|Virga descending from clouds over north Memphis on Wednesday morning. Photo credit: Angela High.|
Below is a "sounding" of the atmosphere over Memphis at 9am this morning. Temperature is the red line, dewpoint is the green line and the top of the image is at about 26,000' while the earth's surface is at the bottom. When the green and red lines are close together, the humidity is high; when they are far apart, humidity is very low, allowing evaporation to occur.
This morning, the base of the clouds were at about 15,000' and the precipitation was falling into a very dry area from a few thousand feet off the ground up to 10,000'. This is where the evaporation took place and virga formed.
|Atmospheric sounding over Memphis Wednesday morning, showing how virga formed.|
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