2:45pm 17/01/2026 to 2:45pm 19/01/2026
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
4.0 mm
4:30pm 17/01/2026
4:45pm 17/01/2026
1 in 1 years
100.0 %
30m
8.0 mm
4:30pm 17/01/2026
5:00pm 17/01/2026
1 in 1 years
100.0 %
45m
10.0 mm
12:30am 18/01/2026
1:15am 18/01/2026
1 in 1 years
100.0 %
60m
11.0 mm
12:15am 18/01/2026
1:15am 18/01/2026
1 in 1 years
100.0 %
90m
14.0 mm
11:45pm 17/01/2026
1:15am 18/01/2026
1 in 1 years
100.0 %
120m
16.0 mm
11:45pm 17/01/2026
1:45am 18/01/2026
1 in 1 years
100.0 %
3h
17.0 mm
10:45pm 17/01/2026
1:45am 18/01/2026
1 in 1 years
100.0 %
4h
19.0 mm
10:45pm 17/01/2026
3:15am 18/01/2026
1 in 1 years
100.0 %
6h
20.0 mm
8:30pm 17/01/2026
2:30am 18/01/2026
1 in 1 years
100.0 %
9h
27.0 mm
4:30pm 17/01/2026
1:30am 18/01/2026
1 in 1 years
100.0 %
12h
31.0 mm
4:15pm 17/01/2026
4:15am 18/01/2026
1 in 1 years
100.0 %
18h
31.0 mm
3:00pm 17/01/2026
9:00am 18/01/2026
1 in 1 years
100.0 %
24h
31.0 mm
3:00pm 17/01/2026
3:00pm 18/01/2026
1 in 1 years
100.0 %
30h
31.0 mm
3:30pm 17/01/2026
9:30pm 18/01/2026
1 in 1 years
100.0 %
36h
31.0 mm
3:00pm 17/01/2026
3:00am 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.