The polar vortex is hitting the brakes
323 comments
·March 22, 2025xg15
> Second, though the impacts of March sudden warmings are very similar to those in mid-winter, spring is coming, so any Arctic air brought down in the US won't "feel" as cold compared to if it happened in January because we are in a warmer part of the year.
This part seems really handwavey. Could someone explain what they mean with "warmer part of the year" if not air temperature? Increased warming through more sunlight?
avianlyric
Imaging increased warming from sunlight raising ground and building temperatures probably impacts “felt” temperature quite a bit.
There a few different heat transfer mechanisms, with conduction and radiation being the big ones we care about here. Cold air impacts heat transfer via conduction, but temperature of surrounding surfaces (like buildings and the ground) impacts radiative heat transfer, which makes us a significant portion of your bodies heat transfer into it’s surrounding environment. Which is the reason why a clear night is colder than an overcast night. The clouds above reflect a significant amount of radiant energy back at you on a cloudy day, and on a clear night you’re directly exposed to cold emptiness of space which will radiate effectively zero heat back at you.
Good place to experience the difference between conduction and radiative heat, is being near a camp fire on a cold night. The camp fire doesn’t really warm the air around your body, but the emitted IR has a huge impact. Hence you end up with a very warm front, while still having a very cold back.
mathgeek
> so any Arctic air brought down in the US won't "feel" as cold compared to if it happened in January because we are in a warmer part of the year.
I read this pretty simply as "March is warmer than January". More hours of daylight, more direct angle, etc. Anyone living closer to the tropics knows that feeling of "it's cold but the sun is out" compared to being further away in winter.
xg15
Yeah, that makes sense. I was tripped up a bit because "march is warmer" sounds to me like an effect, not a cause - and it becomes paradoxical if there is a massive cold front underway at the same time.
But if they mean, there are other seasonal factors - such as daylight - that counteract the cold spell, which aren't there in winter, it makes more sense.
zeagle
Interesting article. We are past the usual -20 or lower six weeks where I am so feels like a typical year. If I choose a random northern place like Rankin Inlet NU it is still cold up there with a low of -33 tonight.
It is a sign of the times when I think huh, climate.gov… is that a reputable source?
leke
Disclaimer
Climate.gov’s Polar Vortex Blog is written, edited, and moderated by Amy Butler (NOAA Chemical Sciences Laboratory) and Laura Ciasto (NOAA Climate Prediction Center), with editorial and graphics support from the Climate.gov team (NOAA Climate Program Office). These are blog posts by subject matter experts, not official agency communications; if you quote from these posts or from the comments section, you should attribute the quoted material to the individual blogger or commenter, not to NOAA or or Climate.gov.
CoastalCoder
If they're making the blog posts in their capacity as NOAA employees, on an NOAA web page, wouldn't that imply that these are "official agency communications"?
Or is there some distinction I'm missing?
hnaccount_rng
Yes, an official agency communication would have to go through deliberations and consensus finding from ~all parts of NOAA, most blog posts will only have the input of those experts. While that will mostly not lead to significant deviations since all of the discussed areas are subject to scientific rigour there is always the human nature of all actors.
Back in university we would publish news entries for all our publications without any input from the university. But for some papers there was also an official press release by the university. That came both with additional restrictions (length, language level, flashiness) but also with additional reach (getting picked up by newspapers directly). I assume that pre-Trump this would have been a similar setup. No guess as to now though
mmaunder
Probably is. NOAA and other gov sources help us predict things like clear air turbulence related to the jet stream. One probably doesn’t want to politicize those kinds of predictions too much or risk scraping passengers and their dinners from ceilings.
joezydeco
Too late! NOAA's budget is getting slashed and they're stopping weather balloon launches, starting with the plains states. Good luck with those turbulence forecasts!
https://www.forbes.com/sites/marshallshepherd/2025/03/21/wea...
WillPostForFood
That's not what the poorly written article actually says. They are launching one baloon a day instead of two. You might think the article is being intentionally misleading with working like, "NWS issued a public information statement announcing that is is temporarily suspending the frequency of weather balloon launches at some of Weather Forecast Offices".
ketzo
There were a bunch of headlines last week about DOGE firing half of NOAA then rehiring them. I don’t think you should consider anywhere sacrosanct.
chneu
Most of those people are silent quitting or refusing to go back to work.
This applies across the board to these firings/rehirings. Why would anyone go back to work for real when you know you're just gonna be fired again?
transcriptase
To be fair there have been a bunch of headlines about a great many things, like office closures without mentioning the minor detail that the offices haven’t been used in years, the workforce is remote, and there is no impact on service delivery or staffing. Doesn’t stop journalists from dancing around the implication if it makes the orange man and mars man look bad though.
