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
WxGeek Moment 🤓 Check this out... while some parts of the Bay Area and Central Coast are shivering in the 30s this morning, we have the complete opposite on the coast due to adiabatic warming (compression). Temperatures along #BigSur are curr... https://x.com/NWSBayArea/status/1998405032870379767
December 9, 2025 at 2:53 PM
WxGeek Moment 🤓 Check this out... while some parts of the Bay Area and Central Coast are shivering in the 30s this morning, we have the complete opposite on the coast due to adiabatic warming (compression). Temperatures along #BigSur are curr... https://x.com/NWSBayArea/status/1998405032870379767
Reposted by Daniel Swain
“This is, I think, one of the more dramatic scrubbings we’ve seen so far in the climate space,” said Daniel Swain @weatherwest.bsky.social, a climate scientist @ucanr.edu, reports @shannonosaka.bsky.social wapo.st/4pXFvDw
The EPA is wiping mention of human-caused climate change from its website
Some pages have been tweaked to emphasize ‘natural forces’; others have been deleted entirely.
wapo.st
December 9, 2025 at 5:47 PM
“This is, I think, one of the more dramatic scrubbings we’ve seen so far in the climate space,” said Daniel Swain @weatherwest.bsky.social, a climate scientist @ucanr.edu, reports @shannonosaka.bsky.social wapo.st/4pXFvDw
Reposted by Daniel Swain
A prolonged atmospheric river will continue impacting the Pacific Northwest with heavy rainfall. Widespread significant river flooding is underway and is expected to continue through much of the week.
It will be critical to monitor the forecasts now and through the next seven days at weather.gov.
It will be critical to monitor the forecasts now and through the next seven days at weather.gov.
December 9, 2025 at 3:32 PM
A prolonged atmospheric river will continue impacting the Pacific Northwest with heavy rainfall. Widespread significant river flooding is underway and is expected to continue through much of the week.
It will be critical to monitor the forecasts now and through the next seven days at weather.gov.
It will be critical to monitor the forecasts now and through the next seven days at weather.gov.
Reposted by Daniel Swain
I'll be offering a dual-purpose "rapid response" livestream today (1pm PT) focused on EPA's recent scrubbing of climate info from its website, & also the developing major flood event in Pacific Northwest stemming from very warm atmospheric river event(s).
Rapid response livestream: U.S. EPA scrubs climate information, plus major flood event in Pacific NW - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme #weather and ...
www.youtube.com
December 8, 2025 at 6:59 PM
I'll be offering a dual-purpose "rapid response" livestream today (1pm PT) focused on EPA's recent scrubbing of climate info from its website, & also the developing major flood event in Pacific Northwest stemming from very warm atmospheric river event(s).
Reposted by Daniel Swain
This is absolutely awful. This was one of the best resources for climate indicators data, and my go-to share for help answering public questions.
Luckily I captured some of them on my new U.S. climate page a few months ago: zacklabe.com/united-state...
Luckily I captured some of them on my new U.S. climate page a few months ago: zacklabe.com/united-state...
Additionally, it appears that all of EPA's previously extensive "indicators of climate change" pages have been scrubbed entirely. The pages no longer exist; there are numerous dead links on the current/live EPA site, and no indication they have been moved to a new URL.
December 8, 2025 at 7:59 PM
This is absolutely awful. This was one of the best resources for climate indicators data, and my go-to share for help answering public questions.
Luckily I captured some of them on my new U.S. climate page a few months ago: zacklabe.com/united-state...
Luckily I captured some of them on my new U.S. climate page a few months ago: zacklabe.com/united-state...
I'll be offering a dual-purpose "rapid response" livestream today (1pm PT) focused on EPA's recent scrubbing of climate info from its website, & also the developing major flood event in Pacific Northwest stemming from very warm atmospheric river event(s).
Rapid response livestream: U.S. EPA scrubs climate information, plus major flood event in Pacific NW - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme #weather and ...
www.youtube.com
December 8, 2025 at 6:59 PM
I'll be offering a dual-purpose "rapid response" livestream today (1pm PT) focused on EPA's recent scrubbing of climate info from its website, & also the developing major flood event in Pacific Northwest stemming from very warm atmospheric river event(s).
