Weather News

Hot and dry start to 2018 in NSW

Ben Domensino, Wednesday February 14, 2018 - 11:53 EDT

A relatively dry start to 2018 has taken a toll on water storage across western NSW, while the addition of unusually hot weather has seen soil moisture levels drop markedly across much of the state.

While rainfall during the final three months of 2017 was near to above average for many parts of NSW, the start of 2018 has seen a drying trend despite weak La Nina conditions in the Pacific Ocean.

The lack of early-year rainfall has been accompanied by intense and record-breaking heat, with NSW as a whole registering its hottest January since 1939 in terms of maximum temperatures.

The combination of dry and hot weather in recent weeks has seen the Murray Darling Basin's total water storage drop to its lowest level in almost two years.

The accessible volume of the Murray Darling Basin on 13th February 2018 was 14,926 GL, which was 58.9 percent of its capacity.

This is the Basin's lowest volume since August 2016 and a bit over 4000 GL below the volume on the same date last year.

In addition to the reduced volume of water in storage catchments, the root zone soil moisture - which is the amount of moisture in the top one metre of soil - has also fallen across most of NSW.

During the month ending on 13th February 2018, most districts in central and northern NSW had below-average soil moisture in the root zone.

Parts of the Upper Hunter currently have root zone soil moisture values that are in the bottom one percent of historical observations and the lowest they have seen in any month since 2006.

Looking ahead, there are indications that showers and storms may become more active over some some parts of central and northern NSW early next week.

Even is this activity does eventuate, it is unlikely to produce enough widespread and persistent rainfall to make up for the deficits seen during the past few weeks.

- Weatherzone

© Weatherzone 2018

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