What You Need to Know:
Common conditions of formation: The virga tends to form at high temperatures and low humidity
Meaning of Name: Latin for ‘twig or branch’
Elaborated, more comprehensive information:
A virga is a special effect which can occur along with a number of clouds, most commonly altocumulus and altostratus. One other example is the nimbostratus virga, which displays visible streaks from the cloud, showing that it is either evaporating or sublimating before contact with the ground. The effect usual takes a hooked or angled form, either due to the wind direction natural sudden vaporisation which occurs in a virga.