Katherine has recorded more than 10mm from a downpour of rain this morning with more than 70mm in some areas.

Many gutters and drains overflowed ever though the town is suffering one of its worst wet seasons on record.

But some weather experts are saying a tropical cyclone could develop over the Gulf of Carpentaria this weekend and may track across the Top End, then as a tropical low, just south of Katherine.

Most weather websites predict the path of the low is heading Katherine's way early next week but it is a long way out and there are no warnings yet from the Bureau of Meteorology.

The bureau says a monsoon trough is developing over the Territory's Top End and northern Queensland during the second half of this week.

"As this monsoon trough deepens towards the end of the week, a number of forecast models suggest that a low pressure system will develop over the Gulf of Carpentaria. Conditions over the Gulf will become favourable for this low pressure system to deepen into a tropical cyclone on the weekend," the bureau says.

It will only be the fourth cyclone of the season and is set to be called Esther.

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