California Air Resources Board graphic featuring a stylized illustration of a person standing outdoors in a landscape with trees, hills, water, and mountains. The person holds a large sign in front of them that shows a globe with people around it engaging in activities like reading, climbing a ladder, and using a phone. A hot air balloon and clouds appear around the globe. Text on the sign reads, “Act. Amplify. Save.” The CARB logo is displayed in the top right corner.

🌎 #EarthDay2026 may be winding down, but the impact keeps going!

From cleaner ZEVs to smarter water use, less food waste, rainwater collection & increased active transportation use—Californians are proving small actions add up.

Keep it up, CA—every choice makes a difference!

Well dang. This week marks the end of my time at @cira-csu.bsky.social.

It has been an amazing six years and I'm incredibly proud of the work the team has accomplished. Excited to watch their future success.

A few of my favorite images I made over the last few years:

I’m salivating over your rocks and wildflower photos!! Wanted to get out there last weekend but decided not to risk crossing the Sierra to come back on Monday. Will see what the coming weeks have in store for us…

Oh absolutely! 💯

But the aurora makes up for it…

A map showing record highs in 2025 as colored bubbles. This focuses on ThreadEx stations which are the longest term/best QCed overall.

Record warmth far outpaced cold again last year: www.washingtonpost.com/weather/2026...

Yup, rough night for Santa !

Same to you, Bob! Wishing you a joyful Christmas with loved ones 🎄

A set of Train tracks stretching into the distance and in thick fog

A train station platform on a rainy morning

December commute has gone from mistily wet to slipperily wet.

😔

Fall foliage in a park in Sacramento

Fall foliage in a park in Sacramento

Downtown Sacramento still displaying fall colors in full force come the beginning of winter
#solstice

It is hard to overstate how critical @ncar-ucar.bsky.social is to climate science in the US and around the world. It's the beating heart of our field. Generations of scientists have trained there, and almost everyone I know relies on deep collaborations with NCAR scientists. It's end is unthinkable.

NCAR is a unique & valuable asset - far more than a climate model, or observations, or technology, or training ground, or gathering space. It covers weather, space weather, data, climate, paleo-climate, and everything in-between. It's building is an icon, but it's iconic status goes far beyond that.

Unbelievable. This would be a terrible blow to American science, writ large. It would decimate not only climate research, but also the kind of weather, wildfire, and disaster research that has underpinned half a century of progress in prediction, early warning, and increased resilience.

Tule fog has occupied the skies of California's Central Valley for over three weeks.

Chiming in to the #aurora colors on the internet tonight, from Rocklin, CA. My first of seeing the dancing green!

Why did the Road Cross the San Andreas Fault? 23 Years of Geologic Change (a new Update) 2002 I've been leading geology field studies trips to lots of places in the American West for 37 years and started to take digital pictu...

geotripper.blogspot.com/2025/10/why-... I've been monitoring a road crossing for 23 years now, documenting the effect of fault creep along the San Andreas near Pinnacles National Park. Here's how it looked last weekend! #sanandreasfault

A group of people gathered around a table during a workshop discussion. One participant speaks while others listen attentively. The table is covered with notes, colorful building blocks, and large sheets of paper with handwritten ideas.

Have you heard? The country’s first electric tugboat, displacing 30,000 gallons of diesel fuel per year, is operating in the Port of San Diego! The community, long impacted by local pollution, has made major strides to reduce emissions.

Learn more: bit.ly/3JFA5wV

@sdapcd.bsky.social

Tropical moisture from Priscilla and Raymond bombarded the desert Southwest over the last few days, leading to many instances of flash flooding.

There is a slight risk of excessive rainfall for the area today.

Radar image of Salt Lake City area with a front sweeping through

Graph showing temperature at SLC for the past day. Notably, large drop of temperature in the late afternoon and evening hours due to storm

Temperature was a t-shirt-and-shorts 77F at 4:30pm, then plummeted to 46F by 6:30pm with a wind chill of 36F.
Exciting couple of hours of stopover for me, but I hope all the concert (RedWest) goers and football (ASU vs. Utah) fans were prepared!

Admin building at University of Utah, set against blue skies with white clouds

Dash cam photo of a freeway in heavy rain

Arrived at Salt Lake City late afternoon today, partly sunny but with all the harbingers of a storm coming. Within 2 hours, the cold front swept through with strong gusts, lightning, and torrential downpours.

Me standing in front of a cross section of a tree

Close up photo of the cross section of a tree, showing tree rings

Dendrochronologist check-in at Lowman, ID. This tree has beautiful complacent rings, which date back to 1732 (year when George Washington was born) and through 2016 when the Pioneer Fire in Boise National Forest burned 188k acres.

Rare lightning storm lights up San Francisco sky California was hit by thousands of lightning strikes from Tuesday to Thursday, including parts of the Bay Area that average fewer lightning strikes than nearly anywhere else in the country.

Rare lightning storm lights up San Francisco sky www.sfchronicle.com/weather/arti...

Sunset sky with dark clouds looming overhead but bright red afterglow near the horizon and foreground clouds

What a surreal afterglow tonight! Brightly lit virga on the horizon + dark mammatus clouds overhead. #CAwx

It's true, the Emotional Support Pickle was this year's Most Unusual Item found during California #CoastalCleanupDay.

Took a lunch time stroll to the State Library today and was surprised by a visit from our First Partner. Happy 175 years of statehood, California!

Happy 175th Birthday, California! 🎉☀️

Land of opportunity. Beacon of possibilities.

Here's to powering forward a bright future driven by clean energy and fueled by the collaborative, innovative, and resilient spirit of the Golden State. ⚡

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The lightning-sparked Garnet Fire in California’s Sierra National Forest is burning through part of a giant sequoias grove. Some of the trees are 3,000 years old.

🔗: www.kcra.com/article/garnet-fire-gian...
📷: AP

Photo of clouds

Today on International Day of Clean Air for Blue Skies, we recognize that clearer skies are not just a goal, they are a scientific journey. ☀️☁️

AGU’s JGR: Atmospheres advances research on how the atmosphere shapes climate and Earth systems: buff.ly/cd3K5s9

📸: Nina Črnivec

#AGUPubs #CleanAirDay

Assistant Professor - Plant Resilience to Climate Change - Department of Plant and Microbial Biology University of California, Berkeley is hiring. Apply now!

Our department (Berkeley PMB) is hiring an asst. prof. in Plant Resilience to Climate Change! aprecruit.berkeley.edu/JPF05049