Michael Sleigh's Avatar

Michael Sleigh

@msleigh.io

Head of Integrated Forecast Systems at ECMWF. Ex-physicist (previously Group Leader for Computational Physics at AWE). Interested in HPC, software, scientific computing, classical guitar, music

853
Followers
1,588
Following
99
Posts
16.02.2024
Joined
Posts Following

Latest posts by Michael Sleigh @msleigh.io

Three performers on a blue-lit stage with heavy fog, corrugated metal backdrop panels, and downward-pointing spotlights.

Three performers on a blue-lit stage with heavy fog, corrugated metal backdrop panels, and downward-pointing spotlights.

08.03.2026 00:00 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Two silhouetted DJs performing on stage  bathed in dramatic yellow-green light beams.

Two silhouetted DJs performing on stage bathed in dramatic yellow-green light beams.

07.03.2026 23:55 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Nino3.4 region sea surface temperature forecast.

Nino3.4 region sea surface temperature forecast.

Wow, that's a monster signal for El NiΓ±o in today's new ECMWF seasonal forecast.

05.03.2026 19:54 πŸ‘ 93 πŸ” 36 πŸ’¬ 8 πŸ“Œ 10
Preview
GitHub - ecmwf-ifs/openifs: ECMWF OpenIFS model ECMWF OpenIFS model. Contribute to ecmwf-ifs/openifs development by creating an account on GitHub.

ECMWF's OpenIFS weather forecasting model is now fully open source on GitHub.

OpenIFS is a version of the same system used to produce our operational forecasts. After 15 years of licensed access, it's now genuinely open - publicly available with an Apache 2 licence.

github.com/ecmwf-ifs/op...

05.03.2026 08:08 πŸ‘ 0 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0
Forecast upgrade improves wind and temperature predictions An upgrade of ECMWF’s Integrated Forecasting System to Cycle 49r1 implemented on 12 November has substantially improved near-surface wind and temperature predictions, particularly for the winter months in the northern hemisphere.

The main difference is a lag in the version: the current supported OpenIFS release is Cy48r1, which was the operational IFS version until 12 Nov 2024. IFS operations is now running Cy49r1, with the main differences summarised here www.ecmwf.int/en/about/med....

05.03.2026 10:49 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
A weather chart showing pressure systems and rainfall over the North Atlantic and Western Europe, with coloured precipitation areas and labelled storm tracks.

A weather chart showing pressure systems and rainfall over the North Atlantic and Western Europe, with coloured precipitation areas and labelled storm tracks.

πŸ“£ OpenIFS is now open source!

The move will make it easier to collaborate andβ€―generateβ€―new ideas.

βž‘οΈβ€―www.ecmwf.int/en/about/med...

05.03.2026 09:18 πŸ‘ 54 πŸ” 17 πŸ’¬ 2 πŸ“Œ 3
ECMWF’s portable global forecasting model OpenIFS now available for all OpenIFS is now open source, expanding global access, accelerating innovation and strengthening collaboration.

See our news item: www.ecmwf.int/en/about/med...

05.03.2026 08:08 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

We've gradually made some components of the IFS open-source over recent years, such as the radiation scheme (github.com/ecmwf-ifs/ecrad), wave model, and land-surface model. But now we're able to release the full forecast model - no licence, no restrictions. (No data assimilation either though.)

05.03.2026 08:08 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Preview
GitHub - ecmwf-ifs/openifs: ECMWF OpenIFS model ECMWF OpenIFS model. Contribute to ecmwf-ifs/openifs development by creating an account on GitHub.

ECMWF's OpenIFS weather forecasting model is now fully open source on GitHub.

OpenIFS is a version of the same system used to produce our operational forecasts. After 15 years of licensed access, it's now genuinely open - publicly available with an Apache 2 licence.

github.com/ecmwf-ifs/op...

05.03.2026 08:08 πŸ‘ 0 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0
Open letter to the Science Minister from Heads of Physics Heads of Physics departments have expressed concern about UKRI funding changes.

An open letter has been sent to Lord Vallance from 57 heads of UK physics departments and institutes, including all of the heads of physics departments of the Russell group.

www.iop.org/about/news/o...

02.03.2026 07:54 πŸ‘ 16 πŸ” 11 πŸ’¬ 0 πŸ“Œ 2
Preview
Youth unemployment is not at its β€˜highest ever’ levels – Full Fact Conservative leader Kemi Badenoch claimed at PMQs that youth unemployment is β€˜at its highest ever’, but that’s not what the statistics show.

At #PMQs this week Kemi Badenoch claimed β€œyouth unemployment is at its highest ever”.

