UC Berkeley Central Sierra Snow Lab
@cssl.bsky.social
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.
Pinned
Good morning! Sorry for our website woes, we have a new site that we're excited to launch but have had some issues with Berkeley's IT making the transition. It has been started but no one is in office to finish it, likely until the new year. We'll keep you updated.
Good morning! Sorry for our website woes, we have a new site that we're excited to launch but have had some issues with Berkeley's IT making the transition. It has been started but no one is in office to finish it, likely until the new year. We'll keep you updated.
December 27, 2025 at 6:24 PM
Good morning! Sorry for our website woes, we have a new site that we're excited to launch but have had some issues with Berkeley's IT making the transition. It has been started but no one is in office to finish it, likely until the new year. We'll keep you updated.
12/27/25 10am Update:
We had 6.3" (16 cm) of #snow in the last day, which brings our storm total (12/23-12/27) to 52.8" (134 cm).
We'll have sunny/clear skies over the next several days but have another chance at some precip (hopefully, snow) around the new year.
#weather #CAwx
We had 6.3" (16 cm) of #snow in the last day, which brings our storm total (12/23-12/27) to 52.8" (134 cm).
We'll have sunny/clear skies over the next several days but have another chance at some precip (hopefully, snow) around the new year.
#weather #CAwx
December 27, 2025 at 6:05 PM
12/25/25 9:35am Update:
Good morning and Merry Christmas! It's a snowy one for us. We received 23.6" (60 cm) of #snow in the last day, which brings our 2-day total to 24.8" (63 cm).
We're expecting another 2-3 feet, mostly today but a little tomorrow as well.
#CAwx #weather
Good morning and Merry Christmas! It's a snowy one for us. We received 23.6" (60 cm) of #snow in the last day, which brings our 2-day total to 24.8" (63 cm).
We're expecting another 2-3 feet, mostly today but a little tomorrow as well.
#CAwx #weather
December 25, 2025 at 5:49 PM
12/24/25 9:30am Update:
We had 1.2" (3 cm) of #snow this morning, which brings our 2-day total to 5.5" (14 cm). We have heavy snowfall rates as can be seen on radar.
Snowfall predictions have come up a bit in the last day and we're now looking at 3-5 feet by late tomorrow night.
We had 1.2" (3 cm) of #snow this morning, which brings our 2-day total to 5.5" (14 cm). We have heavy snowfall rates as can be seen on radar.
Snowfall predictions have come up a bit in the last day and we're now looking at 3-5 feet by late tomorrow night.
December 24, 2025 at 5:48 PM
12/24/25 9:30am Update:
We had 1.2" (3 cm) of #snow this morning, which brings our 2-day total to 5.5" (14 cm). We have heavy snowfall rates as can be seen on radar.
Snowfall predictions have come up a bit in the last day and we're now looking at 3-5 feet by late tomorrow night.
We had 1.2" (3 cm) of #snow this morning, which brings our 2-day total to 5.5" (14 cm). We have heavy snowfall rates as can be seen on radar.
Snowfall predictions have come up a bit in the last day and we're now looking at 3-5 feet by late tomorrow night.
Here's a quick discussion on the forecast for 12/24 to 12/26 and the hazards associated with the big #snow that we're expecting.
www.youtube.com/watch?v=-ZXI...
www.youtube.com/watch?v=-ZXI...
Big Snow in the Forecast 12/24 - 12/26, 2025
YouTube video by Central Sierra Snow Laboratory
www.youtube.com
December 23, 2025 at 8:21 PM
Here's a quick discussion on the forecast for 12/24 to 12/26 and the hazards associated with the big #snow that we're expecting.
www.youtube.com/watch?v=-ZXI...
www.youtube.com/watch?v=-ZXI...
We're working on pushing out a new version of our website today. This means that you may be unable to reach it until the work is done. Apologies for the inconvenience, please bear with us!
December 22, 2025 at 6:42 PM
We're working on pushing out a new version of our website today. This means that you may be unable to reach it until the work is done. Apologies for the inconvenience, please bear with us!
12/19/2025 2:30pm Update:
A bit of snowfall has accumulated over the last couple of hours. The rain/snow line appears to be just below our elevation at 6900 feet, we've been told for certain that it's primarily rain at 6000 feet.
More rain and snow on the way!
#snow #weather
A bit of snowfall has accumulated over the last couple of hours. The rain/snow line appears to be just below our elevation at 6900 feet, we've been told for certain that it's primarily rain at 6000 feet.
More rain and snow on the way!
#snow #weather
December 19, 2025 at 10:29 PM
Snow in the forecast?! Finally! We discuss the details in this video 👇
www.youtube.com/watch?v=a4fv...
