December 2024 was a very wet and a rather mild month in StrathpefferStrathpeffer Strathpeffer (Scottish Gaelic: Srath Pheofhair) is a village and spa town in Easter Ross, Highland, Scotland, with a population of 1,469. with almost 9 inches of rain.
Strathpeffer – December 2024 Read More »
December 2024 was a rather anticyclonic affair, and zonal in nature. There were some cyclonic interruptions though, notably on the 6th and 7th with Storm Darragh, but after that pressure rose quickly with an intense high forming close to northern Scotland from the 9th to the 13th. A couple of other deep depressions tracked eastward close to the north of Scotland on the 18th and 22nd, producing gales and storm force gusts, but the UKMOUKMO The Meteorological Office is the United Kingdom's national weather service. It is an executive agency and trading fund of the Department for Business, Energy and Industrial Strategy deemed neither were worthy of being a named storm. I produced this data from six hourly reanalysis data rather than just the daily data from the CRU at the UEA, I wonder if anyone will even notice?
December 2024 – Circulation Read More »
A bridge between two large positive temperature anomalies, one in the west of in Hudson Bay (+11°C), the other in the east in the Kara Sea (+7°C), spanned the North Atlantic in December. Either side was generally cooler, Southern Greenland was anomalously cold (-5°C), as was much of the southern North Atlantic, Mediterranean and near East. Anomalies across IONAIONA Islands Of North Atlantic. Yes I know there's an island called Iona, but this is so I don't have to use the term 'British Isles' when referring to the whole of Ireland and the UK. in the bridge were a toasty +1.6°C above the LTALTA Long Term Average. This is usually defined as a 30 year period by the WMO..
December 2024 – Temperature Anomalies Read More »
December was a very mild month across the UKUK The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland., the fifth warmest in the UK to be exact since 1884, with a mean temperature of 6.2°C, that was +2.0°C above the 1991-2020 LTALTA Long Term Average. This is usually defined as a 30 year period by the WMO.. Rainfall totals were closer to average though, at 110% of the POAPOA Percentage Of Average, the wetter weather in the north balancing out the drier weather across the south. It was a very dull month across the board, sunshine totals were the fourth lowest since 1910, at just 57% of the POA.
Weather Summary – December 2024 Read More »
December 2024 ended up with a mean of 6.8°C, that’s 1.9°C above the 1991-2020 LTALTA Long Term Average. This is usually defined as a 30 year period by the WMO., making it the joint 12th mildest since 1659.
Some places in England remained frost free.
December 2024 – CET Read More »
Using the objective LWTLWT Lamb Weather Types are often used in UK-based analyses, with individual weather patterns based on the eight primary cardinal directions (N, NE, E, SE, S, SW, W, NW) plus cyclonic (C), anticyclonic (A) and unclassified (U) types. as a guide, the most anticyclonic December since 1871 across the British Isles occurred as recently as 1991.
Despite being so anticyclonic, 1991 only managed #41 driest December in the UKUK The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. since 1836, with a total of 83 mm of precipitation (65% of average). A much drier December occurred more recently in the cold December of 2010, when just 47 mm fell (37% of the 1991-2020 long-term average).
The most anticyclonic December Read More »
6 Dec 2024 12 UTCUTC Coordinated Universal Time or UTC is the primary time standard by which the world regulates clocks and time. It is within about 1 second of mean solar time (such as UT1) at 0° longitude (at the IERS Reference Meridian as the currently used prime meridian) and is not adjusted for daylight saving time. It is effectively a successor to Greenwich Mean Time (GMT). Surface analysis MSLPMSLP Mean sea level pressure is the pressure at sea level, or, when measured at a given elevation on land, the station pressure reduced to sea level assuming an isothermal layer at the station temperature. falling 10.4 hPahPa A Hectopascal is the SI unit of pressure and identical to the Millibar in the last 3 hrs at Belmullet (1), with dewpoints of 11°C coming into Valentia (2).
6 Dec 2024 13 UTC 3 hr Pressure Tendencies The central pressure of Storm Darragh may not be explosive cyclogenetic, but 3 hr pressure falls of 12 hPa across W Ireland at present are not to be sniffed at. 🤨 The Belmullet barograph is showing a roller coaster ride 😉
6 Dec 2024 15 UTC Surface analysis Dewpoints of 13°C into SW Ireland. Cold front getting close to Valentia Big pressure fall across Ireland of 10 hPa or more over 3 hrs. Weather buoy K2 goes offline – can you beleive it! No double structures here!!
6 Dec 2024 18 UTC 3 hr pressure changes
6 Dec 2024 21 UTC Surface analysis Big pressure rises at Valentia (1) First signs of very strong northerly to the W of Ireland Sleet at Aboyne (2)
7 Dec 2024 08 UTC Highest overnight gusts It looks like Capel Curig, aka as the Snowdonia wind tunnel, has recorded the highest gust of 81 kts or 93 mph overnight.
7 Dec 2024 09 UTC Total Precipitation [33 hrs] Estimates from weather radar A wet night in many places away from the far SE, with areas of 40-50 mm over high ground of Argyll & Bute, N Ireland, Lake district & Snowdonia,with white pixels indicating >80 mm in wettest places.
7 Dec 2024 09 UTC A selection of anemographs Notice the high gust-mean ratio at Capel Curig. The rapid increase of speed at Crosby at 06 UTC. Inland gale at Yeovilton.
7 Dec 2024 03-14 UTC Total Precipitation [11 hrs] Estimates from weather radar. The heaviest of the rain in Wales seems to have been further W than the AMBER warning area so far, with >80 mm over Snowdonia.
