The updated weather warning applies to 12 counties.
Met Éireann has said it will be a wet weekend with heavy, thundery showers on the cards.
It comes as a Status Yellow rain and thunderstorm warning has been updated to apply to Cavan, Donegal, Dublin, Leitrim, Longford, Louth, Mayo, Meath, Monaghan, Roscommon, Westmeath and Sligo.
Valid from 10.30am on Saturday until midnight, the updated warning reads: “Heavy thundery showers or longer spells of rain will lead to further localised flooding and hazardous driving conditions.”
Status Yellow – Rain & Thunderstorm warning for Cavan, Donegal, Monaghan, Dublin, Longford, Louth, Meath, Westmeath, Leitrim, Mayo, Roscommon, Sligo
Update: Heavy thundery showers or longer spells of rain will lead to further localised flooding & hazardous driving conditions. pic.twitter.com/x0T3IuT6CA
— Met Éireann (@MetEireann) August 7, 2021
The UK Met Office has also issued a Status Yellow thunderstorm warning for Antrim, Armagh, Derry, Down, Fermanagh and Tyrone which is valid from 4am on Saturday until midnight.
Met Éireann’s national forecast for Saturday says there will be further heavy showers, with longer spells of rain at times.
There is also an ongoing risk of thunderstorms and spot flooding across the northern half of the country throughout the day.
The best of the drier and brighter interludes will be mainly in the south and southeast, as temperatures range from 15 to 19 degrees and blustery conditions in the west extend elsewhere in the afternoon.
The heavy showers will continue on Saturday night, merging into longer spells of rain at times across the northern half of the country.
Sunday will remain showery, with the rain heaviest and most frequent over the northern half of the country in the morning. Further heavy showers will move into Munster during the afternoon.
That said, it will be drier across the middle of the country with good sunny spells and just well-scattered showers.
Temperatures will range from 16 to 20 degrees and will be mildest in the east.
As for the week ahead, Met Éireann’s national outlook reads: “Continuing unsettled, with showers on most days. However, there will be some dry weather on Tuesday and Wednesday.
“Temperatures remaining near normal for mid-August.”
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