#snow #CAwx #CAwater #weather
www.youtube.com/watch?v=a4fv...
#snow #CAwx #CAwater #weather
Rain and Snow in the 10-Day Forecast (12/18/2025)
YouTube video by Central Sierra Snow Laboratory
www.youtube.com
December 18, 2025 at 9:58 PM
Snow in the forecast?! Finally! We discuss the details in this video 👇
www.youtube.com/watch?v=a4fv...
#snow #CAwx #CAwater #weather
www.youtube.com/watch?v=a4fv...
#snow #CAwx #CAwater #weather
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.
👉 give.berkeley.edu/fund/FH5846000
Every donation makes a difference!
👉 give.berkeley.edu/fund/FH5846000
Every donation makes a difference!
December 2, 2025 at 8:52 PM
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.
👉 give.berkeley.edu/fund/FH5846000
Every donation makes a difference!
👉 give.berkeley.edu/fund/FH5846000
Every donation makes a difference!
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
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
a dog is riding a pink sled down a snowy hill .
ALT: a dog is riding a pink sled down a snowy hill .
media.tenor.com
December 1, 2025 at 10:04 PM
Interested in getting more information on recent happenings on the lab? Check out our most recent email newsletter that went out today! tinyurl.com/bm3wb95p
In it: how the water year has started, the quest for more (and easily accessed) data, and we get a new employee!
In it: how the water year has started, the quest for more (and easily accessed) data, and we get a new employee!
November 26, 2025 at 12:55 AM
Interested in getting more information on recent happenings on the lab? Check out our most recent email newsletter that went out today! tinyurl.com/bm3wb95p
In it: how the water year has started, the quest for more (and easily accessed) data, and we get a new employee!
In it: how the water year has started, the quest for more (and easily accessed) data, and we get a new employee!
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
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
November 20, 2025 at 4:51 PM
11/19/2025:
Just a friendly reminder that early season doesn't correlate to the entire season. This is the snowfall that we had on this date in 2023 (0.8") and we still ended with above average snowfall. Early season is highly variable. In other words, it isn't anywhere close to time to panic yet.
Just a friendly reminder that early season doesn't correlate to the entire season. This is the snowfall that we had on this date in 2023 (0.8") and we still ended with above average snowfall. Early season is highly variable. In other words, it isn't anywhere close to time to panic yet.
November 19, 2025 at 5:19 PM
11/19/2025:
Just a friendly reminder that early season doesn't correlate to the entire season. This is the snowfall that we had on this date in 2023 (0.8") and we still ended with above average snowfall. Early season is highly variable. In other words, it isn't anywhere close to time to panic yet.
Just a friendly reminder that early season doesn't correlate to the entire season. This is the snowfall that we had on this date in 2023 (0.8") and we still ended with above average snowfall. Early season is highly variable. In other words, it isn't anywhere close to time to panic yet.
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: csslsnowschool.com
Applications close November 15th, 2025, so don’t wait!
Get more details here: csslsnowschool.com
November 7, 2025 at 5:31 PM
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: csslsnowschool.com
Applications close November 15th, 2025, so don’t wait!
Get more details here: csslsnowschool.com
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: csslsnowschool.com
Apply to attend here: forms.gle/e8uNu6KZi9vH...
Get more details here: csslsnowschool.com
Apply to attend here: forms.gle/e8uNu6KZi9vH...
October 18, 2025 at 12:12 AM
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: csslsnowschool.com
Apply to attend here: forms.gle/e8uNu6KZi9vH...
Get more details here: csslsnowschool.com
Apply to attend here: forms.gle/e8uNu6KZi9vH...
Have an interest in weather/water and enjoy tinkering? We're launching the hydrometPi program for students, researchers, or hobbyists that want to build instruments using Raspberry Pi technology!
Tutorials and community resources are available on our website.
www.hydrometPi.org
Tutorials and community resources are available on our website.
www.hydrometPi.org
hydrometPi by CSSL
Developed At The Central Sierra Snow Laboratory
www.hydrometPi.org
October 17, 2025 at 4:39 PM
Have an interest in weather/water and enjoy tinkering? We're launching the hydrometPi program for students, researchers, or hobbyists that want to build instruments using Raspberry Pi technology!
Tutorials and community resources are available on our website.
www.hydrometPi.org
Tutorials and community resources are available on our website.
www.hydrometPi.org
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 at least the next 10 days but we'll be watching the forecast excitedly.
#CAwx #CAwater
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 at least the next 10 days but we'll be watching the forecast excitedly.
#CAwx #CAwater
October 15, 2025 at 4:28 PM
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
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
October 11, 2025 at 4:21 PM