screenshot of a resignation letter expressing sadness at leaving NASA

My resignation letter

Map of U.S., from coolwx.com, showing locations currently experiencing record-breaking temperatures. There are countless such locations in the Western U.S., with hundreds of red dots (locations breaking daily record highs) and countless pink dots (locations breaking March monthly record highs). The region of record heat extends from the Pacific Coast to east the Mississippi River, and from Canada to Mexico. The region of red and pink dots is vastly larger even than yesterday's (or the day before, or the day before, or the day before, same as it ever was, same...as it ever was...).

Incredibly, even *more* locations across U.S. are today experiencing their warmest March temperatures on record--many by a wide margin, with some even breaking April records. This includes most or all of: AZ, UT, CO, NM, WY, NE, KS, MO, IA, plus portions of many other states. 🫠

A map of the US with each 2025 billion-plus dollar weather and climate disaster geo-located on it. Source: Climate Central

After the US admin cancelled the $B Climate + Weather Disaster dataset, @climatecentral.org hired the scientists who ran it and set it back up.

Now the 2025 numbers are in: it's 3rd highest year on record and highest year w/o land-falling hurricanes.

More: www.climatecentral.org/climate-serv...

The main ideas from our recent study, bite-sized!

Save NCAR Field notes from New Orleans, where I and 20,000 colleagues learned that Trump intends to destroy the National Center for Atmospheric Research.

Some reflections after returning back from a conference at which I and 20,000 colleagues learned that the Trump administration intends to dismantle #NCAR. This outrage should not happen. deepconvection.substack.com/p/save-ncar

Flyer

The next @riskkan.bsky.social Compound Events webinar will be Tues 2 Dec at 11am UTC with a presentation from Xinyue Liu (NUS) on "Climate signals behind synchronized locust outbreak risks". For Zoom info: groups.google.com/u/1/g/riskka... or message @regclimo.bsky.social

Sincere thanks to @vikkithompson.bsky.social, @drlaurasuarez.bsky.social, and @karinvdwiel.bsky.social for the data, concepts, and support to see this work over the finish line!

Specifically, we devise a combined reanalysis/model estimate of the likelihood of current records being broken, in which the eastern US, eastern China, & Australia stand out. We also find MENA and the tropics endure the most severe, long-lasting, and clustered events, and the greatest uncertainties.

Alarmingly, the single largest ERA5 daily wet-bulb temp affects estimated return periods by a factor of >3 or even >10 in many regions, including those where JRA55 and NOAA20CR agree well. We address this undersampling of possibilities by bringing in large ensembles...

What do we talk about when we talk about unprecedentedness? Without a clear baseline, understanding & preparedness for climate extremes may be out of whack. We sought to improve this for humid heat in our new paper out now in @aguadvances.bsky.social: agupubs.onlinelibrary.wiley.com/doi/10.1029/...

Understanding Wet-Bulb Temperature, Climate Extremes, & Systemic Risk—& How We Build Resilience - Colin Raymond | #56 The unfortunate reality is we're going to be learning about WBTs the hard way more and more—so let's dig into what they are & what we can do to stay safe.

I recently had the pleasure of appearing on @urgentfutures.bsky.social for a meticulous, wide-ranging conversation about heat hazards, risks, and potential actions. Many thanks to host Jesse Damiani for the invitation and adroit questions! www.realitystudies.co/p/understand...

We are very delighted to have @karinvdwiel.bsky.social and @regclimo.bsky.social as invited speakers in our #EGU26 session on NH11.2 Future Changes in Weather and Climate Hazards!

Consider to present your fantastic work with us!!

@nh.egu.eu
@pik-potsdam.bsky.social

🚨 NCA5 is now LIVE! 🚨

They took it down, but we've brought it back at: nca5.climate.us

Bookmark. 👏 this. 👏 page. 👏

This is just our first step in restoring trusted science information that Americans need to understand what's happening with the climate.

The year 2025 and this podcast's title have partly converged, but other social, technological, etc. trends also feature prominently. As always, the new season contemplates topics that feel fresh and necessary, aiming to come to some fuller understanding. At the least, this helps preserve sanity.

