Dan Holley @danholley.bsky.social · 14hIt was an exceptionally warm night across the UK for late September, with some stations recording 22°C during the early hours. The temperature has been rising all through the night at Edinburgh, for example. Red box highlights just how much last night stands out from individual site records. 0209
Dan Holley @danholley.bsky.social · 13/08/2026The Partial Solar Eclipse of 12th August 2026 over east Devon – maximum obscuration around 94% ☀️🌗🌍 119122
Dan Holley @danholley.bsky.social · 10/08/2026A short video, panning from SW to NE, of totality from the 8th April 2024 Total Solar Eclipse, taken at ~2pm local time in rural Illinois. Such a surreal experience, especially the shadow bands immediately before totality. 180
Dan Holley @danholley.bsky.social · 04/08/2026Experimenting with ways to convey extremeness of a month/season as a combination of temperature, rainfall and sunshine. Eventually settled on these "Climate Segments", which really highlight how exceptional July 2026 was in England/Wales. More details in the Deep Dive: youtube.com/watch?v=m-om... 080
Dan Holley @danholley.bsky.social · 25/07/2026On this day 5 years ago, thunderstorms caused significant flooding in parts of East Anglia, London and SE England. Brettenham (Suffolk) received ~180 mm of rain in less than 2 hours – one of the most intense short-duration rain events recorded in the UK. www.youtube.com/watch?v=PNP0...youtube.comThe Brettenham storm of 25 July 2021YouTube video by WeatherQuest Ltd 1124
Dan Holley @danholley.bsky.social · 02/07/2026Today the @metoffice.gov.uk issued its forecast for 2056, featuring the possibility of temperatures reaching 45°C in the UK. By chance, member #24 of today's 12Z GEFS ensemble is predicting 45°C in almost exactly the same location on 13th July 2026 – 30 years too early? @aidanmcgivern.bsky.social 7417
Dan Holley @danholley.bsky.social · 29/06/2026Here's a look at numerous individual weather stations across a swathe of England + Wales, comparing the maximum temperature recorded during June 2026 with the whole of summer 1976 – in some cases temperatures were over 4°C hotter in the recent heatwave 🌡️ bsky.app/profile/meto... 0145
Dan Holley @danholley.bsky.social · 27/06/2026The exceptional June 2026 #heatwave: - 130 wx stations (13 with data spanning ≥100 years) set new June TMax records - 124 (10 spanning ≥100 years) set new June TMin records - 26 set all-time TMax records, largely focussed in coastal counties - 65 sites set all-time TMin records 1299
Dan Holley @danholley.bsky.social · 06/06/2026Near-stationary supercell thunderstorm over Swanton NE on Friday evening 🌩️ 1172
Dan Holley @danholley.bsky.social · 01/06/2026Thunderstorms in eastern Kansas on Sunday night were prolific lightning producers 🌩️ 0111
Dan Holley @danholley.bsky.social · 01/06/2026A glimpse of the brief nocturnal #tornado from a supercell thunderstorm near #Madison KS, lit by CG lightning, around 21:40 CDT on Sunday evening 🌩️ 171
Dan Holley @danholley.bsky.social · 27/05/2026New paper looking at very large hail (up to 5 cm in diameter) in E'ern Scotland in Aug 2025. A cell merger event, coupled with complex topography, may have been partly responsible for the enhanced hail size in an otherwise weak wind shear environment. rmets.onlinelibrary.wiley.com/doi/10.1002/...rmets.onlinelibrary.wiley.comSevere thunderstorms over eastern Scotland, 14 August 2025 – a case of very large hail in a synoptically weak vertical wind shear environmentSevere thunderstorms occurred over eastern Scotland on 14 August 2025, leading to impacts from flash flooding, lightning strikes and notable damage from hail up to 5cm in diameter. Hail of this size .... 150
Dan Holley @danholley.bsky.social · 25/05/2026Kenley was an ideal candidate to break the May daily minimum temperature record due to its elevation – at 170 m it sits above the temperature inversion, whilst many of its neighbouring sites below the inversion recorded lower temperatures overnight bsky.app/profile/meto... 5132
Dan Holley @danholley.bsky.social · 11/05/2026Another pulse of unusually cold air for the time of year spreading south across the UK yesterday into today 🥶 00Z radiosonde ascent at Lerwick measured a 1000-850 hPa thickness of 128.6 dam (❌), sitting in the bottom 2% of the 31-day centred record. Already 6 air frosts at Kinbrace — May avg 4.6 040
Reposted by Dan HolleyMet Office - weather and climate @metoffice.gov.uk · 31/03/2026The Easter weekend is looking very unsettled, especially towards the northwest with a series of low pressure systems set to push through 🌧️ Find out more in our latest Deep Dive with Alex Burkill 👇open.spotify.comDeep Dive 31/03/2026 –Low after low – Met Office weekly weather forecast UKSpotify video 191
