WATERVILLE — Large-scale efforts to find a missing 20-month-old girl were hampered Friday by a couple of inches of snow that fell overnight in central Maine.

On the seventh day of efforts to find Ayla Reynolds, teams of state game wardens were available for targeted searches, and investigators continued a “painstaking review of an unprecedented amount of information which has been gathered to date,” said Waterville Police Chief Joseph Massey in a news release.

Dozens of friends and family members of Ayla’s mother, Trista Reynolds, gathered in Congress Square in Portland on Friday evening for a candlelight vigil for the toddler.

Reynolds said Friday morning on NBC’s “Today” show that “I just want her home. … And I’m hoping for maybe my Christmas present … that she’s going to come home.”

Ayla was reported missing by her father, Justin DiPietro, just before 9 a.m. on Dec. 17, some 10 to 12 hours after he said she was put to bed, according to police.

Ayla had been living with her father since child welfare workers intervened while Trista Reynolds checked herself into a 10-day rehabilitation program in October.

Police said Ayla was last seen wearing green one-piece pajamas with polka dots, with the words “Daddy’s Princess” on them. She is 2 feet 9 inches tall and weighs about 30 pounds. Her left arm is in a soft cast.

Hundreds of officials and volunteers have helped search for the girl since DiPietro told police she wasn’t in her bed when he checked on her on the morning of Dec 17.

Investigators put crime-scene tape around DiPietro’s house on Thursday and two state homicide prosecutors were called to the site, but police said they are still treating the disappearance as a missing-child case.

Massey said the investigation was focused on DiPietro’s house because that’s where the girl was last seen. “Don’t read any more into it,” he said.

Dave Martin, president of Dirigo Search and Rescue, one of 15 volunteer groups affiliated with the Maine Association of Search and Rescue, said he packed up his trailer and left Waterville on Thursday night.

He said wardens met with volunteers at 5 p.m. Thursday to say that they were planning to search smaller areas Friday morning.

The grandmother of the missing toddler, Becca Hanson of Portland, said she is getting all of her information on the investigation through news reports.

“We haven’t heard one thing from the police,” she said in a phone interview Friday.

Hanson said she has theories about what happened to her granddaughter, but she’s not sharing them.

Morning Sentinel Staff Writer Ben McCanna contributed to this report.