Met Éireann has issued a thunderstorm warning for Galway which will be in effect during Sunday afternoon and evening.
The stormy conditions are likely to bring spot flooding, poor visibility and difficult travelling conditions.
The status yellow warning begins at 1pm on Sunday and will remain in place until 9pm.
Sixteen other counties are affected by status yellow warnings from Met Éireann and the Met Office: Antrim, Armagh, Cavan, Clare, Derry, Donegal, Down, Fermanagh, Leitrim, Longford, Mayo, Monaghan, Roscommon, Sligo, Tyrone, and Westmeath.
The Met Office’s warning for the counties in the North is valid from 10am until 9pm.