"The strongest winds are expected across Northern Ireland during the morning".
The Met Office has issued an amber warning for heavy rain in south Wales, which could see the worst of the heavy winds.
With Storm Callum thrashing the United Kingdom with torrential rain and gale force winds, bookmaker Coral has been forced to slash odds on this October being the wettest on record.
A yellow rain warning is in place from 6am to midnight on Friday for heavy, slow moving, rain that will affect the North West, including Blackpool, Cumbria and Lancashire.
Storm Callum was expected to bring gales of up to 130kmh, with coastal areas bearing the brunt of the weather, which attracted a status yellow warning.
'This morning, South East England woke up to temperatures in the high teens, and in London temperatures are already in the 20s.
A 36-hour amber warning for Wales has been issued where almost a month's rain could fall over 48 hours.
Coasts on the South and Western parts of the country are set to be most badly affected.
Carlow, Kilkenny, Wexford and Wicklow are expected to experience heavy and persistent rain throughout the day.
"This is where we'll be seen a zone of rain overnight".
Yesterday evening saw Met Éireann issue orange warnings for 13 counties with the arrival of Storm Callum last night.
The train operator said: "Due to the severe disruption to train services, lack of available road transport caused by local road conditions, customers are advised not to travel as journey completion can not be guaranteed".