ZYbCRq22HbJ2y7
In the 2025 Presidential Transition Project, a number of members of the current administration proposed eliminating NOAA completely.
https://www.politico.com/news/2024/02/25/second-trump-term-0...
Based on the way things have been going, that seems to be the goal.
https://en.wikipedia.org/wiki/NOAA_under_the_second_presiden...
chneu
It's absolutely the goal. There has been a push from places like weather.com to privatize much of NOAA for years.
Noaa's free information is really good so it makes the playing field a bit too level for private companies. They don't really offer a substantially better product than NOAA so it makes their product less valuable.
A few years ago we had a company reach out to us saying they could give us hyper-localized forecasts for our ultra endurance events. After our first event using them I checked their data against NOAA. Surprise, their data was far less accurate than weather.gov.
Every private weather service is using NOAA's dataset and then tweaking it or adding their own data. All of them.
ForOldHack
Dinners were the least of the problems that Bush's admin had with NASA Goddard. It was the climatology, and long term predictions.
wonnage
I doubt that’ll stop the current administration from trying, even unintentionally
epicureanideal
> It is a sign of the times when I think huh, climate.gov… is that a reputable source?
Some have been wondering that for years already.
jMyles
.gov sources being disreputable is not new. My generation grew up with the food pyramid.
The silver lining is that understanding of this disrepute is nearing universality.
idiotsecant
The food pyramid is notable because it was so wrong for so long, which is very unusual. Most gov agency science is actually quite good .
mistrial9
sorry - the US Federal Forest Science has been a dumpster fire in the Sierra and other areas.. arrogant, wealthy, immovable and it turns out, dangerously misguided plus very willing to enforce their worldview.
In another comment there are bitter words about the nature of Monarchy, but it appears that it does not require a Monarchy to get things badly, seriously wrong.
Slava_Propanei
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alfiedotwtf
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phkahler
Yeah it'll be interesting if they privatize weather forecasting in the US. I'll be looking for European forecasts of US weather...
It's handy info, but I'm not gonna subscribe to see if I need a coat or umbrella.
3eb7988a1663
That has been touted around before, but what does the military do? I assume they are extremely aware of their supply chain and would not want to source weather from a commercial entity.
Will NORAD start doing clandestine weather modelling to be able to plan troop/ship movements?
saynay
There is no way private weather forecasting will be profitable enough to keep the required equipment running, at least at the quality we have had.
reaperducer
Yeah it'll be interesting if they privatize weather forecasting in the US
FWIW, there is already a massive industry of private weather forecasting.
I know personally, or have met, at least six fully trained meteorologists who don't work for the government. Most are in the oil industry, but one is in aquaculture, and another in shipping.
Most big energy, aviation, and logistics companies employ meteorologists. Probably other industries, too.
That said, the loss of the NWS would be a national tragedy, and one of the worst mistakes in American government history.
mrtesthah
All private/paid weather forecasts still rely on NOAA’s infrastructure, so we may not have any reliable forecasting anymore.
zeagle
I'm surprised they aren't privatizing GPS actually... seems to be a similarly helpful public service. While it does help subsidize future Korean airliners... it unfairly harms aircraft manufacturers. /s
thegreatpeter
Why would "they" privatize the weather? How dramatic.
a3w
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comrade1234
Minus 33 (the temp the parent referenced) is about the same in Celsius and Fahrenheit. I’m an American that lives in Europe but travels to MN/WI for family and noticed that convergence.
PaulDavisThe1st
-40 is the actual convergence point.
ficklepickle
Incorrect. You are thinking of -40.
rohan_
from March 6th
jay_kyburz
yeah, did it happen or not?
pc486
I'm not an expert, but it looks like the predicted wind reversal did occur.
In the article there's this figure: https://www.climate.gov/media/16838
The March 13th 10hPa forecast with the wind reversal and lobe is visible on measured data: https://earth.nullschool.net/#2025/03/13/2100Z/wind/isobaric...
macintux
What are the odds that NOAA has been forbidden to write anything about climate since this was posted?
3eb7988a1663
That's the beauty of the current chaos-driven model. No explicit marching orders required. Just let it be known that inconvenient facts/actions can be punished at any time. Self-censorship takes care of the rest.
lwansbrough
Is the author still employed?
ChuckMcM
I wondering if the authors were laid off from NOAA.
frereubu
From the dates on https://www.climate.gov/news-features/blogs it looks like this is / was a roughly weekly post, so it might take a while if you're waiting for them specifically.
