Met Eireann have issued a weather warning for five counties.
Carlow, Kilkenny, Wexford, Wicklow and Waterford have all been issued a Status Yellow rainfall warning.
The weather warning, which is valid from 3pm on Friday afternoon to 3pm on Saturday, states that there will be "further spells of heavy rain expected with a continued risk of thundery downpours and flooding."
While the rest of the country has escaped the weather warning, heavy rain is expected in several counties in the east of Ireland throughout Friday evening.
— Met Éireann (@MetEireann) November 22, 2019
The national forecast reads: "Staying mostly cloudy with showery outbreaks of rain. The rain will be heavy or thundery in places - especially across the east and southeast. Highest temperatures of 7 to 9 degrees in moderate to fresh east winds.
"Persistent and occasionally heavy rain will move in across the eastern half of the country overnight, with the risk of thundery downpours and spot flooding. Staying mostly dry across the western areas, with slight frost and fog patches locally. Lowest temperatures 1 to 5 degrees. Moderate northeast winds.
"Tomorrow Saturday will be a cloudy day with scattered outbreaks of rain, persistent at times across eastern counties. Drier and somewhat brighter across the west and southwest, however mist and fog patches may be slow to clear these parts. Highest temperatures of 7 to 10 degrees, in light northerly breezes."