A CWA is issued for all of the following conditions except which one?

A Convective Weather Advisory (CWA) is a product used to inform pilots and meteorologists about significant weather phenomena associated with convective activity. CWAs are typically issued for conditions such as severe turbulence, heavy precipitation, and significant icing because these can pose dangers to flight operations.

The reason light icing is not included in the scenarios for which a CWA is issued is due to its relatively low impact on flight safety compared to the other conditions listed. Light icing may present some risk, but it does not usually warrant the immediate attention and caution that severe turbulence, heavy snow, or even moderate icing generate.

In summary, the focus of CWAs is on weather conditions that are expected to create serious issues for aviation safety; hence, light icing falls outside the criteria for issuance. It is crucial for pilots and meteorologists to differentiate between these various intensities to ensure appropriate responses to weather advisories.