21/04/2017 BBC Weather

the mid-teens. Largely dry for the marathon. Here is the outlook for

the weather marathon. Here is the outlook for

the weather for the next few days and Helen Willetts has the National

forecast. While unusual to see snow in May, it

will be a shock to the system. We've seen some interesting contrast. 19

degrees cost is in Scotland in the sunshine today. In the sunshine only

11. The differences we are behind a cold weather front. Seeing a stepped

down in temperatures. The cold air filtering sound so there will be a

widespread ground frost across the country. The week weather front

still with us so we could cheat patchy mist and fog. The best chance

of seeing the meteor shower overnight will be in those clear

skies further north. A better chance for south overnight. We start

Saturday morning with the line of cloud, the weather front from

Northern Ireland through Wales, the Midlands coming the south-east. The

clear air following the weather front. Slow to weaken and showers

may follow. It's likely we'll get good spells of sunshine in the

south-west, south-west Wales into the afternoon, where we see more

sunshine, we're temperatures of 16, possibly 17. Could be the odd

shower. More sunshine than today for some. Not perhaps for Northern

Ireland. That weather front never too far away. Largely dry with some

brightness, certainly through central and southern parts of

Scotland. Parts of the central belt with showers will make it feel

chilly. Here is a taste of what is to come. Clear skies filter further

south tomorrow night, then it means it'll be a cold night in the south

with ground frost here as well. A chilly start to Sunday. If you are

running the marathon, even if you have cloud, it'll feel chilly. Good

running weather. As the morning wears on its likely we'll see more

breaks in the cloud, becoming warmer into the afternoon for the late

runners. It means it looks like we'll see more sunshine around on

Sunday compared with Saturday and for Northern Ireland the same is

true. For northern Scotland things will change with the onset of heavy

rain and strong winds, still chilly air up in the Northern Isles. 14-16

because the sun isn't as strong this time of year as it is in August. The

high and light winds help it to feel warmer. We'll see another step down

as that Arctic air flows in behind our cold weather