* Grey and Smooth: Stratus clouds are known for their uniform, grey color. They often have a smooth, featureless appearance.
* Covering the Whole Sky: Stratus clouds can spread out horizontally to cover the entire sky, creating a blanket-like effect.
* Blocking Out the Sun: While they don't completely block out all sunlight, stratus clouds can significantly reduce the amount of sunlight reaching the ground, making it appear dull and overcast.
Other Possibilities:
While stratus is the most likely culprit, other cloud types can share some characteristics:
* Nimbostratus: These clouds are darker, thicker, and often bring rain or snow.
* Altostratus: These clouds are a bit higher in the atmosphere and may be thinner, allowing some sunlight to penetrate.
It's Important to Note: Without more information, it's impossible to be 100% certain about the specific cloud type. However, stratus clouds are the most common and fit your description well.
