The US National Hurricane Center in Miami has warned that storm Ophelia has changed its path and Donegal is now among the counties expected to be worst hit.
A Status Red alert has been issued for all counties however the Hurricane Center has said Galway, Mayo, Sligo and Donegal will bear the brunt.
According to Met Éireann the storm will reach the north west at approximately 3pm.
A Met Éireann Spokesperson said: “People should remain indoors for the duration of the storm. All unnecessary travel should be avoided while the storm is passing. Don’t travel during the height of the storm unless absolutely necessary. Listen to local radio and national media broadcasts for Met Éireann updates on the current weather situation. High seas are predicted, the public are advised to stay away from coastal areas during this period.”