Carmarthenshire is set for more freezing temperatures and snow on 'high ground' is forecast.
A yellow warning has been put in place from 4pm on Thursday, January 21, until 10am on Friday, and covers Carmarthenshire, Neath Port Talbot and the Swansea valley.
The Met Office warning follows torrential downpours from Storm Christoph, which caused widespread disruption across the region.
People have been warned to expect difficult travel conditions, icy patches on some untreated roads, pavements and cycle path, with a "greater likelihood of accidents or injuries".
A Met Office spokesperson said: "Further showers on Thursday night will leave surfaces wet. As ground temperatures fall below freezing, ice is likely to form in places.
"Some of the showers will be wintry, especially on high ground, with one to two centimetres of snow possible above 200 metres."
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