Pinned Tweet
One to replace the previous pinned post - there’s a whole load of weather on this page so feel free to stick around if you want to with a sprinkle of aurora whenever that peps up. I hope this picture of me and a goose from this morning is suitable for now!
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A scan of the MIDAS archive suggests that Heathrow's 10-metre visibility reading at 23 UTC last night is the lowest since automatic sensors took hold and the lowest literal reading of 10 m since Dec 1962; 15th Dec 1991 had <50 m visibility. QC'ing these is a bit of a nightmare!
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MetJam retweeted
Never been in fog this thick in my entire life, working until midnight at Heathrow, but had to abandon driving home to Caterham, as it felt dangerous even just driving down the quiet drive to main road, this was walking to the hotel we booked next to our offices, my colleague og asking ‘are you still there?’ 😆
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More than 30 vehicles have been involved in a crash on the M20 tonight; fog has been incredibly thick along some roads here in Kent this evening. One road was shut near Monkton in East Kent due to extremely poor visibility (barely to the car in front, probably <20 metres).
Two people have been seriously injured in a major motorway collision involving more than 30 vehicles on the M20 in Kent, forcing police to close both carriageways overnight
Updates at uknip.co.uk/news/uk/uk-new… @uknip247
@SussexTW
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Just an idea of the visibility from the same road (from Birchington-on-Sea Facebook group):
facebook.com/photo.php?fbid…
facebook.com/photo.php?fbid…
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Stubborn cloud in play, visible on Herstmonceux's midnight sounding. A well-mixed boundary layer extends up to the cloud base, which starts around 750 metres up and stretches up to around 2 kilometres. The inversion acts as a lid, helping to prevent moist air from mixing out.
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MetJam retweeted
An impressive wedge tornado struck the airport and an aircraft in the city of Chapecó, Santa Catarina, Brazil, earlier today. Radar imagery captured by the Previsão Masters app (previsaomasters.com).
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MetJam retweeted
🟦 CLEAN FEED | The post-Newsnight weather bulletin has now been discontinued, as part of the BBC cuts.
Chris Fawkes presented the final bulletin last Friday evening at 7.30pm on BBC Two.
Chris Fawkes presented the final bulletin last Friday evening at 7.30pm on BBC Two.
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MetJam retweeted
Largely clear skies across England & Wales gave a unique chance to study the temperature response to the 12th Aug 2026 solar eclipse — a rare evening eclipse ☀️🌗🌍
Screen temp reached a mean anomaly of –1.8°C ~16 mins after max eclipse 📉
@RMetS paper: rmets.onlinelibrary.wiley.com/share/ZRIMWC6Z…
Screen temp reached a mean anomaly of –1.8°C ~16 mins after max eclipse 📉
@RMetS paper: rmets.onlinelibrary.wiley.com/share/ZRIMWC6Z…
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I feel like we are in pretty dire times when we are assessing the atmospheric transport of any contaminants from a nuclear weapon being potentially deployed 😵💫
🌍 ☢️ Multi-Layer Wind Anomaly Analysis | 5–15 November .
ترجمة للعربية بأول تعليق . توقعات شدة و اتجاهات الرياح و الملوثات في حال ضربة نووية لايران .
With the possibility of nuclear weapon use over Iran remaining uncertain, I wanted to examine how the atmospheric circulation ght influence the potential transport of dust and other airborne contaminants should such an event occur.
I have attached zonal wind (U) anomalies from the surface to 700 hPa, with the corresponding meridional wind (V) anomalies for the same atmospheric layers in the comments. The Zonal winds depict west-east wind and meridional wind anomalies depict the North-South winds.
The objective is to examine the full atmospheric column and compare the prevailing wind patterns with historical analogs, rather than relying on surface wind direction alone.
Key regional areas of concern:
🔴 Pakistan and Afghanistan & India – Primary downstream areas of interest
Their eastern and northeastern position relative to Iran makes them important areas to monitor, particularly in relation to the 850–700 hPa wind patterns and possible eastward or northeastward transport.
🟠 Oman and southern Gulf states ( UAE and Saudi Arabia SE) – Conditional low-level transport
The 925–850 hPa meridional wind patterns could help identify potential transport towards the Gulf of Oman and surrounding coastal areas.
🟡 Western and northern India – Possible longer-range transport.
The upper-level circulation, particularly around 300 hPa, deserves attention when assessing the possibility of longer-range transport, depending on plume altitude and vertical atmospheric mixing.
Why use Analog Ensemble methods?
Historical analogs can help identify previous atmospheric situations with comparable multi-level wind patterns and assess the range of possible circulation developments.
I am particularly interested in examining wind direction, speed, vertical differences and the consistency of these patterns across atmospheric layers.
These are potential meteorological transport pathways, not predictions of nuclear weapon use, Actual contamination or actual exposure, they should be used as qualitative probabilistic views of how aerosol may transport and how far incase of nuclear weapon was employed. Any real assessment would require dedicated atmospheric dispersion modelling and radiation monitoring.
#Meteorology #AtmosphericDynamics #AnalogEnsemble #Reanalysis #SynopticScale #DataAnalysis #PyreWeather
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MetJam retweeted
November
Plenty high pressure, more unsettled late on
High pressure to 9th, maybe something a touch unsettled 10-13th before more high pressure, particularly in the South
More widely unsettled possible late on, small chance of colder air, especially in North
#UKweather #LakeDistrict
Plenty high pressure, more unsettled late on
High pressure to 9th, maybe something a touch unsettled 10-13th before more high pressure, particularly in the South
More widely unsettled possible late on, small chance of colder air, especially in North
#UKweather #LakeDistrict
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