Requesting data by using the :id action is used for returning data for a particular item that has an identifier associated with it. This is the primary method for requesting general weather information for a single location (observations, forecasts, advisories, etc.) as the location's name or a zip code serves as the identifier.

Other endpoints may expect a certain value for the identifer, such as storm cells whose ID value is a combination of the radar site identifier and unique identifier assigned to every storm cell. Refer to an endpoint's detailed documentation for specific information regarding how to use the :id action.