Galway and six other counties will come under a Status Yellow rain warning later today
The status yellow alert - which covers Connacht, Donegal and Cavan - will take effect at 10 tonight and end at 5 tomorrow morning
This is a change from Met Eireann's original time frame of 6pm to 3am
The weather authority is warning of heavy spells of blustery rain, which may lead to difficult travelling conditions, poor visibility and localised flooding