Joanne, who is from Stornoway, was last seen in Barvas around 7.40 am driving a red Ford Focus motor vehicle, registration MF62 WVR.
A spokesman said: “If you know where Joanne is, or if you have have seen the car in question, then please contact Police Scotland via the 101 number quoting incident 0838 of Monday, 30 November, 2020.”
Any info can be given in confidence.