Mayo County Council say roads in the county were not gritted last night based on forecasts received by the local authority yesterday.
A spokesperson told Midwest News because of that forecast, roads were not gritted this morning either.
Based on reports of dangerous road conditions in various parts of the county, the council has now sent gritters to some problematic areas.
Slippery road conditions are being reported across the region.
Castlebar Gardai say there have been a number of minor accidents in their area due to black ice and extreme caution should be exercised.
Gardai in Claremorris say roads are in a treacherous state – especially the Kilbeg Road, the Ballyhaunis Road and the N17 but say caution should be exercised throughout the area.
In Belmullet itself conditions aren’t too bad but as you travel out from the town roads are in a dangerous condition.
Roads around Ballyhaunis and the town itself are very slippery, while the Ballyhaunis to Ballinlough Road is also very dangerous this morning, as is the Ballyhaunis to Tuam Road.
Road conditions in Ballina and Crossmolina are described as slippery, as is the N26 Foxford to Swinford Road, while Gardai in Castlerea say roads are in a treacherous state and extreme caution should be exercised, especially on the Castlerea side of the Ballyhaunis road, which is very dangerous this morning.