Storm Barney will sweep across the country tomorrow with the strongest winds being felt in the southern half of the country.
The Met Office has warned that the strong gusts are likely to bring down trees, cause some structural damage, and possibly lead to power cuts.
The worst of the weather is expected during the evening rush hour.
The Met Office's Chief Forecaster said: "A deepening area of low pressure is likely to track east across southern Ireland and then central parts of the UK during Tuesday afternoon and evening, with a swathe of very strong winds potentially developing on the southern flank of the low."
"At this stage, the worst of the winds are expected to reach West Wales mid to late afternoon, sweeping rapidly eastwards during the evening."
"There remains a good deal of uncertainty in this evolution and particularly the location of the strongest winds, so this Warning will be kept under review and updated as necessary."