Drivers are advised that Storm Eunice is expected to create severe driving conditions across much of England and a significant risk to vehicles in the South West, where National Highways has issued a Red Alert for gales in addition to a Met Office Red National Severe Weather Warning.

Yellow, amber and red Met Office warnings for wind have been issued in England for the storm, which is going to impact large parts of the country tomorrow (Friday). The National Highways Red Alert relates to the South West between 8am and 11am tomorrow.

Exceptionally strong winds are predicted around the Bristol Channel peaking tomorrow morning with 70mph – 80mph gusts, possibly reaching 90mph over the Avonmouth and Severn Bridges. This will lead to dangerous driving conditions for vulnerable vehicles with exceptional sidewinds and wind-blown debris. Road users are advised to avoid travel unless it's essential. There's a particularly high risk that high-sided vehicles and other vulnerable vehicles such as caravans and motorbikes could be blown over and National Highways, in conjunction with the Met Office, strongly advises these types of vehicles avoid the Severn Crossing, the M4 junction 22 to M5 junction 18, Stroud to M4, Avonmouth Bridge, and Clevedon to Bridgwater. There's a high likelihood of both Severn Crossings being closed tomorrow, with an impact on access into Wales via the M5 north and M50 south. While Storm Eunice's strongest winds will be in the south, there's an amber warning for wind in the north and a yellow warning for snow. Up to 20cm of snow could gather over high ground, with less significant accumulations in the lower ground. Brisk winds could create blizzard-like conditions and drifting of lying snow. This comes soon after the impact of Storm Dudley, which saw strong winds disrupt travel in large sections of the north, including a blockage caused by a fallen tree on the A64 and the closure of the A66 to high-sided vehicles. National Highways Head of Road Safety, Jeremy Phillips, said:

"For those who do travel, we're encouraging drivers to check the latest weather and travel conditions before setting off on journeys and consider if their journey is necessary and can be delayed until conditions improve. If you do intend to travel, then plan your trip and take extra care, allowing more time for your journey.

"In high winds, there's a particular risk to lorries, caravans and motorbikes so we'd advise drivers of these vehicles to slow down.

"Drivers of other vehicles should be aware of sudden gusts of wind which can affect handling and braking, and give high-sided vehicles, caravans, and motorbikes plenty of space. In the event of persistent high winds we may need to close bridges to traffic for a period, so please be alert for warnings of closures and follow signed diversion routes."

Unladen curtain-sided vehicles are particularly vulnerable to windy conditions on high ground. Curtains on empty high-sided vehicles can act as sails when closed, and when high winds arise HGV drivers are advised to open their curtain-sided vehicles if they're empty.

National Highways is advising drivers to pay attention to messages on the overhead electronic signs and listen for radio updates. Further information can be found by visiting www.trafficengland.com, following us on Twitter or calling the National Highways Information Line on 0300 123 5000. The latest weather forecast can be seen online at www.metoffice.gov.uk