A status yellow thunder warning has been issued for nine counties this afternoon.
Met Éireann is predicting heavy thundery downpours in Cavan, Monaghan, Donegal, Longford, Louth, Meath, Leitrim, Roscommon and Sligo.
They say there is also a risk of localised flooding in those areas.
Status Yellow - Thunder warning for Cavan, Monaghan, Donegal, Longford, Louth, Meath, Leitrim, Roscommon and Sligo
Valid: today (Tuesday), 2 p.m. to 9 p.m.https://t.co/ozrQHtoOkt pic.twitter.com/qiGf4P1736
— Met Éireann (@MetEireann) August 6, 2019
The warning came into effect at 2pm and is valid until 9pm tonight.
Elsewhere, forecasters say there will be showers or longer spells of rain throughout the country this afternoon and evening.
However, the rain is expected to become more isolated tonight, leading to long clear periods.