The Bureau of Meteorology (BoM) says residents should now have their cyclone kits ready as Cyclone Alessia approaches the Northern Territory.
A cyclone warning is current for coastal areas from Mitchell Plateau to Point Stuart, including Darwin and the Tiwi Islands.
The bureau says Cyclone Alessia is expected to approach the west coast of the state as a tropical low or weak tropical cyclone.
The system is expected to bring rain and storms, and may lead to localised flooding as it makes landfall later this evening.
BoM has advised residents to prepare for cyclonic weather and organise an emergency kit including first aid kit, torch, portable radio, spare batteries, food and water.
Acting regional director Todd Smith says people can check the bureau's website for the latest updates.
"We won't really notice much until later on Sunday. Winds should start to pick up. Again it's that Sunday evening overnight into Monday morning where we'll expect the strongest winds," he said.
Darwin's Lord Mayor is urging people to be prepared and ensure they have cyclone kits and plans in place.
Katrina Fong Lim is also reminding householders to secure items that could become missiles in a storm.
"You need to go onto securent.nt.gov.au. They have a list for the cyclone shelters," she said.
"You need to know what's in your kit, make sure that everything's current. Make sure you've got enough water and make sure you've got a plan so people know what you're doing."
The Bureau of Meteorology has asked residents to ensure their neighbours have heard and understood the current warning, particularly new arrivals or those who many not fully understand English.
All of the airlines flying out of Darwin have met with airport management this morning and there are no changes planned at this stage.
However, passengers planning to travel should contact their airline to check on individual flights.
Meanwhile, all today's AFL matches in the NT have been cancelled because of the cyclone warning.