm
6:15am 18/01/2026
8:15am 18/01/2026
1 in 1.2 years
85.72 %
3h
40.0 mm
6:15am 18/01/2026
9:15am 18/01/2026
1 in 1.4 years
69.14 %
4h
42.0 mm
5:00am 18/01/2026
9:30am 18/01/2026
1 in 1.3 years
78.98 %
6h
42.0 mm
3:45am 18/01/2026
9:45am 18/01/2026
1 in 1.1 years
88.57 %
9h
45.0 mm
5:00am 18/01/2026
2:00pm 18/01/2026
1 in 1.1 years
93.33 %
12h
47.0 mm
4:15am 18/01/2026
4:15pm 18/01/2026
1 in 1.0 years
95.98 %
18h
48.0 mm
3:45am 18/01/2026
9:45pm 18/01/2026
1 in 1.0 years
98.48 %
24h
50.0 mm
5:15am 18/01/2026
5:15am 19/01/2026
1 in 1.0 years
98.94 %
30h
51.0 mm
3:45am 18/01/2026
9:45am 19/01/2026
1 in 1.0 years
99.35 %
36h
51.0 mm
3:45am 18/01/2026
3:45pm 19/01/2026
1 in 1.0 years
99.75 %
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.