The low-pressure weather system, which was named by Met Eireann yesterday, is expected to bring gales to southern parts of Ireland and the United Kingdom over the next 24 hours.
A separate Status Yellow wind warning is in place from 11pm today until 9am tomorrow for Connacht, Carlow, Kildare, Kilkenny, Laois, Longford, Wexford, Wicklow, Offaly, Donegal, Tipperary and Waterford.
The country's Met Office has issued amber warnings as wind gusts are expected to reach a potentially damaging 80mph.
"We have issued a yellow wind warning for parts of the United Kingdom where we're likely to see inland gusts of 45-55mph and stronger gusts of around 65-75mph in exposed coastal locations".
The storm will hit the south and south-west of the country hardest, with two Status Orange wind warnings issued for these regions.
The warning is due to start at 6pm on Friday and expire at 6am on Saturday.
Winds will also become strong and blustery from the northwest later tonight into Saturday with gale force gusts of 50-55mph as the storm moves east across Wales and central England.
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A Status Yellow weather advisory for potential stormy conditions is also in place for Cork and Kerry from 6 pm on Friday to 6 am on Saturday.
At least 10,000 households are without power and flights have been cancelled as a result of Storm Hannah, which arrived in the south west from the Atlantic this evening.
The forecaster expects winds to reach 130 kmph and widespread rain as the storm reaches its peak on Friday evening.
Yorkshire will experience increased winds, cooler temperatures and rain shows throughout Saturday as the storm moves across the south of England.
Friday night and Saturday morning will see an area of cloud and rain sweeping across much of the United Kingdom with blustery chilly NW winds for the rest of the day.
Evening showers, some possibly heavy and thundery, will die away to leave long clear spells.
Mr Wilson added: "Sunday should be a drier, brighter day with better temperatures".