Questions tagged [clouds]

In meteorology, a cloud refers to a visible group of liquid droplets and/or frozen crystals made of water or various chemicals, suspended in the atmosphere.

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3
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2answers
139 views

Is it natural for clouds to flow near the surface?

A week ago, I have seen something that I have never seen before, Nah it's not a flying dragon, but clouds that were flowing so near my roof (about 5-6 meters above my roof). These are the pictures, I ...
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Why do clouds dissipate when mixing with dry air?

So if dry air is just low humidity, meaning it has the capacity to hold more water vapour, it should make sense that the water droplets from the clouds will just evaporate and fill that dry air with ...
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Why do clouds sometimes form in “plumes”?

When I started exploring GOES satellite images of cloud cover (such as this), I noticed clouds could form from "plumes." That is, large clouds could sometimes form by billowing up from one ...
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Can Cirrocumulus and Cirrostratus appear at the same time?

I see cirrocumulus fading away in the front and bunch of cirrostratus in the back. However, I was taught that cirrocumulus appear when the upper atmosphere is unstable while cirrostratus appear when ...
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Why are clouds outlining the southeastern United States?

While watching the Starlink 25 launch earlier this month, I noticed that the Florida peninsula seemed to be nicely outlined by clouds. Pulling up satellite imagery from that time showed that my ...
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How high could snow form on a mountain?

I was reminded recently of a moment in the Eragon books where the main characters see a "tall" mountain range, and then after a minute realize that the white sky stretching up above them is just ...
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374 views

Can clouds be formed without a pollen particle's role?

I read online that it is scientifically proven that pollen particles can trigger cloud formation "is that true"? if true ,does it mean that no clouds can be formed without pollen particles' ...
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Is the weather of Miami, Florida and the weather of Lagos, Nigeria the same

I've been to Lagos and it rains a lot sometimes overflooding but it's pretty sunny. I'm aware that it rains a lot too in Miami. Is the climate the same apart from Lagos being near Equator and ITCZ ...
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Equilibrium condition for Kelvin's Vapor Pressure-curvature equation

This is regarding the Correction due to 'Curvature of the drop' made by Lord Kelvin to the Clausius-Clapeyron Equation. So, the idea is that, during large scale nucleation of water vapour into cloud ...
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Is there scientific consensus on the existence of the iris effect

Question: Is there scientific consensus on the existence of the Iris Effect and whether it is a positive or negative feedback mechanism? If so, can you refer to a recent publication? Background: In ...
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Cloud Formations Near Capetown

Why do clouds form a 'tablecloth' which exactly fits the top of Table Mountain near Capetown, South Africa? Something about the table top tailors the clouds to fit it exactly. The thickness is smooth ...
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Do clouds always move?

Can a cloud ever be stationary with respect to the ground surface? For some reason (experience, logic?) it seems to me such case is not possible. I read that stationary fronts are defined as two air ...
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GOES image: parallel trains of clouds. What to make of them?

Here is a GOES visible image from today, 2019-12-01 about local noon, around Nova Scotia. Note the parallel trains or streaks of clouds, running approximately northwest to southeast. A few hours ...
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Ice Water Content from GFS file

I am working my way through this paper: http://downloads.hindawi.com/journals/amete/2017/8707234.pdf Equations 10 and 11 require the ice water content. I can't find it in the GFS grib2 file ...
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How to distinguish between Altocumulus, Stratocumulus and Cumulus clouds?

There are four different categories of clouds. High clouds, medium altitude clouds, lower clouds, and vertical tall clouds. They are broken down into ten genuses of clouds: Cirrus, Cirrocumulus, ...
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What is this narrow band of clouds?

I came across a narrow streak of clouds in Asia when playing with Google Earth. Does anyone know what that is?
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Why are the clouds white and Australia black in weather satellite infrared images?

The question Is the sunlight on the GOES-16 Imagery reaching from the east? shows a visible light image and so in the night areas the Earth appears dark and in the day areas the Earth is a bit ...
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Why is there a clear space between the ground and the cloud base?

On Earth there is a clear space between the ground and the cloud base. This phenomenon is not confined to Earth, it's the same on Venus, Mars and Titan (moon of Saturn). Is there a law of physics ...
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In which state of matter exactly are the clouds? [duplicate]

The state of the clouds and it can only be one of the three states, solid, liquid, or gas. Which one are clouds?
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Estimate cloudbase height

I am trying to estimate cloudbase height using calculations from my weather station temperature/humidity, by calculating those two variables I can get estimated cloudbase height but what puzzles me ...
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Why are Nowcasting SAF daytime products apparently truncated at solar angles of 20° (rather than the documented 10°)?

This image shows the Nowcasting Satellite Application Facility (NWCSAF) Cloud Liquid Water Path (LWP) product for 2020-01-08T12:00:00Z: Cloud LWP from NWCSAF. Source: NWCSAF. The Algorithm ...
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What causes this cloud formation?

This was taken about November 18 in southern Arizona, USA. I’ve never seen any clouds like this before. Is it natural or caused by some airplane?
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Short-term forecast of Europe by using synoptic charts

I should make a short-term forecast of Europe by using synoptic charts. I'm finding it really hard so I'd be glad if you help me. 'В' means high atmospheric pressure I'm trying to figure out the ...
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Could this cloud be artificially formed?