A new season of Climate Quandaries is out! Spotify: open.spotify.com/show/7FF7raV..., Apple Podcasts: podcasts.apple.com/us/podcast/c.... Many thanks to excellent guests @jonathanrbuzan.bsky.social, Corey Lesk, @nicolamaher.bsky.social, @climatehuman.bsky.social

Current snapshot from NAEFS Situational Awareness Tool depicting a high likelihood of record-breaking 200mb ridge magnitude near British Columbia in a week.

Multiple model ensembles are already suggesting a broad region of record mid-tropospheric ridging over the far NE Pacific and Washington/British Columbia, with possible record-breaking late-season warmth in the same region. That's a very strong signal ~1 week out. #WAwx #ORwx #BCwx

Summer heat across the Eastern U.S. is off the charts in a new "stickiness" measurement that combines heat and humidity—and it isn’t over yet.

🔗: on.wsj.com/3Uwf7D1

2024 was another boom year for humid heat, esp. in East/South Asia. Hats off to Kate Willett and all for packing much info and definitional complexity into the kind of thing one could read over breakfast -- if one likes to start the day with multi-panel figures and intricately abbreviated variables.

This has been my second year contributing to the "Humid-Heat Extremes Over Land" section of the venerable AMS State of the Climate report. (It starts on the 48th page.) ametsoc.net/sotc2024/02G...

Engrossing meeting of the minds at the workshop this week. Nine creative yet plausible storylines were developed and a whole range of new cxns made. Thanks again to all who attended, and especially those who made it happen. We're excited to see what this format & these ideas can catalyze!

This is a perceptive question, which I forwarded along to Adrienne. Lmk if we didn't use the right email for you

There is a new CLIVAR working group focused on climate risk (I'm one of the organizers). We are having our first public webinar tomorrow 7/10 at 1 pm ET. We have some FANTASTIC speakers including @kellyhereid.bsky.social, @climatefran.bsky.social, and Zong-Liang Yang.

Working on climate-related disasters or multi-hazard risks? Submit your abstract to NH012 – Compound, Consecutive, and Cascading Events: Challenges for Risk Assessment and Management at #AGU25!
@regclimo.bsky.social @monahemmati.bsky.social @kyoungchoi.bsky.social @pravinm.bsky.social

“Which Projections Do I Use?” Strategies for Climate Model Ensemble Subset Selection Based on Regional Stakeholder Needs Within an ensemble, projected changes from individual downscaled models can differ dramatically pre and post downscaling Reliable interpretations require maximum retention of ensemble information...

...with profound implications for results (in both current and future climates) if left unaccounted for. More details in the paper: dx.doi.org/10.1029/2025....

It's often assumed that the best approach for climate applications is to select the best models, downscale them, and compute statistics of interest. In fact, in new work led by Adrienne Wootten, we find the downscaling process scrambles the meaning of 'best'...

Excited to check this out! There's a real unfilled niche here.

@ajezeq.bsky.social will give the next @riskkan.bsky.social Compound Events webinar Tues Jul 1 at 14UTC, speaking about attribution of extremes with special focus on compounding interactions. Great chance to hear about & discuss a truly cutting-edge area! columbiauniversity.zoom.us/j/9537980484...

Totally Cooked: The Weather & Climate Podcast The climate is changing. So is the conversation. Totally Cooked is a podcast about weather, climate change, and what it all means for life on Earth.

The first 3 eps of TOTALLY COOKED have landed!
Check it out for weather & climate in a factual, relatable & often humorous way.
Available below, & where you get your podcasts.
Like, follow & share.
Let's tackle the climate crisis together.
#totallycooked
www.21centuryweather.org.au/engage/total...

The Weather & Climate Livestream | Schedule Join us starting May 28th, as meteorologists and climate scientists from across the US share their research and answer your questions.

I strongly encourage folks to check out the rest of the event, which will feature dozens of speakers over a 5 day period. The line-up is genuinely impressive--a veritable who's who of the American #weather and #climate world in 2025--so I'll be watching! wclivestream.com/schedule

There’s so much happening right now, I thought I’d put together a running thread on the dismantling of #climate and research and knowledge infrastructure in the United States 🧵