20/02/2017 BBC Weather

little milder, but it will be a wet start and it will brighten up later.

As you have just seen, after a day in which some of you have been

shedding the layers, you will be putting them back on for the rest of

this week. Big changes ahead, all down to where the air has been

coming from. Today, it originated in the Caribbean, hence the name

tropical maritime air. Temperatures peaked at 18 degrees. But later this

week, the winds go to the north-west, a different source,

polar maritime air. Still over the sea, but from a colder place, so

temperatures will struggle. Bringing about that change, a strengthening

jet stream. At the moment, we still have tropical maritime air with us

across southern parts of the UK. With it, lots of cloud. Moisture

across parts of Wales, East Anglia and the south-east. Temperatures are

holding up. A chilly night from northern England, Scotland and

Northern Ireland, with clear skies. Maybe close to a frost in parts of

eastern Scotland, but mostly frost free. In these areas, we see the

best of the Tuesday sunshine initially. A better start in

north-west England compared with the day, but things will change to the

west. Rain will become heavy as the breeze picks up. Across Wales, the

Midlands and southern England, it will be a more grey day compared

with today. Patchy rain will become more persistent towards Devon,

Cornwall and West Wales later. But where you have the cloud, rain or

even sunshine, temperatures are above where they should be. We

finished the day with wet and windy weather across Scotland, Northern

Ireland and northern England. The weather front responsible for the

rain sits across England into Wednesday. But for all, the winds

will pick up into Wednesday. A deep area of low pressure to the

north-east of Scotland could bring costs. Colder air into Scotland,

Northern Ireland and northern England. Maybe even a few wintry

showers. But the southernmost counties will have another grey day.

Temperatures will be potentially still in the teens, but back to

where they should be further north. This is one to watch through the

week. A big area of low pressure potentially for Thursday. The

question is how windy it will get. If you have travel plans on

Thursday, stay tuned to the forecast. Once it clear through,

cold air is with us. So forget