A resident attempts to move a large log from a flooded bridge on Old Lismore Rd in Murwillumbah on Sunday, December 13, 2020. Picture: Liana Boss
A resident attempts to move a large log from a flooded bridge on Old Lismore Rd in Murwillumbah on Sunday, December 13, 2020. Picture: Liana Boss

Flash flooding could 'rapidly impact' homes, roads: SES

UPDATE, 3pm: MINOR flooding is possible in the Brunswick River and Marshalls Creek catchments tonight.

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The latest SES update explained there had been some renewed river rises being observed upstream of Billinudgel and Mullumbimby and further heavy rainfall is forecast for the rest of Monday.

"This may cause further rises to the minor flood levels at Billinudgel and Mullumbimby Monday evening. The flood situation is being monitoring and revised warnings will be issued should the situation change," the SES stated.

"Minor flooding is possible along the Marshalls Creek on Monday evening.

"Rainfall run off (flash flooding) may rapidly impact low lying residential areas and access roads.

"Flood height levels may be affected by high tides."

 

UPDATE, 1.25pm: THE Bureau of Meteorology has predicted that minor flooding is possible at Lismore on Tuesday.

Rainfall and river conditions have developed as expected.

"There are currently some renewed river rises being observed in the upper tributaries, and further heavy rainfall is forecast for the rest of today," the SES explained in its latest update.

"This may cause further rises to the minor flood level at Lismore on Tuesday."

The Bureau of Meteorology has predicted that the Wilsons River at Lismore may reach the minor flood level (4.20m) during Tuesday.

Minor flooding is possible along the Wilsons River.

What we are expecting

  • People upstream of the Rowing Club River Gauge should allow for a level at least half a metre higher than the gauge reading due to the flood slope
  • Residents and businesses in the Lismore Basin may experience localised flash flooding prior to
  • river rises
  • A number of low lying rural roads may be flooded.
     

UPDATE, 9.50am: LEAKING roofs and fallen trees have dominated the calls for help received by the NSW State Emergency Service's Lismore City Unit.

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In a statement on social media, the unit said it had responded to nine jobs since Sunday morning.

They have been "almost even split between leaking roofs and trees down", the unit said.

Those who need to access to sandbags can collect them from the SES; phone 132 500 to arrange.

"Overnight rainfall was mostly not as heavy as feared, but with the catchment saturated, we are seeing almost 100 per cent runoff now," the unit said.

"Only 25mm fell at Lismore over the past 12 hours.

"Higher in the catchment at Terania Creek, 70mm was recorded and 100mm at Doon Doon.

"Although much of the Doon Doon falls will drain north into Clarrie Hall Dam, it is indicative of the rain fall on the Nightcap Range.

"Leycester Creek at Rock Valley is steady at 2m. Goolmangar Ck at Nimbin rose again to 4.5m and at Goolmangar it is 4.7m and rising again.

"Terania Ck at The Channon is steady at 4m. At Tuncester, Leycester Ck crested below 3m and has receded slightly.

"In the East, Repentance is steady at 2.25m and at Corndale, it is 3.25m and rising again. The Wilsons River at Nashua has dropped to 2m and showing signs of rising again.

"At Woodlawn it has crested below 3.5m."

A severe storm warning and flood warning remain current.

 

Original story: A MODERATE flood warning is still in place for the Wilsons River at Lismore, as heavy rainfall continues to lash the region.

The SES and the Bureau of Meteorology have warned that minor flooding is likely in Lismore from midday on Monday.

Moderate flooding is possible, with further heavy rain expected throughout Monday and into Tuesday.

"Heavy rainfall over the Leycester Creek and Wilsons River catchment from Friday to Sunday has caused significant river level rises," the warning states.

"Minor flooding is likely at Lismore from midday Monday.

"Further rises to the moderate flood level are possible on Tuesday.

"A severe weather warning for very heavy rainfall is current for the Northern Rivers areas."

In the Tweed, moderate flooding is possible at Tumbulgum and minor flooding may develop at Murwillumbah on Monday evening and redevelop at Tumbulgum and Chinderah from Monday morning into Tuesday with the high tides.

The Tweed River at North Murwillumbah may reach the minor flood level (3.00m) Monday evening.

The Tweed River at Tumbulgum may reach the minor flood level (1.40m) Monday morning with the high tide.

Renewed river rises up to the moderate flood level (1.80m) are possible overnight Monday into Tuesday with the high tide.

The Tweed River at Chinderah (Barneys Point) may reach the minor flood level (1.30 m) Monday morning and again Tuesday morning with the high tides.

The Bureau of Meteorology has this morning issued a fresh severe weather warning for the Northern Rivers, with heavy rainfall, damaging winds, abnormally high tides and damaging surf expected.

"Heavy rainfall is expected to return to the Northern Rivers and parts of the Mid North Coast during Monday morning," BoM stated in its warning.

"Rainfall rates could be locally enhanced in the far north with thunderstorms, leading to the possibility of very heavy rainfall and dangerous flash flooding."

What to expect

Wilsons River: Moderate flooding is possible along the Wilsons River at Lismore. Minor flooding is likely at Lismore from midday Monday. The Wilsons River at Lismore (AHD) is likely to reach the minor flood level (4.20 m) around midday Monday. Further rises to the moderate flood levels are possible on Tuesday.

Based on the prediction provided by the Bureau of Meteorology it is expected the following areas will be impacted by floodwaters:

  • Roads and Low lying farm land and rural properties
  • Hensley Car Park
  • Lower Rowing Club Car Park
  • Bridge St near McKenzie Park in North Lismore.

 

What you need to do

People in areas likely to be impacted by flooding need to consider the following:

  • If your property/business is at risk of inundation, please raise moveable items, such as
  • furniture, as high as possible onto benches or tables, placing electrical items on top
  • Secure outside belongings and before leaving; turn off the power, water and take essential
  • medicines and clothes with you
  • Monitor emergency warnings and severe weather updates
  • Never drive, ride or walk through flood water.

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