- Low, smooth cloud from large-scale lift and boundary layer cooling
- W023241Z
- Large-scale lift. A well-mixed, moist boundary layer (uniform distribution of moisture in the lower atmosphere) is cooling in the evening, narrowing the dewpoint spread or dewpoint depression. Mid-level cooling and lift associated with an approaching disturbance induces a low, smooth cloud sheet to form in the nearly saturated but stably stratified lower levels.
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