A fair weather cloud is typically a cumulus cloud, often seen on sunny days.
Understanding Fair Weather Cumulus Clouds
Fair weather clouds, scientifically known as cumulus humilis, are indicators of stable atmospheric conditions. They form through convection, where warm air rises and cools, causing water vapor to condense into visible cloud droplets.
Characteristics of Fair Weather Clouds:
- Appearance: Small, puffy, and detached clouds with flat bases.
- Altitude: Relatively low, usually below 6,500 feet.
- Weather Indication: Generally associated with good weather, sunny skies, and little to no precipitation.
Why Cumulus Clouds Indicate Fair Weather
The stability of the atmosphere prevents these clouds from growing vertically into larger, storm-producing clouds. The rising air cools and spreads out, limiting the cloud's development.
What Happens if Conditions Change?
According to the provided reference, while cumulus often indicates fair weather, if conditions allow, they can grow into towering cumulus congestus or cumulonimbus clouds, potentially producing showers. Therefore, it's essential to monitor the development of cumulus clouds for potential weather changes.
