I agree. This event has been meteorologically astonishing, and its impacts will be felt long after it ends in terms of record low snowpack, sharply increased wildfire risk, and extreme low watershed runoff/streamflow into summer and beyond.
As the first reanalysis data become available, I think I can say with a fairly high degree of confidence that the March 2026 heatwave will go down as the most anomalously extreme heat event ever observed at any time of year in the southwestern U.S.
March 25, 2026 at 9:25 PM
I agree. This event has been meteorologically astonishing, and its impacts will be felt long after it ends in terms of record low snowpack, sharply increased wildfire risk, and extreme low watershed runoff/streamflow into summer and beyond.
Sudden streamflow changes (e.g., regime shifts and extreme events) have been increasing with time across the continental United States.
This is another signal of #climate change.
www.nature.com/articles/s41...
This is another signal of #climate change.
www.nature.com/articles/s41...
Streamflow in the United States: Characteristics, trends, regime shifts, and extremes - Scientific Data
Scientific Data - Streamflow in the United States: Characteristics, trends, regime shifts, and extremes
www.nature.com
July 14, 2026 at 7:55 PM
Sudden streamflow changes (e.g., regime shifts and extreme events) have been increasing with time across the continental United States.
This is another signal of #climate change.
www.nature.com/articles/s41...
This is another signal of #climate change.
www.nature.com/articles/s41...
An incredible group of scientists and colleagues joined forces to support improved data, modeling, and analyses of headwater streamflow to improve surface water protections globally. Check out our paper, hot off the presses, in @naturewaterjnl.bsky.social. www.nature.com/articles/s44...
Advancing the science of headwater streamflow for global water protection - Nature Water
Despite their substantial contributions to watershed resilience, headwater streams are becoming increasingly imperilled. This Perspective summarizes the status of headwater streamflow information and ...
www.nature.com
January 2, 2025 at 5:20 PM
An incredible group of scientists and colleagues joined forces to support improved data, modeling, and analyses of headwater streamflow to improve surface water protections globally. Check out our paper, hot off the presses, in @naturewaterjnl.bsky.social. www.nature.com/articles/s44...
The Ganga River, which sustains the lives of at least 600 million people, is facing its worst dry spell and lowest streamflow in 1,300 years because of over-extraction of #water and #climatechange.
news.mongabay.com/short-articl...
news.mongabay.com/short-articl...
India’s Ganga River drying at unprecedented levels
The Ganga River, which sustains the lives of at least 600 million people, is facing its worst dry spell and lowest streamflow in 1,300 years, according to a recent study, reports Mongabay India’s Simr...
news.mongabay.com
November 6, 2025 at 12:57 AM
The Ganga River, which sustains the lives of at least 600 million people, is facing its worst dry spell and lowest streamflow in 1,300 years because of over-extraction of #water and #climatechange.
news.mongabay.com/short-articl...
news.mongabay.com/short-articl...
3-6” of rain in less than 3 hr causing significant flash flooding in the heart of Chicago. MRMS FLASH unit streamflow values maxed out.
July 9, 2025 at 4:21 AM
3-6” of rain in less than 3 hr causing significant flash flooding in the heart of Chicago. MRMS FLASH unit streamflow values maxed out.
New paper by Dongmei Feng finds an interesting pattern in global streamflow trends through time: increasing streamflow in upstream river reaches and decreasing flow in downstream reaches: www.science.org/doi/full/10....
December 31, 2024 at 5:15 PM
New paper by Dongmei Feng finds an interesting pattern in global streamflow trends through time: increasing streamflow in upstream river reaches and decreasing flow in downstream reaches: www.science.org/doi/full/10....
New research finds that spring runoff consists of more "old" water than new snowmelt, whereas "new" snowmelt infiltrates to replace previously stored water. Forests likely depend on groundwater that has been stored for multiple years.
Funded by Natl Science Foundation
www.nature.com/articles/s43...
Funded by Natl Science Foundation
www.nature.com/articles/s43...
Groundwater dominates snowmelt runoff and controls streamflow efficiency in the western United States - Communications Earth & Environment
Snowmelt runoff in the western US is composed primarily of older groundwater, with precipitation taking 5.7 years on average to exit as streamflow, indicating that annual streamflow is a function of m...
www.nature.com
May 6, 2025 at 1:58 PM
New research finds that spring runoff consists of more "old" water than new snowmelt, whereas "new" snowmelt infiltrates to replace previously stored water. Forests likely depend on groundwater that has been stored for multiple years.
