Wales On Sunday - - NEWS - CATHY OWEN Re­porter cathy.owen@waleson­

WALES is ex­pe­ri­enc­ing the first cold snap of the au­tumn – and there’s even been a bit of snow on high ground. There have been re­ports of heavy show show­ers on Snow­don and a dust­ing on the Pre­seli moun­tains as UK tem­per­a­tures fell to – 2.9°C overnight be­tween Fri­day and yes­ter­day.

Some of the show­ers have been caused by a weather phe­nom­e­non known as the Pem­brokeshire Dangler which brought win­try show­ers in parts as tem­per­a­tures dipped.

Welsh weather fore­caster Derek Brock­way said yes­ter­day: “Con­di­tions are per­fect for a ‘Pem­brokeshire Dangler’ to­day with a north wind and trough ly­ing through the Ir­ish Sea. If you’re un­der the Dangler you can ex­pe­ri­ence per­sis­tent heavy rain or snow, hail and thun­der too.”

The weather term is de­scribed as “a per­sis­tent, nar­row band of show­ers in the Ir­ish Sea”. The band of show­ers of­ten sit over Pem­brokeshire – hence the term “dangler”.

Ac­cord­ing to weather pre­sen­ter Liam Dut­ton, it is caused when a northerly wind blows down through the Ir­ish Sea and main­tains its orig­i­nal di­rec­tion over wa­ter. But when it ap­proaches land, fric­tion causes the northerly wind to change di­rec­tion slightly.

The fric­tion over land causes the wind di­rec­tion to change – and as the wind with an al­tered di­rec­tion col­lides with the northerly wind over the sea, it forces air up­wards to cre­ate clouds, mean­ing show­ers, spells of rain, snow or hail.

Mean­while, else­where in the UK, parts of Scot­land, County Durham and York­shire woke up to heavy snow yes­ter­day morn­ing.

The chilly snap will bring an end to the largely mild start to au­tumn.

Met Of­fice me­te­o­rol­o­gist Ai­dan McGivern said: “It will be a fairly chilly start, with tem­per­a­tures widely close to freez­ing and that means you’ll per­haps have to scrape your car wind­screen and you’ll see a frost in place first thing.”

Met Of­fice fore­caster Bon­nie Di­a­mond added: “We have had a pretty mild Oc­to­ber so far and a warm start to au­tumn in places so it will be a big change for ev­ery­body as we go through the week­end. longer

“Cer­tainly it’s time to get the warm win­ter clothes out.”

The cold snap co­in­cides with the an­nual Oc­to­ber change to Greenwich Mean Time, as the clocks went back early this morn­ing, giv­ing us all an ex­tra hour in bed.

The Met Of­fice fore­cast for to­day pre­dicts plenty of sun­shine af­ter a frosty start. There is the risk of one or two iso­lated show­ers, again per­haps win­try over the high ground.

It should feel a lit­tle less cold, with light winds, and a max­i­mum tem­per­a­ture of 11°C.

There will be a cold start to­mor­row, then fine, with plenty of sunny spells, but things could turn more un­set­tled from Tues­day on­wards with the risk of some rain. It will slowly turn less cold.


A res­i­dent of Lon­gacres, Brid­gend, scrapes ice off a car wind­screen yes­ter­day morn­ing


Heavy snow starts to fall in County Durham yes­ter­day

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