A 48-hour status yellow rainfall warning has been issued for four counties in the north-west.

The alert, for Mayo, Sligo, Leitrim and Donegal, will come into effect tomorrow morning at 9 o'clock.

Heavy rain and blustery conditions are expected to last until the same time on Monday morning.

Met Éireann says the heaviest rain will fall over mountainous areas with a risk of flash flooding.