Yesterday, her family were informed Harvey had "turned up" at her workplace in Napier.
"I'm very relieved to say the least," Weston said.
She understood that after receiving "some bad news" on Thursday, and again on Friday, her mother had gone to spend the day in rural Hawke's Bay.
However when she headed back to Napier, "she skidded off the road in her car".
Although Harvey was unhurt, she was unable to get her Subaru Legacy back onto the road and could not call for help as "she was out in the sticks without any signal".
"I'm just glad she's okay, because it could have been a lot worse," Weston said. "She's in one piece, but is a bit embarrassed by all the fuss."
Harvey could not be reached for comment yesterday.
Weston said she was grateful for the support people had shown their family. She raised the alert over the weekend as her mother had not responded to any calls, texts or Facebook messages since Friday, which was out of character.