"A spell of strong winds is expected, initially mainly in the far southwest of England and across western Wales".
We are only just getting rid of the remnants of tropical storm Helene, which brought gusty winds but also an unusually warm start to the week.
Its warning - in force between 6pm on Monday and midday on Tuesday - said "very strong winds" could pose the risk of "injuries and danger to life" because of flying debris.
The warning says some damage to trees is possible, as are some delays to road, rail, air and ferry transport.
A previous yellow weather warning in place for Monday and Tuesday was downgraded over the weekend.
Gusts of 50 to 60 miles per hour are possible inland, with some exposed areas up to 75mph, which could cause serious damage to infrastructure and risk to life.
A similar section of Wales and the Cornish peninsular are also expected to bear the brunt of any storm-like weather, although much of the rest of England could be noticeably windier by the time Helene hits land on Tuesday morning.
The warning is in place between 6am and 10pm on Wednesday, September 19.
The weather forecast for Wednesday is not part of Storm Helene, which will have moved on.
"The colour might change as we get closer to the time".
A smaller hurricane dubbed Isaac is reportedly heading for the Caribbean, while Hurricane Helene - now also in the Atlantic - is forecast to track towards the UK.
A spokeswoman said: "Basically Helene is in the Atlantic at the moment and is crossing the Atlantic and is expected to track towards the UK".
Coral spokesman John Hill said: "With the threat of Hurricane Helene reaching the United Kingdom and following a flood of bets over the past couple of days, the odds have been cut on this month ending as the wettest September on record".