Funded by Natl Science Foundation
www.nature.com/articles/s43...
Funded by Natl Science Foundation
www.nature.com/articles/s43...
Helene triggering exceptionally high streamflow conditions across the southeast US. waterdata.usgs.gov/nc/nwis/rt
September 28, 2024 at 9:41 PM
Helene triggering exceptionally high streamflow conditions across the southeast US. waterdata.usgs.gov/nc/nwis/rt
And we’re back for our traditional semi-occasional streamflow observation on the Truckee River.
Midsummer and we’ve halved the flow to ≈550 cfs at 9 AM.
Midsummer and we’ve halved the flow to ≈550 cfs at 9 AM.
July 12, 2026 at 11:48 PM
And we’re back for our traditional semi-occasional streamflow observation on the Truckee River.
Midsummer and we’ve halved the flow to ≈550 cfs at 9 AM.
Midsummer and we’ve halved the flow to ≈550 cfs at 9 AM.
Streamflow/discharge 🫣
November 10, 2024 at 1:35 AM
Streamflow/discharge 🫣
🌊 Streamflow Stripes are here!!! 🌊
Just in time for #ShowYourStripes Day – 21st June 🌍
Our team at @ukceh.bsky.social has created UK river flow stripes to visualise how these have changed over time.
📖 Read more: climatelabbook.substack.com/p/visualisin...
#ClimateChange #Hydrology #DataViz
Just in time for #ShowYourStripes Day – 21st June 🌍
Our team at @ukceh.bsky.social has created UK river flow stripes to visualise how these have changed over time.
📖 Read more: climatelabbook.substack.com/p/visualisin...
#ClimateChange #Hydrology #DataViz
Visualising climate impacts on UK river flows
Introducing streamflow stripes #ShowYourStripes
climatelabbook.substack.com
June 20, 2025 at 8:26 PM
🌊 Streamflow Stripes are here!!! 🌊
Just in time for #ShowYourStripes Day – 21st June 🌍
Our team at @ukceh.bsky.social has created UK river flow stripes to visualise how these have changed over time.
📖 Read more: climatelabbook.substack.com/p/visualisin...
#ClimateChange #Hydrology #DataViz
Just in time for #ShowYourStripes Day – 21st June 🌍
Our team at @ukceh.bsky.social has created UK river flow stripes to visualise how these have changed over time.
📖 Read more: climatelabbook.substack.com/p/visualisin...
#ClimateChange #Hydrology #DataViz
The unofficial title of my #AGU24 poster is "We read 169 papers on streamflow reconstruction from tree rings, ask me anything". 😅 Drop by my poster on Monday morning to talk about tree rings, the water cycle, or anything in between.
agu.confex.com/agu/agu24/me...
agu.confex.com/agu/agu24/me...
Multi-century tree-ring based streamflow reconstructions: A 30-year review of data, models, and geographical foci
Streamflow reconstructions based on tree-ring data play a fundamental role in c...
agu.confex.com
December 3, 2024 at 1:30 PM
The unofficial title of my #AGU24 poster is "We read 169 papers on streamflow reconstruction from tree rings, ask me anything". 😅 Drop by my poster on Monday morning to talk about tree rings, the water cycle, or anything in between.
agu.confex.com/agu/agu24/me...
agu.confex.com/agu/agu24/me...
We figured out how to measure streamflow from timelapse images taken by an inexpensive, off-the-shelf trail camera, thus making hydrologic monitoring something pretty much any one can do, any where. usgs.gov/apps/ecoshed...
January 29, 2025 at 4:34 AM
We figured out how to measure streamflow from timelapse images taken by an inexpensive, off-the-shelf trail camera, thus making hydrologic monitoring something pretty much any one can do, any where. usgs.gov/apps/ecoshed...
Streamflow, Thornthwaite, Cumbria.
June 15, 2025 at 6:40 AM
Streamflow, Thornthwaite, Cumbria.
Excited to unveil Caravan-Qual! 🌊
We've expanded the Caravan framework to bridge the gap between water quantity and quality.
This new open dataset features: 🔹 ~70M observations 🔹137k stations 🔹 100 constituents 🔹 Linked streamflow, forcing & attributes
Links in 🧵
We've expanded the Caravan framework to bridge the gap between water quantity and quality.
