Overrunning

{
  "id": "MLC-T-MET-001966",
  "term": "Overrunning",
  "field": "Meteorology and atmospheric science",
  "definitions": [
    "The atmospheric process where a warmer, less dense air mass glides upward over a colder, more dense air mass. This upward motion often leads to condensation and the formation of widespread, stratiform clouds and precipitation. It is a characteristic feature of warm fronts and occluded fronts.",
    "A weather pattern in which a relatively warm air mass is in motion above another air mass of greater density at the surface. Embedded thunderstorms sometimes develop in such a pattern; severe thunderstorms (mainly with large hail) can occur, but tornadoes are unlikely.\n\nOverrunning often is applied to the case of warm air riding up over a retreating layer of colder air, as along the sloping surface of a warm front. Such use of the term technically is incorrect, but in general it refers to a pattern characterized by widespread clouds and steady precipitation on the cool side of a front or other boundary."
  ],
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/overrunning/"
}