The first named storm of the season is set to bring strong winds to the southern half of the country.
A Status Yellow wind warning is in place for all of Munster and counties Galway, Kilkenny, Wexford, Carlow, Wicklow and Dublin.
Storm Aileen is expected to bring winds with a mean speed of 50-65km/h and gusts of up to 110km/h.
The depression is expected to track eastward across the country this evening.
The weather warning comes into effect at 2pm and will remain in place until midnight.
A Status Orange gale warning is also in place with southerly winds veering westerly set to reach gale or strong gale force this afternoon on coasts from Howth Head to Roches Point to Erris Head and on the South Irish Sea.
West to northwest gales or strong gales will follow this evening on coasts from Carlingford Lough to Roches Point to Erris Head and on the Irish Sea, with winds touching storm force in the Irish Sea.
A scheme was launched by Met Éireann and the British Met Office to name storms in an effort to raise awareness of extreme weather events.
A storm is named when it is deemed to have the potential to cause medium or high impacts on Ireland and/or the UK, so weather systems where an amber or red warning is expected to be issued by Met Éireann and/or the Met Office will get a name.
Members of the public can submit names to either agency and these are combined to form a list which is released at the start of storm season in early autumn.
The list, which is in alphabetical order, alternates between male and female names.
Storms are not named using the letters Q, U, X, Y or Z in line with international naming conventions, and names associated with storms which have caused a loss of life elsewhere in the world are not used.
In previous years, the first named storm - Angus in 2016 and Abigail in 2015 - has not arrived until November.
The full list for this year's storms are: Aileen, Brian, Caroline, Dylan, Eleanor, Fionn, Georgina, Hector, Iona, James, Karen, Larry, Maeve, Niall, Octavia, Paul, Rebecca, Simon, Tali, Victor, Winifred.
