Met Eireann has issued a status yellow rainfall warning for Munster, Connacht, Carlow, Kildare, Kilkenny, Laois, Longford, Wexford, Wicklow, Offaly and Westmeath.
The warning comes into effect at 6pm on Sunday and is valid until midnight on Monday.
Heavy rainfall will occur during the period indicated with the potential for heavy downpours locally and during shorter intervals.
There is potential for flooding on already saturated or waterlogged grounds.
Subscribe or register today to discover more from DonegalLive.ie
Buy the e-paper of the Donegal Democrat, Donegal People's Press, Donegal Post and Inish Times here for instant access to Donegal's premier news titles.
Keep up with the latest news from Donegal with our daily newsletter featuring the most important stories of the day delivered to your inbox every evening at 5pm.