BELMAR -- A 19-year-old Neptune City woman remains missing Monday, nearly three days after her car was found unoccupied on the Route 35 bridge in Belmar, and her family is appealing for any information to help locate her.

Sarah Stern left her family's home at 11:45 p.m. Friday driving her grandmother's 1994 Oldsmobile Eighty-Eight Royal, said her father Michael Stern. The car was found parked on the Route 35 Bridge around 2:45 a.m. Saturday.

Michael Stern, who was in Florida when authorities found the car, said he is hoping someone driving over the bridge between 12 a.m. and the time the car was found could have seen something that can help police locate his daughter.

"On a Friday night around midnight, there's a lot of activity on that bridge," said Michael Stern, who asked anyone who may have seen something to call police.

A search of the Shark River by air and water was conducted Saturday and included local and county authorities, New Jersey State Police and U.S. Coast Guard.

The search was called off around 3 p.m. and did not continue on Sunday, Belmar Mayor Matthew Doherty said.

Sarah Stern is a graduate of Neptune High School, where she played on the softball team for three years.

She attended Brookdale Community College for a year and studied art and TV production.

Her father said she is an aspiring artist and Bruno's Pizza & Sub shop had reached out to her about painting a winter-themed mural on its window. Sarah specializes in pencil portraits, her father said. She also has an interest in media and was hoping to pursue a career in the field.

She lives in Neptune City with her father and grandmother, who have been residents of the Jersey Shore borough for more than 60 years.

Doherty said the police investigation is active and ongoing. Michael Stern said he has had regular contact with authorities.

He has since returned to Neptune City from Florida, where he has family members living. Sarah had spent the Thanksgiving holiday with them in Florida, he said.

In the time since the missing person report was filed, friends and family have been sharing Facebook posts in hopes it reaches someone that has information helpful to authorities.

A post shared by one of Stern's cousins has more than 20,000 shares on Facebook and 1,568 comments as of Monday afternoon.

"Sarah had a lot of people she knew," Michael Stern said. "Time is of the essence."

He asked anyone with information to call the Belmar Police Department at 732-681-1700.

Alex Napoliello may be reached at anapoliello@njadvancemedia.com. Follow him on Twitter @alexnapoNJ. Find NJ.com on Facebook.