Forerunner

{
  "id": "MLC-T-MET-005720",
  "term": "Forerunner",
  "field": "Meteorology and atmospheric science",
  "definition": "A preliminary atmospheric or oceanic disturbance that precedes the main event, often indicating its impending arrival. For example, a swell propagating ahead of a distant storm system or a subtle change in wind direction before a cold front. Observing forerunners can provide early indications of significant weather changes.",
  "url": "https://mlchart.com/terminology/meteorology/forerunner/"
}