UC Berkeley Central Sierra Snow Lab @UCB_CSSL X Profile

UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

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The CSSL is a research station of UC Berkeley specializing in snow physics, snow hydrology, meteorology, and climatology. The lab is at an elevation of 6894 ft.

https://t.co/CRMIOfEZ3p

Soda springs, California

Joined April 2021

Don't wanna be here? Send us removal request.

UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

4 days

🤞

NWS Sacramento

@NWSSacramento

5 days

Confidence is slowly increasing on a pattern change to unsettled weather next week, bringing along the potential for precipitation and breezy southerly winds. Check back with us for updates as we get closer! #CAwx

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Rob Mayeda

@RobMayeda

13 days

Fall storms have been warmer, and taking a more southerly track into Southern California which is reflected in the low vs. average snowpack numbers to start December (quite the change from last year) Snow numbers lagging at @UCB_CSSL but overall precip (rain+snow) is above

Rob Mayeda

@RobMayeda

13 days

Early season rain surpluses fading some with late November into early December dry weather continues. Overall, conditions are mostly better rain wise statewide vs. the same time last w/ SoCal seeing record rain at times in November. The Sierra however is a different story. (1/2)

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

14 days

On this #GivingTuesday, help us develop K-8 materials/activities, enable our scientists to travel to schools to engage with students, and increase our presence at events where we can meet and interact with community. https://t.co/jXztLMw8oR Every donation makes a difference!

give.berkeley.edu

Empower students & faculty to embody the Fiat Lux spirit!

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

14 days

Happy first day of meteorological winter! We haven't seen a ton of #snow yet but we have had rain, so we're in relatively good shape. With that said, we're hoping to see snow in the forecast sooner than later so we can really start building our seasonal snowpack! #CAwz #CAwater

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

20 days

Interested in getting more information on recent happenings on the lab? Check out our most recent email newsletter that went out today! https://t.co/1GSkVQ1RJb In it: how the water year has started, the quest for more (and easily accessed) data, and we get a new employee!

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

25 days

11/21/25 8:45am Update: Another 1.2" (3 cm) of #snow fell in the last day, which brings our storm total to 3.9" (10 cm) and our 7-day total to 12.4" (31.5 cm). We are now at 89% of median snowfall and 167% of median precipitation (rain & snow) to-date. #CAwx #CAwater

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

26 days

11/20/25 8:50am Update: We have 2.8" (7 cm) of new #snow with light to moderate snowfall rates continuing this morning. Our 7-day total to 11.6" (29.5 cm). Snow will continue through this evening and is expected to be the last for at least the next 7-10 days. #CAwx #CAwater

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

29 days

11/17/25 9:30am Update: Light to moderate snow in the last 24 hours has resulted in #snow accumulation of 5.1" (13 cm). We're expecting another 3-4" throughout today and tonight. Another storm is on the horizon and is expected to come through around Thurs. #CAwx #CAwater

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

1 month

Applications for this year's CSSL Snow Science School occurring January 14-16, 2026 are now open! We encourage undergrad/grad students and career professionals to apply. Applications close November 15th, 2025, so don’t wait! Get more details here: https://t.co/BH4lGyxwr3

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

1 month

11/5/2025 9:35am Update: The storm has arrived and is bringing us #snow. In fact, between the snow and windy conditions, it's absolutely dumping out there! Most of the precipitation is expected to be rain, so we probably won't see too much accumulation, if any. #CAwx #CAwater

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

2 months

10/26/25 9:25am Update: We have 2" (5 cm) of #snow this morning. More precipitation expected today but warm temps means that it will be rain rather than snow. This looks like the only precip for the foreseeable future but early season moisture is always good! #CAwx #CAwater

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

2 months

Applications for this year's CSSL Snow Science School occurring January 14-16, 2026 are now open! Applications close November 15th, 2025, so don’t wait! Get more details here: https://t.co/BH4lGyxwr3 Apply to attend here: https://t.co/OY4xbOPDnA

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NWS Climate Prediction Center

@NWSCPC

2 months

Updated Key Message for Atmospheric river event favors increased chances of stormy weather over the Western U.S. during late October https://t.co/miSniPvsny

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

2 months

Have an interest in weather/water and enjoy tinkering? We're launching the hydrometPi program ( https://t.co/HmKDsHjXDS) for students, researchers, or hobbyists that want to build instruments using @Raspberry_Pi tech! Tutorials and community resources are on our website.

hydrometpi.org

Developed At The Central Sierra Snow Laboratory

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

2 months

Note, the water year is from October 1 to September 30th. So, even though we have had a few years with the first snowfall in September, that's technically the end of the water year, not the beginning.

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

2 months

How did this year's first #snow date compare to what we've seen in the past? Check out our calendar of first snowfall occurrences below for the details 👇 We're right in that early to mid-October hotspot of activity. #CAwx #CAwater

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

2 months

10/15/25 9:20am Update: It's official! Our first measurable snowfall happened. We had 7.3" (18.5 cm) of #snow accumulation at our measurement this morning. It looks like we're done with snow for the next 10 days but we'll be watching the forecast excitedly. #CAwx #CAwater

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

2 months

10/13/25 9:30am Update: Not enough #snow for a measurement this morning because we only measure accumulation greater than 0.5 cm (0.2"). Something tells us we'll have enough within the next 24 hours though... #CAwx #CAwater

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

2 months

10/11/2025 9:15am Update: Models continue to shift as we move closer to our forecasted #snow for the early half of this week. Currently, model guidance suggests 12-16" of accumulation at our lab Mon-Weds and we'll update as we get closer and outlooks change. #CAwx #CAwater

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UC Berkeley Central Sierra Snow Lab

@UCB_CSSL

2 months

👀 Is it happening? It might be happening. We'll be keeping an eye on the model runs but early next week is looking pretty good... ❄️❄️❄️ #Snow #CAwx

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