Daniel Swain
@weatherwest.bsky.social
Weather and climate scientist focused on extreme events like floods, droughts, & wildfires on a warming planet. www.weatherwest.com
Reposted by Daniel Swain
Widespread rainfall, likely on order of at least a couple of inches, is likely later next week in Norcal; in SoCal, rain of some magnitude appears increasingly likely but there is wider plausible range (from light-moderate to rather heavy). But confidence is high in *some* rain.
November 8, 2025 at 11:19 PM
Widespread rainfall, likely on order of at least a couple of inches, is likely later next week in Norcal; in SoCal, rain of some magnitude appears increasingly likely but there is wider plausible range (from light-moderate to rather heavy). But confidence is high in *some* rain.
Reposted by Daniel Swain
Then, by late week, pronounced ridge-trough pattern over continental U.S. will shift eastward & partially break down--likely opening the "storm door" along the West coast. A pretty wet period is likely thereafter, with moderate to even heavy rain extending all the way into SoCal.
November 8, 2025 at 11:19 PM
Then, by late week, pronounced ridge-trough pattern over continental U.S. will shift eastward & partially break down--likely opening the "storm door" along the West coast. A pretty wet period is likely thereafter, with moderate to even heavy rain extending all the way into SoCal.
Reposted by Daniel Swain
As the ridge-trough sequence reached maximum amplitude on Tue, very warm temperatures will continue in the West but anomalously cold temperatures will develop in the East. In fact, there may even be a day or two of record cold temps in parts of the Southeast.
November 8, 2025 at 11:19 PM
As the ridge-trough sequence reached maximum amplitude on Tue, very warm temperatures will continue in the West but anomalously cold temperatures will develop in the East. In fact, there may even be a day or two of record cold temps in parts of the Southeast.
Reposted by Daniel Swain
Over the next few days, balmily warm temperatures will occur across western North America, including California (where temperatures into the 90s are likely in SoCal). Some record warm daytime temperatures are possible, & notably warm overnight temperatures will continue as well.
November 8, 2025 at 11:19 PM
Over the next few days, balmily warm temperatures will occur across western North America, including California (where temperatures into the 90s are likely in SoCal). Some record warm daytime temperatures are possible, & notably warm overnight temperatures will continue as well.
Reposted by Daniel Swain
A high-amplitude flow pattern, characterized by near-record strength ridging and troughing (respectively) over the western and eastern U.S. and a very wavy jet stream, will bring a progression of notable weather to North America in the coming days.
November 8, 2025 at 11:19 PM
A high-amplitude flow pattern, characterized by near-record strength ridging and troughing (respectively) over the western and eastern U.S. and a very wavy jet stream, will bring a progression of notable weather to North America in the coming days.
A high-amplitude flow pattern, characterized by near-record strength ridging and troughing (respectively) over the western and eastern U.S. and a very wavy jet stream, will bring a progression of notable weather to North America in the coming days.
November 8, 2025 at 11:19 PM
A high-amplitude flow pattern, characterized by near-record strength ridging and troughing (respectively) over the western and eastern U.S. and a very wavy jet stream, will bring a progression of notable weather to North America in the coming days.
Reposted by Daniel Swain
The Vietnamese Bach Ma Mountain Peak station recorded one-day rainfall of 1,739 mm - close to the global one-day record and perhaps a new record for the northern hemisphere. It is part of a deluge Viet Nam has seen in October, shattering 35 precip records. e.vnexpress.net/news/news/en...
Vietnam sees 35 rainfall records broken in October - VnExpress International
Vietnam's northern and central regions saw a total of 35 rain records broken in October alone as two storms, Matmo and Fengshen, caused unprecedented downpours.
e.vnexpress.net
November 7, 2025 at 9:00 PM
The Vietnamese Bach Ma Mountain Peak station recorded one-day rainfall of 1,739 mm - close to the global one-day record and perhaps a new record for the northern hemisphere. It is part of a deluge Viet Nam has seen in October, shattering 35 precip records. e.vnexpress.net/news/news/en...
