What factors determine whether precipitation falls as drizzle or as heavier raindrops?



  1. 0 Votes

    Droplet size is a main factor (smaller droplets will fall out as drizzle).  The vertical velocity of the winds in the cloud also is a factor–drizzle drops do not have a large vertical velocity in their thinner clouds and thus have little time to grow, but rain droplets do, and thus are able to “run into each other” and accrete to grow larger as they are processed within the cloud before falling out as rain.

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