A 19-year-old Petaluma woman visiting South Lake Tahoe for the Snowglobe Music Festival — an annual 3-day music event that draws an estimated 40,000 people to the area — has been missing since late New Year's Eve, according to her father.

Alyssa Byrne, who graduated from Casa Grande High School in 2011 and currently works at Cattlemens in Petaluma, traveled to the festival with friends on Saturday morning and was staying at the Horizon Casino Resort. Her father, Kevin Byrne, who lives in Petaluma with his wife, Alyssa and her older brother, traveled to South Lake Tahoe to aid authorities in the search. He said Wednesday afternoon from South Lake Tahoe that police there currently do not have any solid information on her whereabouts.

"It appears that around 11:30 p.m. on New Year's Eve she told her friends she was taking the shuttle (from the festival) back to her hotel," said a worried Byrne. "That was the last time her friends saw her. Someone said they saw her in the casino area around midnight on New Years, but that was the last sighting of Alyssa."

Byrne said that South Lake Tahoe Police are working with hotel and casino management to review video surveillance footage to try and establish Alyssa's last movements before she went missing.

Byrne and the South Lake Tahoe Police Department are asking that anyone with knowledge of Alyssa Byrne's whereabouts to please contact the South Lake Tahoe Police Department at (530) 542-6100 or the Petaluma Police Department at (707) 778-4372.

(Contact Janelle Wetzstein at janelle.wetzstein@arguscourier.com)