/r/weather

Photograph via snooOG

A community for discussion and posts about weather. Mostly on Earth.

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Related subreddits

/r/AskWeather For asking questions

/r/atoptics For pretty things that light does in the sky

/r/climate For the average weather, past present and future

/r/longrangechaos For not-so-realistic long-range forecasts

/r/meteorology For a more scientific weather subreddit

/r/myweatherstation For questions and discussion about buying or making your own weather station

/r/naturesfury Nature can be scary sometimes

/r/radarloops For loops.....of radar

/r/stormchasing For those who aren't content to let the storms come to them

/r/stormfront For news and first-hand reports about weather

/r/Tornadoes For twisters and twister accessories

/r/TropicalWeather Specifically for tropical cyclones

/r/WeatherCanada For discussing how the weather will affect the maple syrup crop

/r/WeatherGifs For inefficiently compressed animations of weather

/r/weathernerds For nerds

/r/Winterwx For the colder stuff


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/r/weather

132,153 Subscribers

2

Anyone know a website where you can look at the weather predictions of a previous day and see if they were accurate?

I have had my fair share of weather apps/websites over the past few years, but none that have shown what weather they predicted for that day and how close it was to the actual weather.

0 Comments
2025/01/09
22:26 UTC

3

Los Angeles winds impacting wildfires

Can anyone let me know the wind (direction(s) of those impacting the Palisades fire? Is there a primary direction that it is traveling? I can't seem to find anything specific. I'm from the area and have lots of friends, relatives, past neighbors and co-workers in the immediate area. Thanks.

What is happening is horrifying.

1 Comment
2025/01/09
22:23 UTC

1

NYC wind

Wind speeds of 18 mph high today in nyc. I’m inside my home and I’m just hearing non stop wind sounds. Hope everyone is ok!

0 Comments
2025/01/09
22:13 UTC

2

How bad do winter storms have to be to knock out power for hours or days?

So I'm likely to be impacted by the winter weather this coming weekend in Atlanta, and Saturday afternoon I have a virtual event that requires me to stay online for the majority of the afternoon, so I'm trying to figure out if I should be worried about a potential power outage at that time.

I know there's a risk of power outages of some kind, but I have no idea whether that means "power might cut out for a few seconds every once in a while" or "you might lose power for an hour or more", much less how likely either scenario is -- even if we ignored the weather variables and said we knew for a fact we were getting 0.25" of ice.

Is there any sort of general guidance for how much ice leads to what level of outages, or any way I can find some historical comparison to get an idea of what to expect? Also, how long after the storm hits are power outages a risk?

1 Comment
2025/01/09
21:43 UTC

8

I've never noticed this phenomenon before. The shimmering effect seen in cold air, particularly during winter, occurs because of tiny ice crystals or frost.

I've never noticed this phenomenon before. The shimmering effect seen in cold air, particularly during winter, occurs because of tiny ice crystals or frost. Here’s an explanation of the process:

  1. Drop in Temperature: As temperatures decrease, moisture in the air can freeze, forming tiny ice crystals. This is more likely when the air contains higher humidity.

  2. Ice Crystals and Light: These crystals can bend and reflect light, producing a sparkling or glimmering effect. The size of the ice and the angle of the light can enhance the intensity of this visual phenomenon.

  3. Formation of Frost: Frost can accumulate on surfaces, and when light hits the frost-covered areas, it further contributes to the sparkling appearance, as the light interacts with the icy coating.

  4. Air Conditions: The clarity of the air, along with the presence of particles like dust or pollen, can influence how light interacts with the ice crystals, often intensifying the sparkle.

This sparkling effect is especially visible on clear, cold days when the contrast between the ice crystals and the surrounding environment is sharp, with sunlight accentuating the glittery visual.

8 Comments
2025/01/09
18:16 UTC

0

Nashville –or Tennessee in general– has some of the worst weather in the US, and very few people (outside of TN) ever talk about this.

First things first: This post may be uncontroversial to people who live in or near Tennessee. It may also seem trite if you dont know the reputation Nashville has in most of the US, as a "sunbelt" city.

Basically, Nashville has the worst of both worlds of the midwest and south, without the benefits (milder summers in the midwest, milder winters in the south) of either.

You get the summers of the south: suffocating, humid, hot. 90+ afternoons every day for weeks on end. nights that dont get cool enough for you to ever really cool off. big mosquitos. whole nine yards.

