Tornado Warning inside a Severe Thunderstorm Warning inside a Flash Flood Warning in LA County at the moment, if you're wondering how things are going... #CAwx #LArain

Flash Flood Warnings now in effect for most of SoCal Transverse Ranges as powerful storm slowly into the region. Rainfall has been torrential already in Santa Barbara/Ventura counties, but mostly light in LA. That will change soon, and flood risk will sharply rise. #CAwx

Rainfall rates up to 1.5 inches per hour forecast in Southern California on Wednesday. Rainfall of that intensity has a nearly 100% chance of triggering a debris flow within and downstream of the Eaton and Palisades burn areas. www.sfchronicle.com/weather/arti...

Beast mode

In 2026: Take care of each other. Stand up for each other.

70 environmental defenders & conservationists who died in 2025 Environmental progress often depends on endurance, sustained over years, by people whose work mattered long before their names did. news.mongabay.com/2025/12/envi...

When I teaching the Holocaust I note the Holocaust museum’s definition of a concentration camp is a prison whose inmates are denied due process. These are by definition concentration camps.

The full spiked 60 Minutes CECOT package, clean & subtitled. 1/5

Moisture flux / integrated waver vapor transport (a measure of atmospheric river potency) is forecast to be near record levels over Southern California on Wednesday. As this water vapor slams into the Transverse Ranges it will be condense and fall as very heavy rain. #CAwx

Heavy rainfall rates will "pose a significant threat of flash flooding, landslides, rock falls and mud slides," WPC wrote. "The greater than normal travel during the Christmas Holiday will likely expose a potentially larger number of people to these life threatening hazards." Here's a zoomed in map

Concerns have been raised by local officials about NWS comms for a levee breach situation in the Seattle metro last week. What happened - and why this shows the need for more oversight and a National Disaster Safety Board. tinyurl.com/2us26ka2

Happy #solstice! 🌞✨ A day humans have celebrated for thousands of years. Want to know why today is so special? Read more and watch a video to see what’s happening in the sky, wherever you are on Earth: buff.ly/ftR4oYX 📸 Paolo Bardelli.

The Winter Solstice alignment at Stonehenge today. Photo credit: Nick Bull x.com/i/status/200...

Summer solstice Australia.

If you want to give us the Denmark vaccine schedule, you also need to give us the 6+ month parental leave the Danes get, so that new babies can avoid picking up germs at daycare, and you need to give us universal healthcare.

Impeaching RFK Jr. is a matter of life and death.

New peak wind gust at NCAR Mesa Lab in Boulder, 113 MPH about 20 minutes ago. Stronger than the peak 108 MPH gust two days ago. Like the strongest gust at this station in 10+ years (even stronger than Marshall Fire gusts). #COWX

It may not seem like it with all the trees going down and transformers blowing, but winds are trending down in #Boulder. Peaks gusts have been below 55MPH for about an hour now (following a max of 88MPH in the city earlier). This trend will continue with most damaging winds ending in 1-2 hours #COWX

Now up to three separate spots with 100+ gusts in/near Boulder, two within the past hour. Again: It's considerably drier than Wednesday, and the wind started earlier (longer lasting wind event). Hence the extra concern today compared to Wednesday. #COwx

The winds in Colorado/Wyoming are insane. @mikezaccardi.bsky.social

This entire train got blown over this morning northwest of Cheyenne

This tree just came down on Pine St just west of Folsom St in Boulder. Winds already gusting to 100+ mph at NCAR Mesa Lab.

Already a 100 mph gust above Boulder so far today...expect more this afternoon. #COwx

"Do they know it's Christmas time at all?"

Boulder right now (via NCAR Foothills): 66° F, 9% RH, west wind gusting to 55 MPH. HIGH FIRE DANGER! #COWX #Boulderwx

ok BIG winds now hitting north Boulder 👤😑

If you're in/around Boulder, Colorado — or know anyone who is — today's the day that a fire start could quickly become a damaging fire storm. Be ready to evacuate immediately if told to do so. Here's the full briefing from Boulder NWS: www.weather.gov/media/bou/Ds...

