A very intense low pressure system is forecast to run northeastwards across the country early on Monday, bringing the potential for an exceptionally windy spell for southern parts of the UK. At the same time, persistent, heavy rain could cause some surface water flooding, while the winds will lead to some very large waves around our coasts.
There remains some uncertainty in the timing, intensity and track of the low. However, the public should be prepared for the risk of falling trees as well as damage to buildings and other structures, bringing disruption to transport and power supplies.
A developing storm is expected to reach the UK later on Sunday. This is expected to run northeastwards, probably across England and Wales during Monday, with very strong winds on its southern and western flanks. [hi-lighty:zx9djqcn]There is the potential for gusts of 60-80 mph quite widely and locally over 80 mph, especially on exposed coasts, both in the southwesterly winds ahead of the low centre and west to northwesterly winds behind it.[/hi-lighty:zx9djqcn]
20 to 40 mm of rain may fall within 6 to 9 hours, leading to localised flooding, especially where drainage is impeded by wind-blown debris.
This warning will be updated Sunday morning.