21 January - National weather forecast presented by Aiden McGivern.
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00:00Hi there. During the rest of Tuesday it's relatively quiet across the UK ahead of a
00:06potentially disruptive system arriving by Friday now named by the Met Office as Storm
00:11Erwin. Here's how Storm Erwin evolves. It's a fairly classic setup in which we've got
00:17cold air outbreak across North America clashing with much warmer air further south strengthening
00:23the jet stream to speeds of more than 200 miles an hour or even 250 miles an hour in
00:29places and that tends to pick up this area of low pressure which meanders across the
00:34Atlantic for a day or so before it crosses onto the cold side of the jet stream and rapidly
00:39deepens and look at how many isobars are on that low by the time it reaches northwestern
00:44parts of the UK by Friday. So northern and western parts of the UK certainly at risk
00:50of disruption from this system and warnings have already been issued. I encourage you
00:55to stay up to date with those Met Office weather warnings over the next few days because I'm
00:59sure they'll be updated and we'll keep you updated right here at the Met Office on our
01:03social media channels and YouTube. But for the time being, Tuesday afternoon relatively
01:09quiet compared with what's to come. A lot of cloud remains across England and Wales.
01:13Some moderate to heavy rain for North Wales into northern England along with a decaying
01:18and slow moving frontal system. One or two light showers towards the southwest but there'll
01:23also be showers into western Scotland and Northern Ireland. These will be slow moving
01:27away from the showers across Scotland and Northern Ireland. Some decent sunny spells,
01:31the best of which will be across eastern and southern Scotland as well as eastern parts
01:35of Northern Ireland. 7 or 8 Celsius in the north. I think 4 to 5 where we've got some
01:40stubborn low cloud further south and some mist continuing into the afternoon. Little
01:46change or at least slow moving changes overnight. The front across central areas slowly starts
01:52to move south. Meanwhile, thickening of the cloud in the south will bring some outbreaks
01:56of rain to southern England into the Midlands and East Anglia. This patchy rain also accompanied
02:02by some mist or even fog in places. Further north, Scotland and Northern Ireland under
02:06any clear spells because of relatively light winds, we will see a few frost and fog patches
02:13by dawn with the lowest temperatures expected across eastern Scotland. Otherwise, mostly
02:19three or fours across the country. Now we start Wednesday with a lot of cloud once again
02:24through central and southern parts. The Midlands, East Anglia and the south sees patchy drizzly
02:30rain for a time before brighter skies arrive from the north and west and some decent sunshine
02:36at last for Wales and western England at least. Scotland and Northern Ireland still seeing
02:41one or two showers and the odd shower turning up into western coast as well. But eventually
02:45by the end of the day, the cloud and rain is starting to peel away from the south. It's
02:50going to feel a little bit colder I suspect in places although more pleasant where we
02:55do manage some sunshine. And then into Wednesday evening, those clearer spells across northern
03:01and western parts of the country do become more widespread. As a result, some frost and
03:06fog to wake up to by Thursday although Thursday brings with it a spell of rain that opens
03:12the door to the more changeable Atlantic weather with the very unsettled weather expected to
03:17come along for Friday. A spell of rain and for northern parts of the UK, hill snow and
03:23those disruptive winds that I already mentioned. Stay up to date right here at the Met Office.