NWS in Boulder, CO has just issued a rare "Particularly Dangerous Situation" (PDS) Red Flag Warning for extreme fire weather risk on Friday. Historically, PDS RFW issuances (including in California) have pinpointed days on which the most dangerous wildfires have occurred. #COwx

Colorado's first PARTICULARLY DANGEROUS SITUATION fire weather warning is in effect for the west side of Denver and Boulder. Foothill gusts to 80 mph and relative humidities of 10-15 percent will favor extreme fire behavior and rapid spread should ignition occur. Take this seriously!

Remarkable post on #Boulder windstorm #CoWx via @bouldercast.com - worth the follow! Clearly reliant on #NCAR data as well bouldercast.com/colorado-for... #SaveNCAR

For many years, I worked in Boulder CO as a computer guy in the Forecast Systems Lab, NCAR, and the National Science foundation. We, also took high interest data for the FAA and the NTSB. Project 2025 is the cookbook to dismantle Science. www.theatlantic.com/science/2025...

"A Democratic senator involved in the negotiations...said that Trump’s attempt to break up a premier weather and climate center based in Boulder, Colo., was like a “stick of dynamite” that exploded any chance of a bipartisan breakthrough on spending." thehill.com/homenews/sen...

This is the first "Particularly Dangerous Situation" Fire Weather Warning ever issued anywhere in the state of Colorado. #COwx

Yikes, an especially dangerous wildfire situation shaping up in Colorado on Friday. If you have friends or family in the Colorado front range foothills -- talk to them tonight and remind them to have their go bag ready.

NEW: Colorado Sens Hickenlooper and Bennet announce they're putting a hold on the Senate appropriations package to demand funding for NCAR. Bennet said today that the Trump administration's move to dismantle the climate/weather lab is retaliation for Tina Peters' imprisonment.

Another very active weather period for Pacific Coast will occur over the next 10 days, with very moist storms and a persistent (atmospheric river-associated) moisture transport corridor bringing copious rain progressively farther south into California by early next week. [Thread]

The outpouring of scientists sharing stories about their time at NCAR or collaborations with researchers there really tells you all you need to know about how central an institution to climate and weather research it is. It feels like every scientist I know (and hundreds I don’t!) have a connection

still think usaid is the biggest story of the year

Given all the insane things that the Trump regime has done, nothing should surprise us. But I’m still shocked and angry that they are going to dismantle NCAR.

Now over 534k w/o power in WA and OR, per poweroutage.us. That number has risen over 200k in just 1-2 hours. Safe to say "wind" is the dominant US weather word the next 3 days. High wind alerts from the Northwest -> coastal New England.

Quite a contrast... Warmest first half of December on record in Pacific NW, including Seattle and Portland. Among top 10 coldest in the Midwest and parts of the East, including Cleveland, Pittsburgh. (Data: SERCC)

One of the more interesting maps I've seen of late An inversion has trapped cool air and fog in the central valley of California all month Shown are temperature anomalies for December so far

Wind forecast verified with localized gusts exceeding 70 mph and more than a half million people without power across Washington and Oregon this morning.

About as "everything but the kitchen sink" as western Washington's weather can get.

NCAR is quite literally our global mothership. Everyone who works in climate and weather has passed through its doors and benefited from its incredible resources. Dismantling NCAR is like taking a sledgehammer to the keystone holding up our scientific understanding of the planet. Unbelievable.

This is the place that made me want to become a meteorologist 💔

Due to a combination of widespread anomalous to record-breaking warmth & a mix of low precip (in Rockies/northern Sierra) and heavy warm rain (vs snow, in Pac NW), numerous locations throughout the American West are reporting their lowest Dec 15 snow water equivalents on record.

AOC: I want to remind you where the real crime is. It's in the oligarchs taking $170 billion of our money from health care and food assistance and public programs and taking that and funneling it into a secret police program.

One levee yesterday, another today. I’m grateful there haven’t been any deaths, but boy do I feel for the folks whose homes have been flooded. We are so not ready, not in our infrastructure, not in our policies, not psychologically or socially. #EndFossilFuels