Low turns into cyclone Marcia, could become category 2

UPDATE: A low in the Coral Sea off the coast of Queensland has officially become Tropical Cyclone Marcia.

According to the Bureau of Meteorology, cyclone Marcia, currently a category 1, could be a category 2 cyclone by the time it reaches landfall.

The bureau released an updated warning about 8pm indicating that the system was curving onto a southwesterly track and it was expected to maintain this general motion through to landfall, which was expected to happen between St Lawrence and Hervey Bay early on Friday morning.

The system was producing sustained winds of 65km and wind gusts up to 95km, the bureau said.

A category 2 cyclone can produce wind gusts between 125-164km over open flat land.

According to the Bureau, a category 2 system can cause minor house damage, significant damage to signs, trees and caravans, heavy damage to some crops, risk of power failure and damage to small boats, which could break their moorings.

EARLIER: Both coastal and inland locations on the Fraser Coast are at risk of flooding this week, according to the latest information from Weatherzone.

Meteorologist from Weatherzone Andrew Duke said the Fraser Coast was expected to receive a total of up to 200mm of rain during Thursday and Friday, with isolated falls of up to 150mm in some areas on Thursday.

He said the expected heavy rain would be caused by the position of a tropical low in the Coral Sea.

"Friday's going to rain a lot because the area's on the south side of this tropical low," Mr Duke explained.

"There's a chance of the low becoming a category one cyclone on Friday and it's the rain from that which may cause river and flash flooding in the area."

While inland areas were expected to flood because of the large amount of rain, coastal areas might be flooded because of a combination of the tropical low and a king tide, which Mr Duke said was independent of the storm.

"Flooding of coastal parts and erosion is fairly likely," he said.

"This is due to the slight swelling of the seas and increased winds from the low on top of the king tide."

Mr Duke said he could not pinpoint where the flooding might happen.

"Because it's so widespread it's going to be difficult to tell where the floods are going to occur," he said.

"But coastal and inland locations may both flood."

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