Weather Tidbits: Overrunning
This Weather Tidbits explains the process of overrunning. Overrunning occurs when advancing warm air hits cold air already in place. The warm air is now forced upwards and overruns the denser, cold air; the warm air cools as it rises causing moisture in the air to condense into clouds and precipitation. Eventually, the warm air cools down enough to where clouds and precipitation can’t form. Typical conditions when overrunning are cool temperatures, a steady, light rain, thick, low clouds along with fog or mist; and also possible in the winter are freezing rain, sleet or snow.