An unseasonal monsoon trough is expected to form off the NT coast this week.
Monsoonal rainfall, unusual for this time of the year, may affect parts of Australia's far north, the Bureau of Meteorology says.
But it is unlikely to bring much, if any, rain to Katherine.
The bureau says there is only a slight chance of rain for Katherine on Friday or Saturday.
The bureau says it is also unlikely there monsoon trough would spawn a cyclone.
"Tropical low or cyclone development becomes an increased risk with an active monsoon trough, but is not indicated on current weather model output."
The forecast monsoon trough is primarily due to a moderate pulse of the Madden-Julian Oscillation (MJO) which has moved close to Australian longitudes.
As this pulse of the MJO is likely to weaken in about a week, the monsoon activity to Australia's north is likely to weaken relatively quickly.
Well, it is no surprise to anyone the wet season was a shocker for Katherine.
Rain totals were down by about a quarter on average.
Most of the scarce monsoon troughs across the coast during the wet were weak and failed to penetrate far inland so Katherine was left to rely on storms.
The Top End's wet was mainly dry because of the late arrival of the monsoons.
Even with the late onset, most of the monsoon activity was over Queensland.
The wet usually drops off suddenly in Katherine as we move into the dry with average rainfall in May just 2.3mm.
The attention of Katherine residents has well and truly moved to water restrictions again - odd numbered homes can water on Mondays, Wednesdays and Saturdays (from 6pm to 8am) and even numbered homes on Tuesdays, Thursdays and Sundays.
In its wet season wrap-up, the bureau said the Barkly District, as well as much of the central NT, was among the hardest hit with record low rainfall totals in some areas
The date for the onset of the monsoon at Darwin on 23 January was the equal-third latest since records began in 1957, which meant a very dry start to the wet season, with the subsequent weak monsoon bursts in March and April not delivering the usual high rainfall to the Top End
Many NT sites, including Darwin River Dam, Elliot and Tennant Creek recorded their lowest season rainfall on record.
Almost all of the Northern Territory had above average mean temperatures (max and min temperatures combined) this wet season with daytime temperatures being especially high - the average NT-wide maximum daytime temperature was 2.5C above average, and the overnight temperature almost 2C above average,
Almost everywhere south of the Top End experienced the hottest on record October to April mean maximum temperature with many sites, including Alice Springs, Gove, Bradshaw, Rabbit Flat, Borroloola, Yulara and Curtin Springs breaking this record.
Overall, we can expect the dry season to bring slightly above average temperatures, both day time and night time, with a reasonable chance of above average rainfall in southern NT during the May to July period.
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