Sign in

Colin Raymond

@regclimo.bsky.social
2.8K followers 50 following 53 posts

Climate scientist at UCLA

PostsRepliesMedia
Reposted by Colin Raymond
The New York Times @nytimes.com · 12/09/2026
In @nytopinion.nytimes.com The more Stephen Witt learns about rogue A.I. systems, he writes, “the more I am reminded of the first two months of 2020, when a small group of epidemiologists was attempting to raise alarms about Covid. We have a short window, right now, to rein these systems in.”
nyti.ms
Opinion | This Is Really Bad
We can no longer pretend that A.I. is safe.
1414952
Reposted by Colin Raymond
Casey Ivanovich @ccivanovich.bsky.social · 10/09/2026
I had the exciting opportunity to write a guest post for @carbonbrief.org about our new paper on the expansion of extreme heat seasons around the world. Take a read for a digestible summary of our approach and key results!
03217
Reposted by Colin Raymond
Daniel Swain @weatherwest.bsky.social · 08/09/2026
We may seem some genuinely extreme humidity levels along SoCal coastal plain Tue-Wed (yes, even worse than today). As Marie's tropical moisture lingers, temps of 90-100F will combine with dew points of 70F to nearly 80F (!), yielding heat index values as high as ~110F. #CAwx
Map showing predicted heat index values over SoCal on Wed from ECMWF model. They are widely above 100F, and locally as high as 110F.Map showing predicted humidity (dew point temperatures) over SoCal on Wed from ECMWF model. They are widely above 70F, and locally as high as 80F.
10272115
Reposted by Colin Raymond
Kai Kornhuber @kornhuber.bsky.social · 07/09/2026
Excited to share our new perspective on Usable Compound Event Research: nhess.copernicus.org/articles/26/... We provide principles to navigate the pressing needs for more granular climate risk information in times of increasingly complex extreme weather events. @iiasa.ac.at @riskkan.bsky.social
nhess.copernicus.org
Invited perspectives: Towards usable compound event research
Abstract. Supporting stakeholders with science-based decision-making to mitigate and adapt to climate change impacts is a central mandate of the climate research community. In particular, mapping out ...
12013
Reposted by Colin Raymond
CompoundNET @compoundnet.bsky.social · 29/08/2026
‘Understanding and predicting compound coastal flooding remains one of the most challenging problems in hydrologic and coastal sciences.’ Read the latest ‘State of Science’ blog on compound coastal flooding by Hamed Moftakhari: wp.me/p9wIOV-Xp @regclimo.bsky.social @cassro314.bsky.social
"State of the Science" graphic from CompoundNET featuring an open book with a lightbulb icon and the CompoundNET logo. Title: "Modeling of Compound Coastal Flooding," by Hamed Moftakhari (University of Alabama). Text below invites readers to share a brief summary of what they find most fascinating about new advances in their favorite research topic.
023
Reposted by Colin Raymond
CompoundNET @compoundnet.bsky.social · 17/08/2026
🌡️ 💧 This summer we kicked off the 'State of the Science' blog series with a piece on Heat and Humidity Extremes by Colin Raymond @regclimo.bsky.social : wp.me/p9wIOV-WU 📖 Follow along the blog series for a quick overview on the latest research in compound events, a new post is coming out soon! 👀
Graphic for 'State of the Science' blog series. Text reads: 'New Blog series: In ~400 words, tell us what you find most fascinating about the new advances in your favorite research topic!' Below is the title 'Heat and Humidity Extremes' by Colin Raymond (UCLA). Includes a lightbulb-over-book icon and the CompoundNET logo.
033
Colin Raymond @regclimo.bsky.social · 11/08/2026
A sticky situation: measures of high humid heat in 2025 mostly ranked the 3rd or 4th highest ever (below the El Niño-driven records of 2023 and 2024). East & South Asia were particularly struck by oppressive conditions, with up to 100 days seeing values historically reached on only 36 days.
141
Colin Raymond @regclimo.bsky.social · 20/07/2026
@compoundnet.bsky.social's new "State of the Science" mini-blog series: a fully human summary of recent advances & current frontiers for compound events, hopefully of special value for ECRs. The first edition, on heat & humidity extremes, is live at bit.ly/4buNAL6. Many thx @afsribeiro.bsky.social!
compoundevents.org
Heat and Humidity Extremes (covering years 2023-26)
State of the Science Blog by Colin Raymond (UCLA) The last few years have seen considerable progress toward identifying the atmospheric processes that control the most intense humid-heat episodes1,…
0103
Reposted by Colin Raymond
RiskKAN @riskkan.bsky.social · 01/07/2026
The next Risk KAN Compound Events webinar will take place on Tuesday 7 July 8 am UTC. Ben Hague (@bhcoastal.bsky.social) will give a presentation on compound flooding in Australian estuaries under climate change. For meeting info: groups.google.com/u/1/g/riskka... or message @cassro314.bsky.social
Flyer displaying information mentioned in post as well as affiliations: WCRP, IRDR, WWRP, and Future Earth.
155
Colin Raymond @regclimo.bsky.social · 08/06/2026
