Low-flying clouds are a type of cloud formation that is found at a relatively low altitude, usually below 6, 000 feet. FOGS is an acronym for Fog, Stratus, Cumulus, and Stratocumulus, which are all types of low-flying clouds. These clouds are often seen in the morning or evening, when the air is cooler and more humid. They can also be seen during the day, but they tend to be less visible due to the sun's rays. Low-flying clouds can bring rain, snow, or even hail, depending on the weather conditions.