Storm Brian will be the second named storm of the season, following Aileen which affected parts of the United Kingdom from 12-13 September.
The worst effected areas include Munster, Dublin, Carlow, Kilkenny, Louth, Wexford, Wicklow and Meath, with rain expected to reach between 30 and 50mm.
He says that while the GFS charts show storm Brian's track staying just south of the Midlands, meaning the Midlands could escape the worst of it, but would still see gusts of possibly 100kph, the OPC model however places the Midlands directly in the path the storm, meaning that wind speeds could gust closer to 120kph.
How will Storm Brian impact on United Kingdom weather?
There will be travel disruption and the risk of trees falling, but winds are expected toe ast through Saturday night.
It warned some coastal areas in the United Kingdom could be affected by large waves, with the potential for flooding.
A Yellow wind warning has been issued in the United Kingdom just a day after the Irish Met Office declared an Orange warning for parts of the Republic.
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Storm Brian is expected to affect much of southern and western England and south and west Wales from early on Saturday morning. "Short term loss of power and other services is also possible".
"Gusts exceeding 50mph are expected widely within the warning area, with gusts of around 70mph along exposed coastal areas".
Ophelia caused three deaths and left thousands without power, so it's no surprise the rest of the United Kingdom is preparing for the worst.
"These are expected to coincide with high tides, leading to locally unsafe conditions".
Storm Brian, now over the mid-Atlantic, will "undertake explosive cyclogenesis" over the next 24 hours, according to the Met Office, meaning the low pressure cyclonic weather system will see a rapid collapse in pressure.
The Met Office describes the phenomenon as similar to "the way that ice skaters spin faster by drawing their arms in" as they rotate.