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weatherwest.bsky.social
Daniel Swain
@weatherwest.bsky.social
42K followers 2.5K following 2.1K posts
Climate scientist-communicator focused on extreme events like floods, droughts, & wildfires on a warming planet. www.weatherwest.com
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 9h
New blog post out just before my 3pm PT YouTube livestream! Hurricane Priscilla moisture to bring big rain event to AZ/SE CA later this week, but significant NorCal rain event also possible next week (blame recurving West Pacific typhoon!). #CAwx #CAfire
Hurricane Priscilla remnants to bring widespread Southwest rain/thunderstorms (including far SoCal); more widespread precipitation possible with colder NorCal system by mid-Oct - Weather West
An very mild September across CA, but humidity & some unusual rainfall kept fire risk low September 2025 was yet another "strange" weather month along the Pacific Coast. In California, multiple episodes of precipitation (and a fair bit of thunderstorm activity) brought wetter conditions to much of the state--particularly across central and southern California. Serious,
weatherwest.com
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 1d
I'll host a livestream on Wed, Oct 8 @ 3pm PT to discuss the likely impacts of weakening #HurricanePriscilla on U.S. Southwest (including southern CA), including who may see some thunderstorms. I'll also a new weather & climate-related federal update...
Weather & climate office hour 10/08/25: Hurricane Priscilla's effects on Southwest & federal update - 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
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 1d
Thunderstorms are potentially possible w/both SoCal remnant moisture & NorCal low (lower odds). These will probably be "wet" storms in all cases, w/little fire risk. Offshore waters remain anomalously warm, which will "juice things up" a bit as well. [3/3] #CAwx #CAfire
NOAA Coral Reef Watch map depicting current ocean surface temperature (SST) anomalies near California. The are almost uniformly positive (warmer than average), as depicted by warm yellow/orange/red colors.
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 1d
While there is still some uncertainty, it now appears that Priscilla's remnant circulation will miss CA to SE but will still bring showers/t-storms to parts of SoCal, esp. south of LA County. Separately, NorCal may see a few showers directly from offshore low. [2/3] #CAwx #CAfire
Map from ECMWF ensemble depicting precipitation over the next 5 days across the American West. Light precipitation is depicted over much of NorCal, mainly north of the SF Bay Area, and light to moderate precipitation is also indicated over far SoCal (mainly south of Los Angeles).
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 1d
After another fairly hot and dry spell across California, cooler and more active weather will once again return later this week as remnant moisture from then-former #HurricanePriscilla interacts with an offshore low pressure system. [1/3] #CAwx #CAfire
Map plot snapshot from ECMWF model depicting the offshore low (NorCal) and the weakening Hurricane Priscilla (west of Baja CA). The field plotted is mid-level moisture (blues represent moister air) and mid-level winds.
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 1d
I'll host a livestream on Wed, Oct 8 @ 3pm PT to discuss the likely impacts of weakening #HurricanePriscilla on U.S. Southwest (including southern CA), including who may see some thunderstorms. I'll also a new weather & climate-related federal update...
Weather & climate office hour 10/08/25: Hurricane Priscilla's effects on Southwest & federal update - 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
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 1d
Thunderstorms are potentially possible w/both SoCal remnant moisture & NorCal low (lower odds). These will probably be "wet" storms in all cases, w/little fire risk. Offshore waters remain anomalously warm, which will "juice things up" a bit as well. [3/3] #CAwx #CAfire
NOAA Coral Reef Watch map depicting current ocean surface temperature (SST) anomalies near California. The are almost uniformly positive (warmer than average), as depicted by warm yellow/orange/red colors.
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 1d
While there is still some uncertainty, it now appears that Priscilla's remnant circulation will miss CA to SE but will still bring showers/t-storms to parts of SoCal, esp. south of LA County. Separately, NorCal may see a few showers directly from offshore low. [2/3] #CAwx #CAfire
Map from ECMWF ensemble depicting precipitation over the next 5 days across the American West. Light precipitation is depicted over much of NorCal, mainly north of the SF Bay Area, and light to moderate precipitation is also indicated over far SoCal (mainly south of Los Angeles).
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 1d
After another fairly hot and dry spell across California, cooler and more active weather will once again return later this week as remnant moisture from then-former #HurricanePriscilla interacts with an offshore low pressure system. [1/3] #CAwx #CAfire
Map plot snapshot from ECMWF model depicting the offshore low (NorCal) and the weakening Hurricane Priscilla (west of Baja CA). The field plotted is mid-level moisture (blues represent moister air) and mid-level winds.
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 2d
Yeah.
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 8d
It's truly an honor to be on the 2025 Time Magazine #TIME100Next list! I took a moment to reflect on what this recognition means to me personally & also on importance of offering nuanced context in a moment of widespread misinformation & societal upheaval.
Climate Scientist Daniel Swain reflects on "TIME100 Next" recognition
It's truly an honor to be on the 2025 Time Magazine #TIME100Next list! I wanted to take a moment to briefly reflect on what the recognition means to me personally, and also on the broader importance of supporting those who are doing their very best to provide constructive context surrounding global
www.youtube.com
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 8d
Alas.
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ucanr.edu
UC Agriculture & Natural Resources @ucanr.edu · 8d
🎉 UC ANR’s Daniel Swain @weatherwest.bsky.social joins the 2025 #TIME100Next, spotlighting 100 rising leaders worldwide. A climate scientist & communicator, Swain studies droughts, floods & wildfires—& makes complex science accessible to the public & policymakers.
More here: bit.ly/4nXePlk
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 8d
It's truly an honor to be on the 2025 Time Magazine #TIME100Next list! I took a moment to reflect on what this recognition means to me personally & also on importance of offering nuanced context in a moment of widespread misinformation & societal upheaval.