It appears that the U.S. Environmental Protection Agency (EPA) has, within the past week, scrubbed a large amount of climate change content from its official website, as well as *removed human-caused warming* from the discussion on its "causes of climate change" page.
December 8, 2025 at 5:50 PM
It appears that the U.S. Environmental Protection Agency (EPA) has, within the past week, scrubbed a large amount of climate change content from its official website, as well as *removed human-caused warming* from the discussion on its "causes of climate change" page.
Reposted by Daniel Swain
Considerable flooding is possible across portions of the Pacific Northwest next week. Keep up to date with the latest forecast at weather.gov.
December 5, 2025 at 11:11 PM
Considerable flooding is possible across portions of the Pacific Northwest next week. Keep up to date with the latest forecast at weather.gov.
Reposted by Daniel Swain
Heavy rain is expected to begin across the Pacific Northwest tomorrow and linger through the week. Rainfall amounts up to 10" are possible within the Olympics, Cascades, and coastal ranges. 🌧️
Check conditions before traveling and never drive across a flooded roadway.
weather.gov
Check conditions before traveling and never drive across a flooded roadway.
weather.gov
December 7, 2025 at 3:20 PM
Heavy rain is expected to begin across the Pacific Northwest tomorrow and linger through the week. Rainfall amounts up to 10" are possible within the Olympics, Cascades, and coastal ranges. 🌧️
Check conditions before traveling and never drive across a flooded roadway.
weather.gov
Check conditions before traveling and never drive across a flooded roadway.
weather.gov
Reposted by Daniel Swain
New post: Under resilient ridge, prolonged tule fog episode brings cold & damp weather to Central Valley but anomalously warm/dry weather elsewhere. Plus, update on what turned out to be record-wet autumn in some spots & PacNW flood risk this wk. elsewhere.
Under a resilient ridge, prolonged tule fog episode brings cold and damp weather to the Central Valley but anomalously warm/dry weather elsewhere - Weather West
An increasingly resilient ridge keeps California dry, but with markedly different daily weather in dense tule fog vs non-fog zones, following a very wet and relatively warm autumn Well, the final numbers are now in and they reflect what everyone has been talking about in Southern California: it genuinely was historically wet this fall in
weatherwest.com
December 6, 2025 at 11:46 PM
New post: Under resilient ridge, prolonged tule fog episode brings cold & damp weather to Central Valley but anomalously warm/dry weather elsewhere. Plus, update on what turned out to be record-wet autumn in some spots & PacNW flood risk this wk. elsewhere.
New post: Under resilient ridge, prolonged tule fog episode brings cold & damp weather to Central Valley but anomalously warm/dry weather elsewhere. Plus, update on what turned out to be record-wet autumn in some spots & PacNW flood risk this wk. elsewhere.
Under a resilient ridge, prolonged tule fog episode brings cold and damp weather to the Central Valley but anomalously warm/dry weather elsewhere - Weather West
An increasingly resilient ridge keeps California dry, but with markedly different daily weather in dense tule fog vs non-fog zones, following a very wet and relatively warm autumn Well, the final numbers are now in and they reflect what everyone has been talking about in Southern California: it genuinely was historically wet this fall in
weatherwest.com
December 6, 2025 at 11:46 PM
New post: Under resilient ridge, prolonged tule fog episode brings cold & damp weather to Central Valley but anomalously warm/dry weather elsewhere. Plus, update on what turned out to be record-wet autumn in some spots & PacNW flood risk this wk. elsewhere.
Reposted by Daniel Swain
Join us on Wed, Dec 10 (10am Eastern/7am Pacific) for a live conversation on the science behind and implications of more rapidly intensifying hurricanes. This discussion will feature @stevebowen.bsky.social (Gallagher Re) and me, and is hosted by Reask. See you then!