You get the winters of the southern midwest (STL, Indianapolis, southern Ohio). Bitter cold, snow, ice. And not just a little bit of snow or ice.. we're talking enough that you need to shovel your driveway to get out and scrape your cars. I've visited Nashville 6 times in the last 2 years (work), 3 of those times during the winter, and there was a substantial amount of snow on the ground every time. I've never seen that kind of thing in winters in Charlotte or Atlanta.

Most of the south gets spared from the "arctic blasts" that hit the midwest (and northeast) in the winters, but not Tennessee. There's one of them right now. for the next week, Nashville's temps are a full 10 degrees colder than Atlanta. Nashville has the same record low as St. Louis, at -18º. Charlotte's record low is -5. Both Atlanta and Richmond VA's record lows are -8. Even Washington, DC hasnt quite reached that record, despite getting close, at -15.

Conversely, most of the midwest gets spared from the Gulf of Mexico's weather systems, but not Tennessee. Hurricanes may not score direct hits (actually sometimes they do), but everything else about them, like the torrential rain and flooding, still affects Tennessee, with Hurricane Helene being a particularly bad example.

There may be only one or two major cities that have a similar worst-of-both-worlds situation. I think Dallas is one of them. But i cant think of many.

15 Comments
2025/01/09
18:05 UTC

2

Firefighters battle devastating Los Angeles wildfires

1 Comment
2025/01/09
15:56 UTC

10

Finally!

On the day we have to go to the doctors, of course.

2 Comments
2025/01/09
14:52 UTC

1

Geen voetbal 🏂🎿❄️

0 Comments
2025/01/09
14:41 UTC

4

Epic Winter Storms in Newfoundland Captured in Stunning Satellite Timelapse

1 Comment
2025/01/09
13:55 UTC

0

Does anyone know what this is, or if this is real? A light streaks across the sky during wildfire news coverage.

https://www.instagram.com/reel/DEkchmCJEbI/?igsh=bnF5OWdid3o5OXBj

I have not been able to find any more information on this. I have searched all over the net. Thank you in advance for your time!

2 Comments
2025/01/09
10:23 UTC

8

Cold 🥶 one.

1 Comment
2025/01/09
06:22 UTC

0

Are weather.com snowfall projections cumulative?

When it says 2" in the next 12 hours and 2" in the next 24 hours, are those the same 2" or is each additional? I can't tell.

1 Comment
2025/01/09
05:19 UTC

1

what am I missing in these SREF plumes

Looking at the NCEP SREF plumes for the upcoming week. It seems like news outlets are predicting 3+ inches of snow, but anything I'm seeing here shows less than an inch except an outlier or two. For reference this is Athens GA and the UTC 21 run.

2 Comments
2025/01/09
04:52 UTC

3

You can't even see the road anymore

7 Comments
2025/01/09
03:48 UTC

353

Nome, Alaska. 12 Degrees. Pretty soon, the ocean will freeze over and you can almost walk to Russia...

25 Comments
2025/01/09
01:31 UTC

34

Not Extreme but cute fake looking candy clouds over the Ards peninsula tonight (Northern Ireland)

1 Comment
2025/01/08
23:22 UTC

24

Circumzenithal arc today in Mobile, Alabama

0 Comments
2025/01/08
23:07 UTC

0

What this week's winter wallop means for farmers across the U.S.

0 Comments
2025/01/08
22:51 UTC

16

It's been snowing non-stop in central NY today. Every forecast says it's not, and even live radar shows no precipitation. How can they all be this wrong?

I am not a meteorologist, but I enjoy following the weather. I live in upstate New York, central NY to be more specific, and the Syracuse metro area to be even more specific.

The National Weather Service has had this region under winter weather advisories / warnings for lake effect snow for most of the week. It is actively snowing right now, and not lightly.

I get that lake effect snow is unpredictable, so forecasts simply aren't that reliable. If the winds shift slightly, so does the snow. I assume this is why the NWS issues their notices for a very large area and the details say that the snow will be hitting somewhere in that area and that area may change throughout the duration of the event. All that makes perfect sense.

I also know that the live radar view is a look at what's happening right now, not a forecast of what might happen. So what I don't understand is how it can be snowing over seemingly all of central New York today, but when you look at the radar (here's a screenshot of the "weather radar" on windy.com) it shows NO current precipitation over nearly all of New York state. It snowed like crazy here yesterday too, and the radar looked accurate the whole time. But today, it's snowing like crazy and the radar simply says it isn't.

