Met Eireann warned that the ferocious winds will hit Ireland from 10am before it batters Britain later tomorrow evening
A weather warning is in place tomorrow for counties Wexford, Clare, Cork, Kerry and Waterford.
Storm Barney is the second storm to be named under the “name our storms” project by the Met Office and Met Éireann, which asked the public to suggest names. The storm is being caused by a series of low pressure systems from the Atlantic.
The south of Ireland and Wales can expect the strongest winds on Tuesday afternoon, which will transfer to central and southern England on Tuesday evening.
"Barney will be a fast-moving storm, bringing locally strong winds to southern Ireland and the southern U.K. beginning midday Tuesday and continuing into Tuesday night," AccuWeather Meteorologist Eric Leister said
Winds will gust to 75 mph (120 km/h) in the areas hit hardest, including Cork, Waterford & Wexford through Tuesday night. Winds to this speed can down tree limbs, cause power outages and result in minor to moderate coastal flooding, especially at high tide.
Flight delays are possible at the height of the storm and could affect those travelling, so please check with airlines before travelling.
Rainfall from Barney will generally total around 25 mm (1 inch), but as much as 50 mm (2 inches) can fall in some areas.
Barney will depart Ireland on Tuesday night, but unsettled weather will continue in the days that follow.
"Right on the heels of Barney, the next storm will bring another round of gusty winds and rainfall to similar areas on Wednesday," Leister said.