Around 30,000 households have been left without power in Ireland, as Storm Callum lashes towards the UK.
The Met Office meteorologist Alex Burkhill said: "We've got a wind warning which covers all the western side of the UK".
Areas in the south and south west could see between 50 to 100mm of rain by the end of Friday, with as much as 120 to 160mm likely over high, south-facing ground.
Strong to gales force winds will affect Ireland and the United Kingdom during Friday 12 Oct. Gusts of 60 to 70mph are forecast, possibly higher for exposed hills and coastlines. Further strong winds may bring down leaves and branches, increasing the likelihood of flooding due to blocked drains or culverts.
Met Éireann has issued an updated Status Orange wind warning for Donegal, Galway, Mayo and Sligo until 16:00 on Friday.
Guests arriving at the royal wedding in a windy Windsor had to hold on to their hats, with gusts of up to 32 miles per hour.
There will be spells of heavy rainfall and high tides with the possibility of coastal flooding.
Event highlights mental health issues
Today is a day like every other day where there are people around us suffering in silence. The whole month of October is also dedicated to mental health awareness.
Pembrokeshire County Council is working with multi-agency partners to monitor the situation.
Natural Resources Wales' (NRW) have said they are sending out their emergency response teams to prepare for the storm, checking that flood defences are in good working order, clearing gulleys and ditches, and installing temporary defences.
"We also have yellow and amber warnings of between 50mm and 150mm of rain for Wales".
While heavy rain is expected to continue into Saturday, the wind is now forecast to ease off by Friday evening.
Due to the threat of coastal flooding, Arriva Trains Wales and Network Rail have amended services on the Swansea to Carmarthen line from 07:00 BST to 11:00 and after 19:00.
Met Office Shawbury said wind was expected to pick up on Friday along with outbreaks of rain.