4:00am 18/01/2026 to 4:00am 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
2.6 mm
4:45am 19/01/2026
5:00am 19/01/2026
1 in 1 years
100.0 %
30m
4.2 mm
10:00am 18/01/2026
10:30am 18/01/2026
1 in 1 years
100.0 %
45m
5.0 mm
9:45am 18/01/2026
10:30am 18/01/2026
1 in 1 years
100.0 %
60m
5.6 mm
9:45am 18/01/2026
10:45am 18/01/2026
1 in 1 years
100.0 %
90m
6.8 mm
9:15am 18/01/2026
10:45am 18/01/2026
1 in 1 years
100.0 %
120m
7.2 mm
9:00am 18/01/2026
11:00am 18/01/2026
1 in 1 years
100.0 %
3h
7.4 mm
8:30am 18/01/2026
11:30am 18/01/2026
1 in 1 years
100.0 %
4h
10.0 mm
12:30am 19/01/2026
5:00am 19/01/2026
1 in 1 years
100.0 %
6h
11.6 mm
12:30am 19/01/2026
6:30am 19/01/2026
1 in 1 years
100.0 %
9h
17.0 mm
8:30pm 18/01/2026
5:30am 19/01/2026
1 in 1 years
100.0 %
12h
19.4 mm
7:00pm 18/01/2026
7:00am 19/01/2026
1 in 1 years
100.0 %
18h
22.0 mm
6:30pm 18/01/2026
12:30pm 19/01/2026
1 in 1 years
100.0 %
24h
28.0 mm
9:15am 18/01/2026
9:15am 19/01/2026
1 in 1 years
100.0 %
30h
29.4 mm
6:30am 18/01/2026
12:30pm 19/01/2026
1 in 1 years
100.0 %
36h
30.2 mm
9:15am 18/01/2026
9:15pm 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.