South East Coast (NSW)
May 2019 Summary
Dry conditions continued from previous month. Rainfall was lower than average across 81 per cent of the area, spread throughout the drainage division. Mean rainfall was 21 mm, 72 per cent lower than the long-term mean of 75 mm for May. Rainfall was the tenth lowest for May in the past 120 years.
Streamflow was very much below average (including lowest on record) for 81 per cent of the sites, spread throughout the drainage division. At 13 sites streamflows were the lowest for May since 1980. Similar to the previous month, these were located in the Clarence River, Macleay River, Hasting River, Bellinger River, Manning River, Karuah River, Hunter River, Shoalhaven River and Clyde River catchments.
Median streamflow salinity (electrical conductivity) increased slightly and varied between sites from 363 to 1844 μS/cm. Streamflow was fresh or better quality for 29 per cent of the sites and brackish for 57 per cent of the sites.
During May, the total accessible volumes decreased in five storage systems. By the end of the month, the volume of water stored was 53 per cent of the total accessible capacity, a decrease of 17 per cent from the same time last year.
|Rainfall decile group||Percentage of area|
|Highest on record since 1900||0%|
|Very much above average||0%|
|Very much below average||18%|
|Lowest on record since 1900||Less than 1%|
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