Storm Brian is expected to bring strong winds to southern and western areas early on Saturday morning.
Dave Reynolds, a forecaster for The Weather Company, said: "This storm is going to be large enough to affect the whole of the UK".
"The other concern is that spring tides combined with large waves may lead to overtopping along southernmost coasts", she said.
Craig Snell, a forecaster for the Met Office, said: 'We have had the first effects of Storm Brian this morning and we will see gusts reaching 40 to 50 miles per hour winds in London in the second half of the afternoon. These are expected to coincide with high tides, leading to locally risky conditions in coastal parts'.
Also known as explosive cyclogenesis, the weather bomb creates a jet stream of strong winds high up in the atmosphere which interact with the low pressure system.
However, the worst of the storm is due to reach our shores early tomorrow morning, when a status orange wind warning comes into effect for western and southern coastal counties.
The strong winds will also coincide with high tides "bringing the potential for unsafe waves", according to Met Office meteorologist Aiden McGivern.
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He warned thrill seekers not to risk their safety by posing for "storm selfies" along the coast.
National Rail warned the stormy weather could impact on train services, with emergency speed restrictions imposed on most of the routes in Wales.
The wild conditions, caused by a "weather bomb" over the Atlantic Ocean, have started battering Wales and the South West of England this morning, with gusts of wind reaching up to 70 miles per hour on the coastlines and 50 miles per hour inland.
A spokesman said: "Fallen trees and other debris may temporarily block railway lines and damage overhead wires".
BE EXTRA CAUTIOUS when driving on exposed roads, high ground and across bridges where again sudden gusts can blow you off course.
Storm Brian is supposed to hit areas of the United Kingdom tonight (20 October) and will pass through over the weekend.