The Welsh and Cornish coasts could have winds of 55mph, while along the coast of southern England, gusts may reach 50mph, it added.
It will be valid from 5am and remain in place until 1pm in the afternoon.
The yellow wind warning for Carlow predicts Southwest to west winds which will reach mean speeds of 50 to 65 km/h with gusts of 80 to 110 km/h.
"Bear in mind that there is a risk of coastal flooding on Atlantic coasts in particular: only drive through water if you know it's not too deep for your auto".
Some delays to road, rail, air and ferry transport are likely, forecasters said.
Overall, Friday will be a very windy day with strong to gale-force southwesterly winds gradually veering westerly.
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She said: "It's going to be a noticeably windy day everywhere today".
The strong winds has caused severe travel disruptions in some areas, with train services suspended between Tattenham Corner and Coulsdon Town in Surrey due to fallen tree on the line.
As the low pressure system brings windy and wet weather across much of the United Kingdom, the Met Office has issued warnings for Highlands and Eilean Siar, Northern Ireland, southwest Scotland and Strathclyde on Friday.
Delays for high-sided vehicles on exposed routes and bridges are also likely, while heavy rain could see flooding in some parts.
Gales are expected to be stronger around exposed coasts with speeds of 70mph possible.
On Saturday, the severe wind warning is extended to Central, Tayside and Fife, northeast England, northwest England, Northern Ireland, southwest Scotland, Strathclyde and Yorkshire and Humber.