Hurricane intensification: a changing reality | Reask
Join climate expert Dr. Daniel Swain and Gallagher Re’s Steve Bowen for a deep dive into hurricane intensification, modelling approaches, and (re)insurance risk.
reask.earth
December 4, 2025 at 9:26 PM
Join us on Wed, Dec 10 (10am Eastern/7am Pacific) for a live conversation on the science behind and implications of more rapidly intensifying hurricanes. This discussion will feature @stevebowen.bsky.social (Gallagher Re) and me, and is hosted by Reask. See you then!
Reposted by Daniel Swain
This evening's virtual office hour turned into a full 90 minute session on recent global climate trends! If you want to hear more about my thoughts on where we are & where we're headed, including context re: record-breaking global warmth, check it out:
Global climate update: Recent trends, what surprises may lurk, and honest thoughts on our trajectory
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme #weather and #climate. 12/04/2025 topic: I'll offer an update on recent short- and long-term global climate trends, including the likely upcoming transition
youtu.be
December 5, 2025 at 1:20 AM
This evening's virtual office hour turned into a full 90 minute session on recent global climate trends! If you want to hear more about my thoughts on where we are & where we're headed, including context re: record-breaking global warmth, check it out:
Reposted by Daniel Swain
After today’s AR dissipates over the Pacific Northwest, a stronger AR is forecast to move onshore Mon 8 Dec and remain over the region until early Thu 11 Dec. This long-duration AR is expected to result in multiple days of heavy rainfall leading to significant streamflow impacts over the region.
December 5, 2025 at 8:52 PM
After today’s AR dissipates over the Pacific Northwest, a stronger AR is forecast to move onshore Mon 8 Dec and remain over the region until early Thu 11 Dec. This long-duration AR is expected to result in multiple days of heavy rainfall leading to significant streamflow impacts over the region.
I've started clipping various short segments from some of my live and interactive virtual "weather and climate office hour" sessions. While I always record and publish the full conversations uncut, they can be a bit lengthy. :) Here's the first batch!
Clips from Daniel Swain's live virtual "weather and climate office hours"
Short clips drawn from Daniel Swain's live, virtual, and interactive "weather and climate office hours" on the Weather West channel.
www.youtube.com
December 5, 2025 at 11:05 PM
I've started clipping various short segments from some of my live and interactive virtual "weather and climate office hour" sessions. While I always record and publish the full conversations uncut, they can be a bit lengthy. :) Here's the first batch!
This evening's virtual office hour turned into a full 90 minute session on recent global climate trends! If you want to hear more about my thoughts on where we are & where we're headed, including context re: record-breaking global warmth, check it out:
Global climate update: Recent trends, what surprises may lurk, and honest thoughts on our trajectory
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme #weather and #climate. 12/04/2025 topic: I'll offer an update on recent short- and long-term global climate trends, including the likely upcoming transition
youtu.be
December 5, 2025 at 1:20 AM
This evening's virtual office hour turned into a full 90 minute session on recent global climate trends! If you want to hear more about my thoughts on where we are & where we're headed, including context re: record-breaking global warmth, check it out:
Join us on Wed, Dec 10 (10am Eastern/7am Pacific) for a live conversation on the science behind and implications of more rapidly intensifying hurricanes. This discussion will feature @stevebowen.bsky.social (Gallagher Re) and me, and is hosted by Reask. See you then!
Hurricane intensification: a changing reality | Reask
Join climate expert Dr. Daniel Swain and Gallagher Re’s Steve Bowen for a deep dive into hurricane intensification, modelling approaches, and (re)insurance risk.
reask.earth
December 4, 2025 at 9:26 PM
Join us on Wed, Dec 10 (10am Eastern/7am Pacific) for a live conversation on the science behind and implications of more rapidly intensifying hurricanes. This discussion will feature @stevebowen.bsky.social (Gallagher Re) and me, and is hosted by Reask. See you then!
See you at 2pm PT today!
Then, on Thu, Dec 4 @ 2pm PT, I'll offer a global #climate update. I'll discuss the likely upcoming transition from La Niña to El Niño conditions, recent global temperature trends, impacts, & implications. I'll also be taking questions live! #CAwx [2/2]
Global climate update Dec. 2025: Recent trends in greenhouse gases, global temperatures, and more - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme #weather and ...
www.youtube.com
December 4, 2025 at 8:48 PM
See you at 2pm PT today!
