NWSAlertItemsType

The structure NWSAlertItemsType represents the information about NWS weather warnings and weather watches.

Element	Attribute	Data type	Description
type		Integer, see also Supported NWS Warning or Watch Types.	Type of alert.
description		String, see also .Supported NWS Warning or Watch Types	Description of the alert.
severity		Integer	The severity of alerts from 1-100 with 1 being the most severe.
message		String	The severity of alerts from 1-100 with 1 being the most severe.
zone		AlertLocationType	List of zones included with the alert. US only[^1].
county		AlertLocationType	List of counties included with the alert. US only[^1].
location		AlertLocationType	List of locations included with the alert. Canada only[^1].
	validFromTimeLocal	Date	Date and time at the location the alert was issued by National Weather Service. The format is either YYYY-MM-DDThh:mm:ss.SSS + the timezone offset, unless the forecast is for a location in the UTC zone, in which the date and time is terminated by a Z.
	validUntilTimeLocal	Date	Alert expiration date and time at the location. The format is either YYYY-MM-DDThh:mm:ss.SSS + the timezone offset, unless the forecast is for a location in the UTC zone, in which the date and time is terminated by a Z.
	latitude	Double	Latitude of location polygon centroid in degrees in WGS 84 format.
	longitude	Double	Longitude of location polygon centroid in degrees in WGS 84 format.
	name	String	Location name.
	country	String	Country name.
	state	String	US-state name.

[^1]One alert may impact multiple counties or zones across multiple states. Typically, a watch will impact significantly more locations than a warning.