The warning runs from 5am on Friday February 18 to 9pm the same day and is for 'extremely strong winds' caused by Storm Eunice which 'may cause significant disruption'.
The Amber warning states:
- There is a good chance that flying debris could result in a danger to life
- Damage to buildings and homes is likely, with roofs blown off and power lines brought down
- Roads, bridges and railway lines are likely to close, with delays and cancellations to bus, train, ferry services and flights
- There is a good chance that power cuts, possibly prolonged, could occur , perhaps affecting other services, such as mobile phone coverage
- It is likely there will be falling branches and some uprooted trees
The Met Office forecast states: "Extremely strong winds are expected to develop over southwest England early on Friday, before spreading north and east during the day.
"Inland wind gusts widely in the 60-70 mph range but up to 80 mph in a few places.
"Around coasts of west Wales and southwest England, gusts of 80 to 90 mph are possible.
"Winds are expected to ease across western areas through the afternoon, and eastern areas during the evening."
A Red warning was issued for some coastal areas in the South West of England, which means there is a danger to life from flying debris and a high chance of damage to buildings and trees.
A further Red warning was issued early on Friday morning for parts of the South East including London and Kent.