Grey Skies (weather)

[Azadre]

What causes the sky to become grey when there are no clouds on the radar or visable? I want my blue sky back!

 

[Harbringer]

the reason the sky is normally ble is because blue light waves violently bounce around while going through all the crap in the atmosphere(like dust particles)therefor reflecting of those particles and turning the sky blue. Why only blue bounces around alot i'll never know. The sky becomes grey becuase the clouds probably carrier off alot of particales in the air, therefor the distroted color of space is showing up. Distrorted becuase its so far away.At least i think thats rite.

 

[The Last Conformist]

What causes the sky to become grey when there are no clouds on the radar or visable? I want my blue sky back!

Thin clouds or haze at high altitudes, I believe.

 

[Aphex_Twin]

What causes the sky to become grey when there are no clouds on the radar or visable? I want my blue sky back!

The clouds are still there, only they cover the whole sky. Mid-altitude clouds (alto-) can give this apparently "cloudless" sky cover.

 

[CoolioVonHoolio]

Why only blue bounces around alot i'll never know

i think its blue because it reflects the color of the oceans which cover most of our planet.

 

[The Last Conformist]

It's because light of different wavelengths (-> different colours) are refracted with different strength by the atmosphere. Blue is refracted the most, thence it's the most spread out. When unusual amounts of refraction are going on, such as at sunset, the sky can turn red.

 

[Souron]

The clouds are still there, only they cover the whole sky. Mid-altitude clouds (alto-) can give this apparently "cloudless" sky cover.

I thought It was the stratus clound that covered the entire sky like that.


The reason blue light is refracted the most is becouse of the comparison of its wavelength to the diameter of nitrogen, the most abundent substance in the atmosphere..

 

[Quasar1011]

What causes the sky to become grey when there are no clouds on the radar or visable? I want my blue sky back!

You are in Ohio? I'd say it is haze, trapped underneath a temperature inversion. Industrial pollutants contribute to the haze, but so do salt particles from the nearby Great Lakes. Is the sky bluer in the afternoon? That is because the temperature inversion has broken, allowing turbulent mixing of the lower atmosphere, dispersing the haze.

Stratus and altostratus will cause a grey sky; but of course, those are visible clouds.

 

[Aphex_Twin]

I thought It was the stratus clound that covered the entire sky like that.

I meant alto-stratus. There are several categories of "stratus" but I thought this explained best what the first post asked: