Flooding around the country could top the worst of what was experienced during Storm Desmond.
Storm Frank is expected to hit the north west, west and south coast this afternoon - with the storm reaching hurricane force winds out to sea.
While this level of wind won't reach the mainland the wind and rain will be extensive.
Local Authorities are advising motorists to avoid all non-essential travel.
Jim Casey from the Office of Public Works, is warning that flood levels are likely to increase, and that sea walls will be tested: