Definition of fog

30 Minutes

Jan Hemink

Definition of fog

Published: 01 January 2009

Jan Hemink from KNMI will give a practical session on fog in respect to the Aviation Meteorologist with an example from visibility observations and forecast of Fog at Amsterdam Airport Schiphol.

On a satellite image low layered Stratus is often compared to Fog. To actually know if there is Fog underneath this Stratus cover you have to know about the visibility. A problem than arises: When do we talk about Fog? The criteria for this is that the visibility should be below 1000 meters, but how do we defines this criteria during day and night.

The measurements of visibility in relation to the forecast will be a central point that is discussed in this presentation.

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Filed under Keywords:

Fog, Stratus, Synoptic Scale Meteorology