Source: Bureau of Meteorology

For people in parts of Illawarra and South Coast Forecast Districts.

Issued at 6:24 am Monday, 4 December 2017.

COASTAL TROUGH BRINGING HEAVY RAIN TO THE SOUTHERN COAST

A trough is deepening near the NSW coast, and is expected to bring periods of heavy rain to the southern NSW coast today and Tuesday. Rainfall may be enhanced on a local scale by the development of small low pressure circulations within the trough, and thunderstorm activity.

HEAVY RAIN, which may lead to FLASH FLOODING, is possible in coastal areas between Nowra and Narooma from this afternoon until Tuesday afternoon.

24 hour rain totals in excess of 100mm are likely, with the bulk of this forecast to fall at night.

Locations which may be affected include Batemans Bay, Moruya Heads, Huskisson, Ulladulla and Narooma.

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.