Reposted by Daniel Swain
In case you missed it live last night, a recording of my presentation for the National Academy of Sciences' public lecture series is now available on YouTube. "Climate Change through the Lens of Increasing Hydroclimate Whiplash"
Climate Change through the Lens of Increasing Hydroclimate Whiplash
The past decade has brought episodes of exceptional and even historically unprecedented warmth, both in California and around the world. But perhaps even more disruptive than rising global average temperatures and record-breaking regional heatwaves have been the pronounced dry and wet extremes exper
youtu.be
November 7, 2025 at 5:15 AM
In case you missed it live last night, a recording of my presentation for the National Academy of Sciences' public lecture series is now available on YouTube. "Climate Change through the Lens of Increasing Hydroclimate Whiplash"
In case you missed it live last night, a recording of my presentation for the National Academy of Sciences' public lecture series is now available on YouTube. "Climate Change through the Lens of Increasing Hydroclimate Whiplash"
Climate Change through the Lens of Increasing Hydroclimate Whiplash
The past decade has brought episodes of exceptional and even historically unprecedented warmth, both in California and around the world. But perhaps even more disruptive than rising global average temperatures and record-breaking regional heatwaves have been the pronounced dry and wet extremes exper
youtu.be
November 7, 2025 at 5:15 AM
In case you missed it live last night, a recording of my presentation for the National Academy of Sciences' public lecture series is now available on YouTube. "Climate Change through the Lens of Increasing Hydroclimate Whiplash"
Reposted by Daniel Swain
I just recorded a short video--essentially an updated version of my social media threads--on the Bill Gates climate memo. Despite agreeing with some points therein, I still think its framing is fundamentally flawed and thus also its key conclusions.
Thoughts from a climate scientist on the Bill Gates climate memo
I wanted to offer my thoughts, as a climate scientist, on the widely discussed memo published by Bill Gates in late October 2025. While I actually do agree with some of the specific points made therein regarding the urgent global need to accelerate efforts to reduce global poverty and improve human
www.youtube.com
November 3, 2025 at 9:18 PM
I just recorded a short video--essentially an updated version of my social media threads--on the Bill Gates climate memo. Despite agreeing with some points therein, I still think its framing is fundamentally flawed and thus also its key conclusions.
Reposted by Daniel Swain
Earlier this week, @sammyroth.bsky.social talked about the #GatesMemo with climate scientists @kimcobb.bsky.social, @hausfath.bsky.social, @katharinehayhoe.com & @weatherwest.bsky.social. Watch the video here 👇
The Bill Gates Memo: Climate Scientists Respond with Urgency
Hear from Kim Cobb, Zeke Hausfather, Katharine Hayhoe and Daniel Swain.
coveringclimatenow.org
November 6, 2025 at 4:34 PM
Earlier this week, @sammyroth.bsky.social talked about the #GatesMemo with climate scientists @kimcobb.bsky.social, @hausfath.bsky.social, @katharinehayhoe.com & @weatherwest.bsky.social. Watch the video here 👇
Reposted by Daniel Swain
REMINDER: Tonight at 7pm PST, tune into a Distinctive Voices talk on weather whiplash. 🌪️ Climate scientist Daniel Swain (@weatherwest.bsky.social) will illuminate the impacts of dramatic swings between extreme weather such as droughts, floods & wildfires. Register: www.eventbrite.com/e/climate-ch...
November 5, 2025 at 6:12 PM
REMINDER: Tonight at 7pm PST, tune into a Distinctive Voices talk on weather whiplash. 🌪️ Climate scientist Daniel Swain (@weatherwest.bsky.social) will illuminate the impacts of dramatic swings between extreme weather such as droughts, floods & wildfires. Register: www.eventbrite.com/e/climate-ch...
Reposted by Daniel Swain
There are a lot of things I agree with in Bill Gates' new climate memo, but I think it sets up a false dichotomy between reducing emissions and helping the world's poorest. I've put together a piece with my thoughts over at TCB:
On the Gates climate memo
There is a lot of things I agree with in Bill Gates’ new memo on climate change, but I think it fundamentally sets up a false dichotomy.
www.theclimatebrink.com
November 5, 2025 at 5:25 PM
There are a lot of things I agree with in Bill Gates' new climate memo, but I think it sets up a false dichotomy between reducing emissions and helping the world's poorest. I've put together a piece with my thoughts over at TCB:
In case you missed our conversation on the Gates climate memo yesterday, the recording is now available!
www.youtube.com/watch?v=DUAX...
www.youtube.com/watch?v=DUAX...