AbstractH24
It's almost like there are better indicators of spring than groundhogs.
Spivak
So the thing was Groundhog Day is actually really interesting. The prediction doesn't really have to do with groundhogs but instead has to do with whether it is cloudy or not on Groundhog Day. It's kind of funny about it is that they kinda got it backwards. If you bet against Punxsutawney Phil you'll be doing better than random chance.
deadbabe
Is this good or bad
ForOldHack
It's good if you are looking for clearer weather, and bad if you follow the science of stratospheric ozone depletion. ( Counter intuitive. )
Supersaiyan_IV
Doing climate research in Fahrenheit in 2025 gives me second hand embarrassment.
pgkr
What makes you think the research was done in Fahrenheit? This is a blog post by a science communicator who’s trying to reach a wide audience of American-English speakers. It stands to reason that they’d use units that their audience is familiar with.
AngryData
Why? Celsius is just as arbitrary a choice as Fahrenheit. It brings nothing extra to the table. You might as well complain that tapered pipe threads are in US inches or that astronomers use AUs and light seconds rather than meters.
null
null
anthk
In Science, global standards matter. Such as Metric and Celsius.
AngryData
Fahrenheit and Celsius are defined perfectly with one another so are as easy to convert as using a different number base though. And both were originally defined at arbitrary points making neither one better suited than the other at really anything.
If they used an absolute scale like Kelvin, then sure it would be an objectively better standard, but Celsius has been defined via the Kelvin scale for over 70 years now, the same as Fahrenheit.
cowfarts
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CamperBob2
We'll be doing it in caves before long, if present trends persist.
cowfarts
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VoodooJuJu
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artursapek
Celsius is useful if you're a beaker of water. Fahrenheit is useful if you're a human.
typewithrhythm
Humans cannot reliably determine the difference in one degree c, even though it's bigger... Fahrenheit is too fine grained, and has no interesting points relative to the things I interact with. I freeze an boil water often, however
y33t
The base units of the metric system are often not very ergonomic. Why is a meter so damn big? And why is a gram so damn small? I can barely detect a gram. And a meter is frickin huge, causing people to usually divide it into hundredths of a meter, which you can hardly picture in your mind unless you already know what it looks like, especially arbitrary counts of cm. Metric's only real advantage is that it shares the same radix as our counting system.
What we really need is a new system of units...
djtango
I grew up during the F to C transition in the UK and F is not intuitive.
0 = ice 100 = steam
That is pretty intuitive if you ask me. And for gravy comfortable room temp is about 25
crazygringo
This is false. I frequently find myself annoyed at my AC because it only has settings of 72°F and 74°F, and they are a little too cold and a little too warm for me. I want 73°F. When it's around room temperature, you can absolutely tell the difference.
The further away from room temperature, the less we can distinguish. All our senses work logarithmically like that.
cowfarts
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NortySpock
30 is hot.
20 is nice.
10 is cold.
0 is ice.
Not hard to remember for converting Celsius to how humans typically perceive temperature.
timschmidt
My problem isn't remembering the scale, it's that Fahrenheit offers me double the effective resolution and descriptive accuracy without awkward decimal points in the numbers used.
I like my room at 73F, not 72F or 74F, and I can feel the difference. That's 22.77C. :-/
k_roy
Okay. Or, hear me out.
On a scale from 0-100, you have very cold and very hot.
Or you’ve got from 0-45. Where 0 is “meh” cold and 45 is incredibly warm.
So you’ve got a nice little 0-100 scale that all humans are going to experience just living that goes from very cold to very hot.
Or you’ve got a useless 0-100 scale that the bottom just means freezing, and ignores every pain point of being really cold below that, and anything really greater than 50C only has practical applications in cooking.
lotsofpulp
Perceiving temperature involves dew point and relative humidity, not just temperature.
artursapek
Cool yeah let's compress the entire scale to 0-35 and waste the other 65 up to 100 lol yeah what a great scale
tremon
What significance does 0°F have to a human?
asciimov
0°F was the outside temperature with 40 mph winds (60mph gusts) the time I had to venture to the middle of an empty field to break the ice on water tank with a hatchet so cows could get water.
ikiris
It’s cold.
bongodongobob
Exactly. Where I live we have temps from -20F to 110F, which is -30 to 43C. Idk, seems to me the hottest normal temp being 90ish and coldest normalish temp at 0 is a decent scale.
