It is due to pass to the west of Ireland, northern England and Scotland during Friday.
Storm Callum came and, as of Friday afternoon/evening, will have left without too much bother.
Yellow Met Office warnings are in place for wind and rain in the Highlands and Islands and Strathclyde areas throughout Friday.
The other 13 counties have been issued with a yellow warning which will also end at 9am on Friday.More news: Storm Callum to BATTER Glasgow with heavy rain and strong winds
The Met Office has warned that homes and offices are likely to be flooded, and fast flowing or deep floodwater could cause a danger to life.
A storm that's been dubbed "Callum" will pass to northwest of the United Kingdom on Friday, bringing winds of up to 70mph and a prolonged downpour that will create hazardous conditions across the country.
It's warning southeast winds veering southwest will gust generally between 100 and 130km/h, higher in some coastal areas and on high ground.
Gusts of 50mph to 60mph could reach some places, with the chance of reaching 70 miles per hour around some coasts and hills.More news: Hurricane Michael left path of destruction, isn't done yet
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.
Chief Meteorologist at the Met Office Frank Saunders, said: "Strong winds at this time of year can increase the rate of leaf fall which can potentially block drains or culverts".
Along with a spell of heavy rain and high tides there's also a risk of coastal flooding and damage.
Arriva Trains Wales is planning to shut the line between 7am and 11am on Friday morning and in the evening.More news: Australia Aim to Start Well
Flooding is expected in parts of south west England, with two flood warnings in place, while people are advised to "be prepared" as flood alerts are in place in west south west and north of England, the Environment Agency said. They also warn of potential power cuts, possible delays or cancellations to train and bus services.