Heavy rain is expected overnight
An area of low-pressure, now named Storm Conall by KNMI, which will bring rain to the south and southeast of the UK tonight, will continue to develop and strengthen as it moves east past the UK into the southern North Sea and will bring some strong impactful winds to the Netherlands during Wednesday.
However, the main impact here in the UK will be rainfall, heavy at times across parts of the south of the England and a yellow National Severe Weather Warning for rain valid from 10pm this evening until midday tomorrow has been issued.
Flood alerts are in place for the River Uck and The Cuckmere River
Met Office Chief Meteorologist, Steve Willington, said “Much of the warning area will see 15-20 mm of rain, with 30-40 mm in some areas. There is a lower chance of 50 mm of rain in a few places, more likely for areas such as the Isle of Wight, Sussex and Kent, before rain eases and clears by early afternoon. Given the recent wet weather, some disruption to travel and infrastructure could be possible.
“Along with the rain, things will turn colder from tomorrow for all, with frost and some freezing fog possible.”
Thursday will continue to see below average temperatures, with a cold, frosty and potentially icy start for some. Otherwise, it will be a fine day with light winds and a fair amount of sunshine in many areas, although freezing fog patches could persist in a few places.
How long the more settled, colder conditions will last is uncertain, with rain probably returning to westernmost areas at least by the end of the week.