2/17/26 8:55am Update: It. Is. Dumping. We had 28.1" (71.5 cm) of #snow in the last day and we're expecting another 2-3 feet by tomorrow night. Anecdotally, the combination of low visibility, intense snowfall, and high winds have created the worst conditions since Feb 2023! #weather #water

2/16/26 8:35am Update: Our storm has begun and we have 9.4" (24 cm) of #snow so far with plenty more on the way! Moderate snowfall is continuing with snow-to-liquid ratios of ~12:1 - lighter and fluffier snow than we normally get! Wind and snow rates will pick up this afternoon. #CAwx #CAwater

2/15/26 10:05 am: The biggest storm of the season will start tonight! Check out the forecast and expected impacts in the most recent edition of our email forecast here 👇 mailchi.mp/83c61eb794cf...

🚨 WEBSITE DOWN 🚨 The company that hosts our data is having a problem with their servers and our website is down as a result. The website will come back up once they're able to resolve the issue.

2/11/26 9:25 am Update: We had 3.3" (8.5 cm) of #snow at the 8 am measurement. Expectedly, the storm came in warm with rain and then switched to snow last night. We expect another 1-2" today. A larger storm is poised to come through next week, potentially with feet of snow. #CAwx #CAwater

Psst... pssst... the forecast is getting better... ❄️❄️❄️ Img: snow accumulation at the nearest model grid point to the Snow Lab

2/4/26 9am Update: Model ensembles are showing a shift to wet conditions beginning Monday and continuing for most of next week. We're still too far out to nail down #snow amounts but we will post updates on expected conditions as we draw nearer to the forecast window. #CAwx #weather

1/28/26 10am Update: We had 2.8" (7 cm) of #snow overnight, which breaks our nearly 3 week dry spell. Unfortunately, it looks like this is all we'll get for at least the next 7-10 days. Following recent melt, we are now at 54% of median snowpack and 68% of snowfall to-date. #CAwx #CAwater

1/26/26 10:35 am Update: #snow is in the forecast! It's not a ton, only 2-4" on Tuesday night/early Wednesday but it should be enough to momentarily pause the dry conditions. We haven't had snow since January 8th (18 days) and this is definitely a welcome change! #CAwx #CAwater

Only a few more days to support snow science and look awesome while doing it! Our apparel fundraiser ends Monday 1/26/26 at 8am, so be sure to get yourself an awesome t-shirt, hoodie, or hat before then! Get it here: tinyurl.com/CSSLapparel #supportscience #weather #CAwx

❄️ You made it through the workweek, now it’s time to treat yourself ❄️ Grab some new apparel this weekend and show your support for snow science. Look good, feel good, give back! Proceeds will go to the @ucberkeleyofficial.bsky.social Central Sierra Snow Lab. Get it here: tinyurl.com/CSSLapparel

❄️ Wear Your Support for Snow Science! ❄️ We’re excited to launch our apparel fundraiser! Every purchase supports research, education, and operations at our historic field station. Your support makes a real impact. Get it here 👇 stores.inksoft.com/uc_berkeley_...

www.sfchronicle.com/weather/arti... @cssl.bsky.social

The new version of our website was launched today! Check out cssl.berkeley.edu to see the new site or check out our Youtube video for some details on features. youtu.be/7UxzcRF2eNU

1/5/26 10:20am Update: 1-day ❄️: 20.7" (52.5 cm) 2-day ❄️: 35.0" (89 cm) 7-day ❄️: 40.9" (104 cm) With 20.6" of #snow in the last day, we are now at our median snowfall for the 2026 water year! This most recent snowfall puts us on track for the year. #CAwx #CAwater #weather

1/4/26 9:20am Update: 1-day ❄️: 14.4" (36.5 cm) 2-day ❄️: 19.7" (50 cm) Plenty more #snow is expected today and into tomorrow with potential for another 8-16". #CAwx #CAwater #weather

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

12/26/25 10am Update: 1-day ❄️: 17.3" (44 cm) 2-day ❄️: 40.9" (104 cm) 7-day ❄️: 48.8" (124 cm) We are now at 79% of our median annual snowfall to-date. More #snow is expected today with potential for another 5-10" but it should end late tonight. #CAwx #CAwater #weather

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

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.

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...

12/23/25 10:20am Update: We had 4.3" (11 cm) of snowfall yesterday once temps cooled down a bit and are expecting much more in the next few days! A quick note, UC Berkeley's IT team is working to get our website back online ASAP and we'll keep you updated. #CAwx #CAwater

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

Snow in the forecast?! Finally! We discuss the details in this video 👇 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!

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

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!

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

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

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.

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

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

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

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...

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

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

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

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

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

👀 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

10/2/25 10:25am No snow yet but plenty of rain over the last 24 hours, which is a great start to the 2026 water year that began yesterday. These early rain storms help prime our soil and keep it moist meaning less water from our snow has to do that job later. #CAwx #CAwater

How many lightning strikes have we had around Donner Summit and the Lake Tahoe Basin since Saturday? 1500 - each with its own strength and location characteristics involving drought, fuel loads, and recent meteorological conditions. 1/2

We are looking for a company vehicle with 4x4 or AWD that we can use to get to our field sites. We don't have the biggest budget, so we're working on alternatives to buying new. The vehicle doesn't need to be a newer model or even in great running condition. 1/2 Bad AI pic for attention

The Snow Lab is hiring! We're hiring a Research Scientist to evaluate snowpack mass and energy balance response to precipitation enhancement using the Weather Research and Forecasting Hydrological (WRF-Hydro) and iSnobal models. Details here 👉 www.linkedin.com/jobs/view/42...

6/21/25 1:45pm Update: Ah yes, summertime. Long hours of sunlight, days at the lake, and... SNOW?! Yes, snow. Currently at the lab we have a mix of #snow and #graupel coming down. Nothing says summer serenity like a blanket of white! #CAwx #Weather

Looking for something to do on your Saturday? Come visit us at Legacy Day at Donner Memorial State Park! We'd love to chat with you and load you up with stickers!

The @techreview just released an article that discusses our project to create a system of sensors to measure California's snowpack temperature. Similar work from our partners @DRIScience and @USDA_NRCS is also discussed. Check it out here tinyurl.com/5ahyhtkw

5/13/25 9:45am Update: A fresh blanket of white covers the lab study site after we received 5.9" (15 cm) of late spring #snow in the last day. Other than some flurries today, there's no snow in the forecast, so this could be our last snowfall of the season. #CAwx #CAwater