Stratus clouds are low-level clouds that appear as a gray, featureless sheet covering the sky. They are often associated with overcast skies and drizzle or light rain. Here's a breakdown:

Key Characteristics:

* Altitude: Found below 2,000 meters (6,500 feet)

* Appearance: Smooth, uniform layer, resembling a gray blanket

* Precipitation: Often associated with drizzle, light rain, or snow (depending on temperature)

* Weather: Can indicate stable atmospheric conditions, but can also lead to fog formation

Types of Stratus Clouds:

* Stratus (St): The most common type, appearing as a continuous gray sheet.

* Stratocumulus (Sc): Rounded masses or patches arranged in sheets or layers, with gaps between them.

* Nimbostratus (Ns): Dark, gray clouds that produce continuous rain or snow.

Formation:

Stratus clouds form when warm, moist air is lifted and cooled. This cooling causes the water vapor in the air to condense into tiny water droplets, creating the cloud layer.

Interesting Fact:

Stratus clouds are often associated with fog. When stratus clouds descend to ground level, they form fog.

In Summary:

Stratus clouds are low-lying, gray sheets of cloud that can produce drizzle or light rain. They indicate stable atmospheric conditions and can contribute to fog formation.