On a related note, all 6 forecast services available to me in the Carrot weather app say it is not currently snowing when it clearly is. Most of them were wrong yesterday too, except AccuWeather (which is wrong today).

I'm sitting here at work trying to figure out if/when there will be a break in the snow so I can go home at that time, and I've got nothing to help me do that. I get that even the forecast services might be wrong, but I really don't understand how the radar can be this wrong for such a large storm. So, fellow weather nerds, how is the radar so wrong?

14 Comments
2025/01/08
19:58 UTC

73

First snow of 2025 in Downtown Frederick, Maryland

9 Comments
2025/01/08
19:08 UTC

5

What is the deal with weatherwise.app

I found this app on Apple Store, after Ryan Hall used it on his YouTube.

It’s a decent competitor to radaromega and RadarScope, except for one caveat. It is free! It doesn’t have all the bells and whistles, no split screen , inspector tool, etc but it’s totally free.

It also doesn’t some things that even radaromega wont do like predict snow amounts.

2 Comments
2025/01/08
19:08 UTC

107

Wind Destruction in Los Angeles

Los Feliz neighborhood

5 Comments
2025/01/08
18:43 UTC

40

NOAA's latest model shows the smoke from the fire in Los Angeles and how it will spread over the next 36 hours.

4 Comments
2025/01/08
17:42 UTC

1

Selection Bias in Extreme Event Attribution Studies

I see attribution studies posted on this sub quite a bit, and I Patrick Brown just put out an article that articulated some of issues with them. It is important to note, that the authors of these studies are not just systematically sampling extreme events as they happen, and that they often have political incentives to investigate some events and not others.

"The above sheds light on the reasons for certain choice biases in a particular study, but there is plenty of evidence that these selection biases are pervasive in the EEA field. After all, Dr. Myles Allen essentially founded the field with the motivation of answering the question, “Will it ever be possible to sue anyone for damaging the climate?”. This same motivation seems to animate many of the most high-profile scientists in the field today, like Allen’s protege, Dr. Friederike Otto (co-founder and leader of World Weather Attribution). She and her organization are frequently cited as bringing the necessary intellectual authority to credibly sue fossil fuel companies. She states the motivation of her work explicitly: “Attributing extreme weather events to climate change, as I do through my work as a climatologist, means we can hold countries and companies to account for their inaction.”

Similarly, Dr. Emily Theokritoff—a research associate at Grantham, who is working on an initiative to publish rapid impact attribution studies about extreme weather events, similar to World Weather Attribution—told Carbon Brief that “The aim is to recharge the field, start a conversation about climate losses and damages, and help people understand how climate change is making life more dangerous and more expensive.”

Given the explicitly stated motivation of those in the EEA field, it is quite reasonable to suppose that there are major selection biases at play, and thus, it is not at all surprising that the collective output of the EEA field would look so different from more broad comprehensive assessments."

Moreover, these attribution studies are often at odds with results published by the IPCC, which has a more systematic approach of measuring climatic changes.

"One might conclude from the collective output of [extreme event attribution] EEA studies that there is strong evidence indicating an increase in the frequency and intensity of extreme weather. Yet, this conclusion seems to be in tension with the more comprehensive evaluations of extreme weather changes found in the Intergovernmental Panel of Climate Change’s (IPCC) Working Group 1, Chapter 11, and Chapter 12, which are noticeably more reserved in their conclusions on identifying and attributing shifts in these extremes (see also Roger Pielke Jr.’s Weather Attribution Alchemy series).

The IPCC indicates that extreme heat over land is rising at a rate that is roughly equal to, or just below, the mean warming rate for land. This increase, however, is balanced by a decrease in extreme cold. Consequently, there is no substantial global net rise in the occurrence or intensity of extreme temperatures. Furthermore, the IPCC observes that there are currently not detectable globally coherent trends in inland flooding. Drought conditions are variable, with some types of droughts found to be increasing in specific areas, yet there is not evidence of any global trend in meteorological droughts characterized by precipitation deficits. Trends in tropical and extratropical cyclones, as well as severe thunderstorms, all show mixed results with no clear long-term increase."

https://www.breakthroughjournal.org/p/do-climate-attribution-studies-tell?r=ecbzu&utm_campaign=post&utm_medium=web

0 Comments
2025/01/08
17:00 UTC

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