The weather system will then become what is known as "a weather bomb", which Mr Nolan says refers to a system which drops more than 24hPa in a 24 hour period.
It comes into force from around 3am on Friday and lasts through until midnight.
"These winds will then transfer rather rapidly across the country, with coastal counties seeing winds up to 130km/h". "We've got a wind warning which covers all the western side of the UK".
Edinburgh will see a very windy start to the day, but winds will slowly ease as the day progresses.
ESB's Senior Press Officer Paul Hand said thousands of homes and businesses are without power due to damage to power lines.
The yellow weather warning is in place until 11.45pm on Saturday.
Most of Britain will be drenched by torrential rain and battered by 50mph winds today as Storm Callum continues to wreak havoc on the country. "Gusts of 100 to 130 km/h are forecast across each county, with the strongest coasts along exposed coasts", forecasters said.
SOU celebrate Indigenous Peoples Day
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Hard to believe that it was only last Wednesday that warm sunshine bathed much of the United Kingdom, with temperatures reaching a high of 24.6C.
Winds will continue into tomorrow morning. However, it will stay stormy for a time on West and Northwest coasts with damaging gusts.
In Galway city, coastal routes along the harbour are closed as a precaution ahead of high tide at around 7.45am.
While the rain will have cleared, the weather will "turn quite cold" with a touch of ground frost in places and lowest temperatures of 2 to 5 degrees.
A Met Office spokesman said: "As Storm Callum passes to the northwest of the United Kingdom, a period of heavy rain will affect South Wales during Friday, with further spells of persistent and heavy rain at times during Saturday".
A number of Aer Lingus flights from Dublin have been cancelled this morning and there are ferry cancellations on Irish Sea crossings. The winds may arrive several hours earlier than expected.