Climate Scientist Daniel Swain reflects on "TIME100 Next" recognition
It's truly an honor to be on the 2025 Time Magazine #TIME100Next list! I wanted to take a moment to briefly reflect on what the recognition means to me personally, and also on the broader importance of supporting those who are doing their very best to provide constructive context surrounding global
www.youtube.com
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zacklabe.com
Zack Labe @zacklabe.com · 10d
"After nearly 40 years, the Arctic Research Consortium of the United States, or ARCUS, will close September 30."

"The Arctic Research Consortium of the United States funded programs that aided Indigenous communities and tracked melting sea ice, among dozens of initiatives."
After Trump cut the National Science Foundation by 56 percent, a venerable Arctic research center closes its doors
The Arctic Research Consortium of the United States funded programs that aided Indigenous communities and tracked melting sea ice, among dozens of initiatives.
grist.org
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 14d
#Climate change is increasing the likelihood and severity of extreme #weather types that already occur--bringing about a more intense variation on a familiar theme. But it is also expanding the range of what's possible in new locations around the world...
#ClimateChange is increasing familiar #weather extremes, but also expanding range of what's possible
As the climate warms, one of the most obvious effects is an increase in the types of weather and weather-related extremes with which we're already familiar in a given place or context. But as warming continues, the shifting climate also brings about the possibility of certain types of extremes--like
www.youtube.com
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 14d
As we approach 1.5°C of #GlobalWarming, we've already begun to experience historically unprecedented heatwaves, downpours, & other types of disruptive, destructive, & deadly extreme events--and there will be more to come on a path toward continued warming.
#ClimateChange is already "unearthing" historically unprecedented extreme events, with more to come
As the planet approaches 1.5°C (2.7°F) of #GlobalWarming, we've already begun to experience historically unprecedented heatwaves, downpours, and other types of disruptive, destructive, and deadly extreme weather events. While extreme weather has certainly occurred in the past, modern civilization is
youtu.be
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 11d
W/likely persistence of highly anomalously warm nearshore & offshore ocean surface temperatures in NE Pacific for at least another couple of weeks, days & esp nights will continue to be mild in places w/coastal influence & any inbound storms may have more moisture vs usual. #CAwx
Map from NOAA Coral Reef Watch depicting sea surface temperatures across the NE Pacific Ocean. Along the CA coast and far to the west, they are depicted as being far warmer than average.
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 11d
This, in combination w/recent rainfall, will tamp down still-active PacNW wildfires & also further mitigate NorCal fire season. In some, but not all, places in far NorCal and PacNW, this will probably be "fire season-ending." Little/no rain expected south of SF Bay. #CAwx #CAfire
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 11d
A substantial autumn pattern shift will unfold this week, especially across the Pacific Northwest and northern CA. Multiple episodes of light to locally moderate rainfall and cooler temperatures, associated with modest fronts, will occur over the next 10 days. [1/2] #CAwx #CAfire
Map depicting predicted precipitation from ECMWF ensemble over next 10 days. It shows moderate precipitation accumulation over most of the PacNW and northern CA, with light precipitation southward to near the SF Bay region. GFS ensemble prediction of surface temperature anomalies over the next 5 days. They will be slightly cooler than average across most of California, though warmer than average along the immediate coast and offshore as well as across the interior West.
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 11d
W/likely persistence of highly anomalously warm nearshore & offshore ocean surface temperatures in NE Pacific for at least another couple of weeks, days & esp nights will continue to be mild in places w/coastal influence & any inbound storms may have more moisture vs usual. #CAwx
Map from NOAA Coral Reef Watch depicting sea surface temperatures across the NE Pacific Ocean. Along the CA coast and far to the west, they are depicted as being far warmer than average.
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 11d
This, in combination w/recent rainfall, will tamp down still-active PacNW wildfires & also further mitigate NorCal fire season. In some, but not all, places in far NorCal and PacNW, this will probably be "fire season-ending." Little/no rain expected south of SF Bay. #CAwx #CAfire
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 11d
A substantial autumn pattern shift will unfold this week, especially across the Pacific Northwest and northern CA. Multiple episodes of light to locally moderate rainfall and cooler temperatures, associated with modest fronts, will occur over the next 10 days. [1/2] #CAwx #CAfire
Map depicting predicted precipitation from ECMWF ensemble over next 10 days. It shows moderate precipitation accumulation over most of the PacNW and northern CA, with light precipitation southward to near the SF Bay region. GFS ensemble prediction of surface temperature anomalies over the next 5 days. They will be slightly cooler than average across most of California, though warmer than average along the immediate coast and offshore as well as across the interior West.
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 12d
Hi Marthine,
You might be interested in my last YouTube livestream (recorded, as always, and now available) in which I take a deep dive into the recent (quite) unusual recent combination of humid, hot, humid, and even rainy/stormy conditions in California. youtu.be/tO-o9zEVeDk
Weather & climate office hour 9/23/2025: Another burst of humid heat and then thunderstorms in CA!
YouTube video by Weather West
youtu.be
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weatherwest.bsky.social
Daniel Swain @weatherwest.bsky.social · 14d
The full documentary Climate Extremes: Extreme Weather is now out on YouTube:
Climate Extremes: Extreme Weather (Full Documentary)
Share Climate Extremes with your friends and followers! Learn about extreme weather, climate adaptation, and planetary behavior from leading global scientists! Click the "share" button above for sharing options! Subtitles include: English, French, Italian, German, Spanish, Portuguese, Turkis
www.youtube.com
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