Police are investigating two possible sightings of missing dog walker Ausra Plungiene as the weather continues to hamper the search.
Dozens of rescue volunteers are scouring the area where the 56-year-old mum was last seen in Snowdonia with her black Swedish lapphund called Eyora.
The pair had set off for the mountains above the Conwy Valley on Tuesday morning.
The search was paused at 8pm yesterday before resuming again today.
Her disappearance came as overnight temperatures plunged to almost zero degrees amid a yellow weather warning across parts of Wales for wind, rain and snow on higher ground.
North Wales Police said it is looking into two separate potential sightings of Ausra, from Prestatyn, Denbighshire.
Superintendent Owain Llewelyn has said: "We had reports of two sightings of a female with a dog on Tuesday in the hills to the south of Rowen, at approximately 11.30am and 4.30pm.
"If that was you, please contact us so we can eliminate you from our enquiries."
The force said she is an experienced mountain walker who was well equipped for the conditions.
It comes after Ausra's daughter begged for her mum to come home.
In a Facebook post on Wednesday morning, Toma Plungauite said: "Mommy, come home pls."
Supt Llewellyn said: "We are desperately concerned about Ausra's wellbeing, as are her family.
"A large search involving several organisations has been taking place all day in the mountains above Rowen until we lost the light in the evening."
65 volunteers, including members of the RAF Mountain Rescue Service, have been out on the hills "in some extremely challenging conditions", Supt Llewellyn added.
"It's an absolutely horrendous situation for the family."
Video posted on Twitter showed snow and ice on the ground and strong winds yesterday.
Ausra's car was found in a mountain car park in Bwlch-y-ddeufaen shortly after midnight on Wednesday.
It is believed Ausra may have been wearing a dark pink or purple padded jacket, black leggings and blue shoes.
Officers are appealing for anyone who may have been walking in that area on Tuesday with a dog to get in touch.
Investigators are also looking into possible leads from a hillwalking app Ausra uses to log her routes.
Supt Llewellyn urged people not to conduct their own searches due to the weather.
Daughter Toma previously appealed to the public for help, describing her mum as a "beautiful soul".
She told the Sun: "My mum is the most beautiful soul, who would do anything for anyone.
"So I’m asking for anyone with any information to come forward to bring our mummy home."
Anybody who may have seen Ausra or have any information is urged to contact North Wales Police on 101 or via the website, quoting reference number A052734.
