NWSAlertItemType

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

Element	Data type	Description
type	Integer, see 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 warning or watch text is a long string of words describing the warning or watch in detail.
name	String	Location name.
zones	AlertZoneCountyType	List of zones included with the alert. US only.
counties	AlertZoneCountyType	List of counties included with the alert. US only.
provinces	AlertProvinceType	List of locations - provinces included with the alert. Canada only.
validFromTimeLocal	DateTime	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	DateTime	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.

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