AdvisoriesAlarmExt is true (the default), NWS weather advisories are dynamically modeled as Advisory components under this container.
Such advisories are initiated by provider-issued watches, warnings, and advisories of hazardous weather conditions, for that provider’s locale. When a weather advisory expires, the corresponding Advisory component is automatically removed from this container. Note that sometimes, there may be more than one weather advisory at a time.

The AdvisoryContainer’s default view is the Advisory Manager, a tabular listing of current advisories. Double-click an advisory for a popup showing all advisory properties, including the complete text “Description” and “Instructions” issued by the provider.

In addition to holding child Advisory components, the AdvisoryContainer has an “Alarm Enable” property and a related child Alarm Properties container.