This lengthy discussion of tule fog--including its origins, long-term trends, and impacts--was recorded (as always!) and is now available at same link below. Next up, on Thu at 2pm PT, is a broader global climate update. See you then!
I'll be hosting *two* separate livestreams this week, each w/different focus. First, join me on Tue, Dec 2 @ 4pm PT for a CA weather update. I'll discuss the recent tule fog/stratus episode & what appears to be a pretty long dry spell into Dec. #CAwx [1/2]
California weather update: Tule fog, a December dry spell, and an overview of our topsy-turvy autumn - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme #weather and ...
www.youtube.com
December 3, 2025 at 5:42 PM
This lengthy discussion of tule fog--including its origins, long-term trends, and impacts--was recorded (as always!) and is now available at same link below. Next up, on Thu at 2pm PT, is a broader global climate update. See you then!
Reposted by Daniel Swain
UC ANR helps Californians in all corners of the state adapt to climate change--and it's a team I'm personally proud to be part of. For #GivingTuesday, if you can, give to support this work: give.ucanr.edu
December 2, 2025 at 5:22 PM
UC ANR helps Californians in all corners of the state adapt to climate change--and it's a team I'm personally proud to be part of. For #GivingTuesday, if you can, give to support this work: give.ucanr.edu
Today at 4pm Pacific Time!
I'll be hosting *two* separate livestreams this week, each w/different focus. First, join me on Tue, Dec 2 @ 4pm PT for a CA weather update. I'll discuss the recent tule fog/stratus episode & what appears to be a pretty long dry spell into Dec. #CAwx [1/2]
California weather update: Tule fog, a December dry spell, and an overview of our topsy-turvy autumn - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme #weather and ...
www.youtube.com
December 2, 2025 at 8:07 PM
Today at 4pm Pacific Time!
UC ANR helps Californians in all corners of the state adapt to climate change--and it's a team I'm personally proud to be part of. For #GivingTuesday, if you can, give to support this work: give.ucanr.edu
December 2, 2025 at 5:22 PM
UC ANR helps Californians in all corners of the state adapt to climate change--and it's a team I'm personally proud to be part of. For #GivingTuesday, if you can, give to support this work: give.ucanr.edu
Reposted by Daniel Swain
Then, on Thu, Dec 4 @ 2pm PT, I'll offer a global #climate update. I'll discuss the likely upcoming transition from La Niña to El Niño conditions, recent global temperature trends, impacts, & implications. I'll also be taking questions live! #CAwx [2/2]
Global climate update Dec. 2025: Recent trends in greenhouse gases, global temperatures, and more - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme #weather and ...
www.youtube.com
December 1, 2025 at 11:05 PM
Reposted by Daniel Swain
I'll be hosting *two* separate livestreams this week, each w/different focus. First, join me on Tue, Dec 2 @ 4pm PT for a CA weather update. I'll discuss the recent tule fog/stratus episode & what appears to be a pretty long dry spell into Dec. #CAwx [1/2]
California weather update: Tule fog, a December dry spell, and an overview of our topsy-turvy autumn - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme #weather and ...
www.youtube.com
December 1, 2025 at 11:05 PM
I'll be hosting *two* separate livestreams this week, each w/different focus. First, join me on Tue, Dec 2 @ 4pm PT for a CA weather update. I'll discuss the recent tule fog/stratus episode & what appears to be a pretty long dry spell into Dec. #CAwx [1/2]
I'll be hosting *two* separate livestreams this week, each w/different focus. First, join me on Tue, Dec 2 @ 4pm PT for a CA weather update. I'll discuss the recent tule fog/stratus episode & what appears to be a pretty long dry spell into Dec. #CAwx [1/2]
California weather update: Tule fog, a December dry spell, and an overview of our topsy-turvy autumn - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme #weather and ...
www.youtube.com
December 1, 2025 at 11:05 PM
I'll be hosting *two* separate livestreams this week, each w/different focus. First, join me on Tue, Dec 2 @ 4pm PT for a CA weather update. I'll discuss the recent tule fog/stratus episode & what appears to be a pretty long dry spell into Dec. #CAwx [1/2]