A handful of schools in Aberdeenshire were also shut while dozens more opened later.
The latest warning, which took effect at 12:00 on Wednesday, states up to 15cm of snow could accumulate on high ground in the north and north east of the country.
The Met Office said: “Sleet and snow showers will continue for the rest of Wednesday and Thursday, before dying out by the end of Thursday evening.
“North-west Scotland and the Northern and Western Isles will see the most frequent showers on Wednesday, before extending to the north east on Thursday.
“Further accumulations of 3-7cm are expected to low levels, with 10-15cm possible above 150 metres.”
In places that are still experiencing snow cover, it could be as cold as -14C to -16C on Wednesday night.
But on Thursday snow fields may see temperatures between -16C and -20C.
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