CS

CS is the abbreviation for Continuous Broadcast of In-Flight Weather Advisories (also called HIWAS, Hazardous In-flight Weather Advisory Service, on some charts and references). In the context of broadcast weather and the Instrument Procedures Handbook, CS specifically refers to the cirrostratus cloud type referenced in weather reports and forecasts, or to a continuous broadcast service depending on local usage. The most common FAA usage of CS in weather products is the cloud abbreviation 'cirrostratus.'

Plain English Meaning

CS stands for cirrostratus -- a thin, high, milky-looking sheet of cloud made of ice crystals. It often covers the whole sky and can put a halo around the sun or moon. When you see CS in a weather report, the forecaster is telling you cirrostratus is up there.

Full Definition

CS is the standard meteorological abbreviation for cirrostratus, a high-altitude, thin, sheet-like ice-crystal cloud that often covers large portions of the sky and can produce a halo around the sun or moon. It appears in aviation weather products such as METARs, TAFs, area forecasts, and pilot reports to indicate the presence and layer of cirrostratus cloud.

Context Anchor

Seen in , forecasts, and that use cloud- abbreviations.

CS

Plain English Meaning

Full Definition

Context Anchor

Derivation

Why Pilots Care

Grounding Statement

Intuition Check

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