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

5/12/25 3:30pm Update: It's not over yet! We've been getting snow all day and it has led to some wonderful spring conditions ❄️❄️❄️

Yesterday we held our final winter and snowpack briefing of the season that corresponded to the final snow survey in #California. Overall, another great season with statewide snowpack reaching average, which makes three years in a row. Check it out here: youtu.be/D6DYrCA7X2Q?...

4/27/25 9:40am Update: Another 4.3" (11 cm) of #snow over the last day brings our season total to 362.99" (922 cm), ~3" (7 cm) over our median annual snowfall of 360" (915 cm). We had 100% of April 1 median for SWE and are now above average for accumulation too! 1/2 #CAwx #CAwater

#Snow started shortly after midnight and we have accumulated 4.5" (11.5 cm) so far with light to moderate rates. We expect more snow through tomorrow with the heaviest rates being overnight tonight and another 5-10" at the lab. #CAwx #CAwater

Mwah hahahaha! You thought it was spring but the weather has other plans! ❄️❄️❄️ We are expecting some late-season snow this weekend (April 26 & 27, 2025) above 6000 feet, most of which will fall Saturday night into Sunday morning. We're currently expecting 6-12" at the lab. #CAwx #CAwater

We're exciting to be participating in the Tahoe Truckee Earth Day Festival this Saturday April 26, 2025 at the Palisade's Tahoe Village! Come out to chat with us about all things snow, our research, and educational programs. Or, just stop by to grab yourself a CSSL sticker!

There are over 250 snow survey sites in California where crews take manual measurements with hollow tubes, known as Federal Samplers, once a month from Feb to May! This video is from late May when we did the Onion Creek in the American River Basin April 1 measurement.

4/8/25 8am Update: Today we're at 115% of median snow water equivalent to-date, largely due to last week's storms. Higher than average temperatures take over today and will continue through Friday, which should substantially increase melt. Ablation season is here! #CAwx #CAwater

DRI’s Anne Heggli working with the @cssl.bsky.social, testing a new method for measuring #snowpack temperature. Thank you, Anne, for sharing pictures of your #fieldwork. Learn more about Anne's work: bit.ly/hegglirainonsnow #ScienceThatMattersNow

Today we've hit 99% of our April 1 average snowpack statewide and 100% of average for this date. That last storm really helped out! Three years at or above average is exceedingly rare in California with the last occurrence being in the late 1990s. Time to celebrate! #CAwater #snow

4/2/25 9:30am Storm Update: 24 hour ❄️: 13.2" (33.5 cm) 2-day snow ❄️: 31.1" (79 cm) Storm total (6-day) ❄️: 43.9" (111.5 cm) Some light #snow showers are possible today and tomorrow but accumulations are only expected to be 0-2" (0-5 cm). #CAwx #CAwater

4/1/25 10:15am Update: This morning in Barbie Land we had 17.9" (45.5 cm) of #snow from the last day, which brings our storm total to 25.4" (64.5 cm) so far. We have now had 341" (866 cm) since the start of the water year on October 1st. More on the way today! #CAwx #CAwater

After a lot of consideration and debate, we have chosen to rebrand due to the high amount of rain that we've received. We will no longer be the Central Sierra Snow Lab but, instead, will be the Basic Atmospheric Research on Basin Inflow Efficiencies (BARBIE) project.

3/31/2025 10am Update: Cold and windy conditions this morning with 7.5" (19 cm) of #snow in the last day and 9.6" (24.5 cm) in the last 2 days. We're expecting 2-4 feet of snow through tomorrow night, which should bring us close to hitting average on April 1! #CAwx #CAwater

5/30/25 09:20am Update: We had 2.2" (5.5cm) of #snow in the last day and moderate to heavy bands of snow are now moving through. Our interval board, used to measure snowfall over a set period of time, is ready to catch plenty of new snow over the next few days. #CAwx #CAwater

🚨 3/30/25 8:55am 🚨 CSSL Web Server Update: Our website is down as UC Berkeley campus IT does critical mechanical and electrical system upgrades. Services will be restored at 10:30pm today.

🚨 3/30/25 8:30am 🚨 We are aware of an issue with our web server and have been investigating. It looks like this may be a larger problem than just our machine and will likely take some time to solve. We'll keep you updated as things progress.

3/29/25 9:45am Update We've had 3.1" (8 cm) of #snow in the last 2 days with 1" (2.5 cm) over the last 24 hours. Tomorrow morning starts a stormy period that should last 4-5 days and is currently expected to bring us 3-4 feet of snow. The season isn't over yet! #CAwx #CAwater

We're expecting a wet start to April with some big time #snow! There's a fair bit of agreement between the American and European ensembles that show us getting up to 60" of snow in the next 10 days. Plot: Experimental snow ensembles from our friends at the University of Utah #CAwx #CAwater

We began a new program with our friends at Donner Memorial State Park this winter. Snow Science Snowshoe Tours were led by lab staff to teach about the importance of snow and how we measure it. The tours were held on February and March 8th and were a hit with 76 people participating!