7 Dec 2024 16 UTC Aberporth Still blowing a force 10 NW’ly with gusts of 85 mph. Gale force 8 for 24 straight hours. 😱 That’s where the BBCBBC The British Broadcasting Corporation (BBC) is the national broadcaster of the United Kingdom, based at Broadcasting House in London. It is the world's oldest national broadcaster, and the largest broadcaster in the world by number of employees, employing over 22,000 staff in total, of whom approximately 19,000 are in public-sector broadcasting. & ITV should have sent their film crews today 😉
7 Dec 2024 19 UTC Max Gusts [mph] You can hear the wind moaning in the bell tower at Notre-Dame… The bells, the bells…
7 Dec 2024 19 UTC 24 hr MSLP difference The pressure is close to 47 hPa higher at Belmullet than it was last night.
Was there a gust of 96 mph or not at Berry head? The original tweet from the UKMOUKMO The Meteorological Office is the United Kingdom's national weather service. It is an executive agency and trading fund of the Department for Business, Energy and Industrial Strategy has just vanished.
Snow on CairngormCairn Gorm Cairn Gorm (Scottish Gaelic: An Càrn Gorm) is a mountain in the Scottish Highlands. It is part of the Cairngorms range and wider Grampian Mountains. With a summit elevation of 1,245 m (4,085 ft) above sea level, Cairn Gorm is classed as a Munro and is the seventh-highest mountain in the British Isles..
Storm Darragh – 6/7 December 2024 Read More »
Added a bit more logic to the Extremes viewer in my Reanalysis MSLPMSLP Mean sea level pressure is the pressure at sea level, or, when measured at a given elevation on land, the station pressure reduced to sea level assuming an isothermal layer at the station temperature. application to distinguish if the centre of the vortices it found, be it high or low, was on the edge of the chart. Here are the results from all Decembers back to 1948.
December – Highest and Lowest MSLP since 1948 Read More »
December 2023 became the seventh consecutive month to set a new highest monthly record. Again it did it by another large margin in my DIYDIY Do It Yourself Global temperature series. The December mean 0f 0.53°C was 0.16°C higher than the previous warmest December in 2015. The question I wonder about is what happens to the meteoric rise when it comes full circle this June?
Currently the latest daily global mean I’ve calculated for the 31st of December is still out on it’s own in record breaking territory.
Global Temperatures | December 2023 | 7th Consecutive Warmest Read More »
With large parts of the world anomalously warm, the cold belt stretching from Greenland, across Scandinavia and on eastward into Siberia and China persisted. In the UKUK The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. this cold belt to the north enhanced the N-S thermal gradient, thanks in no small part to a warm tongue of positive anomalies extending NW from the Balkans, no doubt the result of the many warm sectors that affected southern areas of the UK during the month. Temperature anomalies of 9°C above the LTALTA Long Term Average. This is usually defined as a 30 year period by the WMO. across North America were nothing short of extraordinary.
Global Temperatures – December 2023 Read More »
December 2023 ended up being a mobile month with the jet stream for much of it south shifted, which made it more cyclonic than normal, and hence a rather windy month too with four named storms. The LWTLWT Lamb Weather Types are often used in UK-based analyses, with individual weather patterns based on the eight primary cardinal directions (N, NE, E, SE, S, SW, W, NW) plus cyclonic (C), anticyclonic (A) and unclassified (U) types. zonal index was negative for the first week or more, but went positive in a big way from the second week onward. Quite a few classic analyses from the UKMOUKMO The Meteorological Office is the United Kingdom's national weather service. It is an executive agency and trading fund of the Department for Business, Energy and Industrial Strategy during the month ranging from a plethora (thanks CK) of troughs on the 1st & 2nd to multiple occlusions on the 31st (thanks Mr Occlusion).
Circulation – December 2023 Read More »
The north of Scotland was the driest, sunniest, coldest and frostiest region in the UKUK The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. in December 2023. It’s a shame the UKMOUKMO The Meteorological Office is the United Kingdom's national weather service. It is an executive agency and trading fund of the Department for Business, Energy and Industrial Strategy don’t provide a chart showing mean wind speeds which this month would show that it’s also been pretty windy too. The +0.1°C mean temperature for northern Scotland has been
December 2023 – Weather Summary Read More »
The December 2023 cold spell Read More »
Dear Diary
We are more or less halfway through December 2022 now, and the latest mean temperatures for the UKUK The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. (-3.49°C estimated) indicate that currently 2022 is the coldest since 2010 (the coldest December on record), and the fourth coldest since 1884 behind 2010, 1981 and 1890. Of course there is the matter of the second half of the month to come, and these low values are bound to take a big knock early next week as very mild air is set to make a temporary return.
Coldest December since 2010 and fourth coldest since 1884 Read More »
Click to enlarge
Looking back to December 2010 Read More »
Dear Diary
I thought I’d take a look back at how the start of this December (2022) compares with that of 2010, the coldest December in the UKUK The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. in the gridded data series that extends back to 1884. I’m afraid it’s no contest so far, at least in the first eleven days of the month. It’s funny living in Devon as we did in 2010, it didn’t feel at all like it was going to end up the coldest December on record. We certainly had a couple of falls of snow, but the snow wasn’t as powdery, or drift as it did in the intense cold wave of January 1987. I’m beginning to sound like that episode of Vicar of Dibley now so I’ll stop.
December 2010 v 2022 Read More »