This isn’t correct for either the unemployment rate or the number of unemployed 16-24 year olds, according to ONS data.

27.02.2026 15:55 πŸ‘ 139 πŸ” 64 πŸ’¬ 5 πŸ“Œ 2
Abstract illustration of Earth with land mass represented by points. Additional network layer encases the globe.

Abstract illustration of Earth with land mass represented by points. Additional network layer encases the globe.

πŸ“£ Workshop on software strategies for sustainable physical modelling, 23–27 Nov 2026.

Focus on sustainable and adaptable modelling approaches for weather and climate systems, from agile coding practices to integrating machine learning into forecasting tools.

Details ➑️ events.ecmwf.int/event/529/

29.01.2026 14:31 πŸ‘ 7 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
Preview
UK should have more submarines, MPs told The UK should consider significantly expanding its submarine force as undersea threats proliferate and the barriers to entry for hostile actors continue to fall, witnesses told MPs.

The UK should consider significantly expanding its submarine force as undersea threats proliferate and the barriers to entry for hostile actors continue to fall, witnesses told MPs.
ukdefencejournal.org.uk/uk-should-ha...

15.02.2026 07:03 πŸ‘ 52 πŸ” 6 πŸ’¬ 4 πŸ“Œ 0
Post image

Senior state department official Sarah Rogers travelled to European cities in December and has spoken to key figures in Nigel Farage’s populist Reform UK party about deploying grants to spread β€˜American values’. ft.trib.al/Kx8ta8a

06.02.2026 02:41 πŸ‘ 216 πŸ” 166 πŸ’¬ 72 πŸ“Œ 89
Preview
Spotlighting The World Factbook as We Bid a Fond Farewell Somewhat devastating news today from the CIA: One of CIA’s oldest and most recognizable intelligence publications, The World Factbook, has sunset. There's not even a hint as to why they …

The CIA just stopped publishing their World Factbook and took every page, including the archived copies of previous versions!

This sucks. It was public domain, so I recovered the 2020 edition (the last one published as a zip file) and shared it to GitHub simonwillison.net/2026/Feb/5/t...

05.02.2026 00:25 πŸ‘ 6057 πŸ” 2185 πŸ’¬ 177 πŸ“Œ 196
Close-up of a large looping ring-shaped ceiling light and scattered globe lights, with an ornate theatre balcony with red seats and a gold lattice railing, and a few people seated, in the background.

Close-up of a large looping ring-shaped ceiling light and scattered globe lights, with an ornate theatre balcony with red seats and a gold lattice railing, and a few people seated, in the background.

Golden lines tracing a butterfly-shaped Lorenz attractor on a black background, showing two looping lobes connected at the centre. By Wikimol, Dschwen - Own work based on: images Lorenz system r28 s10 b2-6666.png by Wikimol and Lorenz attractor.svg by Dschwen, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=495592

Golden lines tracing a butterfly-shaped Lorenz attractor on a black background, showing two looping lobes connected at the centre. By Wikimol, Dschwen - Own work based on: images Lorenz system r28 s10 b2-6666.png by Wikimol and Lorenz attractor.svg by Dschwen, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=495592

?

01.02.2026 12:47 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 1
Interior of an ornate theatre auditorium with red tiered seating and balconies round a circular stage. Staff and audience are gathered near the stage, where a round table and other props are set, and large looping ring lights hang overhead.

Interior of an ornate theatre auditorium with red tiered seating and balconies round a circular stage. Staff and audience are gathered near the stage, where a round table and other props are set, and large looping ring lights hang overhead.

Arcadia absolutely wonderful at @oldvictheatre.bsky.social last night. Fantastic production of a masterpiece.

01.02.2026 12:42 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

I am thrilled to co‑organise Visualising Climate with colleagues from Copernicus/ECMWF, BSC, BC3 and the University of Miamiβ€”the first global conference at the intersection of climate change and data visualisation, at a moment when clear, actionable communication is essential.

#dataviz #datavis

28.01.2026 11:11 πŸ‘ 47 πŸ” 8 πŸ’¬ 3 πŸ“Œ 1
Post image Post image

Adrian Edmondson is 69.
Here he is on Desert Island Discs, talking about Rik Mayall.
If you’re lucky, you have at least one friend like Rik.
www.bbc.co.uk/sounds/play/...

