The United Kingdom is poised to experience its warmest day of the year on Wednesday, with temperatures potentially soaring to 20C in some regions. This follows a period of colder Arctic air that has recently pushed temperatures down across the nation.
Warmest Spots in West Wales and Western England
According to the Met Office, the highest temperatures are forecast for west Wales and western England. Under predominantly sunny skies, these areas could see thermometers reach between 18C and 19C, with a possibility of hitting 20C. This would surpass the current year's high of 19.2C recorded in Northolt, London, in early March.
Weather Patterns and the Foehn Effect
Dan Harris, the chief forecaster at the Met Office, explained that the warming trend is partly due to the Foehn effect. This meteorological phenomenon occurs when east to south-easterly winds pass over higher ground, leading to a significant temperature increase on the leeward side. Harris noted, "Wednesday looks likely to be the warmest day of the week for many, with high pressure dominant."
He further highlighted the expected diurnal range this week, referring to the difference between maximum daytime and minimum overnight temperatures. Due to clear skies during the day, nights are anticipated to be chilly, with some locations potentially experiencing air frost after the warmer daytime conditions.
Regional Variations and Forecast Details
While England and Wales are set to enjoy brightening skies and warm weather, most of Scotland and Northern Ireland will likely retain thicker cloud cover and could see further outbreaks of rain. The contrast means that some parts of the UK will be warmer than popular European destinations like Barcelona and Athens on Wednesday.
The forecast indicates that Tuesday will start cloudy for many, with drizzle over western hills and rain moving into northwest Scotland and Northern Ireland later. However, conditions will dry out elsewhere, becoming increasingly sunny across England and Wales, feeling warm in the sunshine.
Outlook for the Rest of the Week
Looking ahead, Thursday is expected to bring another warm day, though temperatures will drop slightly from Wednesday's peak. The Met Office predicts that by Friday, temperatures will cool towards the seasonal average, with mostly dry conditions and sunny spells persisting through Saturday.
Overnight, rain is forecast to gradually ease across Scotland and Northern Ireland, while clear skies elsewhere may lead to mist, fog patches, and rural frost in England and Wales. The overall outlook for Thursday to Saturday remains settled, with chilly mornings and potential mist or fog patches as temperatures moderate.
