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Old 28-12-2016, 12:12
Steffan_Leach
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Frost here this morning!

First one of the month.

Thought we might get away with having no frost this December, but nope, Jack Frost had to pay a visit at the last moment...

There's hardly a cloud in the sky though so the sunshine and clear skies do make a nice change. It definitely looks nicer than the dismal grey skies we usually get here - even If it nay not feel nicer!

The frost has melted where the sun is shining but in the shady spots it's still there.

It's Currently down to 15.5c here in the hallway as I don't have the heating on during the day but as my living room and dining room are South facing whenever the sun shines they stay warm.
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Old 28-12-2016, 15:01
Steffan_Leach
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Record breaker!

The current sea level pressure here (S Hants) is 1044 millibars and it reached 1044.5 mb at 11:30 am. The latter rounds to 1045mb and is the same as nearby Southampton Airport.

It appears to be the highest at this location for at least the ten years of my recordings here, the previous record being 1043 mb. Also had only my 2nd air frost of the month, -0.8C, the first being on Dec. 1st.
Yup, very high pressure here too. It also reached 1044mb here at my nearest weather station yesterday, the highest I've ever recorded as well, though I've only been observing the weather since September..

http://www.metoffice.gov.uk/public/w...tion/gcwdjeczy


Temperatures also dropped to a bone-chilling -4.8°C at Linton-On-Ouse this morning, and the temperature has only reached positive figures by noon.

http://www.metoffice.gov.uk/public/w...tion/gcx57w9fb


The BBC Weather App says the maximum temperature for today will be 3°C for my town.
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Old 28-12-2016, 15:04
d'@ve
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Some places in the south of England reached 1045 mb in the High pressure yesterday, which appears to have been the highest for 20 years and perhaps the second highest in the region for about 50 years. Most unusual, and it feels nice and fresh. I love this kind of high pressure but the centre is slowly drifting into the continent now.

No air frost last night here though, only a ground frost and it's currently up to +8 deg C, sunny and quite pleasant for the time of year.
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Old 28-12-2016, 15:07
Steffan_Leach
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Latest Weather here:

Weather Observations
Observed at 14:00, Wednesday 28 December
Sunny
5°C
WIND SPEED 2 MPH EASTERLY
Humidity: 82%
Visibility: Good
Pressure: 1039mb, Falling
Observation station: Bingley Samos
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Old 28-12-2016, 15:11
blueblade
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Some places in the south of England reached 1045 mb in the High pressure yesterday, which appears to have been the highest for 20 years and perhaps the second highest in the region for about 50 years. Most unusual, and it feels nice and fresh. I love this kind of high pressure but the centre is slowly drifting into the continent now.

No air frost last night here though, only a ground frost and it's currently up to +8 deg C, sunny and quite pleasant for the time of year.
I got 1043 millibars here in Chelmsford. Exceptionally high pressure.

1041 now. Partly sunny 4.4C. Calm, or virtually so.
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Old 28-12-2016, 17:16
d'@ve
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looking urgh next week...

mean northwesterly flow looks set to bring a mixture of very cold (like next monday) to just average cold, as systems cross the uk on the northwesterly. so cold northerlies, less cold westerlies, wind rain and wintriness on hills, mixed with sun/showers, wintry on northern hills, but average - cold.
Yes, I see that too in model watching, especially when looking at the broader northern hemisphere picture for 850 mb and 2m temperature levels. The polar cold 'oval' is predicted to shift more towards the European side of the pole from the pacific side and that would mean colder air into Eastern Europe as well further south to the north of Scotland. So the chances of a very cold spell increase accordingly, if and when we get airmasses originating from those two directions.

Fingers crossed time for the 'cold' lovers but of course, we would need better synoptics than we see at the moment to drag the really cold air over us for any length of time.
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Old 28-12-2016, 19:26
nic6
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-1 celcius was forecast for Bedford last night whereas in reality it went down to -4, tonight the BBC and Met office say 0 Celcius but it's obviously going to drop lower than that.
A calm wind, clear skies high pressure..
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Old 29-12-2016, 06:15
Rich Tea.
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An extraordinary Christmas holiday period of rapid extremes from the exceptional mildness, cloud and wind of Christmas Day to the severe hoare frost, clear sunshine and calm conditions literally two days later.

Well, looks like you got your wish....

12°C and cloudy currently in Newport.

http://www.bbc.co.uk/weather/2641591

At least it'll get much colder after Christmas with some frost likely as well.
My Christmas Day here came in at exactly 13.0c which was 1c less than last year's maximum value hit.

