Week Ahead 23/06/2025 - Turning humid again in the south - video Dailymotion

Met Office

This is the Met Office UK Weather forecast for the week ahead 23/06/2025. Last week's heat has been swept away by cooler and more changeable westerlies but higher temperatures and more humid air is never too far away to the south. Bringing you this w

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00:00Hi there and welcome to the Met Office week ahead forecast. It's often at this time of

00:04year that we see what has been termed a return of the westerlies, in other words, a return

00:09of more of an Atlantic influence on the UK's weather, a pick up in the strength of the

00:13jet stream following a lull in activity that we often see during the spring and the first

00:19part of June. Generally at this time of year, temperature contrasts across the normal hemisphere

00:25begin to increase again and that tends to fuel a stronger jet stream.

00:29I'm going to be talking about the jet stream a fair bit over the next few days. Indeed

00:33it is the westerly winds that have swept away the heat that peaked on Saturday in Surrey,

00:3933 Celsius, widely low 30s across many southern and eastern parts of the country, culminating

00:45in quite extensive thunderstorms, frequent lightning and hail across parts of northern England and

00:51southern Scotland. Nevertheless, cooler air now in place as we start the week and we

00:55keep that cooler air for Monday night. But as we begin Tuesday, a sign of something a little

01:02more humid returning with this warm front moving into western parts of the country by dawn, bringing

01:08extensive cloud cover and outbreaks of persistent rain across parts of Scotland, northern England,

01:14Wales, the southwest and northern Ireland. The rain during the morning tend to fizzle. It's always

01:19going to be wettest over western hills, drier towards the south and east and brightening up

01:24slowly into the afternoon. Some sunshine reappearing through south and east Wales, the middle and east

01:29Anglia and the south. Some brightness there for northern Scotland as well, albeit with some showers.

01:34Feeling cool in the north, but warmer and more humid to the south. And the dividing line between the

01:40more humid air to the south, the cooler, more changeable weather to the north. It's this cold front and

01:45really that sets the scene for the rest of the week. We're going to see this north-south contrast,

01:49staying cool and changeable in the north, often more humid towards the south with some sunshine at

01:54times. And this dividing line will ebb and flow north-south across the country because that's where

02:01the jet stream will be sitting. On Wednesday we start the day with some sunshine in the far southeast

02:06and across parts of Scotland and northern England, but a few showers here and there. More extensive cloud

02:11through Wales and the Midlands. Some outbreaks of rain during the morning, easing into the afternoon.

02:16And look at the temperature contrast. Again, high teens, low 20s in the north, but 27, 28 Celsius

02:21towards the southeast and feeling very humid once again. And that high humidity could lead to the

02:27development of some thunderstorms across northern France drifting towards southeast England. The exact

02:31track of these thunderstorms on Wednesday evening, early hours of Thursday, open to doubt at the

02:37moment. There's every chance that they will hit the southeast of England and bring some impacts, but if they just

02:45go in slightly more of an east direction, then they'll miss southeast England entirely. So that's something

02:50we're going to be keeping a track of over the next couple of days and we'll keep you updated. Elsewhere across the

02:55UK, we've got some weather fronts moving through overnight, bringing some showery rain and more of a brisk

03:01west of the airflow by the start of Thursday. But those outbreaks of rain and the early showers move

03:08through. It brightens up nicely by late morning and into the afternoon. Some sunny spells and it's going to

03:14feel a little cooler once again. Certainly we'll notice an uptick in the winds and could affect some of the

03:21setup for Glastonbury. But otherwise it's going to be a cooler day with temperatures back to the low to mid

03:2820s. Now, on the other side of the Atlantic, meanwhile, over North America, this is Tuesday, we've got this

03:34developing jet stream really picking up strength across North America and subtle differences in how this develops

03:41during Tuesday and Wednesday will impact our weather for the rest of the week. But it looks likely that an unseasonably

03:47strong jet stream will develop across the North Atlantic and head towards the UK for the end of the week. And that's going to

03:53bring that strengthening of the wind that I mentioned on Thursday and into Friday. We keep those keen

03:59breezes from the west. It's also going to bring outbreaks of rain predominantly as we start off Friday

04:05across Western Scotland, Northern Ireland, Northwest England and parts of Wales, drier to the south on the

04:12other side of the jet stream. And throughout the day on Friday, I suspect that there will be some brightness

04:17to be had across eastern and southern parts of the UK. But it looks likely that we're going to see

04:24what's going to be quite cool, I suspect, where we get those outbreaks of rain across Western Scotland

04:30and northwest England, high teens, low 20s, towards the south and southeast, feeling quite humid once again,

04:3724, 25 Celsius drying up there across the southwest for Glastonbury, Worthy Farm. And warming up as we go into the

04:47weekend across many southern parts of the UK at least, we've got this ridge of high pressure trying to nudge in

04:53from the south, pushing the jet stream further north for a time, and in fact, allowing the jet stream to take more of a

04:59southwesterly path, and that would import higher humidities and higher temperatures into southern areas whilst it stays

05:06cool and changeable further north. So that's how things are looking into the weekend. There's every possibility that that

05:12high pressure will become more widespread later in the weekend and early next week to bring perhaps another

05:19short-lived hot spell, particularly towards the southeast. But it probably won't last long because

05:26the jet stream always wanting to return to the UK's shores, and that looks more likely than not for the rest of

05:32next week. We'll keep you updated, of course, right here at the Met Office. Follow those updates on YouTube. Bye-bye.

Week Ahead 23/06/2025 - Turning humid again in the south

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