text: A type of this which is visible but cannot be collected is known as virga.
full_question: A type of this which is visible but cannot be collected is known as virga. This phenomenon occurs "every day" according to a refrain sung by Feste at the end of Shakespeare's Twelfth Night. Ibuse Masuji wrote a novel set partly during the Hiroshima atomic bombing, which was titled for the Black type of this phenomenon. This phenomenon often generates a pleasant odor known as (*) petrichor. In Greco-Roman myth, nymphs called Hyades control this stuff. Along with high temperature, its high frequency is a trait of Af and Am climates in the Koppen classification system. A namesake "shadow" where this phenomenon doesn't occur can be found on the leeward side of many mountain ranges. For 10 points, name this meteorological phenomenon, the main type of liquid precipitation.
first_sentence: A type of this which is visible but cannot be collected is known as virga.
raw_answer: ain [prompt on "water"; prompt on "precipitation"]