As I'm writing at 6am the temperature has dipped to -4c, exactly the same as 24 hours ago when it was again -4c here. The contrast with the 11.2c at this time on Christmas morning is remarkable, a 15c difference.

Record breaker!

The current sea level pressure here (S Hants) is 1044 millibars and it reached 1044.5 mb at 11:30 am. The latter rounds to 1045mb and is the same as nearby Southampton Airport.

It appears to be the highest at this location for at least the ten years of my recordings here, the previous record being 1043 mb. Also had only my 2nd air frost of the month, -0.8C, the first being on Dec. 1st.
Some places in the south of England reached 1045 mb in the High pressure yesterday, which appears to have been the highest for 20 years and perhaps the second highest in the region for about 50 years. Most unusual, and it feels nice and fresh. I love this kind of high pressure but the centre is slowly drifting into the continent now.

No air frost last night here though, only a ground frost and it's currently up to +8 deg C, sunny and quite pleasant for the time of year.
I got 1043 millibars here in Chelmsford. Exceptionally high pressure.

1041 now. Partly sunny 4.4C. Calm, or virtually so.
My barometer hit 1044.5mb in the early hours of Wednesday morning which really was notable, especially at this time of year. It's currently drifted back to 1038mbs this morning. Like you have said D@ve, I also noticed how very pleasant the general atmosphere was in the hour leading up to dusk last night, Wednesday, and commented on this to family on going outside.

Another heavy hoare frost here just like yesterday and when the sun rises shortly it is going to look magnificent, and a kind of white Christmas of sorts. Long may it continue. Perfect winter weather, and it remains not only crisp but extremely clear here with no sign of any fog or even mist despite it being widely forecast last night for this region.


-1 celcius was forecast for Bedford last night whereas in reality it went down to -4, tonight the BBC and Met office say 0 Celcius but it's obviously going to drop lower than that.
A calm wind, clear skies high pressure..
Making much the same error overnight/this morning too. Much colder than forecast or even being placed upon the met office site in real time even.
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Old 29-12-2016, 14:42
d'@ve
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-1 celcius was forecast for Bedford last night whereas in reality it went down to -4, tonight the BBC and Met office say 0 Celcius but it's obviously going to drop lower than that.
A calm wind, clear skies high pressure..


Making much the same error overnight/this morning too. Much colder than forecast or even being placed upon the met office site in real time even.
On the other hand, down here in suburban S Hants there has been no air frost for the last two nights in spite of clear skies - nothing more than an occasional very light ground frost. Minimum last night +3.3 C and clear sky. Max today 9.6C and sunny. Easterly wind but with a high dew point so I guess that was the clue but get this - Southampton Airport 7 miles away had -5 deg C, an astonishing difference!!! I have two additional 'check' thermometers in the garden, which all agreed to within a degree C.

So it looks like a town versus countryside thing, or a coastal boundary issue of the kind we don't usually see here, and the Met Office are never going to get that one right for everyone. Weird though, I have never seen such extreme differences in this small area.
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Old 29-12-2016, 15:13
swingaleg
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Very nice day in London today but it must have been very cold overnight as for the first time this winter there was some surface ice on the lake in Regent's Park when I was there at about 11 am
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Old 29-12-2016, 16:02
blueblade
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My barometer hit 1044.5mb in the early hours of Wednesday morning which really was notable, especially at this time of year. It's currently drifted back to 1038mbs this morning. Like you have said D@ve, I also noticed how very pleasant the general atmosphere was in the hour leading up to dusk last night, Wednesday, and commented on this to family on going outside.
1044.5 is incredible.