Which compound weather and climate events mattered most in 2025? In a new report in @natrevearthenviron.nature.com we've taken a systematic global view to survey these events and their impacts across 5 typologies. rdcu.be/fmeAh We hope it proves useful for looking back on 'the year that was'...
rdcu.be
Compound weather and climate events in 2025
Nature Reviews Earth & Environment - Compound weather and climate events in 2025
185
Colin Raymond @regclimo.bsky.social · 22/04/2026
Multi-hazard researchers and practitioners: Check out the new magnum opus led by Timothy Tiggeloven at @ivm-vu-amsterdam.bsky.social, with reflections and recommendations that aim to focus energy & investment at this critical juncture. Valuable for the reference list alone! doi.org/10.5194/gc-9...
doi.org
Multi-hazard risk assessment and management: pathways for the Sendai Framework and beyond
Abstract. Multi-hazard events pose increasingly complex challenges as natural hazards interact in cascading and compounding ways that amplify risks beyond individual hazards. Understanding these inter...
043
Reposted by Colin Raymond
Kate Marvel @drkatemarvel.bsky.social · 25/03/2026
My resignation letter
screenshot of a resignation letter expressing sadness at leaving NASA
7939071012
Reposted by Colin Raymond
Daniel Swain @weatherwest.bsky.social · 21/03/2026
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. 🫠
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...).
14399193
Reposted by Colin Raymond
Katharine Hayhoe @katharinehayhoe.com · 08/01/2026
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...
A map of the US with each 2025 billion-plus dollar weather and climate disaster geo-located on it. Source: Climate Central
181042506
Colin Raymond @regclimo.bsky.social · 08/01/2026
The main ideas from our recent study, bite-sized!
010
Reposted by Colin Raymond
Adam Sobel @adamsobel.bsky.social · 21/12/2025
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
deepconvection.substack.com
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.
112249
Colin Raymond @regclimo.bsky.social · 24/11/2025
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
Flyer
085
Colin Raymond @regclimo.bsky.social · 21/11/2025
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
1112
Colin Raymond @regclimo.bsky.social · 14/11/2025
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...
realitystudies.co
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.
0135
Reposted by Colin Raymond
Yinglin Tian @yinglintian.bsky.social · 10/11/2025
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
053
Reposted by Colin Raymond
Climate.us @climate.us · 23/09/2025
🚨 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.
6249115
Colin Raymond @regclimo.bsky.social · 03/09/2025
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
141
Reposted by Colin Raymond
Daniel Swain @weatherwest.bsky.social · 27/08/2025
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
Current snapshot from NAEFS Situational Awareness Tool depicting a high likelihood of record-breaking 200mb ridge magnitude near British Columbia in a week.
2337
Reposted by Colin Raymond
The Wall Street Journal @wsj.com · 16/08/2025
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
9255
Colin Raymond @regclimo.bsky.social · 14/08/2025
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
110
Reposted by Colin Raymond
Compound Risks Workshop 2025 @cccriskworkshop25.bsky.social · 07/08/2025
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!
087
Reposted by Colin Raymond
Andrew Dessler @andrewdessler.com · 09/07/2025
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.
34519
Reposted by Colin Raymond
Sara Santamaria-Aguilar @sarastmariaa.bsky.social · 02/07/2025
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
073
Colin Raymond @regclimo.bsky.social · 01/07/2025
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'...
162
Colin Raymond @regclimo.bsky.social · 20/06/2025
@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...
021
Reposted by Colin Raymond
Sarah Perkins-Kirkpatrick @sarahinscience.bsky.social · 20/06/2025
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...
21centuryweather.org.au
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.
22511
Reposted by Colin Raymond
Daniel Swain @weatherwest.bsky.social · 28/05/2025
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
wclivestream.com
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.
111029
Reposted by Colin Raymond
Bob Kopp @bobkopp.net · 07/05/2025
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 🧵
631290788
Colin Raymond @regclimo.bsky.social · 28/04/2025
One week left to sign up for this summer's compound-event storyline workshop @cccriskworkshop25.bsky.social in Portland, OR! See cccriskworkshop2025.org for more info including the latest agenda & confirmed speakers
cccriskworkshop2025.org
Compounding, cascading, and critical risks to U.S. infrastructure and security
a systems-focused compound-hazard workshop
020
Reposted by Colin Raymond
Noam Ross @noamross.net · 19/04/2025
🚨Report your NSF grant terminations! 🚨 We are starting to collect information on NSF grant terminations to create a shared resource as we have for NIH. The more information we collect, the more we can organize, advocate, and fight back! Please share widely! airtable.com/appGKlSVeXni...
NSF Grant Termination Information Collection Form

