Nelson police have concerns for the welfare of a Wakefield woman missing since this moring.
Rachel Stokes' car was found crashed on SH6 near Kawatiri Junction.
A search and rescue operation was launched about 9am and several ground search teams have scoured the immediate area. A helicopter and a search dog have also been deployed.
The search has failed to find any trace of the 46-year-old and police are appealing for members of the public who may have seen her, or offered her a ride to come forward.
Anyone with information is urged to call Nelson Police Ph 5463840.