ground fog: meaning, definition, pronunciation and examples
Medium-LowTechnical / Meteorological / Descriptive
Quick answer
What does “ground fog” mean?
A dense, shallow layer of fog that forms over and immediately above the ground, typically on calm, clear nights due to radiational cooling.
Audio
Pronunciation
Definition
Meaning and Definition
A dense, shallow layer of fog that forms over and immediately above the ground, typically on calm, clear nights due to radiational cooling.
Often used metaphorically to describe a situation that is unclear or obscured at a basic, fundamental level, or a phenomenon that is localized and low-lying.
Dialectal Variation
British vs American Usage
Differences
Term is identical and equally understood in both varieties. British English may occasionally use 'radiation fog' as a more precise synonym. American English might use it more broadly in non-technical contexts.
Connotations
Neutral technical term in both. Can carry a slight literary or ominous connotation when used descriptively.
Frequency
Slightly more common in American English due to wider use in general aviation reports. In UK, 'patchy fog' or 'localised fog' might be more frequent in public forecasts.
Grammar
How to Use “ground fog” in a Sentence
[Ground fog] + verb (formed, lifted, settled, obscured)[Pilot/Airfield] + verb (encountered, reported) + [ground fog]Adjective (dense, patchy) + [ground fog] + verbVocabulary
Collocations
Examples
Examples of “ground fog” in a Sentence
noun
British English
- The forecast warned of patchy ground fog in the valleys at dawn.
- Ground fog is a common hazard for early morning runners in autumn.
American English
- The FAA issued a notice for ground fog at the regional airport.
- Drivers should be cautious of dense ground fog on the interstate before sunrise.
Usage
Meaning in Context
Business
Rare, used metaphorically: 'The company's finances were obscured by a ground fog of complex accounting.'
Academic
Used in geography, environmental science, and meteorology papers to describe specific formation conditions.
Everyday
Used in weather reports, travel warnings, and descriptive writing about morning scenes.
Technical
Standard term in aviation meteorology (METAR reports), agriculture (frost risk), and climate studies.
Vocabulary
Synonyms of “ground fog”
Vocabulary
Antonyms of “ground fog”
Watch out
Common Mistakes When Using “ground fog”
- Using 'ground fog' to describe any thick fog (it must be shallow).
- Confusing with 'frost' or 'mist'.
- Spelling as one word 'groundfog'.
- Using it as a verb.
FAQ
Frequently Asked Questions
No, fog reduces visibility to less than 1 km. Mist reduces visibility to between 1-2 km. Ground fog is a specific type of fog.
Yes, especially for transportation. It creates sudden, severe low-visibility patches for drivers and is a significant hazard for aviation during take-off and landing.
It forms in situ due to the ground cooling the air above it (radiation cooling). Other fogs, like advection fog, form when warm, moist air moves over a cooler surface.
It typically forms overnight and is most dense just before sunrise. It usually 'burns off' or dissipates within a few hours after sunrise as the ground warms.
A dense, shallow layer of fog that forms over and immediately above the ground, typically on calm, clear nights due to radiational cooling.
Ground fog is usually technical / meteorological / descriptive in register.
Ground fog: in British English it is pronounced /ɡraʊnd fɒɡ/, and in American English it is pronounced /ɡraʊnd fɑːɡ/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Shrouded in a ground fog of confusion”
- “The facts were hidden by a ground fog of bureaucracy”
Learning
Memory Aids
Mnemonic
Think of 'ground' coffee – it's fine and sits low. Ground fog is fine mist that sits low on the ground.
Conceptual Metaphor
OBSCURITY IS A FOG; LACK OF CLARITY IS LOW-VISIBILITY WEATHER; A FOUNDATIONAL PROBLEM IS A GROUND-LEVEL HAZARD.
Practice
Quiz
Which condition is MOST conducive to the formation of ground fog?