Reflectivities noted by a wind profiler in California. The data clearly show a descending upper cloud (note time increases from right to left in this display) that reaches the surface. The snow-level is indicated by the radar bright band at ~2.2 km MSL), as is the episodic decoupling between the upper cloud and the lower-altitude precipitation (note blue areas between 3.5-5.5 km MSL).
National Oceanic and Atmospheric Administration's Earth System Research Laboratory  Physical Sciences Division
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