Modern Meterology


What is the difference between a National Weather Service advisory, statement, watch, and warning?

The National Weather Service will issue a statement as a “first alert” of a major change in the weather. An advisory is issued when weather conditions are not life threatening, but individuals need to be alert to weather conditions. A weather watch is issued when conditions are more favorable than usual for dangerous weather conditions, e.g. tornadoes and violent thunderstorms. A watch is a recommendation for planning, preparation, and increased awareness (i.e., to be alert for changing weather, listen for further information, and think about what to do if the danger materializes). A warning is issued when a particular weather hazard is either imminent or has been reported. A warning indicates the need to take action to protect life and property. The type of hazard is reflected in the type of warning (e.g., tornado warning, blizzard warning).


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