This new open dataset features: 🔹 ~70M observations 🔹137k stations 🔹 100 constituents 🔹 Linked streamflow, forcing & attributes
Links in 🧵
December 18, 2025 at 8:00 AM
Excited to unveil Caravan-Qual! 🌊
We've expanded the Caravan framework to bridge the gap between water quantity and quality.
This new open dataset features: 🔹 ~70M observations 🔹137k stations 🔹 100 constituents 🔹 Linked streamflow, forcing & attributes
Links in 🧵
We've expanded the Caravan framework to bridge the gap between water quantity and quality.
This new open dataset features: 🔹 ~70M observations 🔹137k stations 🔹 100 constituents 🔹 Linked streamflow, forcing & attributes
Links in 🧵
At the beginning of September, #streamflow was below average for most regional rivers, especially in Colorado and Utah. On September 9, record-low daily streamflow was recorded at 30 or more sites in Colorado, 10 sites in Utah, and two in Wyoming.
September 22, 2026 at 10:37 PM
At the beginning of September, #streamflow was below average for most regional rivers, especially in Colorado and Utah. On September 9, record-low daily streamflow was recorded at 30 or more sites in Colorado, 10 sites in Utah, and two in Wyoming.
Laaha et al. haben Erkenntnisse zu "Abflusstrends in Österreichs Fließgewässern 1977–2020" 2025 in der ÖWAW zusammengefasst. Auszug Zusammenfassung "Während sich im Mittel über Ö. der Mittelwasserabfluss wenig verändert hat, sind regionale Verschiebungen des Wasserdargebots zu verzeichnen,... 4/x
Abflusstrends in Österreichs Fließgewässern 1977–2020 - Österreichische Wasser- und Abfallwirtschaft
This article analyses streamflow trends in Austria for 250 gauges (low flows and mean flows) and 331 gauges (floods) in the period 1977–2020. While the mean streamflow has changed little on average in...
link.springer.com
April 28, 2026 at 11:07 AM
Laaha et al. haben Erkenntnisse zu "Abflusstrends in Österreichs Fließgewässern 1977–2020" 2025 in der ÖWAW zusammengefasst. Auszug Zusammenfassung "Während sich im Mittel über Ö. der Mittelwasserabfluss wenig verändert hat, sind regionale Verschiebungen des Wasserdargebots zu verzeichnen,... 4/x
“Anthropogenic climate change has driven large decreases in water supply (snowpack and streamflow) and increases in water demand (irrigation demand), with roughly half attributable to the Carbon Majors.
1/
www.nature.com/articles/s43...
1/
www.nature.com/articles/s43...
Carbon emissions exacerbating the Western US water crisis - Communications Earth & Environment
Human-caused climate change drove large decreases in snowpack and streamflow as well as increases in irrigation demand in the western US (2014-2024), with roughly half attributable to the Carbon Major...
www.nature.com
August 25, 2026 at 5:30 PM
“Anthropogenic climate change has driven large decreases in water supply (snowpack and streamflow) and increases in water demand (irrigation demand), with roughly half attributable to the Carbon Majors.
1/
www.nature.com/articles/s43...
1/
www.nature.com/articles/s43...
Big CONGRATS to @kacizarek.bsky.social!!! Her new paper is out in @agu.org's JGR-B!
The paper has a little bit of everything -- N biogeochemistry, intermittent stream hydrology, concentration-connectivity relationships!
Check it out here: agupubs.onlinelibrary.wiley.com/doi/full/10....
The paper has a little bit of everything -- N biogeochemistry, intermittent stream hydrology, concentration-connectivity relationships!
Check it out here: agupubs.onlinelibrary.wiley.com/doi/full/10....
March 27, 2025 at 1:00 PM
Big CONGRATS to @kacizarek.bsky.social!!! Her new paper is out in @agu.org's JGR-B!
The paper has a little bit of everything -- N biogeochemistry, intermittent stream hydrology, concentration-connectivity relationships!
Check it out here: agupubs.onlinelibrary.wiley.com/doi/full/10....
The paper has a little bit of everything -- N biogeochemistry, intermittent stream hydrology, concentration-connectivity relationships!
Check it out here: agupubs.onlinelibrary.wiley.com/doi/full/10....
