Police and the family of missing Strabane woman Lesley McHugh are becoming increasingly concerned for her welfare.
Lesley was last in contact with her family around 11pm on Saturday, January 6.
The 69-year-old is described as being approximately 5'6" tall, of slim build with brown hair.
Inspector Alison Ferguson said: "Searches are ongoing along the River Mourne into the River Foyle and police would appeal for those searching to be mindful of their own personal safety given the current weather conditions."
"Anyone who knows of Lesley’s whereabouts or who may have any information to assist Police are asked to contact the non-emergency number 101, quoting reference 655 of 07/01/18."