VoodooJuJu
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inetknght
Nah, Celsius is useful if you're a human. Fahrenheit is useful if you're an American.
chrismcb
If you are used to Celsius, sure. But the point the op was making is Fahrenheit was designed with humans in mind and Celsius with the changes of the state of water. Your average person didn't really care what temperature water boils at, just that it is hot.
timschmidt
Who needs 2x the effective resolution at human temperature scales? Or useful temperatures without significant digits beyond the decimal?
artursapek
0 is cold as fuck, 100 is hot as fuck. Perfect human scale. Stay jelly
mass_and_energy
Agreed, there's a reason most of the world uses it.
downrightmike
Ultimately the Earth will warm up, the ice caps melt, the coasts lose as the seas rise 10m
tim333
I think it's 90m? It's pretty slow though like 1m/century and probably like 50cm this one.
ineedaj0b
i see someone didn't enjoy the trip to venice.
gosub100
Not that it changes the outcome, but I swear I remember reading that the majority of sea-level rise actually comes from the thermal expansion of liquid water, not displacement from thawing of ice caps. Can anyone confirm/refute this?
mempko
And potentially organized human life collapses
nntwozz
Oil wars.
We are killing for guzzoline.
The world is running out of water.
Now there's the water wars.
Once, I was a cop. A road warrior searching for a righteous cause.
My name is Max. My world is fire and blood.
erikpukinskis
Is that possible? Can you describe the chain of events that would lead to that?
Seems vanishingly unlikely to me, on the face of it, but I admit I am not read up on all the possible doomsday scenarios.
fencepost
There wouldn't be a single factor driving it but a combination of many factors. Loss of coastline (and cities built along it) including greater susceptibility to storms for unaffected areas will obviously have economic costs, highly increased weather and storm variability will be significant (think monsoon rains, "atmospheric river," etc.), increased drought in some areas due to both temperature and weather pattern changes (see western US water rights among the states as the civil portion of this), mass movements of refugees (sure the US can close the southern border, but what happens if you get 50,000 migrants all deciding to come over at once in one area? Are you simply going to shoot all of them?).
Human extinction seems very unlikely, but the collapse of the infrastructure that allows creation of the infrastructure that allows modern life? That could be much more likely, particularly when you factor in military conflicts as well as purely climate-based changes and losses.
energy123
The equator contains billions of people.
It's quite hot around there. Wet bulb temperatures often near the edge of survivability outdoors.
It's worse now with 1-1.5C warming. If we don't stop, and we get to 3-5C warming, this could lead to large scale migration to Europe in pursuit of liveable climate. And warming won't stop unless we stop emitting greenhouse gases.
aorloff
it all started with the invention of Ice9
h4ck_th3_pl4n3t
How great that all large cities in the US are not at the coasts and none of them are even below sea level. Oh, wait...
fredsmith219
I’m amazed that climate.gov hasn’t been taken down yet.
kulahan
I honestly figured it’d be one of the first. That being said, France, UK, and USA are all moving towards more nuclear power. It might be at the point where it’s no longer possible to pretend we care about solar/wind, and can no longer realistically ignore climate change.
I’ve been saying for years that we’d know when governments were finally getting scared of climate change because we’d see real, very fast moves to install nuclear and, if possible, enhanced geothermal.
OKRainbowKid
I don't understand why acknowledgment of climate change would lead to nuclear over solar/wind.
qball
Because it's the one green solution that actually works as base load (other than hydroelectricity, but that's terrain-dependent), works 24/7 without any other affordances, and doesn't open you up to dependence on other nations to anywhere near the same degree.
Solar and wind are only cheap because a foreign nation makes the parts (if they were made domestically they wouldn't be cost-competitive, obviously). So in 20 years, when your PV panels are degrading and your turbines are wearing out, that foreign country's going to be able to charge you a lot more to replace it.
And if you want to see the results of cheap industrial inputs becoming expensive one only need look at the post-Nordstream German/European economic forecast. Even the poor should be able to afford to keep the lights on and the A/C running once the sun has set.
kulahan
Because solar and wind are extremely inefficient and dangerous when compared with nuclear. Nuclear and enhanced geothermal are both closing in on their dream forms (fusion and supercritical fluids), and are already sufficient as they are.
It’s not necessarily “over” them, it’s that it will get tons of attention because that level of power generation would take wayyyyy too long to build out and take wayyyy too much space before even getting into the fact that neither solution can work anywhere at any time.
Nuclear got a bad rap, but it is way too essential to ignore in this problem we’re facing. When the focus shifts, you can tell people are getting serious. Simple as that.
Edit: I did not realize this had somehow become a conservative viewpoint? I am a leftist.
