Revellers 包む-up for winter solstice as snow is 始める，決める to bless northern parts of UK with a white Christmas... while most can 推定する／予想する rain and 霧 on Dec 25

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Britons 示すd the winter solstice today with a swim at the beach and yoga 開会／開廷／会期s outside an?11th century 城 to 証言，証人／目撃する the 夜明け after the longest night of the year as hopes continued to build for a white Christmas.

勇敢に立ち向かう swimmers went for a 下落する at Portobello Beach in Edinburgh this morning, while other 早期に birds took part in a yoga 開会／開廷／会期 at the 国家の 信用's Corfe 城 in Dorset to watch the sunrise.

The winter solstice for the northern 半球 示すs the start of 天文学の winter and the day with the shortest 量 of daylight - Shetland 存在 the most extreme example with just five hours and 49 minutes.

It comes as parts of Britain 直面する a 'whiteout' Christmas with snow 推定する／予想するd to start 落ちるing as 早期に as tonight to 先触れ（する） a wintry run-up to Christmas Day and beyond - although which 地域s will be 攻撃する，衝突する worst is still in 疑問.

Scotland, the far North of England and Northern Ireland are the areas most likely to enjoy a white Christmas on December 25, 特に on higher ground, with 気温s 推定する／予想するd to 減少（する） as low as -6C (21F).

It comes after the UK's coldest night of the winter for the third night in a 列／漕ぐ／騒動, with -9.3C (15.3F) at Braemar in the Cairngorms last night, after -9.1C (15.6F) on Sunday night and -8.9C (16F) on Saturday night in the same village.?

(From left) Charlotte Gardiner, Sasha Udell, Andrea Taylor, Clare Donoghue, Patricia Yeyti and Agnes Pachacz 参加する a winter solstice swim at Portobello Beach in Edinburgh today to 証言，証人／目撃する the 夜明け after the longest night of the year

People gather on Glastonbury Tor in Somerset this morning on the day of the winter solstice to watch the sun rise

People 参加する a winter solstice yoga 開会／開廷／会期 at the 国家の 信用's Corfe 城 in Dorset to 示す the solstice today

People gather on Glastonbury Tor this morning on the day of the winter solstice in the northern 半球

The winter solstice for the northern 半球 示すs the start of 天文学の winter and the day with the shortest 量 of daylight - Shetland 存在 the most extreme example with just five hours and 49 minutes

This graphic from the Met Office shows 冷淡な 空気／公表する moving in from the north, but milder 空気／公表する 長，率いるing in from the south-west

But the Met Office 認める that it was still 不明瞭な 正確に／まさに where the 境界 between 冷淡な and milder 空気／公表する will be, 説 that this was '重要な as to where can 推定する／予想する any snow over Christmas'.

条件s are 予測（する） to become more unsettled from tomorrow, with 禁止（する）d of rain 推定する／予想するd across the UK. Sleet, snow and ice are 予報するd over higher ground in Scotland before more snow is 推定する／予想するd on Thursday.

Blizzards could be in 蓄える／店 in Scotland on Christmas Eve thanks to strong 勝利，勝つd. Edinburgh and 物陰／風下d are 共同の favourites with William Hill for snow at 4-9, with Newcastle, Birmingham and Manchester all at 10-11.

Areas その上の south are 推定する／予想するd to remain 穏やかな and cloudy with some rain, and there is also the 危険 of 霧 across southern parts of England and むちの跡s on Christmas Eve, which could 影響する／感情 travel.

The Met Office is uncertain about where Britain's snow '境界' might be ? between 雪の降る，雪の多い and 非，不，無-雪の降る，雪の多い parts of the country ? but its 公式の／役人 Christmas 見通し, 予報するd Scotland is the most likely place to see snow.

The 境界 will be driven by 強化するing northerly 勝利，勝つd during Christmas Eve.

They will make it feel very 冷淡な, with the chance of blizzards over high ground.?

In the south, 穏やかな 空気／公表する remains in place, with cloud and （一定の）期間s of rain from the west.

The 'blizzard' 予測（する） for Scotland could precipitate 厳しい 天候 警告s for the festive period.

気温s will 下落する through the week, with 夜通し 凍結するs as 冷淡な as -6C (21F).

