Colin Raymond
regclimo.bsky.social
Colin Raymond
@regclimo.bsky.social
Climate scientist at UCLA
Reposted by Colin Raymond
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...
January 8, 2026 at 5:33 PM
The main ideas from our recent study, bite-sized!
January 8, 2026 at 6:55 PM
Reposted by Colin Raymond
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
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.
deepconvection.substack.com
December 21, 2025 at 7:25 PM
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
November 24, 2025 at 8:09 PM
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!
November 21, 2025 at 9:00 AM
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.
November 21, 2025 at 9:00 AM
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...
November 21, 2025 at 9:00 AM
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/...
agupubs.onlinelibrary.wiley.com
November 21, 2025 at 9:00 AM
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...
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.
www.realitystudies.co
November 14, 2025 at 7:42 PM
Reposted by Colin Raymond
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
November 10, 2025 at 1:15 PM
Reposted by Colin Raymond
🚨 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.
September 23, 2025 at 6:18 PM
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.
September 3, 2025 at 6:32 PM
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
September 3, 2025 at 6:32 PM
Reposted by Colin Raymond
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
August 27, 2025 at 10:36 PM
Reposted by Colin Raymond
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
August 15, 2025 at 11:22 PM
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.
August 14, 2025 at 9:41 PM
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...
ametsoc.net
August 14, 2025 at 9:41 PM
Reposted by Colin Raymond
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!
August 7, 2025 at 9:03 PM
This is a perceptive question, which I forwarded along to Adrienne. Lmk if we didn't use the right email for you
July 23, 2025 at 7:53 PM
Reposted by Colin Raymond
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.
July 9, 2025 at 8:35 PM
Reposted by Colin Raymond
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
July 2, 2025 at 8:23 PM
...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....
“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...
dx.doi.org
July 1, 2025 at 9:20 PM
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'...
July 1, 2025 at 9:20 PM
Excited to check this out! There's a real unfilled niche here.
June 20, 2025 at 2:04 PM
@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...
June 20, 2025 at 2:00 PM