- Altostratus undulates is a variety of mid-level altostratus cloud defined by its distinct wavy, rippling or undulating.
o - These clouds occur when stable, moist air moves over a layer of wind shear, creating parallel bands or rolls on the cloud base, typically found at altitudes of 2,000 to 7,000 meters.
Key Characteristics
- Appearance
They exhibit undulating, wavy, or undulating patterns, often appearing as striped or rolled layers.
o - Altitude
Found in the mid-level of the atmosphere, typically between 6,500 and 20,000 feet (2-7 km).
o - Formation
Caused by atmospheric gravity waves, where winds at different altitudes move at varying speeds or directions, creating a rolling effect.
o - Structure
They can appear as continuous undulating sheets, or as distinct bands or ripples.
o - Weather Signals
They often indicate changing weather conditions, with the potential for approaching rain or snow.