1-2-3 Rule

{
  "id": "MLC-T-MET-000003",
  "term": "1-2-3 Rule",
  "field": "Meteorology and atmospheric science",
  "definition": "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.",
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/1-2-3-rule/"
}