Tasman Island - IFD Analysis

Tasman Island - IFD

9:10pm 06/05/2026 to 9:10pm 08/05/2026

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

10m

2.0 mm

11:10am 07/05/2026

11:20am 07/05/2026

1 in 1 years

100.0 %

20m

3.0 mm

4:10am 07/05/2026

4:30am 07/05/2026

1 in 1 years

100.0 %

30m

4.0 mm

4:00am 07/05/2026

4:30am 07/05/2026

1 in 1.0 years

99.86 %

60m

5.0 mm

3:30am 07/05/2026

4:30am 07/05/2026

1 in 1 years

100.0 %

90m

5.8 mm

3:00am 07/05/2026

4:30am 07/05/2026

1 in 1 years

100.0 %

120m

6.6 mm

2:30am 07/05/2026

4:30am 07/05/2026

1 in 1 years

100.0 %

7.4 mm

3:10am 07/05/2026

6:10am 07/05/2026

1 in 1 years

100.0 %

8.6 mm

1:40am 07/05/2026

6:10am 07/05/2026

1 in 1 years

100.0 %

9.4 mm

12:10am 07/05/2026

6:10am 07/05/2026

1 in 1 years

100.0 %

11.0 mm

2:20am 07/05/2026

11:20am 07/05/2026

1 in 1 years

100.0 %

12h

12.0 mm

11:20pm 06/05/2026

11:20am 07/05/2026

1 in 1 years

100.0 %

18h

13.0 mm

9:10pm 06/05/2026

3:10pm 07/05/2026

1 in 1 years

100.0 %

24h

15.4 mm

12:30am 07/05/2026

12:30am 08/05/2026

1 in 1 years

100.0 %

30h

17.0 mm

9:10pm 06/05/2026

3:10am 08/05/2026

1 in 1 years

100.0 %

36h

18.2 mm

9:10pm 06/05/2026

9:10am 08/05/2026

1 in 1 years

100.0 %

48h

18.4 mm

9:10pm 06/05/2026

9:10pm 08/05/2026

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.

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Last 4 hours of SD and HD radar imagery
Last 4 days of AWS, rain gauge and river height observations
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