Snow or rain.
the dark cloudss
They appear grey because of excessive radiant heat build-up, when heat gets trapped under the sun (the sun's reflection; which produces heat), they then turn grey, the heat radiants form, the sun forms these clouds. At first they may appear as blue clouds but they eventually turn grey, sometimes though they are grey, if a grey cloud is shined through by the sun meaning light passes, the cloud turns blue. Heat radiated clouds, meaning heat buildup from the sun cause different clouds to form, grey clouds can be grey but in the first stage they are blue, sometimes buildup is excessive and you don't see the blue buildup, from above grey clouds may appear blue if it's all grey, but sometimes white are on top of grey clouds. There are three clouds that distinct them from other clouds, grey clouds also sometimes don't produce rain and have short wavelengths thus vanishing themselves. Grey clouds are clouds formed, there are three clouds that form, blue clouds (grey clouds) heat radiated culumus fractus, black clouds (heat radiated clouds formed with different pH water droplets), lastly there are red clouds (scarce); these form because of different explosions one may coin a sun explosion causes these. Grey clouds don't form from white clouds, white clouds are sometimes on top of grey clouds. Black, grey (blue) and red are distinct clouds; no cloud is alike. Also the sky is blue, grey is not apart of the rainbow as on ceases to know, the sun generates heat, what happens when an explosion happens grey or black skies form that is the same with clouds, heat creates these clouds, the suns heat. The main suns reflection along with it's other reflections form these clouds. The suns heat gets trapped in the upper atmosphere thus forming grey clouds. That is why you sometimes see separate build-up's from these clouds. Please excuse my writing also. Hope I help.
Cumulus clouds are identified by their fluffy nature. The clouds are often indicators of fair weather, but may build to a more dangerous situation depending upon humidity and temperature.
A Low Pressure System is the kind of system that allows clouds to form. When clouds form, you can get a cloudy day, with most low pressure systems, the clouds bring the rain.
Heavy Showers, Thunderstorms or Hail
clouds
depends on what kind of clouds, if it were white clouds the sky would be white. if it were grey clouds it would be grey
cirrus clouds mean usually fair (good) weather
grey clouds
Cumulus clouds typically indicate fair weather. They are fluffy and white with a flat base and appear during stable atmospheric conditions. However, they can develop into cumulonimbus clouds, which bring thunderstorms and potentially severe weather.
it brings in fair weather
thunder storms rainy weather clouds
Cumulus clouds usually indicate fair weather. However, towering cumulus clouds may be a precursor to thunderstorms.
Fair weather,but can also signal an approaching storm
Thunderstorms clouds heavy rain snow
the dark cloudss
it is a storm is coming