Several Local Link bus services in the Shannonside region have been cancelled because of Storm Éowyn.
There will be none in Donegal, Sligo or Leitrim on Friday until 3pm at the earliest.
In Longford, Westmeath and Roscommon, all door-to-door services have been cancelled for Friday, and all remaining services will not run on Friday until further notice.
All civic amenity sites in Roscommon will be closed on Friday and Saturday.
Meanwhile, Knock Airport said: "Passengers or people collecting passengers at the airport on Friday are advised to contact their airline for the most up-to-date flight information.
"If your flight is impacted as a result of the weather warning, your airline will notify you directly in advance.