Road users are advised to avoid the L1064 Mongorry Road from Glenmaquin school through Mongorry today (Friday).
This road, which connects Listillion to Raphoe, is impassable due to ice.
Donegal County Council issued the alert this morning.
The Lough Salt Road has been closed since yesterday due to icy conditions. The “road will reopen when safe to do so,” said a statement from the council.