"Sian is around 5ft 6ins tall and was last seen wearing black trousers, black coat with possibly a brown jumper underneath, black shoes and had a small handbag with her.
A spokesperson for South Wales Police said: "Sian Jones, 53, from Rhiwbina in Cardiff, was last seen Thursday, February 13 is still missing.
She was last seen wearing black trousers, a black coat with possibly a brown jumper underneath, black shoes and had a small handbag with her.
Cops said her car, a 61-plate black Citroen C3 VTR+, was travelling northbound on the A4119 at Miskin, near junction 34 of the M4, at around 4.40pm on Thursday.
"It is now known that her car, a 61-plate black Citroen C3 VTR+, was travelling northbound on the A4119 at Miskin, near junction 34 of the M4, at around 4.40pm on Thursday February 13.