We've come a long way since the end of January and have gotten back on track. Statewide, the snowpack is now at 95% of its April 1st average, typically the maximum measurement of the season. #Snow #CAwx #CAwater

POV: You're a rock at the bottom of a snow pit seeing the sky for the first time since Nov 12, 2024! We recently hosted students learning about snow at the Headwaters Science Institute. They took the opportunity to talk to our researcher who was making snow pit measurements & observe how it's done.

5/20/2025 10:30am Update: We had 2.2" (5.5cm) of #snow at our measurement this morning. After some light snow showers tomorrow, things will be dry and warm over the next week. We may see the return of precip around April 1 but it's too early to tell for sure. #CAwx #CAwater

The #snow received over the last week has helped bring the statewide snowpack up from 77% to 90% of the April 1 average. However, dry conditions expected to take over later this week and last 7-10 days are likely to prevent us from attaining an average snowpack this year. 1/2 #cawx #CAwater

It is DUMPING out there right now! #snow #CAwx #CAwater

3/17/25 10:45am Update: A snowy morning on the hike into the lab! We had 10.8" (27.5 cm) of #snow this morning and we are now at 54.7" (139 cm) of snowfall over the last week. We're expecting another 5-10" today and have a smaller storm in the forecast for Weds. #CAwx #CAwater

3/15/25 10:25am Update: 24 hour ❄️: 10.6" (27 cm) 2-day ❄️: 16.1" (41 cm) 7-day ❄️: 43.9" (111.5 cm) We will have a break today with some light snow this afternoon. The next storm occurs tomorrow night into Monday morning with 2-4 feet more currently expected. #CAwx #CAwater

We had 5.5" (14 cm) of light, fluffy #snow in the last day, which brings our 2-day total to 32.5" (82.5 cm). We're expecting another 7-14" over the next 24 hrs and up to another 3 ft through Tues. This storm has been particularly beneficial in central and southern regions where snowpack is lowest.

Only 4 hours left in the Big Give!

Today is the @UCBerkeley #BigGive when you have the opportunity to support the Snow Lab! This year, there are several ways to support the lab as we strive to continue our weather/water monitoring, research, and teaching! Check this out for more details: mailchi.mp/5418d26aeda5...

3/13/2025 10am Update: We had 27" (68.5 cm) of #snow accumulation in the last 24 hours, which brings our storm total to 27.8" (70.5 cm). Light to moderate snow will deliver a few more inches today and another significant storm will move in tomorrow morning. #CAwx #CAwater

🚨3/10/25 10:30am UPDATE🚨 The biggest storm window of the season is upon us! A consistent stream of storms over the next 7-10 days has the potential to bring us over 8 feet of snow! It's too early to lock in estimates but we'll be keeping a close eye on it. #CAwx #CAwater

3/7/25 8:45am Update: #Snow ended just before 4pm yesterday but we received 3.5" (9cm) before it did. That brings our storm total to just over 10" (25.5cm) - the upper limit of the forecast. We have a period of calm weather but plenty of snow is expected Weds. #CAwx #CAwater

You look like you need a break. Here, watch this ❄️

We received 6.3" (16 cm) of #snow in the last day. Snow is expected to end late today but there's the potential for big things (many feet of snow) 7-10 days out and, possibly, beyond. Miracle March? For now it's a Moderate March but that could change if the storm window stays open. #CAwx #CAwater

The @ucberkeleyofficial.bsky.social #BigGive is next week on Thursday 3/13/25! Every year we take part in this terrific day when our community comes together to support the lab. We have many different ways to support us this year, check out this link for details: tinyurl.com/3me5het5

After another 1.6" (4 cm) of #snow in the last day, our storm total is 4.3" (11 cm). Model ensembles are in agreement and are suggesting the beginning of an active period in the next 10 days, which would really help boost our below average snowpack. #CAwx #CAwater

We have a fresh 2.8" (7 cm) of #snow this morning with cool temps and calm conditions, another 1-3" is expected over the next 24 hours. There's a chance for more snow mid-week and models currently agree on the possibility of a more active pattern in mid-March. #CAwx #CAwater

The @cssl.bsky.social has been at the forefront of snow science for almost 80 years, maintaining the data that has huge implications for California’s water supply. @kqednews.kqed.org visited the lab in January during its first-ever Snow Science School. www.kqed.org/science...