Signs of some "big time" weather for TBD portions of U.S. West coast over next 10 days. A major #AtmosphericRiver, & perhaps a short sequence of very wet ARs, will affect some section of coast between NorCal & WA--perhaps bringing very heavy rain accumulations. #CAwx #ORwx [1/6]

Kicking off the Colorado River Forum in Phoenix! 🌵💧 During the next 4 days, Western legislators + water, energy, & ag leaders will tackle the Colorado River Basin’s most critical challenges. This morning’s key talks: 🔹Shana Tighi (Bureau of Reclamation): “Current Hydrology in the

Day 1 of the Colorado River Forum is in full swing! 🌊 Highlights: 🔹 Alan Rhoades, Hydroclimate Research Scientist at Berkeley Lab: “Adapting to the Colorado River of the 21st Century: Thirstier Atmosphere, Low-to-No Snow, and Compounding Extremes” 🔹 Dr. Sean McKenna,

Grateful to have MacArthur Stant II, Water Rights Attorney for the Navajo Nation Department of Justice, join the Colorado River Forum! His discussion on Tribal Water Agreements, Settlements, and Decisions highlights the critical role of tribal leadership in shaping the Basin's

A large swath of northwestern CA experienced (record-breaking) 48-hr rainfall exceeding estimated 100-yr recurrence interval (using methods that do not account for climate change) from this slow-moving #AtmosphericRiver event; heavy rain remains ongoing in some areas. #CAwx

Got a bit stormy in #Truckee just now. Winds cranking and dropping all the snow out of the trees.

Snow pit to start off 2025! ~8500 feet. Avg ❄️🌡️was -1.6 deg C. Avg ❄️ density was 363 kg/m^3. Cold content was -1.2 MJ/m^2. #LakeTahoe #CarsonPass #SWEet

The Alps are burning... in winter! 🔥😱 Current drought, high temp = several fires since 5th march -Roya Valley, 300ha (Alpes Mar, FR) (france3-regions.francetvinfo.fr/provence-alpes…) -Vinschgau, 100ha (Südtirol, IT) (latsch.it-wms.com) -SW of Wendelstein (Bayern, GER) (foto-webcam.eu)

"...GlaMBIE team [assessed]🌎glacial mass change [2000-2023]...world’s glaciers lost 5% of total volume...annual🌍loss of 273 billion tonnes of ice...the ice lost each year amounts to the💧intake of the entire🌍pop in 30 years [3 liters/day/person]...” eos.org/articles/first…

"This is an existential time in the history of the CO River. Water managers must take painful steps to avoid a catastrophic crash of the reservoirs...we suggest these [7 pillars] as an equitable balance of burdens caused by reduced flows in the system" colorado.edu/center/gwc/202…

First heli inspection of what remains of Blatten yesterday evening... 🚁😱🌊 SHOCKING! Few buildings left are flooded Little debris flow run through the deposit Look at the height reached on the counterslope! 😮 🎥 Pomona

Along the Colorado River, a very dry spring has shrunk the amount of runoff streaming into reservoirs. The latest forecast shows the river’s flows into Lake Powell will probably be about 46% of average. "It’s going to make things worse." Dr. Daniel Swain latimes.com/environment/st…

"Over 250 million acres of public lands are eligible for sale in the bill...demanding the nomination of tracts within 30 days, then every 60 days until the arbitrary multi-million-acre goal is met, all without hearings, debate or public input" wilderness.org/articles/media…

📢 New paper in npj Climate and Atmospheric Science! We examine future changes in African rainfall using 40 CMIP6 models. 🌧️ Up to +75% in the Sahara 📉 Declines in W. Southern Africa ⚠️ Model uncertainty >85% 🔗 doi.org/10.1038/s41612… #ClimateChange #CMIP6 #AfricanClimate

Proud to share Areidy Beltran recent work which examined how California's water cycle could respond to warming & the potential "trickle down" implications for agriculture, ultimately concluding that the Sierra Nevada 🏔️ may transition into the Sierra Lluviosa 🌧️iopscience.iop.org/article/10.108…

This is the typical annual loss in thickness of the Rhône glacier in recent years at this location (>7 m)... 🧊📏 Guess what ? Over last 10 days it has already lost 1 meter! 😱 Likely en route to an all-time record year...🔥📈 Pic and data: Matthias Huss

Snowpack is a key part of the #cawater supply. Now, new research led by our own Kyle Greenspan looks at how useful the Western United States Dynamically Downscaled Data set is to water managers in California looking at climate change and snowmelt. Read! agupubs.onlinelibrary.wiley.com/doi/10.1029/20…

"Trump administration is updating the [previously published] National Climate Assessments...Altering or revising previously published assessments would be a sig. escalation in the administration’s attempts to wipe credible climate science off the record" cnn.com/2025/08/07/cli…

“Climate is changing, and the rate and magnitude of change are unusual in human experience. People are the primary cause of modern climate change, mostly through burning fossil fuels. Those who study the scientific evidence overwhelmingly agree.” ametsoc.org/ams/about-ams/…

Get ready for a WILD ride across the US this week! Extreme jet stream means extreme heat in the West, and very early cold in the East! 105+ in the Pacific NW, 30s in the Great Lakes and Upper Midwest, and a real taste of Autumn in the East. No Dice for you Florida, but this