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Liveblogging the Deluge: Atmospheric River Storm Version 2.0

50 minutes agoAcademics / Geology : Geotripper

Intellicast radar image of January 18, 2017 What a strange January it has been. We were hit by the strongest storms in two decades, and there was a spate of flooding and high river flows across much of northern and central California. Show More Summary

Notes for the Aftermath

I think about earthquakes often, almost every day. That’s part of what makes a geologist — not just visualizing the deep past, but living in the deep present. Turning seeing into foreseeing. In this post I’ll talk about a bad idea, a good idea and a current lesson. The bad idea is that when the […]

One Simple Sentence Could Help Save America's Schools

If we truly want America to be great, we need to support robust education for all its citizens. -- Read more on

Liveblogging the Deluge: Wrapping Things Up (for now)

A week ago, I looked eastward from my science lab and saw the sun setting on the Sierra Nevada crest from 80 or 90 miles away. It was quite literally moments before the first outliers of the storm arrived and hid the mountains from view. Show More Summary

Liveblogging the Deluge: I've Never Seen Anything Quite This...La Grange Dam

Sometimes you just have to say "what the heck?" (or some other expletive). Some things just grab your attention that way. This was my day to say that. I was privileged to see a rare sight. I was given the opportunity to accompany some MID employees on an inspection of La Grange Dam. Show More Summary

Liveblogging the Deluge: Following Up on the Dry Creek Flood

Dry Creek in Modesto flooded to the greatest extent in two decades yesterday, with peak flows exceeding 6,000 cubic feet per second. I was out documenting the flood surge, and I managed to get to the Dry Creek Trailhead ahead of the high water around 4:30 or so. Show More Summary

Liveblogging the Deluge: "Dry" Creek Takes Center Stage Today

Dry Creek in December of 2016 before the current storms What happens when a small insubstantial creek that is dry for much of the year......gets hit with a flash flood amounting to 6,100 cubic feet per second? Let's find out! Dry Creek...Show More Summary

Liveblogging the Deluge: Perspectives on the Biggest Storm in a Decade, Part Five

We finally got a taste of some of the kinds of squalls that are leading to flooding across much of Northern California. Luckily it was brief, and we have not had problems in our immediate vicinity. The view in the video above is outShow More Summary

4 New Geologic Map Quadrangles in Arizona

Map showing approximate location of maps AZGS just released four (4) new geologic map quadrangles for western and southeastern AZ, (see map for approximate locations). The maps are free to download at our online document repository - 'Recent Submissions' at (bottom of the page). Show More Summary

Liveblogging the Deluge: Perspectives on the Biggest Storm in a Decade, Part Four

Check out some newly "discovered" footage from the floods of 1997! We've been following developments on the Stanislaus, Merced, and Tuolumne Rivers as the biggest atmospheric storm in a decade or more has been sweeping through California. Show More Summary

Liveblogging the Deluge: Perspectives on the Biggest Flood in a Decade, Part Three

The flood on the Merced River in Yosemite Valley has crested at 12.7 feet (10,488 cubic feet per second). The highest flow was recorded at 4AM, and the waters are beginning to recede. There are more storms to come in the next few days, but they will be colder, and will start producing snow instead of rain. Show More Summary

Red Rock Quarry

The Red Rock Quarry was apparently part of the Blair quarry complex in Moraga Canyon, at the west edge of Piedmont on Red Rock Road. Oakwiki reports that it was owned by the Henry Maxwell family (for whom Maxwelton Road is named). The 1947 USGS topographic map shows that the quarry was active at that […]

Liveblogging the Deluge: Perspectives on the Biggest Flood in a Decade, Part Two

Check back for updates at the end of this blog... First off, let me emphasize that I am writing almost exclusively about the central Sierra Nevada and adjacent Great Valley, particularly the drainage of the Merced, Tuolumne, and Stanislaus Rivers. Show More Summary

Liveblogging the Deluge: Perspectives on the Biggest Flood in a Decade, Part One

Printable PDF of current conditions can be found at this link It's clear by now that I am fascinated by the current atmospheric river storm that is blanketing the state of California with precipitation from one end of the state to the other. Show More Summary

Before the Deluge: Last Sunlight on the Sierra Nevada

It was a beautiful day today in Central California. Sunny, but crisp and cool. I was tooling about campus between meetings in preparation for the new semester enjoying the sunshine, but I could not forget that we stand at a precipice of sorts. Show More Summary

New Leadership at Arizona Geological Survey

Dr. Phil Pearthree AZGS has a new director and Arizona a new State Geologist. University of Arizona Dean of Science, Dr. Joaquin Ruiz, confirmed that Phil Pearthree, Ph.D., is the new director of the Arizona Geological Survey. As part of his duties, Dr. Show More Summary

Worried About Being Ready for the Big Storm? Let's Have a Practice Flood! The Tuolumne River Today

January 2016, one year ago Okay, this is a bit odd. There is a lot of news about the coming atmospheric storm that will strike California this weekend, with the possibility of some truly epic (in the bad way) flooding across central and northern California. Show More Summary

Notes from the North: Snow and Ice

It's been icy cold in the far northlands, with temperatures hovering not too far above zero for several days. The snow isn't really all that deep, only 8 inches in the back yard, but it's covering everything and hanging fairly heavy on the trees. Show More Summary

Coming Floods This Week May Rival 1997: Predictions at Yosemite Valley

National Park Service Photograph This weekend's storm, if it lives up to predictions, may be one for the history books. Present projections are suggesting that the Merced River could rival the flows from the apocalyptic floods of 1997. Show More Summary

Coming California Storm is Reminescent of Flooding Events Past

Source: Washington Post We are waiting for the arrival of two intense storms over the course of the next week, a pair of "atmospheric river storms". Strong low pressure cells originating in the Bay of Alaska are going to tap into a flow...Show More Summary

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