The midweek warmth will not be with us by the weekend. After seeing temperatures into the low to mid twenties for parts of Britain, there will be a chilly dip on Thursday night with a frost. Friday will start with light winds, sunshine in the north, but increasing high cloud from the southwest. Ireland will turn wet and windy during Friday as a low pressure edges in from the Atlantic. Rain will reach over Northern Ireland, into Wales, with damp weather for the Cumbrian Fells and southwest Scotland. Much of Britain will have a fair day, but it will feel colder as the air is from near Greenland rather than the midweek Iberian source.
If you find a sheltered sunny spot, the sunshine will feel warm but in the breeze, the shade or after dark there will be a definite coolness.
The southerly winds will strengthen during Friday evening with gusts over 60mph for exposed coasts and hills for Northern Ireland and western, then northern Scotland. As the low centre moves to the northwest of Ireland, the frontal rain will become heavier. This will move from Northern Ireland over the western counties of Britain with a clearance behind. There could be embedded line convection with sudden gusts and intense downpours from Northern Ireland to western Scotland by midnight.
Coastal gales are possible with snow over the Scottish mountains. It will feel cold under the clear skies following the frontal rain but the winds will pick up again for the north coast of Ireland and the Scottish Islands. Southeast Britain will have lighter winds and milder air just pulsing across the Channel. So even though there will be frontal cloud, it shouldn’t be cold on Saturday morning for London and the Home Counties.
The low centre will remain to the northwest of Scotland, where there will be windy and showery conditions. Away to the southeast of Britain, it will be quieter, with lighter winds but some uncertainty about the rain from the frontal band. The rain band will be continuing across Britain overnight and clearing away into the North Sea on Saturday morning.
Currently, it looks like there will be heavy rain over Aberdeenshire around dawn and rain into NE England. The band will move over the Northern Isles with a wet spell and bring heavy showers to East Anglia on Saturday morning. That is the cold front but there is a curl back around the occlusion with more unsettled weather away to the northwest. There will be strong winds and sudden gusts for western and northern Scotland closer to the low centre on Saturday, all clearing away northwards by teatime.
The day won’t feel restful with a scattering of showers and medium-level cloud, so not endless sunshine. There will be a few showers but a good deal of fair weather. The winds will be lighter for southern Britain with temperatures around 11 to 14C which is nothing compared to the 24.8C for north Wales on Tuesday.
Sunday looks blustery with showers and bright spells. There will be a further update on Thursday.
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