The storm, caused by a "weather bomb" of low pressure in the Atlantic, has already struck the western coast of Ireland with heavy rain and is due to hit western parts of the United Kingdom at 4am on Saturday, as some families begin their half-term holidays. "I don't think it will hit Ireland as hard as it will hit the United Kingdom".
The Met said it now has no plans to issue an amber warning for any part of the United Kingdom, but the situation was "under continual review".
Wind gusts between 45mp and 70mph coinciding with high tides will likely have a strong impact along the coast, prompting fears of storm surges and floorings.
Sky News weather presenter Jo Wheeler said the disruption was likely to continue on Saturday as the storm "will bring 80mph gusts to south-western coasts".
'These are expected to coincide with high tides, leading to locally risky conditions in coastal parts'.
The forecast is for an intense low pressure system to bring a swathe of strong winds over southwestern areas of the county early on Saturday, steadily moving east through the morning and early afternoon.
The Met Office describes the phenomenon as similar to "the way that ice skaters spin faster by drawing their arms in" as they rotate.
Storms in the United Kingdom and Ireland are named alphabetically and Brian will follow September's Storm Aileen.
The Met Office has issued a yellow weather warning for high winds in Wales, the South West and the South on Saturday.
The wild conditions, caused by a "weather bomb" over the Atlantic Ocean, may cause coastal flooding and affect transport, the Met Office has warned. Short term loss of power and other services is also possible, it said.
Today, Network Rail also warned residents to tie down garden furniture during Storm Brian - to stop trampolines from blowing on tracks.