heat lightning

Thân thiện

Heat lightning flashes silently on the distant horizon.

Definition

Noun: * Heat lightning: Bright flashes of light near the horizon, typically on hot evenings, that are not accompanied by the sound of thunder. This phenomenon is usually attributed to distant lightning from a storm that is too far away for its thunder to be heard, with its light being reflected or scattered by clouds or particles in the atmosphere.

Usage

• The term is used specifically to describe the visual effect of silent, distant lightning, often seen on warm, humid nights.
• It is a compound noun and is typically used without an article when referring to the phenomenon in general.
  • We sat on the porch and watched the heat lightning flicker on the southern horizon.
  • The forecast calls for clear skies, but we might see some heat lightning in the distance.

Advanced Usage

• While scientifically not a distinct type of lightning, "heat lightning" is a common term in meteorology and everyday language to describe the observation of a distant electrical storm's light.
  • What you're calling heat lightning is actually a severe thunderstorm over fifty miles away.

Variants and Related Words

• Lightning (n): The visible flash of light caused by a discharge of atmospheric electricity.
• Sheet lightning (n): A type of lightning flash that illuminates a broad area of clouds, often appearing as a diffuse glow; heat lightning is often a form of perceived sheet lightning.

Synonyms

• Distant lightning: A more literal, descriptive synonym.
• Silent lightning: Emphasizes the lack of audible thunder.

Notes on Meaning

• It is important to understand that "heat lightning" does not refer to lightning generated by heat itself. The name is a historical colloquialism based on the association with hot summer evenings when such distant storms are commonly observed. The "heat" describes the typical weather conditions during which it is seen, not the cause of the lightning.

Học thuật

Noun

1. bright flashes of light near the horizon without thunder (especially on hot evenings); usually attributed to distant lightning that is reflected by clouds