The Welsh and Cornish coasts could have winds of 55mph, while along the coast of southern England, gusts may reach 50mph, it added.
The storm, which is set to hit the United Kingdom on Friday and Saturday, will see high winds across most of the United Kingdom, particularly in the west.
A status orange weather warning is in effect for Glway, Mayo, and Donegal as Met Eireann warns that Storm Erik could bring winds of up to 130km/hr, possibly stronger on exposed coast. People are advised to avoid exposed coastal walks and to take precautions with property, boats etc.
An Orange wind warning is now valid for Galway, Mayo and Donegal with the forecaster warning of "damaging" gusts.
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Storm Erik is set to bring strong gusts and heavy rain to the United Kingdom, as the weekend gets off to a wet and windy start.
"Erik will bring very windy conditions for much of the British Isles and NW Europe through Friday and Saturday..."
Southwesterly winds will strengthen across the United Kingdom on Friday, so it's going to be a windy day for everyone.
The Met Office warned that travel delays throughout the day were very likely, with the risk of fallen trees blocking roads and railways and high winds closing bridges and ferry routes.
Meanwhile, a yellow warning for strong winds will cover Central, Tayside & Fife, north-east England, north-west England, Northern Ireland, south-west Scotland, Lothian Borders, Strathclyde and Yorkshire & Humber.