The alert is in effect from now until 9pm.
A status yellow Thunderstorm warning has been issued for 10 counties.
The alert for; Westmeath, Offaly, Longford, Louth, Meath, Cavan, Monaghan, Leitrim, Roscommon and Galway is now in effect until 9pm
Deirdre Lowe of Met Eireann says there will be heavy showers or thunderstorms that could lead to localised flooding.