November 5, 2025 at 3:02 PM
In case you missed our conversation on the Gates climate memo yesterday, the recording is now available!
www.youtube.com/watch?v=DUAX...
www.youtube.com/watch?v=DUAX...
Reposted by Daniel Swain
Join #UCANR climate scientist Daniel Swain @weatherwest.bsky.social on Nov 5, (7–8 PM) at the Arnold & Mabel Beckman Center in Irvine, CA for a Distinctive Voices talk on “Hydroclimate Whiplash” & the rising extremes of droughts, floods & wildfires. #CAwx
bit.ly/3JgHALi
bit.ly/3JgHALi
Distinctive Voices — Climate change through the lens of increasing hydroclimate whiplash – NAS
The past decade has brought episodes of exceptional and even historically unprecedented warmth, both in California and around the world. But perhaps even more disruptive than rising global average tem...
bit.ly
November 5, 2025 at 5:08 AM
Join #UCANR climate scientist Daniel Swain @weatherwest.bsky.social on Nov 5, (7–8 PM) at the Arnold & Mabel Beckman Center in Irvine, CA for a Distinctive Voices talk on “Hydroclimate Whiplash” & the rising extremes of droughts, floods & wildfires. #CAwx
bit.ly/3JgHALi
bit.ly/3JgHALi
Reposted by Daniel Swain
An atmospheric river takes aim at the west coast, driven by a large low-pressure system over the north Pacific Ocean.
November 4, 2025 at 6:44 PM
An atmospheric river takes aim at the west coast, driven by a large low-pressure system over the north Pacific Ocean.
Reposted by Daniel Swain
"Science is being destroyed across many agencies" say federal researchers.
For my latest @nature.com piece, I spoke to 19 different scientists across EPA, NOAA, NIH, NASA, and USGS to document how science is being dismantled across US federal agencies.
For my latest @nature.com piece, I spoke to 19 different scientists across EPA, NOAA, NIH, NASA, and USGS to document how science is being dismantled across US federal agencies.
Dismantling of US federal agencies will ‘destroy science’
From NASA to the National Institutes of Health, federal agencies conduct research that universities cannot. Agency scientists speak out about the irreplaceable facilities, institutional knowledge and ...
www.nature.com
November 4, 2025 at 2:58 PM
"Science is being destroyed across many agencies" say federal researchers.
For my latest @nature.com piece, I spoke to 19 different scientists across EPA, NOAA, NIH, NASA, and USGS to document how science is being dismantled across US federal agencies.
For my latest @nature.com piece, I spoke to 19 different scientists across EPA, NOAA, NIH, NASA, and USGS to document how science is being dismantled across US federal agencies.
Reposted by Daniel Swain
Read about the Gates memo in the news? Wondering what @kimcobb.bsky.social, @hausfath.bsky.social, @weatherwest.bsky.social, @sammyroth.bsky.social and I think about it?
No need to wonder: @coveringclimatenow.org is hosting a free webinar panel. Join us THIS AFTERNOON:
No need to wonder: @coveringclimatenow.org is hosting a free webinar panel. Join us THIS AFTERNOON:
The Bill Gates Memo: Climate Scientists Respond With Urgency — Covering Climate Now
Ahead of this month’s COP30 summit in Brazil, billionaire investor Bill Gates is advising world leaders that global warming “will not lead to humanity’s demise” and that effort to reducing emissions a...
coveringclimatenow.org
November 4, 2025 at 2:18 PM
Read about the Gates memo in the news? Wondering what @kimcobb.bsky.social, @hausfath.bsky.social, @weatherwest.bsky.social, @sammyroth.bsky.social and I think about it?
