Definition 1 of 2
Definition
A low-level cloud type forming a layer or patches of rounded, lumpy cloud masses, typically with bases between the surface and 6,500 feet AGL. Stratocumulus combines the layered character of stratus with the heaped, cellular structure of cumulus, often appearing as a gray or whitish sheet broken into rolls, rounded patches, or distinct elements with visible gaps or shading between them.
Plain English
A low, lumpy cloud layer that looks like a sheet of bumpy, puffy patches stuck together. It sits low in the sky and can cover most of it, but you can usually see breaks or shading between the lumps.
Context Anchor
Seen in weather reports, flight planning, and outside the cockpit when judging cloud layers and possible low cloud conditions.
Derivation
From Latin stratus, meaning 'spread out' or 'layered,' combined with cumulus, meaning 'heap' or 'pile.' The name describes exactly what the cloud is: a layered sheet made up of heaped, lumpy elements.
Why Pilots Care
Stratocumulus layers can lower ceilings and reduce visibility enough to affect VFR flight, though they usually bring only light turbulence or drizzle.
Grounding Statement
Picture a low sheet of clouds that has been broken into soft rolls or clumps across the sky.
Intuition Check
Do not read “stratocumulus” as only stratus or only cumulus. It has features of both: spread out like a layer, but lumpy like piled clouds.
Example Sentence 1
A stratocumulus layer at 3,000 feet kept the airport reporting an overcast ceiling all morning.
Example Sentence 2
Stratocumulus often develops after a front passes, creating stable but overcast conditions for the flight.