Here's a table of the extremes of high pressure over the UK:- source

Month Value Location Date

January 1053.6 hPa Aberdeen Observatory (Aberdeenshire) 31 January 1902

February 1052.9 hPa Aberdeen Observatory (Aberdeenshire) 1 February 1902

March 1047.9 hPa St Mary’s Airport (Isles of Scilly) 9 March 1953

April 1044.5 hPa Eskdalemuir (Dumfriesshire) 11 April 1938

May 1042.2 hPa Dublin Airport (Ireland) 16 May 1943

June 1043.1 hPa Clones (Co. Monaghan) 14 June 1959

July 1039.2 hPa Aboyne (Aberdeenshire) 16 July 1996

August 1037.4 hPa Kirkwall (Orkney) 25 August 1968

September 1042.0 hPa Ballykelly (Co. Londonderry) 11 September 2009

October 1045.6 hPa Dyce (Aberdeenshire) 31 October 1956

November 1046.7 hPa Aviemore (Inverness-shire) 10 November 1999

December 1051.9 hPa Wick (Caithness) 24 December 1926
Another heavy hoare frost here just like yesterday and when the sun rises shortly it is going to look magnificent, and a kind of white Christmas of sorts. Long may it continue. Perfect winter weather, and it remains not only crisp but extremely clear here with no sign of any fog or even mist despite it being widely forecast last night for this region.
Actually a gorgeous day today. The coldness is offset by the Sun and lack of wind. Even the cat was out for 3 hours this morning, which is most unusual in the Winter months.
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Old 29-12-2016, 17:18
Steffan_Leach
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It's been cold, clear, crisp and frosty here too. Like others have said, the BBC Weather for my town predicted 0c last night and -1c the night before, however according to the local weather observations for my nearest weather station a few miles away (which is at a higher altitude and at a more rural location btw), temperatures stayed above freezing all night...

http://www.metoffice.gov.uk/public/w...tion/gcwdjeczy


...But looking outside this morning, there must have been a definite air frost as it's lingered all day where the sun hasn't got to it.

Despite the weather app predicting fog and cloud for today, and a maximum temperature of just 3c it has actually been clear skies and sunshine so cold and clear is definitely better than cold, dull and foggy.

The next couple of days it's forecast to go back to being milder and cloudier, with a max of 8c forecast for Friday and Saturday. Some rain is also possible on Saturday. But hey, maybe it will be mild and sunny instead, like today only warmer!

After Saturday it's forecast to go back to being cold and crisp again.

Another odd thing that no one's picked up on is that BBC Weather is still saying the winds are in the South West/South South West yet with the current conditions you'd think it would be a northerly or an easterly. Strange..

As Dave has said, there is a great difference in temperature between locations because at my second nearest weather station, Linton-On-Ouse, north-east of Bingley Samos, temperatures never got above freezing, yet according to observations at Bingley, the mercury never went below!

http://www.metoffice.gov.uk/public/w...tion/gcx57w9fb
http://www.metoffice.gov.uk/public/w...tion/gcwdjeczy

From my own observations of looking out the bathroom window I have deduced that temperatures have increased throughout the day which had melted some of the frost away, whereas earlier temperatures must have definitely been at freezing or below due to the frost all over the grass, hedges, rooftops etc. Even the birdbath had frozen over.



It's looked like a winter wonderland out there today. I got some beautiful pics last night and this morning.:


https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...ew?usp=sharing
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https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...ew?usp=sharing
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https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...ew?usp=sharing
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https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...ew?usp=sharing
https://drive.google.com/file/d/0B56...> usp=sharing


Apologies for all the links...
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Old 29-12-2016, 18:05
blueblade
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^^^^^^^^^^^^

Some nice pics there !
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Old 30-12-2016, 09:37
albertd
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Very slippery underfoot about 7.30 this morning here in Crawley.
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Old 30-12-2016, 09:40
blueblade
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Some very wide temperature contrasts South to North this morning, but unlike most of the recent North South differences, this one sees the South with the lowest temperatures - widely al low as -2C over much of England and Wales, whereas over 10C over much of Scotland, Northern Ireland and the far North of Northern England. Kinloss at 13C (all 9am values)

link
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Old 30-12-2016, 10:30
mushymanrob
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well i got the prediction of mild wrong for today/yesterday....

i didnt foresee an inversion, the very mild uppers have just ridden over the top of the cold pool. the 850mb charts were right, and i used them, but they dont allow for this inversion... oh well, live and learn!

WINTERS COMING!

charts this morning, including the anomaly charts, point to a cold spell, although it might take a couple of swipes. the first sunday/monday, before less cold arrives as systems cross from the northwest. but high pressure to our west looks set to strengthen, for week 2 of january, this looks strongly like delivering a second, more potent, longer cold spell and SNOW for some.

a pool of very cold air looks set to cover northern/central europe , this needs watching as if the high to our west drifts across our northern latitude, it will get drawn our way.

so no mild on the horizon other then an odd day or two in the next week or so, from week 2 in january its looking cold, possibly bitterly cold with ice days and a growing snow risk.
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Old 30-12-2016, 12:06
blueblade
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well i got the prediction of mild wrong for today/yesterday....

i didnt foresee an inversion, the very mild uppers have just ridden over the top of the cold pool. the 850mb charts were right, and i used them, but they dont allow for this inversion... oh well, live and learn!

