Motorists have been urged to expect disruption with heavy rain on its way to Northern Ireland, which could lead to flooding.
A yellow warning for rain is in place from Wednesday 6pm until tomorrow at 9am by the Met Office.
Heavy rain will spread across Northern Ireland on Tuesday evening, lasting through the night before turning lighter on Thursday morning.
Rainfall accumulations of 20-30mm are expected quite widely, with around 40mm likely over hilly regions.
With saturated ground, this will be enough to bring some flooding issues, said the Met Office.
Spray and flooding on roads will make journey times longer, and bus and train services will be affected, with journey times taking longer.