Latest IE update suggests Sligo line closed until at least the 19th:
Sligo line inc. Longford (Until Further Notice)
•Bus transfers are in place between Carrick-on-Shannon and Longford due to flooding with delays of up to 60mins to each service. This is expected to continue until this weekend at the earliest*.
Source
http://www.irishrail.ie/news/weather...-storm-desmond at 2017 14.12.2015 [ The Forum clock is 4 minutes slow ]