WINTERS COMING!

charts this morning, including the anomaly charts, point to a cold spell, although it might take a couple of swipes. the first sunday/monday, before less cold arrives as systems cross from the northwest. but high pressure to our west looks set to strengthen, for week 2 of january, this looks strongly like delivering a second, more potent, longer cold spell and SNOW for some.

a pool of very cold air looks set to cover northern/central europe , this needs watching as if the high to our west drifts across our northern latitude, it will get drawn our way.

so no mild on the horizon other then an odd day or two in the next week or so, from week 2 in january its looking cold, possibly bitterly cold with ice days and a growing snow risk.
Surface winds not strong enough to shift it.

...and yes, sadly, it does look very cold in the further outlook...
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Old 30-12-2016, 16:08
d'@ve
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WINTERS COMING!

charts this morning, including the anomaly charts, point to a cold spell, although it might take a couple of swipes. the first sunday/monday, before less cold arrives as systems cross from the northwest. but high pressure to our west looks set to strengthen, for week 2 of january, this looks strongly like delivering a second, more potent, longer cold spell and SNOW for some.

a pool of very cold air looks set to cover northern/central europe , this needs watching as if the high to our west drifts across our northern latitude, it will get drawn our way.

so no mild on the horizon other then an odd day or two in the next week or so, from week 2 in january its looking cold, possibly bitterly cold with ice days and a growing snow risk.
EDIT

Well the models were in broad agreement about the end of next week and so, it appears, were we! But it may already be changing or at least be uncertain now, as the 12 noon GFS backs right off on the cold at the end of next week, and the Canadian GEM has it as a transitory cold snap. So we await the ECMWF and GEM 12 noon runs...

As you rightly point out, the 850 mb temperatures definitely don't tell the whole story under Winter Highs. +3.0 C here right now under an inversion, which is lower than yesterday's minimum just outside the inversion whereas 6 miles away it was minus 5!
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Old 30-12-2016, 17:33
Steffan_Leach
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Meanwhile it's been a rather boring mild, cloudy day here. Dry as well. Frost had all melted by morning. 8c max according to BBC Weather app and 9/10c on the car dash.

I much prefer this kind of "neutral" "boring" weather to any kind of frost/cold though.

I've given up hoping for the white stuff now. For too many years throughout the Winter months I'd been frantically checking weather forecasts for snow and of course we eventually we get a small flurry before it melts away after a few hours and then that's it for another year.

I then foolishly got my hopes up whenever I saw or heard the word "snow" mentioned on the radio or media, or by word of mouth. Just look at all my threads last year on the topic - "coldest winter in 50 years". My arse!

Tbh I'd be quite happy this year if we had 8-13c temperature range every day over the next couple of months.
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Old 30-12-2016, 19:51
Marksw76
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A question for you weather experts...

Am I right in thinking HIGH pressure in the summer is hot and settled, and in the winter it's clear skies and cold/freezing nights?

If this is correct, then why do we always seem to have prolonged spells of cold freezing weather in January but very rarely do we get prolonged high pressure hanging around in the Summer bringing us weeks of hot sunshine?
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Old 30-12-2016, 20:31
d'@ve
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A question for you weather experts...

Am I right in thinking HIGH pressure in the summer is hot and settled, and in the winter it's clear skies and cold/freezing nights?
Usually, yes but there exceptions as sometimes they are cloudy Highs.

If this is correct, then why do we always seem to have prolonged spells of cold freezing weather in January but very rarely do we get prolonged high pressure hanging around in the Summer bringing us weeks of hot sunshine?
Because we don't often have prolonged spells of cold freezing weather in January, especially the further south you go in the UK. In recent years they have been fairly uncommon, but when they do occur, we tend to remember them and forget the far more common average, cloudy, mild or rainy muck that we usually get.
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Old 30-12-2016, 21:03
Steffan_Leach
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A question for you weather experts...

Am I right in thinking HIGH pressure in the summer is hot and settled, and in the winter it's clear skies and cold/freezing nights?

If this is correct, then why do we always seem to have prolonged spells of cold freezing weather in January but very rarely do we get prolonged high pressure hanging around in the Summer bringing us weeks of hot sunshine?
Short answer: Because we live in the UK and that's the way it is.


Long answer: Generally speaking that is correct. High Pressure and an easterly wind usually bring cold, dry and crisp weather in Winter and warm, dry and sunny weather in Summer.

With low pressure and a westerly wind the opposite scenario usually occurs - mild, wet and cloudy weather in Winter and cool, wet and cloudy weather in Summer.

