THE Met Office has upgraded its weather warning for later this week, predicting that an incoming storm could bring deep flood water.
Areas of high ground will be most affected, with the potential for a further 50-80 mm quite widely over hills.
A Northern Ireland hotel has also been badly damaged by Storm Callum.
Chief Meteorologist Frank Saunders, said; "Strong winds at this time of year can increase the rate of leaf fall which can potentially block drains or culverts and, with the heavy rainfall expected over Friday and Saturday, could well heighten the potential for flooding".
Windsor, the scene of Friday's royal wedding, was expected to escape the worst of the storm.
Gusts 50 to 60 miles per hour are likely in some places, with potential for gusts of 70 to 80 miles per hour around exposed coasts and hills.
The Met Office has issued an amber weather alert from 6am on Friday to 6pm on Saturday for South Wales and is warning of hazardous conditions. The Warningsford Road, Banbridge is partially closed due to fallen trees, while there are also reports of a fallen tree on the Hillsborough Road, Monyreagh.
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Road and rail users have been warned to expect disruption and delays.
Arriva Trains Wales is planning to shut the line between 7am and 11am on Friday morning and in the evening.
The organisation warned of danger from flying debris or falling objects and called on employers to assess the risk from the effect of storm conditions on their work activities, identify hazards and take necessary precautions.
Met Office Shawbury said wind was expected to pick up on Friday along with outbreaks of rain.
Wherever in the United Kingdom you are we want to hear how you have been affected and how you are coping or preparing now and throughout the winter.
Rain will then hit Edinburgh on Friday afternoon, becoming increasingly heavier into the evening.