Big tides, beach erosion and up to 150mm of rain likely
[UPDATE 3:34 PM]
A TROPICAL low pressure system in the Coral Sea is set to cross the Capricornia or Wide Bay coast on Friday, according to the Bureau of Meteorology.
The monsoon trough is likely to extend southwards of the low towards Queensland's southeast late in the working week, resulting in severe weather near, and well to the south of the low.
Heavy rain and damaging winds are possible from the coast to the ranges between Rockhampton and Brisbane from Thursday, extending down to the state's southern border during Friday.
The heavy rain may lead to flash flooding, with some 24 hour totals in excess of 300 mm.
The damaging gusts may reach around 90 km/hr, mostly near the coast and ranges.
Water levels on the high tide are likely to exceed the highest tide of the year between Rockhampton and the Gold Coast from Thursday.
Dangerous surf conditions and significant beach erosion are also expected between Rockhampton and the Gold Coast from Thursday.
Locations which may be affected include Gold Coast, Brisbane, Maroochydore, Gympie, Bundaberg, Gladstone and Rockhampton.
[ 2:00 PM ]
THE weather bureau says all eyes are on a tropical low developing in the Coral Sea which has the potential to bring extreme weather to the Fraser Coast.
While Cyclone Lam is causing concern for those in the state's far north, it's the tropical low which is on track to cross the coast near Rockhampton which has the potential to batter central and south-east Queensland
Bureau of Meteorology forecaster Jeff Carey said BoM would be better placed to issue definite warnings for the low in the next 24-48 hours and warned people to be prepared either way.
Should the low fizzle out before it reaches the coast, Mr Carey said the "most likely scenario" for the region would be a forecast of some of the largest tides of the year, beach erosion and up to 150mm of rain in Maryborough and Hervey Bay on Thursday.
Mr Carey said how quickly that rain fell would be key to whether the region experienced flooding.
With a dryer than usual wet season, Mr Carey said that if rain fell over a couple of days, the soil would likely soak it up but if the same amount fell within an hour or two, flash flooding would be likely.
He said should the low develop into a tropical cyclone the bureau would " be expecting a completely different scenario" for the region and urged residents to stay up to date through the BoM website and social media.