Weather News

Flooding rain inbound for NSW

Ben Domensino, Monday November 26, 2018 - 15:22 AEDT

More than a month's worth of rain is likely to cause flooding along central parts of the NSW coast during the middle of this week, with damaging winds also likely in some areas.

A low pressure crossing NSW on Tuesday will cause showers and storms in the state's south and west. This system will deepen as it moves closer to the coast on Wednesday, causing wind and rain to increase considerably. The low is expected to move out into the Tasman Sea fairly quickly from Wednesday night and on Thursday, allowing calmer weather to return to NSW.

While this low pressure system will only be around for a couple of days, it's likely to cause heavy rain and potentially damage winds between Tuesday night and Thursday morning.

The areas to be affected by this severe weather will depend on the location of the low as it moves across eastern NSW and over the Tasman Sea.

These transient low pressure systems are difficult to predict ahead of time, much like their more intense and longer-lasting cousins, east coast lows.

At this stage, the heaviest rain from the low will most likely fall along the coast and adjacent inland between the Illawarra and Sydney. These areas could receive more than 100mm in the space of 24 hours.

Sydney usually received 34mm of rain during all of November, so this much rain in one day is certainly unusual at this time of year. However, it's not unprecedented. The city's wettest November day on record was 234.6mm during 1984.

An Initial Flood Watch was issued on Monday afternoon for coastal rivers between the Central Coast and Illawarra, where minor to moderate riverine flooding is possible from Wednesday.

Visit http://www.weatherzone.com.au/warnings.jsp for the latest warnings during the coming days.

- Weatherzone

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