It is obviously going to take more than a single big rain to send a ripple down the Katherine River.
The region is bone dry after two of the worst wet seasons since records have been taken.
More than 50mm was recorded in areas of Nitmiluk National Park on Thursday evening but river heights have not moved yet.
There have some reports of isolated falls around the town but less than 4mm mostly over the past few days. Katherine East had more than 10mm in some spots.
Power and Water released an emergency plan for Katherine on Friday to prepare for the forecast return of a La Nina-induced wet season and possible impacts on drinking water supplies when the "flush" happens.
The Bureau of Meteorology says the chance of rain from storms will continue through the week with the return of high temperatures - 38-40 degrees.
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