This photo was taken at 3000 m above sea level in an open field, during the day.
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Clouds altitude

I'm amateur photographer and professional programmer and I'm trying to create an application to predict exceptionally beautiful sunsets (something like https://www.flickr.com/photos/photogtom43/...
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From where we get the observed cloud liquid water content data

I want to study the clouds and its profile which requires some basic observed variables, does anyone knows how and from where we can get the observed liquid water content data.
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What type of cloud is this?

I live in a sub-tropical region of Australia. Earlier today, we experienced temperatures of 31C and it was clear about 2 hours before I went out and noticed the following clouds directly above my ...
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What is this ring of cloud?

We were in Legoland in Windsor (SE England) recently, and towards the end of the day, we noticed what looked like a ring of cloud in the sky. It was quite large (hard to say as being up in the sky we ...
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Ordered arrangement of clouds

I happened to take a photograph of a region of clouds ,and it seems to have a rather ordered arrangement ,if one looks towards the left of the image. Would there be a physical explanation for this or ...
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Are these plane trails seen from satellite

Here are photos from West of Normandy, at 7-9am after sunrise on the 14th of may, from the visible satellite. It's a bit strange that they are visible from space, they are 2-3 miles wide? Are they jet ...
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Can someone help me identify this cloud formation?

These pictures were taken today in Oklahoma City and I am both baffled and curious as to what formation this may be. I was wondering if anyone had any idea? Thank you!
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There are cloud identification guides, are there also (guided) rock identification websites?

Seeing all these rock identification questions, got me wondering, is there no straightforward guided rock identification website? In Intro to Geology lab, I remember going through a bit of a process ...
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What type of storm cloud is this?

We have had (and are still experiencing) waves of storms passing through this area of the central Queensland 'Capricornia' coast, Australia. This area is a subtropical coastal environment, close to ...
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What type of cloud formation are these dark low-hanging clouds?

I was thinking it could have been a non-rotating wall cloud, but I'm not sure. YouTube video Picture taken on September 9 2014... between 5-7 pm in North Georgia, about 40 miles north of Atlanta.
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What is this spaceship-shaped cloud?

This tweet from the European Space Agency (ESA)'s Spanish account show a striking photo of a round, flat, "space-ship-shaped" cloud in an otherwise completely clear sky. The stars are out so I assume ...
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What mechanism leads to these spectacular iridescent patterns in clouds labeled as a “Fire Rainbow”?

The 21-Feb-2016 BBC new article Singapore 'fire rainbow' cloud phenomenon lights up sky shows several photos of a rainbow-like iridescence in clouds on a sunny day in Singapore (about 1.3 degrees ...
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Do cloud formations change depending on the season?

I'm currently working on some software for cloud masking, and thus far I have only been using satellite data as recent as spring (northern hemisphere). However, I'm wondering if cloud coverage or ...
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Can airplanes trigger rain?

A lady was telling me that the lower clouds were contrails left from plane exhausts. I looked up and there were none I could see in the sky she pointed to Stratocumulus Clouds. I did not want to tell ...
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What causes clouds to appear blue?

In a thunderstorm cloud about sunset time, I saw these clouds, including some (in the upper right) that were a unique shade of blue. I don't think I've seen clouds quite that color before. I tried ...
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Roughly what proportion of a cloud does 'rain out'?

What proportion of the water in a cloud will 'rain out'? Or, comparing the cloud before and after it has rained, what proportion of the water is left afterwards? I really have no idea so am just ...
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How to tell if fog is made out of water droplets or ice crystals?

I understand that clouds can be made out of water droplets and/or ice crystals. And that fog is nothing else than low-lying clouds. However, I've experienced fog in a wide ranges of temperatures. I ...
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Weight vs. Mass of Clouds

I came across a statement online that said that an average cloud has a weight of 1 million pounds. My main question is, does a cloud actually have weight on Earth or was the term "weight" a colloquial ...
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Clouds moving in opposite directions

Today driving to work I saw a small, isolated horse's mane cloud at about 2000 feet. Directly above it was a small strato-cumulous cloud at 4000 feet and and they were moving in opposite directions. ...
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Electricity in clouds and induced magnetism

This is well known to everyone that clouds carry electric charges and cumulonimbus clouds contain huge amount of electricity. It is also known from Maxwell's equations that moving particles induce ...
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What would a planet's sky look like with different chemical compositions, such as low nitrogen, high methane etc?

What are the processes, chemicals and particles involved in creating colour in a planet's sky? Could you give some examples of sky colour processes different from what happens on Earth?
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Are there “transparent” clouds?

Comments below this answer to the question Why are lightning towers at launch pads topped with big hollow tubes with spiral windings and not “lightning rod-shaped” lightning rods? link to a 2013 ...
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What might cause these “wave clouds” near the horizon? Could it be gravity waves?

I found this image on a website - returned as a HTTP error 404 'not found'. But the clouds look strangely repetitive. At first I thought the image had been "photoshopped", but as @gerrit pointed out ...
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Difference between sulfuric clouds and sulfuric haze (on Venus)?

In a conversation in comments below this answer to the question in Space Exploration Could we see the surface of Venus after the explosion of a H-bomb in its atmosphere? we're speculating about what ...
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Is there a real time tool to monitor electric flow in the clouds?

I was wondering if there is a tool that shows electric charge in the clouds. Something like this, but more detailed.
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What reflects UV radiation more: stratus clouds or cumulus clouds?

Interested in this since I sometimes look down on the clouds in the plane, and wonder if some of the reflected UV-A radiation might damage my eyes.