Please use this form to submit information identifying specific NSF grants that have been cancelled for any reason after January 20, 2025.


We are tracking these grants to increase transparency, organize affected PIs, and facilitate responses, including via litigation. Please share the form as widely as possible with your networks. 


We are actively building a pipeline to organize these terminations and will soon have a tracker akin to our NIH grant tracker at https://airtable.com/appjhyo9NTvJLocRy/shrNto1NNp9eJlgpA


WE WILL NOT DISCLOSE THE IDENTITY OF ANYONE WHO USES THIS FORM TO PROVIDE INFORMATION. We will keep your identity confidential.


These resources are maintained by Noam Ross of rOpenSci and Scott Delaney of the Harvard T.H. Chan School of Public Health, with input and support from additional volunteers. For any questions, please contact Scott Delaney on Signal (sdelaney.84).


THANK YOU FOR YOUR ASSISTANCE!
7636659
Reposted by Colin Raymond
Christopher Mims @mims.bsky.social · 18/04/2025
The American Meteorological Society has issued this dire warning of "disastrous consequences" for America's ability to predict lethal weather: "The administration's 2026 budget... would close all of NOAA’s weather, climate, and ocean Laboratories." www.ametsoc.org/ams/about-am...
ametsoc.org
Stand Up for NOAA Research – The Time to Act is Now
The AMS is a global community committed to advancing weather, water, and climate science and service.
4217124
Colin Raymond @regclimo.bsky.social · 12/04/2025
Quick-hitting global retrospective led by @zscheischlerjak.bsky.social on 2024's additions to the ranks of notable compound weather/climate events. We document a variety of severe impacts mostly involving heat and hydroclimatic extremes. Rdcu.be/ehodf
rdcu.be
Compound weather and climate events in 2024
Nature Reviews Earth & Environment - 2024 saw multiple high-impact compound events. Record-breaking global temperatures combined with regional weather variability to create compound floods,...
11611
Colin Raymond @regclimo.bsky.social · 10/04/2025
Under the auspices of @compoundnet.bsky.social, I'm pleased to be coordinating the new "Recent Reads" series, in which prominent researchers describe a selection of recent papers that have affected their thinking about the direction or implications of compound-events work. wp.me/p9wIOV-Sy
wp.me
Recent reads by Sha Zhou
In the new “Recent Reads” series, prominent researchers describe a selection of papers from the last few years that have made an impact on their thinking about the direction of compound…
141
Reposted by Colin Raymond
Compound Risks Workshop 2025 @cccriskworkshop25.bsky.social · 28/03/2025
There have been some reports of troubles connecting to our workshop website. We've created a read-only Google Doc mirror which lacks beauty but makes up for it with functionality: docs.google.com/document/d/1...
docs.google.com
Mirror of website for "Compounding, cascading, and critical risks to U.S. infrastructure and security" workshop
Compounding, cascading, and critical risks to U.S. infrastructure and security A SYSTEMS-FOCUSED COMPOUND-HAZARD WORKSHOP August 4-6, 2025 — Portland, OR ...
011
Colin Raymond @regclimo.bsky.social · 11/03/2025
Compound-events community! Please join us Aug 4-6 in Portland, OR for a workshop connecting research and practice through systems-focused storylines. More info at cccriskworkshop2025.org, including a chance to provide input on priority themes. We're also on Bluesky: @cccriskworkshop25.bsky.social
283
Reposted by Colin Raymond
Zack Labe @zacklabe.com · 05/03/2025
Hi - I'd like to share this story of what is happening at NOAA GFDL, where some of my colleagues and I worked until the mass firings at NOAA last week. "...the birthplace of weather and climate forecasting"
science.org
NOAA firings hit the birthplace of weather and climate forecasting
Dismissed researchers were improving severe weather predictions
331113538
Reposted by Colin Raymond
Daniel Swain @weatherwest.bsky.social · 05/02/2025
