The BOM has advised overtopping of the Lismore levee in northern NSW is likely this morning.
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Intense rainfall rates are expected to persist over the next several hours as a low pressure system moves slowly to the south and west. Renewed river level rises are expected during Wednesday with bands of heavy rain affecting the Wilsons River catchment.
The town has been in recovery mode since last month's major flood event.
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The Wilsons River at Lismore to overtop the levee this morning, with further rises in the afternoon possible. The Wilsons River at Woodlawn and Leycester Creek at Tuncester are still rising and peak predictions at Lismore will be made after upstream peaks are observed.
A Severe Weather Warning is current for the Northern Rivers and parts of the Mid North Coast and Northern Tablelands Forecast District.
The situation is being closely monitored and revised predictions will be provided if necessary.
Lismore SES have been undertaking manual calculations to determine when overtopping will occur.
"Our members have taken manual readings of the flood heights in the CBD and compared them to the flood gauge readings. The countdown timer on Browns Creek pump station is reading 400mm greater than the actual figure. This means if the levee overtops there will be still 0.40 till overtop reading on the display," Lismore SES posted on Facebook.
There have been some big rainfall totals in the region in the past 24 hours: Alstonville STP 208mm, Dunoon 143mm and Nimbin 139mm.
If you require transportation from any of the areas in the current evacuation order areas, call 132 500 to request assistance. #NSWSES vehicles are being deployed for this purpose. Please don't drive or walk through flood waters.
Major flooding is also likely along the Wilsons River at Lismore.
The Wilsons River at Lismore (AHD) is likely to exceed 10.60 metres 08:00 am Wednesday with major flooding. Further rises possible in the afternoon.
An Evacuation Order was issued for people in the Lismore CBD, low lying areas of East Lismore, Girards Hill and the Lismore Basin in the early hours of this morning.
If you are in those areas, leave now via New Ballina Rd, to Bruxner Hwy, to Dalley St, to get to the evacuation centre at SCU in East Lismore.
Localised flooding is occurring now and people should evacuate before roads are cut off.
The SES says if water continues to rise, it will be too unsafe to leave.
Torrential rain continues to fall on Lismore.
NSW SES is directing people within these areas to evacuate the high danger area via New Ballina Road, Bruxner Highway and Dalley Street.
Flash flooding in the CBD as a result of heavy rainfall has inundated roads. Residents should evacuate now, prior to the closure of further roads. If water continues to rise, it may be too unsafe to leave.
For the latest flood and weather warnings see www.bom.gov.au/nsw/warnings/
For the latest rainfall and weather forecasts see www.bom.gov.au/australia/meteye/
For the latest rainfall and river level information see www.bom.gov.au/nsw/flood
For the latest road closures see https://disaster.lismore.nsw.gov.au/dashboard/overview
For more information on the Flood Watch Service: http://www.bom.gov.au/.../floods/floodWarningServices.shtml
FloodSafe advice is available at www.ses.nsw.gov.au
