The Met Office has issued a yellow ice warning for the Western Isles, in place from 10pm tonight until 9am tomorrow (Wednesday).
Frequent wintry showers and falling temperatures are likely to lead to some icy surfaces later on Tuesday and early on Wednesday morning.
As an additional hazard, sleet and snow showers are expected to fall to increasingly low levels, more frequently so across the Northern Isles, Hebrides and Northwest Highlands. Up to 2 cm may accumulate, mainly above 100 m, away from northern coasts, with 2-5 cm over higher ground.
Expect difficult driving conditions on untreated roads as well as slippery conditions on pavements and cycle paths.
A cold northerly airstream will feed frequent showers of sleet, snow and hail across northern Scotland on Tuesday night and Wednesday morning. Snow and ice look unlikely to prove hazardous along windward coasts but are likely to lead to difficult travel conditions inland and on high ground.