This feature service depicts the
National Weather Service (NWS) watches, warnings, and advisories within the United States. Watches and warnings are classified into
43 categories.
- A warning is issued when a hazardous weather or hydrologic event is occurring, imminent or likely. A warning means weather conditions pose a threat to life or property. People in the path of the storm need to take protective action.
- A watch is used when the risk of a hazardous weather or hydrologic event has increased significantly, but its occurrence, location or timing is still uncertain. It is intended to provide enough lead time so those who need to set their plans in motion can do so. A watch means that hazardous weather is possible. People should have a plan of action in case a storm threatens, and they should listen for later information and possible warnings especially when planning travel or outdoor activities.
- An advisory is issued when a hazardous weather or hydrologic event is occurring, imminent or likely. Advisories are for less serious conditions than warnings, that cause significant inconvenience and if caution is not exercised, could lead to situations that may threaten life or property.
Source
Sample Data
Update Frequency
Area Covered
- United States and Territories
What can you do with this layer?
- Customize the display of each attribute by using the Change Style option for any layer.
- Query the layer to display only specific types of weather watches and warnings.
- Add to a map with other weather data layers to provide insight on hazardous weather events.
- Use ArcGIS Online analysis tools, such as Enrich Data, to determine the potential impact of weather events on populations.
This map is provided for informational purposes and is not monitored 24/7 for accuracy and currency.
Additional information on Watches and Warnings.
