#mid-level clouds

• Altocumulus — A genus of middle-altitude clouds (situated between 2000 and 6000 meters), characterized by sheets, rolls, or globular masses of white or gray color, arranged in waves, rollers, or regular groups, often giving the impression of a mackerel sky.
• Altostratus — A genus of middle-altitude clouds (situated between 2000 and 6000 meters), characterized by a uniform, striated, or fibrous cloud sheet or layer of gray or bluish color, partially or totally covering the sky, allowing the Sun or Moon to be dimly seen as through ground glass, without generating a halo phenomenon.