The U.S. #NationalWeatherService, housed within #NOAA, is a truly world-class meteorological predictive service, perhaps singularly so. It costs only ~$3/yr per taxpayer, & yields ~10:1 return on investment--saving economy 10s-100s of billions, not to mention thousands of lives.
6025171051
Colin Raymond @regclimo.bsky.social · 04/02/2025
For extreme heat, each year seems to bring fresh examples of precedents being surpassed — in heat severity, but also in understanding of its physics and risks. A group of us led by Tom Matthews and Radley Horton have assembled a review of this knowledge whirlwind: www.nature.com/articles/s43...
nature.com
Mortality impacts of the most extreme heat events - Nature Reviews Earth & Environment
Extreme heat is increasing in magnitude and frequency, threatening human health. This Review assesses mortality risk associated with extreme heat, revealing that human thermal tolerances (that is, unc...
23912
Reposted by Colin Raymond
CompoundNET @compoundnet.bsky.social · 04/02/2025
Did you miss the #AGU24 session on Compound, Consecutive, and Cascading Events? No worries! Read this fantastic summary of the session by hmgarciaaa.bsky.social: 📖 compoundevents.org/blog/agu-202...
compoundevents.org
AGU 2024 Session on Compound, Consecutive, and Cascading Events
By Helena Garcia, University of North Carolina at Chapel Hill Conveners: Alejandra Enriquez, Helena Garcia, Mona Hemmati, Md Mamunur Rashid, Colin Raymond, Marleen de Ruiter, Cass Rogers, Antonia S…
034
Colin Raymond @regclimo.bsky.social · 18/12/2024
Some thoughts from our team, led by Tom Matthews, on how the 2024 Hajj heat tragedy can be seen as a shot across the bow from a changing climate -- and the critical data and research-to-action hurdles which it exemplifies. doi.org/10.1038/s415...
180
Reposted by Colin Raymond
R. Daniel (Danny) Bressler @rdbressler.bsky.social · 06/12/2024
🚨"Heat disproportionally kills young people: Evidence from Wet-Bulb Temperature Exposure" My new paper co-lead with @ajsw.info is out today! Using 20 years of nationwide mortality microdata + wet-bulb temperature, we uncovered fascinating new findings. Thread 👇 www.science.org/doi/10.1126/...
science.org
Heat disproportionately kills young people: Evidence from wet-bulb temperature in Mexico
Analysis of temperature exposure and microdata finds the majority of heat-related deaths are among people under 35 years old.
410248
Reposted by Colin Raymond
R. Daniel (Danny) Bressler @rdbressler.bsky.social · 26/11/2024
In the depths of Covid in 2020, @ajsw.info @ccivanovich.bsky.social and I started a stream of work that leverages the excellent nationwide microdata available in Mexico to estimate the impact of hot and cold wet bulb temperatures on mortality. rdanielbressler.com/s/20241030-M...
rdanielbressler.com
142
Colin Raymond @regclimo.bsky.social · 17/10/2024
Risk KAN: Compound Events webinars are continuing! Next is Fri Nov 8 at 3pm UTC with Thomas Froelicher speaking about "Compound marine heatwaves and biogeochemical extremes: Drivers, changes and impacts". Zoom info: columbiauniversity.zoom.us/j/9214456771...
100
Colin Raymond @regclimo.bsky.social · 16/10/2024
No matter how intense the humid heat, it might be thought that sunset and a refreshing sea breeze will always bring some relief. But close examination of the Persian/Arabian Gulf region dispels these assumptions, as explored in our new Comms E&E paper: rdcu.be/dWXl5
rdcu.be
Evening humid-heat maxima near the southern Persian/Arabian Gulf
Communications Earth & Environment - Land-sea breezes lead to unexpected daily maxima in extreme humid heat - associated with heat-stress risk - in the evening or at night in the Arabian...
142
Colin Raymond @regclimo.bsky.social · 07/10/2024
Phoenix’s streak of consecutive record-setting days, already 13, will reach an amazing 20 if the current forecast holds. Among all global locations with 50+ years of data, the only comparable streaks have been on various tropical Pacific islands, plus the Russia 2010 mega heat wave.
120