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Gleick and Linda Nash's early-90s work on climate change and the #CORiver was groundbreaking and sadly prescient. Using GCMs and a hydrologic model, they set the standard for subsequent studies--which have confirmed their main findings again and again. As has reality.

It's #ShowYourStripes Day. Here's Colorado's 2 deg F warming since the 1980s, which has been in step with the global average warming timing-wise, but enhanced due to our inland, mid-latitude location. As it will be in the future. (Data: NOAA NCEI, via showyourstripes.info)

If you haven't yet read it--and you should--"Water is for Fighting Over..." (2016) by John Fleck is *free* from Island Press. Does the recent trajectory of the #CORiver undercut John's thesis? Or affirm how collaboration (DCPs, 500 kaf plan) can meet challenges?

One small part of the #CORiver water crunch: Scottsdale cutting off water haulers who serve nearby rural areas. But, please, this is not a "suburb": 2000 homes in 20 square miles = ~6 acres per home. That these exurbs in the West are prone to water insecurity is an old story.

Yesterday: Rainbow at sunset over Lafayette, CO. Today: 50% chance of pm showers; near zero chance of it looking as amazing as this. But I'll be watching. #cowx

Superb and sobering essay in NYT by my tree-ring colleague @locallyabsent, documenting ring-by-ring the ongoing megadrought in the West and its impacts. Incredible images too.

The Colorado River Science Wiki is now up at coloradoriverscience.org A new resource to make CO River research, data, tools, and other information more accessible Please share widely! Thx to teammates Brad Udall, Julie Vano, Tanya Petach

A blast from the past: In the late 90s I was with the NSF National Center for Atmospheric Research GPS dropsonde team, doing tech writing/editing/graphics--and I created this 'visual fact sheet.' The description still applies to the current RD41 sonde, which is dropped into dozens of storms each year.

The snow gods are giving the #ColoradoRiver and all of us in the basin a little breathing room this water year. Upper Basin now at >150% of the median SWE for mid-January, and almost 75% of the peak SWE--about three months ahead of the typical peak.

Update of the forecasted Powell inflows chart. Past 2+ weeks has been very good for the Upper Basin. Jan 1st Colorado Basin RFC forecast called for 105% of average inflows. Jan 17th forecast: 125% of average. Long way to go, but really low #ColoradoRiver flows are off the table.

Snow x Ross's Goose hybrid? Lafayette, CO - February 1, 2023 #CObirds Ted Floyd

Looking for climate change projections and related information for the Mountain West? Wed 2/8 (11 am MT), Julie Vano and I will walk through A User Guide to Climate Change Portals, on a WWA webinar. User Guide: agci.org/projects/clima…

When - It's late February - 2011 is the closest snowpack analog - Storms incoming It's OK to feel good about *this* year. Above-average runoff is now very likely. Following on @LukeRunyon: We just need halfway decent spring snow to seal the deal. #ColoradoRiver

Do you need climate-change information for local decision-making in the West (or elsewhere)? Check out this resource! And let us know if it's helpful, and how we can improve/update it. (Julie Vano of Aspen Global Change Institute and I developed it; funding: NOAA Climate.gov & Aspen Global Change Institute)

Colorado has warmed over 2 degrees F in the past 40 years, impacting water supply, water demand, wildfire risk, ecosystem resilience, and much more. #ShowYourStripes ShowYourStripes.info

#CRWUA2023 participants and onlookers: For access/links to - summaries of key areas of CRB science - important CRB datasets, tools, resources - new and recent CRB research papers - and much more Check out the Colorado River Science Wiki: coloradoriverscience.org