The reason why we seem to get a lot more colder weather is probably down to our perception of the weather. In January and February in many places the average low temperature is around 1-4°C, so pretty cold, enough to give a light ground/car frost and of course as that's just the average there will be a lot of nights when it's colder than that. In Winter the average high temperatures range from about 6-9°C in most places which may seem mild to some but add in rain and wind etc and it will feel cold for many.

Also, there doesn't have to be high pressure in Winter for it to feel cold. Strong winds, rain, high humidity and an absense of sunshine will often make it feel colder. A strong northerly or north-westerly wind and polar maritime or arctic air, which typically brings cold weather with low pressure, rain and strong winds, can feel pretty chilly actually.

Speaking of which, Polar Maritime air is actually the most common air mass, which typically brings cold, rainy and showery weather in Winter and also (you guessed it) typically brings cold, rainy and showery weather in Summer, with the only difference being that temperatures will be higher in Summer.

Under this air mass, temperatures will typically be around 4-8°C during the Winter and around 13-19°C during the day in Summer.

We also get a lot of Tropical Maritime air which typically brings mild, wet and cloudy weather in Winter and warm, wet, humid, muggy and cloudy weather in Summer. Under this air mass, temperatures will typically be around 8-13°C during Winter and about 15-24°C during the day in Summer.

The air mass which typically gives us very hot dry weather in Summer is called the Tropical Continental Air Mass and gives us that hot, dry, sticky and sunny weather many of us love (and hate!) in Summer. It originates from North Africa but it doesn't call very often and when it does it doesn't usually last long. Our highest temperatures usually occur under the influence of this air mass (over 30 °C by day and around 15 to 20 °C at night).

The Polar Continental air mass (which originates from Central Europe) typically gives us cold (but not necessary dry!) weather in Winter, as usually it gives us that cold, crisp and frosty weather I talked about earlier but occasionally it can give snow as well! Especially if the air is coming from a very cold place such as Siberia... It typically gives pleasant warm sunny weather in Summer but usually nothing extremely hot unlike the Tropical Continental air.

You can read more about air masses here: http://www.metoffice.gov.uk/learning...r-masses/types

In the Summer average high temperatures generally range from about 18-22°C in most places in the UK (excluding Northern Scotland) which isn't particularly hot, just average room temperature really (though it can feel very warm if there is unbroken sunshine or high humidity or you are wearing thick clothing etc).

Also, a hot, dry spell in Summer in the UK is often soon interrupted by thunderstorms as the higher temperatures cause friction and unsettled weather in the atmosphere lowering the pressure, typically giving short, sharp showers and heavy rain.

Whereas there is nothing really to interrupt a cold spell in Winter except perhaps a mild south westerly blast from the Atlantic.


Hope I answered your question.
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Old 31-12-2016, 05:24
Rich Tea.
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1044.5 is incredible.

Here's a table of the extremes of high pressure over the UK:- source
Really enjoyed looking through that Met Office link on extremes Blueblade.

Nice pics and maybe next time you can do a selfie in front of one of them. I like to see who I'm chatting to if possible. Seems like a very nice area.
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Old 31-12-2016, 08:29
mushymanrob
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EDIT

Well the models were in broad agreement about the end of next week and so, it appears, were we! But it may already be changing or at least be uncertain now, as the 12 noon GFS backs right off on the cold at the end of next week, and the Canadian GEM has it as a transitory cold snap. So we await the ECMWF and GEM 12 noon runs...

As you rightly point out, the 850 mb temperatures definitely don't tell the whole story under Winter Highs. +3.0 C here right now under an inversion, which is lower than yesterday's minimum just outside the inversion whereas 6 miles away it was minus 5!
well i definitely got the mild wrong, due to the inversion...

thats the trouble with the ops, and why i stick to the anomaly charts for this time range. the ops for detail for current/near current, but the anoms do pick the general trend up accurately - its just interpreting what we might get is where people like me can trip up.

the 8-14 day chart strongly suggests a lot of cold northerly weather for that timeframe... high building to our north, we get northerlies/northeasterlies. but this prediction needs further runs to firm up. so its not certain just yet.
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Old 31-12-2016, 12:05
Steffan_Leach
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Plenty of boring cloudy weather around the country today. Checked several locations around the country and it's basically the same - thick cloud, grey, dull, light rain or sunny spells possible and temps around 8 or 9c.

Can you get a weather day any more boring and dreary than this...? - it's gonna be a constant 8c and thick cloud all day for Southampton according to the BBC - http://www.bbc.co.uk/weather/2637487

For many other places it's the same as well..
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