PaulDavisThe1st
There are no "unsolved problems" for nuclear (because the safe storage of fissile waste for 10k years isn't a problem we need to solve, apparently). By contrast, getting solar+wind fully up and running requires totally solving the storage problem. Plus the libs love it. Hence ... nuclear.
matthewdgreen
There seems to be a delusional part of the Internet that is convinced that nuclear is the only future, and solar and wind aren’t. To settle this, you basically need to look at what China is doing —- which is to build a lot of nuclear and then exponentially more solar and wind. We’re a huge percentage of the way down the slide to a mostly renewable world with storage, and some nuclear at the edges.
But it isn’t a competition. I’d be just as happy if things were going the other way. Having a clear mental model of the world is just useful. https://cleantechnica.com/2024/01/12/nuclear-continues-to-la...
timewizard
I don't understand why people think a diversity of power generation options is somehow not something you would desperately want in the first world.
Your fashion sense is awesome; however, this is engineering, and we need as many options as we can get. There is zero sense in playing favorites here.
renewiltord
One of the best things to come out of destroying environmentalism is that we can finally get working on renewable energy instead of being blocked by suicidal environmentalists who find wind farms too ugly.
rob74
I think you're confusing environmentalists with NIMBYs who use (among others) environmental arguments to argue against projects they don't like.
acdha
Environmentalists have been pushing wind, solar, etc. for the last half century. There are a few shortsighted people who oppose wind farms but they represent a large, complex multinational movement in the same way that any one of us represents the tech industry, which is to say not at all.
In many cases, if you look at the complainants it’s also reasonable to question whether they’re fully honest about their motivations. For example, the big Martha’s Vineyard project was backed by the biggest environmental group in the area but by the opposition were people like commercial fishermen and various rich cranks like RFK Jr. and the Kochs who thought the change in view would affect their property values but do not otherwise live lives full of obvious strong environmentalist views.
codr7
Have you ever lived near wind turbines?
They take quite a toll on both wild life and people living in the area.
And are often abandoned as soon as they don't generate enough profits/are too expensive to maintain, with no one wanting to pay for cleaning up the area.
neuroelectron
Seems like the DOGE cuts were overhyped after all. Honestly, anything connected to Trump is overhyped. He has a protective aura of noise. You're not going to figure out what's going on by just reading headlines.
tdhz77
You offer no evidence, but you have convinced yourself so obviously abstracted from the ground that time will prove you were right. It’s a foolish path and I urge you to listen to what is happening. Within the last week government data is no longer accessible to researchers. Long standing government groups and private that study these areas are locked out. Overhyped? No. Like the manager that cuts the budget, gets the raise and sees the fallout much later. Your foolish comment falls flat Carly in line —- there are consequences and they are deadly. Overhyped? No. To suggest a thing is foolish beyond comprehension, it should ruin careers for such a bodacious and absurd point.
neuroelectron
Palantir seems to be chugging along just fine.
stevenbedrick
I’m here to say that the cuts to the NSF, NIH, DoE (both energy and education) and IRS are not overhyped at all; if anything they are badly underhyped.
What is overhyped is the actual “savings” that they are producing with all of this.
hallway_monitor
What would you cut? I don’t know what I would, but I do know that the United States is heading for a financial apocalypse unless drastic measures are taken now.
I know there’s a lot of hysteria around this, but I’m still at the place where I can be optimistic that the US will come out ahead. At least they’re doing something besides spending more money and acting like everything‘s OK. From a long-term financial stability standpoint it’s really not.
gortok
The damage is real even if the dollar amount of the cuts is overhyped.
sebmellen
They successfully took down large portions of the CFPB site.
artursapek
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disposableuname
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jmcgough
This is a purely factual article and is very careful not to make recommendations on current or future policy. This website will almost certainly disappear once they realize it's still up.
BoingBoomTschak
Because you did before? How cute.
timzaman
Very interesting article, but since it's 16 days old, seems like quite irrelevant news to hit the frontpage.
icegreentea2
Polar vortex collapse leads to cold polar air mass moving south over the course of the next few weeks. At least where I am, this article is coinciding within a day or so of the end of "fake spring".
In fact, this might help explain the concept of fake spring in general. The final collapse of the vortex is ultimately caused by warming of the northern hemisphere as spring kicks in. This implies that the pattern of "get pretty warm, then the polar vortex collapses, then you get one more surge of winter weather, and then you get real spring" is actually typical.
xeromal
Had no idea what led to fake spring so thanks for this tidbit!
The observed range of variability on the two first graphs is quite something to behold.