September 2019 Summary
Rainfall was average or lower than average for most of the region. With a mean rainfall of 0.2 mm, it was the eighth lowest for September in the past 120 years.
Streamflows were average or lower than average for 75 per cent of the sites. Above average streamflows were recorded in the remaining 25 per cent of sites mainly in the east. Gregory River at Gregory Downs had the lowest streamflow for September since 1980.
Streamflows were fresh or higher for all three reporting sites, with median streamflow salinity (electrical conductivity) varying between sites from 41 to 640 μS/cm.
During September, the total accessible volume at Mount Isa (the only storage system in the area) decreased by two per cent. By the end of the month, the volume of water stored was 84 per cent of the total accessible capacity, no change from the previous year.
|Rainfall decile group||Percentage of area|
|Highest on record since 1900||0%|
|Very much above average||0%|
|Very much below average||4%|
|Lowest on record since 1900||0%|
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