Will Cowan
@floodmeridians.bsky.social
There are many maps of one place and many histories of one time.
-J. Frederikse
Uchinaanchu Angeleño 與儀
-J. Frederikse
Uchinaanchu Angeleño 與儀
Reposted by Will Cowan
Yet another rainy (at basin-scales) AR storm headed our way. Its been a real winter for them so far.
Check out whats forecast, in this regard, for your locale at
cw3e.ucsd.edu/DSMaps/DS_fr...
Check out whats forecast, in this regard, for your locale at
cw3e.ucsd.edu/DSMaps/DS_fr...
December 15, 2025 at 7:48 PM
Yet another rainy (at basin-scales) AR storm headed our way. Its been a real winter for them so far.
Check out whats forecast, in this regard, for your locale at
cw3e.ucsd.edu/DSMaps/DS_fr...
Check out whats forecast, in this regard, for your locale at
cw3e.ucsd.edu/DSMaps/DS_fr...
Reposted by Will Cowan
Yeah, THAT is a strong and classic “Pineapple Express” atmospheric river configuration!
www.sfchronicle.com/weather-fore...
www.sfchronicle.com/weather-fore...
Storm forecast shows Pineapple Express may head straight for Bay Area
The Bay Area could be in the path of an atmospheric river this weekend, with forecast models trending toward a wetter, multiday storm.
www.sfchronicle.com
December 17, 2025 at 3:34 PM
Yeah, THAT is a strong and classic “Pineapple Express” atmospheric river configuration!
www.sfchronicle.com/weather-fore...
www.sfchronicle.com/weather-fore...
Reposted by Will Cowan
An #AtmosphericRiver is forecast to move over the Pacific Northwest on Thu., bringing additional rainfall to WA, OR, and Northern CA as it shifts down the coast thru Fri. A second AR will follow behind on Sat. with additional impacts forecast over Northern CA thru Mon. Read more: go.ucsd.edu/451WXPa
December 17, 2025 at 11:20 PM
An #AtmosphericRiver is forecast to move over the Pacific Northwest on Thu., bringing additional rainfall to WA, OR, and Northern CA as it shifts down the coast thru Fri. A second AR will follow behind on Sat. with additional impacts forecast over Northern CA thru Mon. Read more: go.ucsd.edu/451WXPa
Reposted by Will Cowan
CW3E AR Update: AR activity is forecast to continue over the PNW thru early Wed., with a 2nd AR forecast to move onshore late on Wed. over the PNW and N. CA, through Fri. Models are also highlighting the potential for AR activity over CA next week. Read more here: cw3e.ucsd.edu/cw3e-ar-upda...
December 15, 2025 at 10:42 PM
CW3E AR Update: AR activity is forecast to continue over the PNW thru early Wed., with a 2nd AR forecast to move onshore late on Wed. over the PNW and N. CA, through Fri. Models are also highlighting the potential for AR activity over CA next week. Read more here: cw3e.ucsd.edu/cw3e-ar-upda...
Reposted by Will Cowan
The atmospheric river (AR) presently impacting the Pacific Northwest will continue to produce very heavy precipitation in western Washington today into early tomorrow, leading to potentially historic riverine flooding.
Read more here: cw3e.ucsd.edu/wp-content/u...
Read more here: cw3e.ucsd.edu/wp-content/u...
December 10, 2025 at 6:24 PM
The atmospheric river (AR) presently impacting the Pacific Northwest will continue to produce very heavy precipitation in western Washington today into early tomorrow, leading to potentially historic riverine flooding.
Read more here: cw3e.ucsd.edu/wp-content/u...
Read more here: cw3e.ucsd.edu/wp-content/u...
Reposted by Will Cowan
🌧️ How do we study #AtmosphericRivers? 🛫 By flying planes into them, obviously! @cw3escripps.bsky.social's Alex Tardy caught up with Fox Weather to share why flights are critical for understanding ARs ahead of a powerful atmospheric river headed for the Northwest. U.S. ⬇️
Powerful atmospheric river headed for the Northwest U.S. | Latest Weather Clips | FOX Weather
Project Policy Analyst and Meteorologist with the Center for Western Weather and Water Extremes at UC San Diego’s Scripps Institution of Oceanography, Alex Tar
www.foxweather.com
December 11, 2025 at 12:23 AM
🌧️ How do we study #AtmosphericRivers? 🛫 By flying planes into them, obviously! @cw3escripps.bsky.social's Alex Tardy caught up with Fox Weather to share why flights are critical for understanding ARs ahead of a powerful atmospheric river headed for the Northwest. U.S. ⬇️
Reposted by Will Cowan
CW3E Publication Notice: "Insights from a 25-year Database of Post-Fire Debris Flows in California" published in the International Journal of Wildland Fire with collaborators @cageosurvey.bsky.social Read more about this research here: cw3e.ucsd.edu/cw3e-publica...