Helen Caughey, 副 長，指導者 気象学者 at the Met Office, said: 'With colder 空気／公表する 会合 milder 空気／公表する over the UK, the 明確な／細部 詳細（に述べる）s of the 予測（する） for Christmas Day are still a little uncertain.

'Milder 空気／公表する moves north-east over much of the country by the middle of the week, with （一定の）期間s of rain for most at times, which will turn to snow over higher ground in northern Scotland 最初.

People 参加する a winter solstice swim at Portobello Beach in Edinburgh this morning to 示す the occasion

A woman feels the 冷淡な as people 参加する a winter solstice swim at Portobello Beach in Edinburgh this morning

(Left to 権利) Agnes Pachacz, Sasha Udell, Charlotte Gardiner and Andrea Taylor at Portobello Beach in Edinburgh today

Charlotte Gardiner, Sasha Udell, Andrea Taylor, Clare Donoghue, Patricia Yeyti and Agnes Pachacz in Edinburgh today

People 参加する a winter solstice swim at Portobello Beach in Edinburgh this morning to 証言，証人／目撃する the 夜明け

Swimmers 参加する a winter solstice swim at Portobello Beach in Edinburgh this morning 示す the day

People 参加する a winter solstice swim in Edinburgh today to 証言，証人／目撃する the 夜明け after the longest night of the year

Swimmers go into the water for a winter solstice swim at Portobello Beach in Edinburgh this morning

'The 境界 between the milder and colder 空気／公表する is then 予測（する） to 沈む south later on Christmas Eve and through Christmas Day, introducing colder, clearer 条件s for some.

'However 正確に／まさに where this 境界 gets to is hard to pin 負かす／撃墜する at the moment, and is 重要な as to where can 推定する／予想する any snow over Christmas.'

Bookmaker William Hill today made Edinburgh and 物陰／風下d 4-9 favourites for a white Christmas in 2021, 追加するing that all 13 major UK airports are now at their lowest level in over a １０年間.

The 集団の／共同の 調書をとる／予約する on a white Christmas is 11-4 or shorter, which the company said is かなり lower than the 普及した White Christmas in 2010, when there was snow on the ground at 83 per cent of 駅／配置するs - the highest 量 ever 記録，記録的な／記録するd - but snow or sleet also fell at 19 per cent of 駅／配置するs.

William Hill 広報担当者 Rupert Adams said: 'As ironic as this may sound, we're now seeing 予報官s slowly warming to the idea of a white Christmas.

People 参加する a winter solstice yoga 開会／開廷／会期 at the 国家の 信用's Corfe 城 in Dorset this morning

国家の 信用's Corfe 城 in Dorset is pictured as people 参加する a winter solstice yoga 開会／開廷／会期 this morning

Corfe 城, pictured today, dates 支援する to the 11th century and was one of the first to be built at least partly from 石／投石する

People 参加する a winter solstice yoga 開会／開廷／会期 at the 国家の 信用's Corfe 城 in Dorset this morning

Corfe 城's 丘の頂上 position helps make it a popular tourist 目的地 - and a yoga 開会／開廷／会期 was held there today

People 参加する a winter solstice yoga 開会／開廷／会期 at the 国家の 信用's Corfe 城 in Dorset this morning

People 参加する a winter solstice yoga 開会／開廷／会期 at Corfe 城 in Dorset to 示す the solstice this morning

'There has been a 静かな 信用／信任 about the prospect, behind の近くにd doors, for some time, but many have been unwilling to 火刑／賭ける their 評判 on it.

'As soon as we ticked into the 決定的な five-day window of 存在 able to 予測（する） snow, those calling snow on the big day got a bit louder and as a consequence punters have been indulging in a festive flurry ぱたぱたする with 新たにするd 信用／信任.'

The company said all that is needed to technically 宣言する a white Christmas is the 観察 of a 選び出す／独身 snowflake 落ちるing in the 24 hours of December 25, at one of 13 major UK airports.

There have been white Christmases in four of the past six years, but they 伴う／関わるd only a small number of 場所s.

William Hill 追加するd that since 1960, there have been only four occasions when at least 40 per cent of UK 測候所s have 報告（する）／憶測d snow on the ground at 9am on December 25 ? those 存在 1981, 1995, 2009 and 2010.