The University of Southern California and surrounding areas can experience several types of weather hazards during different seasons of the year. The information and resources on this page can help you understand these hazards and how to be prepared. A number of these hazards are connected to atmospheric conditions that can be observed and predicted. The National Weather Service (NWS) holds the responsibility of issuing forecasts, watches, and warnings for various weather and water-related risks.

During weather emergencies, maintaining composure and staying vigilant is crucial. If weather conditions seem concerning, use the commercial radio, weather radio, and local television or monitor appropriate websites such as National Weather services and be on the lookout for Advisories, Watches or Warnings via. In case of any damage on campus, promptly notify Facilities Management & Construction or Compliance & Risk Management.

Warning Take Action!
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.
Watch Be Prepared
A watch is used when the risk of hazardous weather or a 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.
Advisory Be Aware
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.

For additional weather information, visit National Weather Service Safety Tips and Cal OES MyHazards.