Nelson Police are searching for Wakefield woman and have concerns for her welfare.
Rachel Stokes' car was found crashed on SH6 near Kawatiri Junction this morning.
A search and rescue operation was launched about 9am today 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 Rachel Stokes and police are appealing for members of the public who may have seen her, or offered her a ride to come forward.
She is European, aged 46 years.
Anyone with information is urged to call Nelson Police Ph 5463840.