Source: Bureau of Meteorology

For people in parts of Arnhem district.

Issued at 10:52 am Thursday, 18 December 2025.

Heavy rainfall developing over the eastern Arnhem with a tropical low on Friday.

Weather Situation: Tropical low 07U is expected to move southwards on Thursday and approach the northeast Arnhem coast on Friday morning, bringing with it a risk of heavy rainfall with showers and thunderstorms. The low is expected to continue tracking southwards into Saturday and may bring a heavy rainfall risk to parts of the Carpentaria.

HEAVY RAINFALL which may lead to FLASH FLOODING is forecast for the eastern Arnhem including Groote Eylandt on Friday. Northern parts of the warning area may experience heavy rainfall from early Friday morning, before the risk shifts southwards into the afternoon and evening. Six-hourly rainfall totals between 150 to 180 mm are possible in localised areas.

Locations which may be affected include Nhulunbuy and Alyangula.

The Northern Territory Emergency Service advises that people should:
* secure loose outside objects and seek shelter when conditions deteriorate
* pull over if it is raining heavily and you cannot see, park with your hazard lights on until the rain clears
* avoid driving into water of unknown depth and current
* create your own sandbags if there is flooding, by using pillow cases or shopping bags filled with sand and place them around doorways to protect your home
* stay away from flooded drains, rivers, streams and waterways
* ensure pets and animals are safe
* be prepared in case of power outages, have an emergency kit with a radio, torch, spare batteries and first aid kit
* for emergency help in floods, storms and cyclones, contact the NTES on 132 500. For more safety tips visit www.securent.nt.gov.au