It may be a good time to get out the gumboots and umbrellas with a severe weather warning issued for people in the eastern parts of Sydney and the Central Coast.
The Bureau of Meteorology says a low pressure system is expected to form about central parts of the New South Wales coast today, before rapidly moving east away from the coast during Thursday morning.
Heavy rain which may lead to flash flooding is likely overnight, with localised 12 hour rainfall totals in excess of 100mm expected.
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Locations which may be affected include eastern parts of Sydney, Gosford, Wyong and The Entrance.
The State Emergency Service advises that people should:
* Don’t drive, ride or walk through flood water.
* Keep clear of creeks and storm drains.
* If you are trapped by flash flooding, seek refuge in the highest available place and ring 000 if you need rescue.
* For emergency help in floods and storms, ring your local SES Unit on 132 500.
More information on the severe weather warning can be found here.