Welcome Guest. Sign in or Signup

3 Answers

Aviation Weather: Mist vs Fog

Asked by: 13455 views , , , ,
Private Pilot, Student Pilot

How does the aviation weather center determine the classification of mist and fog?

Ace Any FAA Written Test!
Actual FAA Questions / Free Lifetime Updates
The best explanations in the business
Fast, efficient study.
Pass Your Checkride With Confidence!
FAA Practical Test prep that reflects actual checkrides.
Any checkride: Airplane, Helicopter, Glider, etc.
Written and maintained by actual pilot examiners and master CFIs.
The World's Most Trusted eLogbook
Be Organized, Current, Professional, and Safe.
Highly customizable - for student pilots through pros.
Free Transition Service for users of other eLogs.
Our sincere thanks to pilots such as yourself who support AskACFI while helping themselves by using the awesome PC, Mac, iPhone/iPad, and Android aviation apps of our sponsors.

3 Answers



  1. Lucas on Jul 14, 2012

    Fog is a cloud bank that touches the ground. Fog is usually the only type of cloud that can touch the ground. The same cloud that at see level is not fog may be fog where it contacts higher ground such as hilltops or mountain ridges.
    Mist is a phenomenon of small droplets suspended in air. It can occur as part of a natural weather phenomenon, or in volcanic activity, and is common in cold air above warmer water. For example when you exhale in the cold air of a winter storm, or the effects of a steam room of a sauna.
    The only difference between mist and fog is density and its effect on visibility. A cloud that reduces visibility to less than 3/4 of a statute mile a is called fog, whereas it’s called mist if visibility is grater than 3/4 of a statute mile
     
    Lucas
    http://passfaaexams.com/

    0 Votes Thumb up 0 Votes Thumb down 0 Votes



  2. Kris Kortokrax on Jul 14, 2012

    Close, but not quite.
     
    AIM Figure 7-1-23 shows the break point as 5/8 of a statute mile, not 3/4.

    +6 Votes Thumb up 7 Votes Thumb down 1 Votes



  3. Jim Foley on Jul 14, 2012

    And, doesn’t fog have to be within 50 ft. of the ground, otherwise it’s a cloud?

    0 Votes Thumb up 0 Votes Thumb down 0 Votes


Answer Question

Our sincere thanks to all who contribute constructively to this forum in answering flight training questions. If you are a flight instructor or represent a flight school / FBO offering flight instruction, you are welcome to include links to your site and related contact information as it pertains to offering local flight instruction in a specific geographic area. Additionally, direct links to FAA and related official government sources of information are welcome. However we thank you for your understanding that links to other sites or text that may be construed as explicit or implicit advertising of other business, sites, or goods/services are not permitted even if such links nominally are relevant to the question asked.