24.01.2026 15:05 πŸ‘ 110 πŸ” 18 πŸ’¬ 5 πŸ“Œ 0
Vyvyan kicking his head along the railway tracks

Vyvyan kicking his head along the railway tracks

Eddie enjoying Halloween

Eddie enjoying Halloween

Happy Birthday Adrian Edmondson

24.01.2026 15:20 πŸ‘ 169 πŸ” 30 πŸ’¬ 4 πŸ“Œ 1

As National Security Adviser, I was often at the UK’s HQ in Helmand, Camp Bastion. Too often, the tannoy would announce medevac helicopters inbound. The huge base w’d fall silent, out of respect for the young men or women who were fighting for their lives. No, they had not stayed a little back.

24.01.2026 01:34 πŸ‘ 170 πŸ” 44 πŸ’¬ 4 πŸ“Œ 0
EPCC logo

EPCC logo

EPCC is hiring! We have the following vacancies:

Collaboration Manager for the UK AI Factory Antenna
Closes 14 Jan 2026
edin.ac/4oZHnuw

Applications Developers
Closes 14 Jan 2026
edin.ac/491r4HA

Applications Consultants
Closes 15 Jan 2026
edin.ac/4j0dXeq

09.01.2026 13:31 πŸ‘ 3 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
Preview
Donald Trump's Venezuela risk brings risk to China's plans The US's seizure of NicolΓ‘s Maduro carries uncertainty for China, which is is no fan of chaos.

#BBCNews - Trump's Venezuela raid has created chaos - and that is a risk for China too
www.bbc.co.uk/news/article...

07.01.2026 06:35 πŸ‘ 4 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
Preview
Every data centre is a U.S. military base - CCPA Understanding how the United States uses its tech companies to serve empire

Det kanadensiska samtalet om digital suverΓ€nitet Γ€r i full fart. Canadian Center for Policy Alternatives skeivdr under rubriken "Every data centre is a U.S military base".

www.policyalternatives.ca/news-researc...

07.01.2026 06:22 πŸ‘ 104 πŸ” 29 πŸ’¬ 1 πŸ“Œ 5
jake paul regretting the fuck out of all of his life choices that led up to this point, joshua with his right arm cocked

jake paul regretting the fuck out of all of his life choices that led up to this point, joshua with his right arm cocked

same moment but looking at joshua, smiling because he sees the fear on pauls face

same moment but looking at joshua, smiling because he sees the fear on pauls face

god damn the opposite camera's views of each of their faces is peak schadenfreude

20.12.2025 07:15 πŸ‘ 1810 πŸ” 398 πŸ’¬ 39 πŸ“Œ 119

Before the 1990s, plane crashes caused by microbursts used to kill planeloads of people fairly regularly.

Dr. Ted Fujita and NCAR scientists figured out how to detect microbursts and warn pilots about them.

Since then? Zero airliner crashes from microbursts.

17.12.2025 03:47 πŸ‘ 312 πŸ” 197 πŸ’¬ 3 πŸ“Œ 6
This is Spinal Tap. β€œIt really puts perspective on things, though, doesn’t it?” β€œYeah, too much. There’s too much fucking perspective now.”

This is Spinal Tap. β€œIt really puts perspective on things, though, doesn’t it?” β€œYeah, too much. There’s too much fucking perspective now.”

15.12.2025 05:44 πŸ‘ 8334 πŸ” 2078 πŸ’¬ 17 πŸ“Œ 30

Anyone understand the logic for Bluesky now requiring age verification (in UK) before you can mute words?

Realised my muted words list is suddenly empty and I can’t add new words. Change VPN to a different country and it’s restored.

11.12.2025 08:25 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 1
Preview
What will be the cost of Keir Starmer’s new medicines deal with Donald Trump? British lives | Aditya Chakrabortty More than Β£3bn that could have been used for UK patients will go to big pharma for its branded products, says Guardian columnist Aditya Chakrabortty

On the UK-US pharmaceutical deal I'm afraid this does look like two nasty trends coming together to make a very bad agreement for the UK - namely Whitehall power to make deals with no scrutiny, and companies working with countries to coerce others. www.theguardian.com/commentisfre...

11.12.2025 06:57 πŸ‘ 145 πŸ” 124 πŸ’¬ 4 πŸ“Œ 10
Silhouette of a skateboarder in a mid-air grab with a cloudy blue sky as the background

Silhouette of a skateboarder in a mid-air grab with a cloudy blue sky as the background

Going through old photos and found this gem from when I was into skateboard photography. I think this might be Steve Caballero, circa 1998 @vanswarpedtour.bsky.social @transworldskate.bsky.social #ShotOnFilm

02.12.2025 00:52 πŸ‘ 90 πŸ” 13 πŸ’¬ 3 πŸ“Œ 2