Britain is set for plummeting temperatures this weekend, as cold air from the Arctic sweeps across Europe. A geopotential height and anomaly weather map from WXCharts shows the height of a pressure surface above mean sea-level. Heights are lower in cold air masses, and higher in warm air masses. A chart for the UK shows a colder air mass over the weekend, with the map turning purple on Saturday and Sunday, and deep blue on Friday.
Other weather maps for the winter have shown a low pressure area in the North Atlantic moving towards the UK and Scandinavia bringing wet conditions.
Meteorologist Andrej Flis explained: “That is a typical sign of a strong polar vortex.
“Over most of Europe, we see a broad high pressure area, and the west air flow across the UK and Scandinavia, just as expected from the general circulation forecast above.
“The colder air over east USA and west Europe, hints at two distinct low pressure areas, one over central Europe, and one over west Atlantic/east-southeast USA.”
UK Weather: the chart turns purple on Saturday and into Sunday (Image: WXCHARTS)
UK Weather: the chart is also a deep blue towards the end of Friday (Image: WXCHARTS)
“Such a scenario, would mean more snow for central Europe, especially the Alpine regions and northern Balkans. We don’t see colder temperatures over the Alpine/north Balkans region, but it is in the “war zone” between the cold and warm air.
“This usually drives the secondary cyclogenesis and brings snow to the region.“
Meanwhile, BBC Weather presenter Stav Danaos forecast “stormy” conditions on Saturday due to an area of low pressure.
The BBC forecaster said: “This area of low pressure is going to bring the stormy spell through Saturday we think, a real squeeze in the isobars through southern Britain.
UK Weather: the chart is also purple in parts of the UK on Sunday (Image: WXCHARTS)
“That could bring some disruption, along with that some very heavy and persistent rain hitting parts of Wales and England as we head through the course of the day.
“Also some very wet weather across northern and eastern Scotland, but it’s the winds we’re more concerned about across the south, gusts of maybe 60mph to 70mph, that could lead to some disruption and the potential for some damage here in places. Temperature wise around the seasonal average but you really won’t notice it because of the strength of the wind and the heavy rain which could cause some surface water flooding.
“Our area of low pressure starts to fill as we head on into Sunday, so it should be a better day than Saturday. Still a breeze day but the winds will be much lighter, there will be showers or longer spells of rain mainly across northern and eastern areas. Could see the sunshine becoming a bit more widespread into the afternoon across southern areas. Those temperatures again highs of 11C to 13C in the south.”
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