An official website of the United States government
Here's how you know
A .mil website belongs to an official U.S. Department of Defense organization in the United States.
A lock (lock ) or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

National Weather Service Definitions


  • Tropical Disturbance:  A moving area of thunderstorms in the tropics.

  • Tropical Depression:  An area of low pressure, counter-clockwise rotation of clouds, and winds to 38 mph.

  • Tropical Storm:  A low pressure area with wind speeds increasing to 39-73 mph. A storm is given a name at his point.

  • Hurricane:  When a tropical storm reaches winds of 74 mph or greater, it is classified as a hurricane.

  • Advisory:  A dissemination of hurricane and storm data issued every 6 hours.

  • Special Advisory:  A notice given anytime there is a significant change in weather conditions or warnings.

  • Intermediate Advisory:  A report updating a regular advisory information every 2 to 3 hours, as necessary.

  • Gale Warning:  Wind speeds of 39-54 mph expected.

  • Storm Warning:  Wind speeds of 55-73 mph expected.

  • Hurricane Watch:  A hurricane may threaten your area within 36 hours.

  • Hurricane Warning:  A hurricane expected do strike your area within 24 hours or less.

  • Tornado Watch:  Tornadoes and severe thunderstorms are possible for your area.

  • Tornado Warning:  Tornadoes and severe thunderstorms are possible for your area.

  • Storm Surge:  The low pressures and strong winds associated with hurricanes and tropical storms cause the sea level to rise above normal tidal heights, giant waves, and unpredictable currents over a 50 mile area.


Google Translation Disclaimer

  • Google Translate, a third party service provided by Google, performs all translations directly and dynamically.
  • Commander, Navy Region Southeast, has no control over the features, functions, or performance of the Google Translate service.
  • The automated translations should not be considered exact and should be used only as an approximation of the original English language content.
  • This service is meant solely for the assistance of limited English-speaking users of the website.
  • Commander, Navy Region Southeast, does not warrant the accuracy, reliability, or timeliness of any information translated.
  • Some items cannot be translated, including but not limited to image buttons, drop down menus, graphics, photos, or portable document formats (pdfs).
  • Commander, Navy Region Southeast, does not directly endorse Google Translate or imply that it is the only language translation solution available to users.
  • All site visitors may choose to use similar tools for their translation needs. Any individuals or parties that use Commander, Navy Region Southeast, content in translated form, whether by Google Translate or by any other translation services, do so at their own risk.
  • IE users: Please note that Google Translate may not render correctly when using Internet Explorer. Users are advised to use MS Edge, Safari, Chrome, or Firefox browser to take full advantage of the Google Translate feature.
  • The official text of content on this site is the English version found on this website. If any questions arise related to the accuracy of the information contained in translated text, refer to the English version on this website, it is the official version.

Commander, Navy Region Southeast   |   PO Box 102   |   Jacksonville, FL 32212-0102
Official U.S. Navy Website