30
votes
4answers
6k views

Why is the sky never green? It can be blue or orange, and green is in between!

I, like everybody I suppose, have read the explanations why the colour of the sky is blue: ... the two most common types of matter present in the atmosphere are gaseous nitrogen and oxygen. ...
20
votes
1answer
1k views

Can rain evaporate?

Are there any atmospheric condition under which a visible raindrop can fail to hit the ground by evaporating first? I imagine this would require a large vertical temperature difference, and possibly ...
3
votes
1answer
49 views

California “firenados”

There are spectacular rotating towers of fire that can be seen in recent television images of fire in California. In this video, we see that these fire towers can rotate either clockwise or counter ...
0
votes
0answers
27 views

How does atmospheric pressure work? [duplicate]

I heard that yesterday the atmospheric pressure at my location was exceptionally higher than normal and that explained why I had such a terrible headache all day. But what remained unclear was... How ...
5
votes
1answer
117 views

How can I estimate confidence intervals around the forecasted temperatures for future days?

Weather.com will happily give me temperature predictions for the next ten days, but no indication of how reliable those predictions are. So if I want to plan something for a week from today, or four ...
2
votes
2answers
763 views

Why England is so cloudy?

Why, physically, some regions of the globe are affected by a noticeable cloudiness respect to others? Is the reason why some places are also rainy the same?
1
vote
1answer
381 views

What's the altitude of the flat base of Cumulus clouds?

Is there a formula that describes the altitude of clouds with respect to the local temperature? I think of the flat bases of Cumulus clouds. Thanks...
2
votes
3answers
308 views

Why does the wind direction vary locally?

If the air is flowing with the earth, as it rotates, how do we feel a breeze and strong winds at times, as everyone has experienced, the wind shifts as if from many directions.
3
votes
2answers
109 views

Local real-time lightning tracker site?

Is there a site that tracks lightning strikes at a local level in real-time? Google results for "lightning tracker" yield several sites, but none do this. It seems easy enough to set up. Have ...
7
votes
2answers
730 views

Is the total mass of Earth's atmosphere essentially constant in time?

Per a few questions and comments on this site such as Huge buildings affect earth's rotation? I wonder, is the mass of the Earth's atmosphere roughly constant? We're burning an incredible amount ...
3
votes
2answers
168 views

Can wind currents form in the mesosphere?

Probably not the right forum for this question. How high in the atmosphere may an air-current form? Can a wind current form up in the mesosphere?
0
votes
1answer
412 views

why does gravitational force bring the clouds down? [duplicate]

Possible Duplicate: The Density of Clouds according to definition of cloud : A visible mass of condensed water vapor floating in the atmosphere, typically high above the ground as there's ...
0
votes
2answers
123 views

Atmosphere above huge fire areas (e.g., “fire ocean”)? [closed]

My question is more about climate sciences, but I hope that it is still related to physics. What would be possible atmospheric conditions for planet with some kind of "fire" ocean? I had some ...
3
votes
3answers
135 views

Are there convective movements similar to those in clouds everywhere in the atmosphere?

I heard there were powerful convective movements in clouds which were responsible for increasing the size of water droplets or ice crystals. My question is: do the same movements appear outside of ...
3
votes
1answer
318 views

Hail stones in summer?

This has always puzzled me. Yesterday (in London) it started hailing despite it being about $20^oC$. A couple of years ago I experienced hail in Sicily when it was about $35^oC$ in the shade!. How is ...