Met Éireann has issued a Status Orange rainfall warning and two Status Yellow warnings for wind and rain for today and tomorrow as Storm Francis approaches.
The Orange rainfall warning covers Connacht, Cavan, Monaghan, Donegal, Wexford, Cork, Kerry and Waterford.
Met Éireann said: "Intense rainfall associated with Storm Francis is expected at times Monday night and Tuesday, leading to accumulations of 40 to 60mm (higher values in mountainous areas).
"The most intense rainfall is expected to ease off in southern counties during Tuesday morning. Some flash flooding likely.
"This rainfall will further elevate river levels and may result in river flooding also."
It comes into effect at 9pm tonight until 5pm tomorrow.
A Yellow rainfall warning has been issued for Dublin, Carlow, Kildare, Kilkenny, Laois, Longford, Louth, Wicklow, Offaly, Westmeath, Meath, Clare, Limerick and Tipperary.
It comes into effect at 9pm tonight and will stay in place until 9pm tomorrow.
The Yellow wind warning has been issued for all of Munster, Dublin, Wicklow and Wexford for tomorrow.
Stephen has a @WeatherRTE update:— RTÉ (@rte) August 24, 2020
⚠️Orange Rainfall warning for Connacht, Donegal, Cavan, Monaghan and the South Coast
⚠️Yellow Rainfall warning elsewhere
⚠️Yellow Wind warning for Munster, Carlow, Kilkenny, Wexford, Dublin, Wicklowpic.twitter.com/UamX1bfWAk
Forecasters said that winds will possibly reach average speeds of 55-65km/h and gusts of up to 110km/h.
Met Éireann said: "Very windy or stormy conditions are expected on Tuesday as Storm Francis crosses Ireland.
"Some disruption is likely and possibly structural damage."
The warning will be in place from 6am until to 7pm tomorrow.
The storm comes less than a week after Storm Ellen, which caused considerable damage across the south and west and left almost 200,000 homes and businesses without power.
#StormFrancis has been named— Met Office (@metoffice) August 24, 2020
A deep area of low pressure will bring heavy rain and the risk of severe gales in places during Tuesday and Wednesday
Warnings have been issued, more information here https://t.co/vdbKXpnseG
stay #WeatherAware pic.twitter.com/UZk11JB7s8
The UK Met Office said that from tonight there would be strong wind gusts in exposed western locations.
The rain is expected to be heaviest in Northern Ireland and southwest Scotland, where 60-90mm of rain could fall as the storm moves from west to east, the Met Office added.
Chief Meteorologist Andy Page said: "The UK is in for another unseasonably wet and windy spell with Storm Francis arriving on Tuesday.
"There will be strong winds and heavy rain, especially in the west of the UK.
"A number of severe weather warnings have been issued and these warnings can be updated regularly so please keep up to date with the latest Met Office forecast."