Recent weather coverage has featured dramatic claims about a “super El Niño”, polar vortex, widespread snow, freezing temperatures and an enormous wall of rain.
But how closely do these headlines reflect the forecast? Here, we examine each claim against the outlook for the coming days and weeks.
“El Niño to smash Brits with polar vortex of snow and storms in dire warning”
This headline combines two large-scale climate and atmospheric influences to suggest that severe winter weather is imminent. However, neither El Niño nor changes in the stratospheric polar vortex provide a precise forecast for the UK on its own.
El Niño can increase the likelihood of wetter, stormier and generally milder conditions in the UK during late autumn and early winter. Later in winter, following the peak of El Niño, the stratospheric polar vortex can become weaker. This may raise the chance of Sudden Stratospheric Warming events, which can increase the potential for cold weather.
These are shifts in probability rather than guarantees. El Niño does not determine individual weather events, and the current forecast does not support the suggestion that the UK is about to be “smashed” by widespread snow associated with changes to the polar vortex.
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“UK weather maps show season's first snow in 12 areas after Polar Vortex forecast”
The short-range forecast contains no indication of widespread low-level snow across 12 areas. Wednesday is expected to bring rain across much of England and parts of Wales, while northern and north-western areas see sunny spells and showers. Temperatures will generally be close to, or slightly below, average during the day.
Although the conditions will turn cooler and showers could be heavy in the far north and northwest, this is very different from a confirmed outbreak of disruptive or extensive snow. There is also nothing in the forecast that indicates changes in the polar vortex. References to possible changes to the polar vortex are in relation to possible impacts of an El Niño which if they were to happen would be at the end of the winter. This should not be interpreted as a direct prediction of snow at specific UK locations.
“UK cold weather maps show -1°C freeze and heavy rain”
A chilly night is possible, particularly into Thursday, when there could be rural frost following clear spells and light winds. However, an isolated temperature shown on a weather map does not necessarily represent conditions across a wide area.
Rain will arrive in Northern Ireland during Thursday before spreading into other western areas later. Cloud and rain will then move east and southeast overnight, bringing notably milder conditions. Friday will be unsettled, with rain moving southeast across England and Wales and some heavy bursts possible, especially over western hills.
The forecast therefore supports a chilly start and spells of heavy rain, but not a prolonged or widespread freeze.
“Temperatures to plunge this week as autumn chill arrives”
Temperatures will fall from the mild conditions initially affecting southern areas on Wednesday, but “plunge” may overstate the scale of the change. Daytime values are expected to be close to or a little below average, with Thursday remaining near normal.
Friday’s temperatures should be mostly near average and could sit slightly above normal in the south and east. Saturday is likely to be rather cool in places, with blustery winds, sunny spells and scattered showers. This is a recognisably autumnal pattern rather than an exceptional cold spell.
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“Weather maps turn green and red as UK ‘disappears’ under 551-mile wall of rain and snow”
The forecast does show bands of rain crossing the UK, followed by showers. The wettest conditions are most likely in the northwest, while the southeast could receive relatively little rain during the period from Saturday 10 to Monday 12 October.
Strong winds are also possible, especially in the north, where there is a chance of gales. However, the outlook describes changeable weather with rain, showers and a likely interval of drier conditions, rather than the whole UK disappearing beneath an unbroken wall of rain and snow.
Looking further ahead, occasional rain or showers are most likely in western and north-western areas, interspersed with drier periods. More unsettled conditions may develop towards the end of October or early November, but confidence in specific patterns remains low.
The overall message is therefore one of changeable autumn weather: spells of rain, brisk winds, showers and some chilly intervals, but also drier periods. Dramatic nationwide snow and prolonged freezing conditions are not the central themes of the current forecast.
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