South West Coast
December 2017 Summary
Rainfall was average or higher than average across 91% of the area. Mean rainfall was 17 mm, 6% higher than the 1900 to 2016 mean of 16 mm for December.
Streamflows were average or lower than average for 89% of the sites, spread throughout the drainage division. Moore River at Quinns Ford had the third highest streamflow for December since 1980. Deep River at Teds pool had the third lowest streamflow for December since 1980.
Median streamflow salinities varied between 1015 and 57148 microSiemens/cm. Streamflows were fresh for none and brackish for 14% of the sites. Coblinine River - Bibikin Road Bridge had the highest salinity of all sites.
During December, storage volumes in all systems decreased. By the end of the month, the volume of water stored reduced to 45% of the total accessible capacity, an increase of 8% from the previous year.
|Rainfall decile group||Percentage of area|
|Highest on record since 1900||0%|
|Very much above average||11%|
|Very much below average||2%|
|Lowest on record since 1900||Less than 1%|
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