Dan Holley @danholley.bsky.social · 02/04/2026#ArtemisII launch captured on mid-level water vapour imagery from the GOES-East satellite 🚀🛰️ Credit: College of DuPage 131
Reposted by Dan HolleyMet Office - weather and climate @metoffice.gov.uk · 05/02/2026Wondering where the sunshine has gone? Spare a thought for northeast Scotland; Aberdeen Dyce hasn't recorded any sunshine since 21 January! This is provisionally the longest sunless period here since records began in 1957 ☁️ 911146
Dan Holley @danholley.bsky.social · 05/02/2026Dyce (Aberdeen) has now recorded no sunshine for the past 14 days – its longest spell on record (since 1957) ☁️ The daily frequency (persistence) of SE'ly weather types in the objective Lamb Weather Types dataset (since 1871) was the joint 2nd highest on record for the month of January... 010
Reposted by Dan HolleyMetJam @metjam.co.uk · 04/02/2026Information is from Stephen Burt: Reading has seen 24 consecutive days of rainfall, the longest unbroken spell of consecutive rainfall days at Reading since daily rainfall records began in 1908, beating the 23 days set in December 1934 and in January 1970. It has been very wet. 281
Dan Holley @danholley.bsky.social · 25/12/2025Merry Christmas all, on the highest pressure over the UK on Christmas Day since 1991 📈 The Scottish mountains have been poking above the subsidence inversion, where Cairngorm recorded a dewpoint of -41°C yesterday afternoon, with a corresponding relative humidity of 2%! 🏔️ 2182
Dan Holley @danholley.bsky.social · 21/09/2025Across a swathe of Wales and N'ern England, Sat 20th Sept was the wettest climatological day (09Z - 09Z) since at least New Year's Eve 2024. Loftus (N Yorks) recorded its wettest day, for any month, since Aug 2002; Trawsgoed (Ceredigion) wettest day since Oct 2018. Data @roostweather.bsky.social 192
Dan Holley @danholley.bsky.social · 14/08/2025Very energetic thunderstorms in eastern Scotland this afternoon, producing hail ≥3 cm in diameter and torrential rain — some unofficial gauges recorded as much as 50 mm in 15-25 minutes. The temperature at Aboyne fell by 11°C over a 24 minute period ⛈️ 0134
Dan Holley @danholley.bsky.social · 04/08/2025Storm #Floris, an exceptional summer storm 🌀 Provisionally: - Strongest August gust on record in Scotland - Equal strongest August gust on record in Northern Ireland - Lowest August mean sea level pressure in NW Scotland and Orkney since 1992 - Central pressure ⬇️ 28 hPa in 24 hours 35924
Reposted by Dan HolleySimon Lee @simonleewx.com · 04/08/202506Z surface analysis from @metoffice.gov.uk showing Storm Floris at 983 hPa just west of Scotland. The frontal analysis follows the Shapiro-Keyser cyclone model, with a frontal fracture (cold front detached from the warm front). S-K cyclones are typically among the most intense & rare in summer. 3267
Reposted by Dan HolleyDan Harris @roostweather.bsky.social · 20/07/2025A beaut of an MCV (Mesoscale Convective Vortex) - h/t @danholley.bsky.social 1309
Dan Holley @danholley.bsky.social · 30/06/2025Decent noctilucent cloud display from Devon (50.7°N) late Sunday evening ✨ 1111
Dan Holley @danholley.bsky.social · 25/06/2025Popped in to the @metoffice.gov.uk Deep Dive studio yesterday to chat about supercell thunderstorms 🌩️ youtu.be/AR6Egr5UzOcyoutu.beDeep Dive 24/06/2025 – Was there a supercell at the weekend? – Met Office weekly weather forecast UKYouTube video by Met Office - UK Weather 350
Dan Holley @danholley.bsky.social · 08/06/2025Lightning under moonlight, west of Channing TX on Saturday evening ⚡🌚 3565
Dan Holley @danholley.bsky.social · 08/06/2025Incredible supercell structure near Amistad NM on Saturday evening 🌩️ 610119
Dan Holley @danholley.bsky.social · 07/06/2025Lightning over Spearman TX on Friday evening, shortly after a tornadic supercell thunderstorm moved through town 271
Dan Holley @danholley.bsky.social · 06/06/2025Genuinely lost count how many tornadoes were produced by this supercell thunderstorm that trundled ESE'wards from near Dora NM to Lubbock TX on Thursday afternoon/evening 🌪️ 3526
Dan Holley @danholley.bsky.social · 01/04/2025March 2025 was noteworthy for abundant sunshine and lack of rain — provisionally, it was the sunniest March on record in England, sunnier than July or August last year or the year before! ☀️ Wales (provisionally) had its driest March since 1944 & lowest number of March rain days (1 mm) since 1929. 🏜️ 2173
Dan Holley @danholley.bsky.social · 29/03/2025Despite the pesky cloud at times, a decent nibble and cheeky sunspot visible from Devon during this morning's Partial Solar #Eclipse 🌞🌚 0222
