Plain English Meaning

Wide, flat, layer-like clouds that spread out across the sky in sheets instead of piling up into tall heaps. They usually bring steady rain or drizzle, smooth air, and low visibility.

Full Definition

Clouds that form in flat, horizontal, layered sheets rather than in tall, vertical mounds. They develop when a large mass of moist air is lifted gently and cools uniformly, producing a broad, even cloud deck. Stratiform clouds are typically associated with stable air, steady (rather than gusty) precipitation, smooth flying conditions, and reduced visibility.

Context Anchor

Seen in weather discussions about warm fronts, where cloud layers often spread ahead of the front and may bring steady rain or .