No need to wonder: @coveringclimatenow.org is hosting a free webinar panel. Join us THIS AFTERNOON:
No need to wonder: @coveringclimatenow.org is hosting a free webinar panel. Join us THIS AFTERNOON:
Reposted by Daniel Swain
Quick Weather West update today for sake of discussing fairly strong atmospheric river that will arrive in NorCal Tue-Wed, bringing widespread rain, gusty winds, and maybe isolated t-storms. Warm still, though, so Sierra rain vs snow, & dry in SoCal. #CAwx
After anomalous late Oct warmth, a sooner-than-expected shift back toward wetter conditions in (at least) NorCal - Weather West
A quick blog update amid shifting conditions I suspect that more than a few of us, at our busiest and most chaotic moments, have exclaimed to exasperated friends and colleagues that we "wished there were two of us to help share the load!" Well, in this present moment, I am not sure a single clone
weatherwest.com
November 3, 2025 at 11:58 PM
Quick Weather West update today for sake of discussing fairly strong atmospheric river that will arrive in NorCal Tue-Wed, bringing widespread rain, gusty winds, and maybe isolated t-storms. Warm still, though, so Sierra rain vs snow, & dry in SoCal. #CAwx
Quick Weather West update today for sake of discussing fairly strong atmospheric river that will arrive in NorCal Tue-Wed, bringing widespread rain, gusty winds, and maybe isolated t-storms. Warm still, though, so Sierra rain vs snow, & dry in SoCal. #CAwx
After anomalous late Oct warmth, a sooner-than-expected shift back toward wetter conditions in (at least) NorCal - Weather West
A quick blog update amid shifting conditions I suspect that more than a few of us, at our busiest and most chaotic moments, have exclaimed to exasperated friends and colleagues that we "wished there were two of us to help share the load!" Well, in this present moment, I am not sure a single clone
weatherwest.com
November 3, 2025 at 11:58 PM
Quick Weather West update today for sake of discussing fairly strong atmospheric river that will arrive in NorCal Tue-Wed, bringing widespread rain, gusty winds, and maybe isolated t-storms. Warm still, though, so Sierra rain vs snow, & dry in SoCal. #CAwx
Reposted by Daniel Swain
I keep seeing journalism described as an "ecosystem" and I guess that tracks because it's undergoing an extinction crisis caused by billionaires, too.
November 3, 2025 at 8:44 PM
I keep seeing journalism described as an "ecosystem" and I guess that tracks because it's undergoing an extinction crisis caused by billionaires, too.
I just recorded a short video--essentially an updated version of my social media threads--on the Bill Gates climate memo. Despite agreeing with some points therein, I still think its framing is fundamentally flawed and thus also its key conclusions.
Thoughts from a climate scientist on the Bill Gates climate memo
I wanted to offer my thoughts, as a climate scientist, on the widely discussed memo published by Bill Gates in late October 2025. While I actually do agree with some of the specific points made therein regarding the urgent global need to accelerate efforts to reduce global poverty and improve human
www.youtube.com
November 3, 2025 at 9:18 PM
I just recorded a short video--essentially an updated version of my social media threads--on the Bill Gates climate memo. Despite agreeing with some points therein, I still think its framing is fundamentally flawed and thus also its key conclusions.
Reposted by Daniel Swain
Confused or curious about the Bill Gates climate memo? I've got you covered! TOMORROW at 1:30pm PT, I'm talking with 4 great scientists. Sign up for an important convo w/ @katharinehayhoe.com @kimcobb.bsky.social @hausfath.bsky.social @weatherwest.bsky.social: coveringclimatenow.org/event/the-bi...
The Bill Gates Memo: Climate Scientists Respond With Urgency — Covering Climate Now
Ahead of this month’s COP30 summit in Brazil, billionaire investor Bill Gates is advising world leaders that global warming “will not lead to humanity’s demise” and that effort to reducing emissions a...
coveringclimatenow.org
November 3, 2025 at 7:37 PM
Confused or curious about the Bill Gates climate memo? I've got you covered! TOMORROW at 1:30pm PT, I'm talking with 4 great scientists. Sign up for an important convo w/ @katharinehayhoe.com @kimcobb.bsky.social @hausfath.bsky.social @weatherwest.bsky.social: coveringclimatenow.org/event/the-bi...
Reposted by Daniel Swain
The wet PacNW/dry SoCal precipitation "dipole" I mentioned last week will still be in effect, but its axis will be somewhat farther south. This means the SF and maybe even Monterey Bay areas could see some decent rain, with heavier stuff falling along North Coast/northern mtns. #CAwx [2/3]
November 1, 2025 at 12:55 PM
The wet PacNW/dry SoCal precipitation "dipole" I mentioned last week will still be in effect, but its axis will be somewhat farther south. This means the SF and maybe even Monterey Bay areas could see some decent rain, with heavier stuff falling along North Coast/northern mtns. #CAwx [2/3]