December 11, 2025 at 3:54 AM
CW3E Publication Notice: "Insights from a 25-year Database of Post-Fire Debris Flows in California" published in the International Journal of Wildland Fire with collaborators @cageosurvey.bsky.social Read more about this research here: cw3e.ucsd.edu/cw3e-publica...
Reposted by Will Cowan
New @cw3escripps study presents a comprehensive 2000–2024 database of California postfire debris flows, and analyzes their spatial distribution, seasonal timing, atmospheric drivers, & variability.
cw3e.ucsd.edu/cw3e-publica...
cw3e.ucsd.edu/cw3e-publica...
December 11, 2025 at 7:10 PM
New @cw3escripps study presents a comprehensive 2000–2024 database of California postfire debris flows, and analyzes their spatial distribution, seasonal timing, atmospheric drivers, & variability.
cw3e.ucsd.edu/cw3e-publica...
cw3e.ucsd.edu/cw3e-publica...
Reposted by Will Cowan
We're excited to co-host, along with our partners @thehuntington.bsky.social, a special event with Dr. Naomi Fraga.
December 12, 2025, 2:00 – 3:00pm
Zoom Passcode: 041228. (No Pre-Registration Needed!)
Dr. Naomi Fraga is Director of Conservation Programs at California Botanic Garden in Claremont
December 12, 2025, 2:00 – 3:00pm
Zoom Passcode: 041228. (No Pre-Registration Needed!)
Dr. Naomi Fraga is Director of Conservation Programs at California Botanic Garden in Claremont
December 4, 2025 at 11:18 PM
We're excited to co-host, along with our partners @thehuntington.bsky.social, a special event with Dr. Naomi Fraga.
December 12, 2025, 2:00 – 3:00pm
Zoom Passcode: 041228. (No Pre-Registration Needed!)
Dr. Naomi Fraga is Director of Conservation Programs at California Botanic Garden in Claremont
December 12, 2025, 2:00 – 3:00pm
Zoom Passcode: 041228. (No Pre-Registration Needed!)
Dr. Naomi Fraga is Director of Conservation Programs at California Botanic Garden in Claremont
Reposted by Will Cowan
Note: Epically long ARs are hard to set up unless it’s over uninterrupted ocean surfaces, and the Pacific offers the longest open spaces for that. The topography and heterogeneity of continental surfaces tend to intercept ARs and/or rip them apart before their extents can grow this large. 2/2
December 8, 2025 at 3:07 PM
Note: Epically long ARs are hard to set up unless it’s over uninterrupted ocean surfaces, and the Pacific offers the longest open spaces for that. The topography and heterogeneity of continental surfaces tend to intercept ARs and/or rip them apart before their extents can grow this large. 2/2
Reposted by Will Cowan
A category 5-ish atmospheric river (based on intensity & duration of moisture delivery over the PNW) is setting up over the entire width of the North Pacific this week. Forecasted to be ~3x longer than avg ARs. 1/2
www.washingtonpost.com/weather/2025...
www.washingtonpost.com/weather/2025...
A 7,000-mile atmospheric river is stretching from Philippines to the U.S.
The unusually long atmospheric river is forecast to bring heavy rain and high winds to Washington, Oregon, Idaho, Montana and British Columbia starting Monday.
www.washingtonpost.com
December 8, 2025 at 3:07 PM
A category 5-ish atmospheric river (based on intensity & duration of moisture delivery over the PNW) is setting up over the entire width of the North Pacific this week. Forecasted to be ~3x longer than avg ARs. 1/2
www.washingtonpost.com/weather/2025...
www.washingtonpost.com/weather/2025...
Reposted by Will Cowan
A strong and long-duration #AtmosphericRiver, potentially ranking as an AR 5 in coastal Washington, will produce heavy rainfall and flooding in the Pacific Northwest this week. #WAwx #ORwx
See our latest AR Outlook for more information: cw3e.ucsd.edu/cw3e-ar-upda....
See our latest AR Outlook for more information: cw3e.ucsd.edu/cw3e-ar-upda....
December 8, 2025 at 10:29 PM
A strong and long-duration #AtmosphericRiver, potentially ranking as an AR 5 in coastal Washington, will produce heavy rainfall and flooding in the Pacific Northwest this week. #WAwx #ORwx
See our latest AR Outlook for more information: cw3e.ucsd.edu/cw3e-ar-upda....
