Tropical disturbance

{
  "id": "MLC-T-MET-002859",
  "term": "Tropical disturbance",
  "field": "Meteorology and atmospheric science",
  "definitions": [
    "A discrete weather system of apparently organized convection, generally 100 to 300 nautical miles in diameter, originating in the tropics or subtropics, having a non-frontal migratory character, and maintaining its identity for 24 hours or more. It is the initial stage of tropical cyclone development, lacking a closed surface circulation. The National Hurricane Center monitors these systems for potential intensification.",
    "A discrete tropical weather system of apparently organized convection--generally 100 to 300 mi in diameter--originating in the tropics or subtropics, having a nonfrontal migratory character and maintaining its identity for 24 hours or more. It may or may not be associated with a detectable perturbation of the wind field."
  ],
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/tropical-disturbance/"
}