Proud to share our new paper in npj Clim. Atmos. Sci. (@SpringerNature)! Our findings: 1️⃣ reduce uncertainty in mid-latitude climate projections 2️⃣ increase confidence that #ClimateModels correctly predict a future poleward shift of the #JetStream Read the paper here 👉 rdcu.be/eS73b #ClimateScience

Honoured to open @ipcc.bsky.social's first Lead Author Meeting for AR7 in Paris today. Congratulations to 600+ authors on their appointments—this marks the beginning of our scientific assessment. Thank you to France for generously hosting this historic meeting. 🔗 bit.ly/4ir09cC

An unusually early sudden stratospheric warming event is likely to send the polar vortex on the move. Questions exist re: how this will affect US weather, but odds for colder, snowier weather are ticking up esp. in Central/Eastern US www.cnn.com/2025/11/19/w...

The ensemble mean from today's IFS subseasonal run almost predicts the earliest major sudden stratospheric warming on record 😮 Will be interesting to see if this signal progresses as it is just on the cusp of typical SSW prediction lead-times – daily runs of 101 members can still vary a fair bit

Is the polar vortex responsible for the current cold snap over much of the U.S.? Our experts discuss this in our most recent Polar Vortex Blog: www.climate.gov/news-feature...

A reminder that earth.nullschool.net is a great resource for visualising the weather now. #StormDarragh visible in the surface image below; going to different pressure levels will help you see the jet stream. (Thanks @cambecc.bsky.social!)

Here is why 2024 is virtually certain be the warmest year on record and first one above 1.5°C 👇

I've made a starter pack of people who work on the stratosphere/middle atmosphere and/or often post about the stratosphere, including forecasts of the polar vortex. Please do suggest anyone I've missed – quite hard to keep up with everyone on here now! go.bsky.app/MxwzdEi