Downpours and storms raise threat of flash flooding

The SES warns residents to monitor conditions with heavy rain forecast and flash flooding possible. (Mick Tsikas/AAP PHOTOS)

East coast residents have been warned to stay vigilant as a severe weather system delivers a likely deluge and possible flooding.

The NSW north coast is expected to bear the brunt of wild weather as it moves across the border from Queensland on Monday, the Bureau of Meteorology says.