See our latest AR Outlook for more information: cw3e.ucsd.edu/cw3e-ar-upda....
Reposted by Will Cowan
We posted a quick summary of the #AtmosphericRiver the brought precipitation to the Pacific Northwest on Dec 3-6 ahead of the system presently impacting the region. Read more here: cw3e.ucsd.edu/wp-content/u...
December 9, 2025 at 10:06 PM
We posted a quick summary of the #AtmosphericRiver the brought precipitation to the Pacific Northwest on Dec 3-6 ahead of the system presently impacting the region. Read more here: cw3e.ucsd.edu/wp-content/u...
Reposted by Will Cowan
The story is based on an oral history with Aiko Tengan Tokunaga, who offers one interpretation of a complex period of historical violence in which US and Japanese militarism, and centuries of Japanese colonialism, intersect to oppress, subjugate, and destroy Okinawan and Ryukyuan communities.
November 22, 2025 at 12:53 AM
The story is based on an oral history with Aiko Tengan Tokunaga, who offers one interpretation of a complex period of historical violence in which US and Japanese militarism, and centuries of Japanese colonialism, intersect to oppress, subjugate, and destroy Okinawan and Ryukyuan communities.
Reposted by Will Cowan
Another day, another solid overcast throughout nearly entirety of CA's Central Valley. However, as some have noted, as this event has persisted the density of actual fog has been diminished near the surface because temps actually aren't cold enough! "Tule stratus," perhaps? #CAwx
November 30, 2025 at 10:28 PM
Another day, another solid overcast throughout nearly entirety of CA's Central Valley. However, as some have noted, as this event has persisted the density of actual fog has been diminished near the surface because temps actually aren't cold enough! "Tule stratus," perhaps? #CAwx
Reposted by Will Cowan
Read the full piece, which is free and accessible to the public. Visit the PHR at: online.ucpress.edu/phr/article/...
“No Chinese Should Obey It”A Transpacific History of the Geary Act
In 1892, the Geary Act dramatically expanded Chinese exclusion by requiring all Chinese immigrants in the United States to register, under threat of deportation. Despite the tremendous attention the a...
online.ucpress.edu
November 18, 2025 at 5:49 PM
Read the full piece, which is free and accessible to the public. Visit the PHR at: online.ucpress.edu/phr/article/...
Reposted by Will Cowan
Together with white allies and Chinese across the Pacific, Chinese denizens of the United States formed one of the largest civil disobedience movements of their century. At stake was the future of exclusion and the avenues of belonging for Chinese in America.
November 18, 2025 at 5:49 PM
Together with white allies and Chinese across the Pacific, Chinese denizens of the United States formed one of the largest civil disobedience movements of their century. At stake was the future of exclusion and the avenues of belonging for Chinese in America.
Reposted by Will Cowan
In 1892, the Geary Act dramatically expanded Chinese exclusion by requiring all Chinese immigrants in the United States to register, under threat of deportation. This article unearths the transpacific networks of people and ideas that are revealed by, and mobilized against, the Geary Act.
November 18, 2025 at 5:49 PM
In 1892, the Geary Act dramatically expanded Chinese exclusion by requiring all Chinese immigrants in the United States to register, under threat of deportation. This article unearths the transpacific networks of people and ideas that are revealed by, and mobilized against, the Geary Act.
Reposted by Will Cowan
A trio of #AtmosphericRivers are forecast to make landfall over the Pacific Northwest in the next week, leading to heavy precipitation, snowfall at high elevations and stream rises and potential flooding.
Check out the latest outlook discussing the sequence of events: cw3e.ucsd.edu/cw3e-ar-upda...
Check out the latest outlook discussing the sequence of events: cw3e.ucsd.edu/cw3e-ar-upda...
December 3, 2025 at 10:08 PM
A trio of #AtmosphericRivers are forecast to make landfall over the Pacific Northwest in the next week, leading to heavy precipitation, snowfall at high elevations and stream rises and potential flooding.
Check out the latest outlook discussing the sequence of events: cw3e.ucsd.edu/cw3e-ar-upda...
Check out the latest outlook discussing the sequence of events: cw3e.ucsd.edu/cw3e-ar-upda...
Reposted by Will Cowan
🧵 New, noteworthy, and open-access Western scholarship!
Our partners at Pacific Historical Review @ucpress have made a piece from their new issue open to our readers and the public: “’No Chinese Should Obey It’: A Transpacific History of the Geary Act” by Alexander Jin.
Our partners at Pacific Historical Review @ucpress have made a piece from their new issue open to our readers and the public: “’No Chinese Should Obey It’: A Transpacific History of the Geary Act” by Alexander Jin.
