Yesterday was "Copernicus Day", a monthly holiday for weather nerds around the world 🤓

A whole bunch of new seasonal climate data just dropped, providing a glimpse at patterns in the months ahead.

🧵 Here's a quick thread about what it's showing... A developing La Niña (cool equatorial Pacific) is expected to become the main climate driver in the second half of 2024.

Most elsewhere, global sea surface temperatures are forecast to be above or well above average, contributing to marine heatwaves and warmer air temperatures.

🧵 May 2024 climatic pulse of the planet…

My goal is to provide simple-yet-powerful information that quantifies last month’s extremes in near-real time - to let the data speak.

We’ll explore temperatures (air & sea), rain, snow, wind, cloud cover, humidity & heat stress ⬇️ May 2024 heat extremes (red, 43% coverage) greatly outpaced cold extremes (blue, 2% coverage).

This is not normal.

While a 1:1 ratio is not to be expected, such a large difference between the two suggests something is out of balance.

A whole bunch of new seasonal climate data just dropped!

Yesterday was "Copernicus Day", a monthly holiday for weather nerds around the world 🤓

🧵 Here's a quick thread about what it's showing for the months ahead 🔮 Above average temperatures (🔴) are almost exclusively predicted worldwide from June-August 2024, aside from La Niña in the equatorial Pacific & a few patchy cool areas.

A hotter than average summer is forecast in the U.S. + Europe & many parts of the Northern Hemisphere.

In the spirit of #COP26, I've put together a few climate charts for measuring change in the #HudsonValley.

We are getting warmer, more humid, and there's more moisture in our atmosphere.

Our future may be a bit foggy, but it's in our hands.

🧵 on our changing climate... #HudsonValley temperatures: 📈

Years with ≤50˚F average temperatures are a thing of the past.

Our future? 55-60˚F average annual temperatures. That's more like Philadelphia or Washington D.C.

December 2021: this forecast of stratospheric temperature anomalies is pretty unusual 🔴

How unusual? The zonal mean anomaly between 60-90˚N is the *2nd warmest* predicted by @ECMWF (from September) compared to all years from 1993-2020.

🧵 Thread: winter forecast tea leaves 🌿 The stratospheric polar vortex, located high up in our atmosphere above the poles during winter, weakens substantially about ~6 times per decade when a sudden warming & west-to-east wind reversal occurs.

This can end up bringing cold weather to the troposphere, where we live 🥶