Agricultural tile drains, which are widely used across the Midwestern USA, are used to reduce waterlogging. In this new Env Res Letters article, Seth Adelsperger (IU PhD candidate) et al. show that they also increase the duration, frequency, and severity of streamflow drought. #climate #geosky 🧪
Agricultural tile drains increase the susceptibility of streams to longer and more intense streamflow droughts - IOPscience
Agricultural tile drains increase the susceptibility of streams to longer and more intense streamflow droughts, Seth Adelsperger, Darren Ficklin, Scott Robeson, Margaret Zimmer, John C Hammond, Damon M Hall, J.P. Gannon
iopscience.iop.org
September 10, 2024 at 5:49 PM
Recently some incredibly heavy rainfall (for Arizona) has occurred southwest of Payson, AZ. MRMS rainfall shows up to 3” in an hour has fallen with training storms, and MRMS FLASH unit streamflow shows extreme runoff indicative of potentially serious flash flooding.
September 19, 2025 at 12:36 AM
Recently some incredibly heavy rainfall (for Arizona) has occurred southwest of Payson, AZ. MRMS rainfall shows up to 3” in an hour has fallen with training storms, and MRMS FLASH unit streamflow shows extreme runoff indicative of potentially serious flash flooding.
Major flash flooding in progress in NJ from Elizabeth west to Middlesex and New Providence. MRMS FLASH showing widespread unit streamflow values greater than 10 with some values greater than 20, indicative of serious flash flooding. Intense rainfall still in progress.
July 14, 2025 at 10:59 PM
Major flash flooding in progress in NJ from Elizabeth west to Middlesex and New Providence. MRMS FLASH showing widespread unit streamflow values greater than 10 with some values greater than 20, indicative of serious flash flooding. Intense rainfall still in progress.
Streamflow in the Missouri River basin is on the rise. In new #AGUPubs work, researchers took a deep dive into what’s causing it. 🧪
What Is Causing the Missouri River Basin’s Elevated Streamflow? - Eos
Regional climate variability plays a big role, but reduced forest cover and a rise in atmospheric carbon dioxide are also factors.
eos.org
March 22, 2025 at 7:00 PM
Streamflow in the Missouri River basin is on the rise. In new #AGUPubs work, researchers took a deep dive into what’s causing it. 🧪
Interested in headwater streams? Headwaters make up 77% of global river networks, but have fewer gauges, less accurate models and lesser protections than large rivers. See our review led by @goldenwater.bsky.social at www.nature.com/articles/s44...
Advancing the science of headwater streamflow for global water protection - Nature Water
Despite their substantial contributions to watershed resilience, headwater streams are becoming increasingly imperilled. This Perspective summarizes the status of headwater streamflow information and ...
www.nature.com
January 14, 2025 at 1:09 AM
Interested in headwater streams? Headwaters make up 77% of global river networks, but have fewer gauges, less accurate models and lesser protections than large rivers. See our review led by @goldenwater.bsky.social at www.nature.com/articles/s44...
Did NOT see this coming!!
Analysis of 2.9M rivers globally finds that, on avg 1984-2018, streamflow increased in headwaters & declined in downstream sections (1.7 times more upstream increases found than declines; ~4 times more downstream declines than increases).
www.science.org/doi/abs/10.1...
Analysis of 2.9M rivers globally finds that, on avg 1984-2018, streamflow increased in headwaters & declined in downstream sections (1.7 times more upstream increases found than declines; ~4 times more downstream declines than increases).
www.science.org/doi/abs/10.1...
More flow upstream and less flow downstream: The changing form and function of global rivers
We mapped daily streamflow from 1984 to 2018 in approximately 2.9 million rivers to assess recent changes to global river systems. We found that river outlets were dominated by significant decreases i...
www.science.org
December 13, 2024 at 5:24 PM
Did NOT see this coming!!
Analysis of 2.9M rivers globally finds that, on avg 1984-2018, streamflow increased in headwaters & declined in downstream sections (1.7 times more upstream increases found than declines; ~4 times more downstream declines than increases).
www.science.org/doi/abs/10.1...
Analysis of 2.9M rivers globally finds that, on avg 1984-2018, streamflow increased in headwaters & declined in downstream sections (1.7 times more upstream increases found than declines; ~4 times more downstream declines than increases).
www.science.org/doi/abs/10.1...