November 18, 2025 at 5:49 PM
🧵 New, noteworthy, and open-access Western scholarship!
Our partners at Pacific Historical Review @ucpress have made a piece from their new issue open to our readers and the public: “’No Chinese Should Obey It’: A Transpacific History of the Geary Act” by Alexander Jin.
Our partners at Pacific Historical Review @ucpress have made a piece from their new issue open to our readers and the public: “’No Chinese Should Obey It’: A Transpacific History of the Geary Act” by Alexander Jin.
Reposted by Will Cowan
The Cultural Landscape Foundation will be hosting a conference, Soak it Up: Los Angeles, on design and urban flooding in Southern California, including comment from ICW's own Bill Deverell!
For info and to register: www.tclf.org/soak-it-los-...
For info and to register: www.tclf.org/soak-it-los-...
Soak it Up: Los Angeles, CA | TCLF
REGISTER NOW - In honor of the late Oberlander Prize Laureate, Kongjian Yu, global champion of the “sponge cities” concept, leading landscape architects will examine provocative solutions for urban fl...
www.tclf.org
November 20, 2025 at 10:36 PM
The Cultural Landscape Foundation will be hosting a conference, Soak it Up: Los Angeles, on design and urban flooding in Southern California, including comment from ICW's own Bill Deverell!
For info and to register: www.tclf.org/soak-it-los-...
For info and to register: www.tclf.org/soak-it-los-...
Reposted by Will Cowan
🎧 🎤 Season Five of our podcast is almost here!
🔊Sound on to hear the trailer.
Western Edition: Watersheds West launches January 2026, wherever you find podcasts.
Listen to the full prologue: westernedition.buzzsprout.com
🔊Sound on to hear the trailer.
Western Edition: Watersheds West launches January 2026, wherever you find podcasts.
Listen to the full prologue: westernedition.buzzsprout.com
December 2, 2025 at 10:24 PM
🎧 🎤 Season Five of our podcast is almost here!
🔊Sound on to hear the trailer.
Western Edition: Watersheds West launches January 2026, wherever you find podcasts.
Listen to the full prologue: westernedition.buzzsprout.com
🔊Sound on to hear the trailer.
Western Edition: Watersheds West launches January 2026, wherever you find podcasts.
Listen to the full prologue: westernedition.buzzsprout.com
Reposted by Will Cowan
@cw3eScripps is now accepting applications for its Summer 2026 undergraduate internship program! Paid & lodging provided, to work with world class weather, water, climate scientists in La Jolla, CA!
cw3e.ucsd.edu/cw3e-interns...
cw3e.ucsd.edu/cw3e-interns...
November 26, 2025 at 12:08 AM
@cw3eScripps is now accepting applications for its Summer 2026 undergraduate internship program! Paid & lodging provided, to work with world class weather, water, climate scientists in La Jolla, CA!
cw3e.ucsd.edu/cw3e-interns...
cw3e.ucsd.edu/cw3e-interns...
Reposted by Will Cowan
“CalHeatScore gives you a [heat wave/heat-health-hazard danger] warning for your community that reflects the [socioeconomic & geographic] characteristics of your community” at zip code level…all across California, a good 5-days out. Needed for many more regions!
eos.org/articles/new...
eos.org/articles/new...
New Tool Maps the Overlap of Heat and Health in California - Eos
CalHeatScore creates heat wave warnings for every zip code in California, using temperature data, socioeconomic indicators, and the history of emergency room visits, to predict heat-related health ris...
eos.org
November 28, 2025 at 4:11 PM
“CalHeatScore gives you a [heat wave/heat-health-hazard danger] warning for your community that reflects the [socioeconomic & geographic] characteristics of your community” at zip code level…all across California, a good 5-days out. Needed for many more regions!
eos.org/articles/new...
eos.org/articles/new...
Reposted by Will Cowan
The National Academies is inviting nominations for experts to review the draft United by Nature assessment. Ecology, climate, conservation, social science, sci-comm + more. If someone comes to mind—maybe you—please nominate & please the word!
www.nationalacademies.org/projects/DEL...
www.nationalacademies.org/projects/DEL...
Review of the draft United by Nature assessment
The United by Nature Assessment is designed to be “a holistic assessment of U.S. lands, waters, and wildlife, and the benefits they provide.
www.nationalacademies.org
December 2, 2025 at 8:32 AM
The National Academies is inviting nominations for experts to review the draft United by Nature assessment. Ecology, climate, conservation, social science, sci-comm + more. If someone comes to mind—maybe you—please nominate & please the word!
www.nationalacademies.org/projects/DEL...
www.nationalacademies.org/projects/DEL...