Cirrus clouds are thin, wispy clouds that form at high altitudes, typically above 20,000 feet. They are composed of ice crystals and are often associated with fair weather. However, they can also indicate changes in the weather.
When you see cirrus clouds, it usually means that the weather is currently stable and clear. These clouds are often seen on sunny days and do not produce precipitation. However, if cirrus clouds begin to thicken and lower, they can be a sign that a weather front is approaching. This could mean that rain or a storm is on the way within the next 24 to 48 hours.
In summary, cirrus clouds are generally associated with fair weather, but they can also serve as an early warning sign of changing weather conditions.