In a statement issued on Saturday night, Police Scotland said: "Twenty-six LMRT personnel and one search dog conducted searches of the Coire Na Ciste area including the foot of Number 5 Gully, under Carn Dearg Buttress, below Waterfall Gully and both Castle Gullies.
"Searches were also conducted at both Castle Gullies, from the CIC (Charles Inglis Clark) Hut, traversing from Curtain to Castle area, below the Castle and Castle Ridge.
"Observations were made of the North Face, from Carn Mor Dearg, along with the foot of Observatory Gully and Douglas Boulder area.
"The weather today was very poor with high winds, falling snow, limited visibility and a considerable risk of avalanches.
"Sadly, there were no positive sightings today and searches have been suspended for tomorrow due to increasingly hazardous weather and further risk of avalanches.
"Reviews continue to be ongoing and it is hoped that there will be an improvement to the conditions on Monday or Tuesday.
"Both Rachel and Tim's family continue to be appraised of these circumstances."
Police have asked anyone with information to contact them on 101.