Dan Holley @danholley.bsky.social · 19/03/2025Guest appearance on this week’s @metoffice.bsky.social Deep Dive with @alexdeakin.bsky.social, discussing the recent dust storms, wildfires and tornadoes in the U.S. youtu.be/XwtSmKim23w?...youtu.beDeep Dive 18/03/2025 – Storms and tornadoes in the USA – Met Office weekly weather forecast UKYouTube video by Met Office - UK Weather 040
Dan Holley @danholley.bsky.social · 15/03/2025An incredible satellite sequence from GOES-East over the US Plains on Friday evening. Severe thunderstorms erupting along the cold front, intense winds (60-80 mph) to its rear suspending vast quantities of dust (area covered is larger than the UK), and a significant number of wildfires (black spots) 63911
Dan Holley @danholley.bsky.social · 07/03/2025Recent anticyclonic conditions has allowed many parts of England and Wales their sunniest start to March on record. Wattisham has already received ~50% of its monthly average sunshine in just 6 days. In stark contrast, Tiree has recorded its dullest start to March on record (data back to 1931). 060
Dan Holley @danholley.bsky.social · 24/02/2025105mm of rain fell at Nant Yr Ysfa (Rhondda Cynon Taf), 103mm at White Barrow (Devon), 06Z Sunday to 06Z Monday. Met Office warnings mentioned 80-100mm exposed hills in S. Wales, and 70-100mm Dartmoor. Accum rates similar to Storm Bert, but Bert lasted ~43 hours. Map: @roostweather.bsky.social 0145
Reposted by Dan HolleySarah H @sarahhants.bsky.social · 26/01/2025For those wondering about the Halloween 2021 mesolow, a paper authored by @danholley.bsky.social and many members of @torrouk.bsky.social can be found in Weather rmets.onlinelibrary.wiley.com/doi/epdf/10.... However, at present we don't yet know how tonight will evolve. All eyes on the south coast.rmets.onlinelibrary.wiley.comHalloween windstorm and tornadoes in England, 31 October 2021 172
Reposted by Dan HolleyMetJam @metjam.co.uk · 26/01/2025Tonight's development of a mesolow looks to take a broadly similar path to one seen on 31st October 2021 (h/t @danholley.bsky.social to the similarity on that one). The corridor of strong winds from these only tends to be ~20-30 km wide but does pack a punch, perhaps caused by a small stingjet. 2112
Reposted by Dan HolleyMet Office - weather and climate @metoffice.gov.uk · 22/01/2025⚠️⚠️ Amber weather warning issued ⚠️⚠️ Strong winds due to #StormÉowyn across Northern Ireland, northern England, north Wales and central and southern Scotland Friday 0600 – 2100 Latest info 👉 bit.ly/WxWarning Stay #WeatherAware ⚠️ 817665
Reposted by Dan HolleySimon Lee @simonleewx.com · 09/01/2025"The weather regime that on average brings the coldest weather is warming the fastest in a large part of northern Europe." It might be cold at the moment, but in the past, the same weather pattern would likely have been a lot colder. doi.org/10.1002/asl.... @mikarantane.bsky.socialdoi.orgAsymmetric warming rates between warm and cold weather regimes in EuropeIn most of Europe, the weather regime which is associated with cold airmasses from the Arctic (NAO–) is warming faster than the weather regime where the air flows from the North Atlantic (NAO+), resu... 06123
Reposted by Dan HolleySimon Lee @simonleewx.com · 07/01/2025The January issue of Weather is now online! @rmets.org Featuring: – The January 2024 UK max temperature record – The Jersey hailstorm during Storm Ciarán – The Fennoscandian cold blob in winter 2023/24 – Citizen science for cloud validation + more! rmets.onlinelibrary.wiley.com/toc/14778696... 2207
Dan Holley @danholley.bsky.social · 06/01/2025Some places experienced freezing rain on Sunday — especially Wales and the Midlands, as confirmed by these BBC Weather Watchers photos. The deepest official snow depth reported was 24 cm at Copley (Co Durham) at 9am on Monday morning — but parts of the northern Pennines likely saw more than this. 1176
Dan Holley @danholley.bsky.social · 31/12/2024A look back at a few weather snaps 📸 from 2024 — the highlight of the year has to be the total solar #eclipse in April, but closely followed by the most amazing #aurora display in May (made even more special by being visible, by eye 👀, at 52.5°N)... What does 2025 have in store? 🤔 070
Dan Holley @danholley.bsky.social · 09/12/2024Here's a look at all named storms that have impacted the UK since official naming began in 2015, including some named by other forecasting centres, coloured by the highest warning level issued. The storm season runs each year from September through to the end of August the following year. 43514