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• A means of avoiding winds associated with a tropical cyclone by taking into account the forecast track error of the National Weather Service over a 10 year period which is approximately 100 nm in 24 hours, 200 nm for 48 hours and 300 nm in 72 hours. The forecast track error is added to the 34 knot wind radii to compute the danger area. The wind radii may be found within Tropical Cyclone Forecast Advisory (TCM) forecasts.

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  Cite Definition for 1-2-3 Rule

  American Psychological Association (APA)

  1-2-3 Rule. (n.d.). National Weather Service Glossary. Retrieved April 2, 2023, from website: http://www.expertglossary.com/definition/1-2-3-rule.

  Chicago Manual of Style (CMS)

  1-2-3 Rule. www.weather.gov. National Weather Service Glossary. NOAA National Weather Service. http://www.expertglossary.com/definition/1-2-3-rule (accessed: April 2, 2023).

  Modern Language Association (MLA)

  "1-2-3 Rule." National Weather Service Glossary. NOAA National Weather Service. 2 April. 2023 http://www.expertglossary.com/definition/1-2-3-rule.

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